Initial import of support files for all Digistump boards - Digispark, Pro, DigiX - including libraries, examples, tools, and other support files for the Arduino IDE

hardware/digistump/avr/libraries/RF24/examples/GettingStarted/GettingStarted.pde

@@ -0,0 +1,227 @@
+/*
+ Copyright (C) 2011 J. Coliz <maniacbug@ymail.com>
+
+ This program is free software; you can redistribute it and/or
+ modify it under the terms of the GNU General Public License
+ version 2 as published by the Free Software Foundation.
+ */
+
+/**
+ * Example for Getting Started with nRF24L01+ radios. 
+ *
+ * This is an example of how to use the RF24 class.  Write this sketch to two 
+ * different nodes.  Put one of the nodes into 'transmit' mode by connecting 
+ * with the serial monitor and sending a 'T'.  The ping node sends the current 
+ * time to the pong node, which responds by sending the value back.  The ping 
+ * node can then see how long the whole cycle took.
+ */
+
+#include <SPI.h>
+#include "nRF24L01.h"
+#include "RF24.h"
+#include "printf.h"
+
+//
+// Hardware configuration
+//
+
+// Set up nRF24L01 radio on SPI bus plus pins 9 & 10 
+
+RF24 radio(9,10);
+
+//
+// Topology
+//
+
+// Radio pipe addresses for the 2 nodes to communicate.
+const uint64_t pipes[2] = { 0xF0F0F0F0E1LL, 0xF0F0F0F0D2LL };
+
+//
+// Role management
+//
+// Set up role.  This sketch uses the same software for all the nodes
+// in this system.  Doing so greatly simplifies testing.  
+//
+
+// The various roles supported by this sketch
+typedef enum { role_ping_out = 1, role_pong_back } role_e;
+
+// The debug-friendly names of those roles
+const char* role_friendly_name[] = { "invalid", "Ping out", "Pong back"};
+
+// The role of the current running sketch
+role_e role = role_pong_back;
+
+void setup(void)
+{
+  //
+  // Print preamble
+  //
+
+  Serial.begin(57600);
+  printf_begin();
+  printf("\n\rRF24/examples/GettingStarted/\n\r");
+  printf("ROLE: %s\n\r",role_friendly_name[role]);
+  printf("*** PRESS 'T' to begin transmitting to the other node\n\r");
+
+  //
+  // Setup and configure rf radio
+  //
+
+  radio.begin();
+
+  // optionally, increase the delay between retries & # of retries
+  radio.setRetries(15,15);
+
+  // optionally, reduce the payload size.  seems to
+  // improve reliability
+  //radio.setPayloadSize(8);
+
+  //
+  // Open pipes to other nodes for communication
+  //
+
+  // This simple sketch opens two pipes for these two nodes to communicate
+  // back and forth.
+  // Open 'our' pipe for writing
+  // Open the 'other' pipe for reading, in position #1 (we can have up to 5 pipes open for reading)
+
+  //if ( role == role_ping_out )
+  {
+    //radio.openWritingPipe(pipes[0]);
+    radio.openReadingPipe(1,pipes[1]);
+  }
+  //else
+  {
+    //radio.openWritingPipe(pipes[1]);
+    //radio.openReadingPipe(1,pipes[0]);
+  }
+
+  //
+  // Start listening
+  //
+
+  radio.startListening();
+
+  //
+  // Dump the configuration of the rf unit for debugging
+  //
+
+  radio.printDetails();
+}
+
+void loop(void)
+{
+  //
+  // Ping out role.  Repeatedly send the current time
+  //
+
+  if (role == role_ping_out)
+  {
+    // First, stop listening so we can talk.
+    radio.stopListening();
+
+    // Take the time, and send it.  This will block until complete
+    unsigned long time = millis();
+    printf("Now sending %lu...",time);
+    bool ok = radio.write( &time, sizeof(unsigned long) );
+    
+    if (ok)
+      printf("ok...");
+    else
+      printf("failed.\n\r");
+
+    // Now, continue listening
+    radio.startListening();
+
+    // Wait here until we get a response, or timeout (250ms)
+    unsigned long started_waiting_at = millis();
+    bool timeout = false;
+    while ( ! radio.available() && ! timeout )
+      if (millis() - started_waiting_at > 200 )
+        timeout = true;
+
+    // Describe the results
+    if ( timeout )
+    {
+      printf("Failed, response timed out.\n\r");
+    }
+    else
+    {
+      // Grab the response, compare, and send to debugging spew
+      unsigned long got_time;
+      radio.read( &got_time, sizeof(unsigned long) );
+
+      // Spew it
+      printf("Got response %lu, round-trip delay: %lu\n\r",got_time,millis()-got_time);
+    }
+
+    // Try again 1s later
+    delay(1000);
+  }
+
+  //
+  // Pong back role.  Receive each packet, dump it out, and send it back
+  //
+
+  if ( role == role_pong_back )
+  {
+    // if there is data ready
+    if ( radio.available() )
+    {
+      // Dump the payloads until we've gotten everything
+      unsigned long got_time;
+      bool done = false;
+      while (!done)
+      {
+        // Fetch the payload, and see if this was the last one.
+        done = radio.read( &got_time, sizeof(unsigned long) );
+
+        // Spew it
+        printf("Got payload %lu...",got_time);
+
+	// Delay just a little bit to let the other unit
+	// make the transition to receiver
+	delay(20);
+      }
+
+      // First, stop listening so we can talk
+      radio.stopListening();
+
+      // Send the final one back.
+      radio.write( &got_time, sizeof(unsigned long) );
+      printf("Sent response.\n\r");
+
+      // Now, resume listening so we catch the next packets.
+      radio.startListening();
+    }
+  }
+
+  //
+  // Change roles
+  //
+
+  if ( Serial.available() )
+  {
+    char c = toupper(Serial.read());
+    if ( c == 'T' && role == role_pong_back )
+    {
+      printf("*** CHANGING TO TRANSMIT ROLE -- PRESS 'R' TO SWITCH BACK\n\r");
+
+      // Become the primary transmitter (ping out)
+      role = role_ping_out;
+      radio.openWritingPipe(pipes[0]);
+      radio.openReadingPipe(1,pipes[1]);
+    }
+    else if ( c == 'R' && role == role_ping_out )
+    {
+      printf("*** CHANGING TO RECEIVE ROLE -- PRESS 'T' TO SWITCH BACK\n\r");
+      
+      // Become the primary receiver (pong back)
+      role = role_pong_back;
+      radio.openWritingPipe(pipes[1]);
+      radio.openReadingPipe(1,pipes[0]);
+    }
+  }
+}
+// vim:cin:ai:sts=2 sw=2 ft=cpp

hardware/digistump/avr/libraries/RF24/examples/GettingStarted/Jamfile

@@ -0,0 +1,210 @@
+# (1) Project Information
+
+PROJECT_LIBS 	= SPI RF24 ;
+
+# (2) Board Information
+
+UPLOAD_PROTOCOL ?= arduino ;
+UPLOAD_SPEED 	?= 57600 ;
+MCU		?= atmega328p ;
+F_CPU 		?= 16000000 ;
+CORE		?= arduino ;
+VARIANT 	?= standard ;
+ARDUINO_VERSION	?= 100 ;
+
+# (3) USB Ports
+
+PORTS		= p4 p6 p9 u0 u1 u2 ;
+PORT_p6 	= /dev/tty.usbserial-A600eHIs ;
+PORT_p4 	= /dev/tty.usbserial-A40081RP ;
+PORT_p9		= /dev/tty.usbserial-A9007LmI ;
+PORT_u0 	= /dev/ttyUSB0 ;
+PORT_u1 	= /dev/ttyUSB1 ;
+PORT_u2 	= /dev/ttyUSB2 ;
+
+# (4) Location of AVR tools
+#
+# This configuration assumes using avr-tools that were obtained separate from the Arduino
+# distribution. 
+
+if $(OS) = MACOSX 
+{
+	AVR_BIN 	= /usr/local/avrtools/bin ;
+	AVR_ETC 	= /usr/local/avrtools/etc ;
+	AVR_INCLUDE	= /usr/local/avrtools/include ; 
+}
+else
+{
+	AVR_BIN 	?= /usr/bin ;
+	AVR_INCLUDE 	?= /usr/lib/avr/include ;
+	AVR_ETC 	= /etc ; 
+}
+
+# (5) Directories where Arduino core and libraries are located
+
+ARDUINO_DIR 	?= /opt/Arduino ;
+ARDUINO_CORE 	= $(ARDUINO_DIR)/hardware/arduino/cores/$(CORE) $(ARDUINO_DIR)/hardware/arduino/variants/$(VARIANT) ;
+ARDUINO_LIB 	= $(ARDUINO_DIR)/libraries ;
+SKETCH_LIB      = $(HOME)/Source/Arduino/libraries ;
+
+#
+# --------------------------------------------------
+# Below this line usually never needs to be modified 
+#
+
+# Tool locations
+
+CC	  	= $(AVR_BIN)/avr-gcc ;
+C++	 	= $(AVR_BIN)/avr-g++ ;
+LINK	  	= $(AVR_BIN)/avr-gcc ;
+OBJCOPY 	= $(AVR_BIN)/avr-objcopy ;
+AVRDUDE 	= $(AVR_BIN)/avrdude ;
+
+# Flags
+
+DEFINES  	+= F_CPU=$(F_CPU)L ARDUINO=$(ARDUINO_VERSION) VERSION_H ;
+OPTIM		= -Os ;
+CCFLAGS  	= -Wall -Wextra -mmcu=$(MCU) -ffunction-sections -fdata-sections ;
+C++FLAGS  	= $(CCFLAGS) -fno-exceptions -fno-strict-aliasing ;
+LINKFLAGS  	= $(OPTIM) -lm -Wl,--gc-sections -mmcu=$(MCU) ;
+AVRDUDEFLAGS	= -V -F -D -C $(AVR_ETC)/avrdude.conf -p $(MCU) -c $(UPLOAD_PROTOCOL) -b $(UPLOAD_SPEED) ;
+
+# Search everywhere for headers
+
+HDRS  	 	= $(PWD) $(AVR_INCLUDE) $(ARDUINO_CORE) $(ARDUINO_LIB)/$(PROJECT_LIBS) $(ARDUINO_LIB)/$(PROJECT_LIBS)/utility $(SKETCH_LIB)/$(PROJECT_LIBS) ;
+
+# Output locations
+
+LOCATE_TARGET	= $(F_CPU) ;
+LOCATE_SOURCE	= $(F_CPU) ;
+
+#
+# Custom rules
+#
+
+rule GitVersion
+{
+	Always $(<) ;
+	Depends all : $(<) ;
+}
+
+actions GitVersion
+{
+	echo "const char program_version[] = \"\\" > $(<)
+	git log -1 --pretty=format:%h >> $(<)
+	echo "\";" >> $(<)
+}
+
+GitVersion version.h ;
+
+rule Pde
+{
+	Depends $(<) : $(>) ;
+	MakeLocate $(<) : $(LOCATE_SOURCE) ;
+	Clean clean : $(<) ;
+}
+
+if ( $(ARDUINO_VERSION) < 100 )
+{
+	ARDUINO_H = WProgram.h ;
+}
+else
+{
+	ARDUINO_H = Arduino.h ;
+}
+
+actions Pde
+{
+	echo "#include <$(ARDUINO_H)>" > $(<) 
+	echo "#line 1 \"$(>)\"" >> $(<)
+	cat $(>) >> $(<) 
+}
+
+rule C++Pde
+{
+	local _CPP = $(>:B).cpp ;
+	Pde $(_CPP) : $(>) ;
+	C++ $(<) : $(_CPP) ;
+}
+
+rule UserObject
+{
+	switch $(>:S)
+	{
+		case .ino : C++Pde $(<) : $(>) ;
+		case .pde : C++Pde $(<) : $(>) ;
+	}
+}
+
+rule Objects
+{
+        local _i ;
+
+        for _i in [ FGristFiles $(<) ]
+        {
+		local _b = $(_i:B)$(SUFOBJ) ;
+		local _o = $(_b:G=$(SOURCE_GRIST:E)) ;
+                Object $(_o) : $(_i) ;
+                Depends obj : $(_o) ;
+        }
+}
+
+rule Main
+{
+        MainFromObjects $(<) : $(>:B)$(SUFOBJ) ;
+        Objects $(>) ;
+}
+
+rule Hex
+{
+	Depends $(<) : $(>) ;
+	MakeLocate $(<) : $(LOCATE_TARGET) ;
+	Depends hex : $(<) ;
+	Clean clean : $(<) ;
+}
+
+actions Hex
+{
+	$(OBJCOPY) -O ihex -R .eeprom $(>) $(<)
+}
+
+rule Upload
+{
+	Depends $(1) : $(2) ;
+	Depends $(2) : $(3) ;
+	NotFile $(1) ;
+	Always $(1) ;
+	Always $(2) ;
+	UploadAction $(2) : $(3) ;
+}
+
+actions UploadAction
+{
+	$(AVRDUDE) $(AVRDUDEFLAGS) -P $(<) $(AVRDUDE_WRITE_FLASH) -U flash:w:$(>):i
+}
+
+#
+# Targets
+#
+
+# Grab everything from the core directory
+CORE_MODULES  	= [ GLOB $(ARDUINO_CORE) : *.c *.cpp ] ;
+
+# Grab everything from libraries.  To avoid this "grab everything" behaviour, you
+# can specify specific modules to pick up in PROJECT_MODULES
+LIB_MODULES  	= [ GLOB $(ARDUINO_LIB)/$(PROJECT_LIBS) $(ARDUINO_LIB)/$(PROJECT_LIBS)/utility $(SKETCH_LIB)/$(PROJECT_LIBS) : *.cpp *.c ] ;
+
+# Grab everything from the current dir
+PROJECT_MODULES += [ GLOB $(PWD) : *.c *.cpp *.pde *.ino ] ;
+
+# Main output executable
+MAIN		= $(PWD:B).elf ;
+
+Main $(MAIN) : $(CORE_MODULES) $(LIB_MODULES) $(PROJECT_MODULES) ;
+Hex $(MAIN:B).hex : $(MAIN) ;
+
+# Upload targets
+for _p in $(PORTS)
+{
+	Upload $(_p) : $(PORT_$(_p)) : $(MAIN:B).hex ;
+}

hardware/digistump/avr/libraries/RF24/examples/GettingStarted/printf.h

@@ -0,0 +1,37 @@
+/*
+ Copyright (C) 2011 J. Coliz <maniacbug@ymail.com>
+ 
+ This program is free software; you can redistribute it and/or
+ modify it under the terms of the GNU General Public License
+ version 2 as published by the Free Software Foundation.
+ */
+ 
+/**
+ * @file printf.h
+ *
+ * Setup necessary to direct stdout to the Arduino Serial library, which
+ * enables 'printf'
+ */
+
+#ifndef __PRINTF_H__
+#define __PRINTF_H__
+
+#ifdef ARDUINO
+
+int serial_putc( char c, FILE * ) 
+{
+  Serial.write( c );
+
+  return c;
+} 
+
+void printf_begin(void)
+{
+  fdevopen( &serial_putc, 0 );
+}
+
+#else
+#error This example is only for use on Arduino.
+#endif // ARDUINO
+
+#endif // __PRINTF_H__

hardware/digistump/avr/libraries/RF24/examples/digispark_receive/digispark_receive.ino

@@ -0,0 +1,41 @@
+#include <SPI.h>
+#include "nRF24L01.h"
+#include "RF24.h"
+
+RF24 radio(9,12);
+const int LED = 1;
+
+const uint64_t pipes[2] = { 0xF0F0F0F0E1LL, 0xF0F0F0F0D2LL };
+
+// The various roles supported by this sketch
+typedef enum { role_ping_out = 1, role_pong_back } role_e;
+
+// The role of the current running sketch
+role_e role = role_pong_back;
+
+void setup() {
+  // put your setup code here, to run once:
+  pinMode(LED, OUTPUT);
+  
+  digitalWrite(LED, LOW);
+  radio.begin();
+  radio.setRetries(15, 15);
+  radio.openReadingPipe(1, pipes[1]);
+  radio.startListening();
+  digitalWrite(LED, HIGH);
+}
+
+void loop() {
+  if(radio.available()) {
+    unsigned long value;
+    bool done = false;
+    while(!done) {
+      done = radio.read(&value, sizeof(unsigned long));
+      delay(20);
+    }
+    
+    digitalWrite(LED, LOW);
+    delay(1000);
+    digitalWrite(LED, HIGH);
+  }
+}

hardware/digistump/avr/libraries/RF24/examples/digispark_send/digispark_send.ino

@@ -0,0 +1,36 @@
+#include <SPI.h>
+#include "nRF24L01.h"
+#include "RF24.h"
+
+RF24 radio(9,12);
+const int LED = 1;
+
+const uint64_t pipes[2] = { 0xF0F0F0F0E1LL, 0xF0F0F0F0D2LL };
+
+// The various roles supported by this sketch
+typedef enum { role_ping_out = 1, role_pong_back } role_e;
+
+// The role of the current running sketch
+role_e role = role_pong_back;
+
+void setup() {
+  // put your setup code here, to run once:
+  pinMode(LED, OUTPUT);
+  
+  digitalWrite(LED, LOW);
+  radio.begin();
+  radio.setRetries(15, 15);
+  radio.openWritingPipe(pipes[1]);
+  digitalWrite(LED, HIGH);
+}
+
+void loop() {
+  unsigned long value = 2000;
+  bool ok = radio.write(&value, sizeof(unsigned long));
+  
+  if(ok) {
+    digitalWrite(LED, LOW);
+    delay(2000);
+    digitalWrite(LED, HIGH);
+  }
+}

hardware/digistump/avr/libraries/RF24/examples/led_remote/Jamfile

@@ -0,0 +1,206 @@
+PROJECT_NAME 	= $(PWD:B) ;
+PROJECT_DIR 	= . ;
+PROJECT_LIBS = SPI RF24 ; 
+
+OUT_DIR = ojam ;
+F_CPU 		= 16000000 ;
+MCU             = atmega328p ;
+PORTS           = /dev/tty.usbserial-A600eHIs /dev/tty.usbserial-A40081RP /dev/tty.usbserial-A9007LmI ;
+
+UPLOAD_RATE 	= 57600 ;
+AVRDUDE_PROTOCOL = stk500v1 ;
+COM 		= 33 ;
+
+# Host-specific overrides for locations 
+if $(OS) = MACOSX 
+{
+ARDUINO_VERSION	= 22 ;
+OLD_DIR 	= /opt/arduino-0021 ;
+AVR_TOOLS_PATH 	= $(OLD_DIR)/hardware/tools/avr/bin ;
+AVRDUDECONFIG_PATH = $(OLD_DIR)/hardware/tools/avr/etc ;
+ARDUINO_DIR 	= /opt/Arduino ;
+ARDUINO_AVR 	= /usr/lib/avr/include ;
+}
+
+# Where is everything?
+ARDUINO_VERSION	?= 22 ;
+AVR_TOOLS_PATH 	?= /usr/bin ;
+ARDUINO_DIR 	?= /opt/arduino-00$(ARDUINO_VERSION) ;
+ARDUINO_AVR 	?= $(ARDUINO_DIR)/hardware/tools/avr/avr/include/avr ;
+AVRDUDECONFIG_PATH ?= $(ARDUINO_DIR)/hardware/tools ;
+ARDUINO_CORE 	= $(ARDUINO_DIR)/hardware/arduino/cores/arduino ;
+ARDUINO_LIB 	= $(ARDUINO_DIR)/libraries ;
+SKETCH_LIB      = $(HOME)/Source/Arduino/libraries ;
+AVR_CC  	= $(AVR_TOOLS_PATH)/avr-gcc ;
+AVR_CXX  	= $(AVR_TOOLS_PATH)/avr-g++ ;
+AVR_LD  	= $(AVR_TOOLS_PATH)/avr-gcc ;
+AVR_OBJCOPY 	= $(AVR_TOOLS_PATH)/avr-objcopy ;
+AVRDUDE 	= $(AVR_TOOLS_PATH)/avrdude ;
+
+DEFINES  	= F_CPU=$(F_CPU)L ARDUINO=$(ARDUINO_VERSION) VERSION_H ;
+CTUNING  	= -ffunction-sections -fdata-sections ;
+CXXTUNING  	= -fno-exceptions -fno-strict-aliasing ; 
+CFLAGS  	= -Os -Wall -Wextra -mmcu=$(MCU) $(CTUNING) ;
+CXXFLAGS  	= $(CFLAGS) $(CXXTUNING) ;
+LDFLAGS  	= -Os -lm -Wl,--gc-sections -mmcu=atmega328p ;
+
+# Search everywhere for headers
+HDRS  	 	= $(PROJECT_DIR) $(ARDUINO_AVR) $(ARDUINO_CORE) [ GLOB $(ARDUINO_LIB) $(SKETCH_LIB) : [^.]* ] ;
+
+# Grab everything from the core directory
+CORE_MODULES  	= [ GLOB $(ARDUINO_CORE) : *.c *.cpp ] ;
+
+# Grab everything from libraries.  To avoid this "grab everything" behaviour, you
+# can specify specific modules to pick up in PROJECT_MODULES
+LIB_MODULES  	= [ GLOB $(ARDUINO_LIB)/$(PROJECT_LIBS) $(SKETCH_LIB)/$(PROJECT_LIBS) : *.cpp ] ;
+
+# In addition to explicitly-specified program modules, pick up anything from the current
+# dir.
+PROJECT_MODULES += [ GLOB $(PROJECT_DIR) : *.c *.cpp *.pde ] ;
+
+# Shortcut for the out files
+OUT             = $(OUT_DIR)/$(PROJECT_NAME) ;
+
+# AvrDude setup
+AVRDUDE_FLAGS = -V -F -D -C $(AVRDUDECONFIG_PATH)/avrdude.conf -p $(MCU) -c $(AVRDUDE_PROTOCOL) -b $(UPLOAD_RATE) ;
+
+rule GitVersion
+{
+  Always $(<) ;
+  Depends all : $(<) ;
+}
+
+actions GitVersion
+{
+  echo "const char program_version[] = \"\\" > $(<)
+  git log -1 --pretty=format:%h >> $(<)
+  echo "\";" >> $(<)
+}
+
+GitVersion version.h ;
+
+rule AvrCc
+{
+  Depends $(<) : $(>) ;
+  Depends $(<) : $(<:D) ;
+  Clean clean : $(<) ;
+
+  CCHDRS on $(<) = [ on $(<) FIncludes $(HDRS) ] ;
+  CCDEFS on $(<) = [ on $(<) FDefines $(DEFINES) ] ;
+}
+
+actions AvrCc
+{
+  $(AVR_CC) -c -o $(<) $(CCHDRS) $(CCDEFS) $(CFLAGS) $(>) 
+}
+
+rule AvrC++
+{
+  Depends $(<) : $(>) ;
+  Depends $(<) : $(<:D) ;
+  Clean clean : $(<) ;
+
+  CCHDRS on $(<) = [ on $(<) FIncludes $(HDRS) ] ;
+  CCDEFS on $(<) = [ on $(<) FDefines $(DEFINES) ] ;
+}
+
+actions AvrC++
+{
+  $(AVR_CXX) -c -o $(<) $(CCHDRS) $(CCDEFS) $(CXXFLAGS) $(>) 
+}
+
+rule Pde
+{
+  Depends $(<) : $(>) ;
+  Depends $(<) : $(<:D) ;
+  Clean clean : $(<) ;
+
+}
+
+actions Pde
+{
+  echo "#include <WProgram.h>" > $(<) 
+  echo "#line 1 \"$(>)\"" >> $(<)
+  cat $(>) >> $(<) 
+}
+
+rule AvrPde
+{
+  local _CPP = $(OUT_DIR)/$(_I:B).cpp ;
+  Pde $(_CPP) : $(>) ;
+  AvrC++ $(<) : $(_CPP) ;
+}
+
+rule AvrObject
+{
+  switch $(>:S)
+  {
+    case .c :   AvrCc $(<) : $(>) ;
+    case .cpp : AvrC++ $(<) : $(>) ;
+    case .pde : AvrPde $(<) : $(>) ;
+  }
+}
+
+rule AvrObjects
+{
+  for _I in $(<) 
+  {
+    AvrObject $(OUT_DIR)/$(_I:B).o : $(_I) ;
+  }
+}
+
+rule AvrMainFromObjects
+{
+  Depends $(<) : $(>) ;
+  Depends $(<) : $(<:D) ;
+  MkDir $(<:D) ;
+  Depends all : $(<) ;
+  Clean clean : $(<) ;
+}
+
+actions AvrMainFromObjects
+{
+  $(AVR_LD) $(LDFLAGS) -o $(<) $(>) 
+}
+
+rule AvrMain
+{
+  AvrMainFromObjects $(<) : $(OUT_DIR)/$(>:B).o ;
+  AvrObjects $(>) ;
+}
+
+rule AvrHex
+{
+  Depends $(<) : $(>) ;
+  Depends $(<) : $(<:D) ;
+  Depends hex : $(<) ;
+  Clean clean : $(<) ;
+}
+
+actions AvrHex
+{
+  $(AVR_OBJCOPY) -O ihex -R .eeprom $(>) $(<)
+}
+
+rule AvrUpload
+{
+  Depends $(1) : $(2) ;
+  Depends $(2) : $(3) ;
+  NotFile $(1) ;
+  Always $(1) ;
+  Always $(2) ;
+  AvrUploadAction $(2) : $(3) ;
+}
+
+actions AvrUploadAction
+{
+  $(AVRDUDE) $(AVRDUDE_FLAGS) -P $(<) $(AVRDUDE_WRITE_FLASH) -U flash:w:$(>):i
+}
+
+AvrMain $(OUT).elf : $(CORE_MODULES) $(LIB_MODULES) $(PROJECT_MODULES) ;
+AvrHex $(OUT).hex : $(OUT).elf ;
+
+AvrUpload p6 : /dev/tty.usbserial-A600eHIs : $(OUT).hex ;
+AvrUpload p4 : /dev/tty.usbserial-A40081RP : $(OUT).hex ;
+AvrUpload p9 : /dev/tty.usbserial-A9007LmI : $(OUT).hex ;
+

hardware/digistump/avr/libraries/RF24/examples/led_remote/led_remote.pde

@@ -0,0 +1,255 @@
+/*
+ Copyright (C) 2011 J. Coliz <maniacbug@ymail.com>
+
+ This program is free software; you can redistribute it and/or
+ modify it under the terms of the GNU General Public License
+ version 2 as published by the Free Software Foundation.
+ */
+
+/**
+ * Example LED Remote
+ *
+ * This is an example of how to use the RF24 class to control a remote
+ * bank of LED's using buttons on a remote control.
+ *
+ * On the 'remote', connect any number of buttons or switches from
+ * an arduino pin to ground.  Update 'button_pins' to reflect the
+ * pins used.
+ *
+ * On the 'led' board, connect the same number of LED's from an
+ * arduino pin to a resistor to ground.  Update 'led_pins' to reflect
+ * the pins used.  Also connect a separate pin to ground and change
+ * the 'role_pin'.  This tells the sketch it's running on the LED board.
+ *
+ * Every time the buttons change on the remote, the entire state of
+ * buttons is send to the led board, which displays the state.
+ */
+
+#include <SPI.h>
+#include "nRF24L01.h"
+#include "RF24.h"
+#include "printf.h"
+
+//
+// Hardware configuration
+//
+
+// Set up nRF24L01 radio on SPI bus plus pins 9 & 10
+
+RF24 radio(9,10);
+
+// sets the role of this unit in hardware.  Connect to GND to be the 'led' board receiver
+// Leave open to be the 'remote' transmitter
+const int role_pin = A4;
+
+// Pins on the remote for buttons
+const uint8_t button_pins[] = { 2,3,4,5,6,7 };
+const uint8_t num_button_pins = sizeof(button_pins);
+
+// Pins on the LED board for LED's
+const uint8_t led_pins[] = { 2,3,4,5,6,7 };
+const uint8_t num_led_pins = sizeof(led_pins);
+
+//
+// Topology
+//
+
+// Single radio pipe address for the 2 nodes to communicate.
+const uint64_t pipe = 0xE8E8F0F0E1LL;
+
+//
+// Role management
+//
+// Set up role.  This sketch uses the same software for all the nodes in this
+// system.  Doing so greatly simplifies testing.  The hardware itself specifies
+// which node it is.
+//
+// This is done through the role_pin
+//
+
+// The various roles supported by this sketch
+typedef enum { role_remote = 1, role_led } role_e;
+
+// The debug-friendly names of those roles
+const char* role_friendly_name[] = { "invalid", "Remote", "LED Board"};
+
+// The role of the current running sketch
+role_e role;
+
+//
+// Payload
+//
+
+uint8_t button_states[num_button_pins];
+uint8_t led_states[num_led_pins];
+
+//
+// Setup
+//
+
+void setup(void)
+{
+  //
+  // Role
+  //
+
+  // set up the role pin
+  pinMode(role_pin, INPUT);
+  digitalWrite(role_pin,HIGH);
+  delay(20); // Just to get a solid reading on the role pin
+
+  // read the address pin, establish our role
+  if ( digitalRead(role_pin) )
+    role = role_remote;
+  else
+    role = role_led;
+
+  //
+  // Print preamble
+  //
+
+  Serial.begin(57600);
+  printf_begin();
+  printf("\n\rRF24/examples/led_remote/\n\r");
+  printf("ROLE: %s\n\r",role_friendly_name[role]);
+
+  //
+  // Setup and configure rf radio
+  //
+
+  radio.begin();
+
+  //
+  // Open pipes to other nodes for communication
+  //
+
+  // This simple sketch opens a single pipes for these two nodes to communicate
+  // back and forth.  One listens on it, the other talks to it.
+
+  if ( role == role_remote )
+  {
+    radio.openWritingPipe(pipe);
+  }
+  else
+  {
+    radio.openReadingPipe(1,pipe);
+  }
+
+  //
+  // Start listening
+  //
+
+  if ( role == role_led )
+    radio.startListening();
+
+  //
+  // Dump the configuration of the rf unit for debugging
+  //
+
+  radio.printDetails();
+
+  //
+  // Set up buttons / LED's
+  //
+
+  // Set pull-up resistors for all buttons
+  if ( role == role_remote )
+  {
+    int i = num_button_pins;
+    while(i--)
+    {
+      pinMode(button_pins[i],INPUT);
+      digitalWrite(button_pins[i],HIGH);
+    }
+  }
+
+  // Turn LED's ON until we start getting keys
+  if ( role == role_led )
+  {
+    int i = num_led_pins;
+    while(i--)
+    {
+      pinMode(led_pins[i],OUTPUT);
+      led_states[i] = HIGH;
+      digitalWrite(led_pins[i],led_states[i]);
+    }
+  }
+
+}
+
+//
+// Loop
+//
+
+void loop(void)
+{
+  //
+  // Remote role.  If the state of any button has changed, send the whole state of
+  // all buttons.
+  //
+
+  if ( role == role_remote )
+  {
+    // Get the current state of buttons, and
+    // Test if the current state is different from the last state we sent
+    int i = num_button_pins;
+    bool different = false;
+    while(i--)
+    {
+      uint8_t state = ! digitalRead(button_pins[i]);
+      if ( state != button_states[i] )
+      {
+        different = true;
+        button_states[i] = state;
+      }
+    }
+
+    // Send the state of the buttons to the LED board
+    if ( different )
+    {
+      printf("Now sending...");
+      bool ok = radio.write( button_states, num_button_pins );
+      if (ok)
+        printf("ok\n\r");
+      else
+        printf("failed\n\r");
+    }
+
+    // Try again in a short while
+    delay(20);
+  }
+
+  //
+  // LED role.  Receive the state of all buttons, and reflect that in the LEDs
+  //
+
+  if ( role == role_led )
+  {
+    // if there is data ready
+    if ( radio.available() )
+    {
+      // Dump the payloads until we've gotten everything
+      bool done = false;
+      while (!done)
+      {
+        // Fetch the payload, and see if this was the last one.
+        done = radio.read( button_states, num_button_pins );
+
+        // Spew it
+        printf("Got buttons\n\r");
+
+        // For each button, if the button now on, then toggle the LED
+        int i = num_led_pins;
+        while(i--)
+        {
+          if ( button_states[i] )
+          {
+            led_states[i] ^= HIGH;
+            digitalWrite(led_pins[i],led_states[i]);
+          }
+        }
+      }
+    }
+  }
+}
+// vim:ai:cin:sts=2 sw=2 ft=cpp

hardware/digistump/avr/libraries/RF24/examples/led_remote/printf.h

@@ -0,0 +1,37 @@
+/*
+ Copyright (C) 2011 J. Coliz <maniacbug@ymail.com>
+ 
+ This program is free software; you can redistribute it and/or
+ modify it under the terms of the GNU General Public License
+ version 2 as published by the Free Software Foundation.
+ */
+ 
+/**
+ * @file printf.h
+ *
+ * Setup necessary to direct stdout to the Arduino Serial library, which
+ * enables 'printf'
+ */
+
+#ifndef __PRINTF_H__
+#define __PRINTF_H__
+
+#ifdef ARDUINO
+
+int serial_putc( char c, FILE * ) 
+{
+  Serial.write( c );
+
+  return c;
+} 
+
+void printf_begin(void)
+{
+  fdevopen( &serial_putc, 0 );
+}
+
+#else
+#error This example is only for use on Arduino.
+#endif // ARDUINO
+
+#endif // __PRINTF_H__

hardware/digistump/avr/libraries/RF24/examples/nordic_fob/Jamfile

@@ -0,0 +1,219 @@
+# (1) Project Information
+
+PROJECT_LIBS 	= RF24 SPI ; 
+PROJECT_DIRS	= $(PWD) ;
+
+# (2) Board Information
+
+UPLOAD_PROTOCOL ?= stk500v1 ;
+UPLOAD_SPEED 	?= 115200 ;
+MCU		?= atmega328p ;
+F_CPU 		?= 16000000 ;
+CORE		?= arduino ;
+VARIANT 	?= standard ;
+ARDUINO_VERSION	?= 100 ;
+
+# (3) USB Ports
+
+PORTS		= p4 p6 p9 u0 u1 u2 ;
+PORT_p6 	= /dev/tty.usbserial-A600eHIs ;
+PORT_p4 	= /dev/tty.usbserial-A40081RP ;
+PORT_p9		= /dev/tty.usbserial-A9007LmI ;
+PORT_u0 	= /dev/ttyUSB0 ;
+PORT_u1 	= /dev/ttyUSB1 ;
+PORT_u2 	= /dev/ttyUSB2 ;
+
+# (4) Location of AVR tools
+#
+# This configuration assumes using avr-tools that were obtained separate from the Arduino
+# distribution. 
+
+if $(OS) = MACOSX 
+{
+	AVR_BIN 	= /usr/local/avrtools/bin ;
+	AVR_ETC 	= /usr/local/avrtools/etc ;
+	AVR_INCLUDE	= /usr/local/avrtools/include ; 
+}
+else
+{
+	AVR_BIN 	= /usr/bin ;
+	AVR_INCLUDE 	= /usr/lib/avr/include ;
+	AVR_ETC 	= /etc ; 
+}
+
+# (5) Directories where Arduino core and libraries are located
+
+ARDUINO_DIR 	?= /opt/Arduino ;
+ARDUINO_CORE 	= $(ARDUINO_DIR)/hardware/arduino/cores/$(CORE) $(ARDUINO_DIR)/hardware/arduino/variants/$(VARIANT) ;
+ARDUINO_LIB 	= $(ARDUINO_DIR)/libraries ;
+SKETCH_LIB      = $(HOME)/Source/Arduino/libraries ;
+
+#
+# --------------------------------------------------
+# Below this line usually never needs to be modified 
+#
+
+# Tool locations
+
+CC	  	= $(AVR_BIN)/avr-gcc ;
+C++	 	= $(AVR_BIN)/avr-g++ ;
+LINK	  	= $(AVR_BIN)/avr-gcc ;
+AR		= $(AVR_BIN)/avr-ar rcs ;
+RANLIB		= ;
+OBJCOPY 	= $(AVR_BIN)/avr-objcopy ;
+AVRDUDE 	= $(AVR_BIN)/avrdude ;
+
+# Flags
+
+DEFINES  	+= F_CPU=$(F_CPU)L ARDUINO=$(ARDUINO_VERSION) VERSION_H ;
+OPTIM		= -Os ;
+CCFLAGS  	= -Wall -Wextra -Wno-strict-aliasing -mmcu=$(MCU) -ffunction-sections -fdata-sections ; 
+C++FLAGS  	= $(CCFLAGS) -fno-exceptions -fno-strict-aliasing ;
+LINKFLAGS  	= $(OPTIM) -lm -Wl,--gc-sections -mmcu=$(MCU) ;
+AVRDUDEFLAGS	= -V -F -D -C $(AVR_ETC)/avrdude.conf -p $(MCU) -c $(UPLOAD_PROTOCOL) -b $(UPLOAD_SPEED) ;
+
+# Search everywhere for headers
+
+HDRS  	 	= $(PROJECT_DIRS) $(AVR_INCLUDE) $(ARDUINO_CORE) $(ARDUINO_LIB)/$(PROJECT_LIBS) $(ARDUINO_LIB)/$(PROJECT_LIBS)/utility $(SKETCH_LIB)/$(PROJECT_LIBS) ;
+
+# Output locations
+
+LOCATE_TARGET	= $(F_CPU) ;
+LOCATE_SOURCE	= $(F_CPU) ;
+
+#
+# Custom rules
+#
+
+rule GitVersion
+{
+	Always $(<) ;
+	Depends all : $(<) ;
+}
+
+actions GitVersion
+{
+	echo "const char program_version[] = \"\\" > $(<)
+	git log -1 --pretty=format:%h >> $(<)
+	echo "\";" >> $(<)
+}
+
+GitVersion version.h ;
+
+rule Pde
+{
+	Depends $(<) : $(>) ;
+	MakeLocate $(<) : $(LOCATE_SOURCE) ;
+	Clean clean : $(<) ;
+}
+
+if ( $(ARDUINO_VERSION) < 100 )
+{
+	ARDUINO_H = WProgram.h ;
+}
+else
+{
+	ARDUINO_H = Arduino.h ;
+}
+
+actions Pde
+{
+	echo "#include <$(ARDUINO_H)>" > $(<) 
+	echo "#line 1 \"$(>)\"" >> $(<)
+	cat $(>) >> $(<) 
+}
+
+rule C++Pde
+{
+	local _CPP = $(>:B).cpp ;
+	Pde $(_CPP) : $(>) ;
+	C++ $(<) : $(_CPP) ;
+}
+
+rule UserObject
+{
+	switch $(>:S)
+	{
+		case .ino : C++Pde $(<) : $(>) ;
+		case .pde : C++Pde $(<) : $(>) ;
+	}
+}
+
+rule Objects
+{
+        local _i ;
+
+        for _i in [ FGristFiles $(<) ]
+        {
+		local _b = $(_i:B)$(SUFOBJ) ;
+		local _o = $(_b:G=$(SOURCE_GRIST:E)) ;
+                Object $(_o) : $(_i) ;
+                Depends obj : $(_o) ;
+        }
+}
+
+rule Library
+{
+	LibraryFromObjects $(<) : $(>:B)$(SUFOBJ) ;
+	Objects $(>) ;
+}
+
+rule Main
+{
+        MainFromObjects $(<) : $(>:B)$(SUFOBJ) ;
+        Objects $(>) ;
+}
+
+rule Hex
+{
+	Depends $(<) : $(>) ;
+	MakeLocate $(<) : $(LOCATE_TARGET) ;
+	Depends hex : $(<) ;
+	Clean clean : $(<) ;
+}
+
+actions Hex
+{
+	$(OBJCOPY) -O ihex -R .eeprom $(>) $(<)
+}
+
+rule Upload
+{
+	Depends $(1) : $(2) ;
+	Depends $(2) : $(3) ;
+	NotFile $(1) ;
+	Always $(1) ;
+	Always $(2) ;
+	UploadAction $(2) : $(3) ;
+}
+
+actions UploadAction
+{
+	$(AVRDUDE) $(AVRDUDEFLAGS) -P $(<) $(AVRDUDE_WRITE_FLASH) -U flash:w:$(>):i
+}
+
+rule Arduino
+{
+	LINKFLAGS on $(<) = $(LINKFLAGS) -Wl,-Map=$(LOCATE_TARGET)/$(<:B).map ;
+	Main $(<) : $(>) ;
+	LinkLibraries $(<) : libs core ;
+	Hex $(<:B).hex : $(<) ;
+	for _p in $(PORTS)
+	{
+		Upload $(_p) : $(PORT_$(_p)) : $(<:B).hex ;
+	}
+}
+
+#
+# Targets
+#
+
+# Grab everything from the core directory
+Library core : [ GLOB $(ARDUINO_CORE) : *.c *.cpp ] ;
+
+# Grab everything from libraries.  To avoid this "grab everything" behaviour, you
+# can specify specific modules to pick up in PROJECT_MODULES
+Library libs : [ GLOB $(ARDUINO_LIB)/$(PROJECT_LIBS) $(ARDUINO_LIB)/$(PROJECT_LIBS)/utility $(SKETCH_LIB)/$(PROJECT_LIBS) : *.cpp *.c ] ;
+
+# Main output executable
+Arduino $(PWD:B).elf : $(PROJECT_MODULES) [ GLOB $(PROJECT_DIRS) : *.c *.cpp *.pde *.ino ] ;

hardware/digistump/avr/libraries/RF24/examples/nordic_fob/nordic_fob.pde

@@ -0,0 +1,142 @@
+/*
+ Copyright (C) 2012 J. Coliz <maniacbug@ymail.com>
+
+ This program is free software; you can redistribute it and/or
+ modify it under the terms of the GNU General Public License
+ version 2 as published by the Free Software Foundation.
+ */
+
+/**
+ * Example Nordic FOB Receiver 
+ *
+ * This is an example of how to use the RF24 class to receive signals from the
+ * Sparkfun Nordic FOB.  Thanks to Kirk Mower for providing test hardware.
+ *
+ * See blog post at http://maniacbug.wordpress.com/2012/01/08/nordic-fob/
+ */
+
+#include <SPI.h>
+#include <RF24.h>
+#include "nRF24L01.h"
+#include "printf.h"
+
+//
+// Hardware configuration
+//
+
+// Set up nRF24L01 radio on SPI bus plus pins 9 & 10
+
+RF24 radio(9,10);
+
+//
+// Payload
+//
+
+struct payload_t
+{
+  uint8_t buttons;
+  uint16_t id;
+  uint8_t empty;
+};
+
+const char* button_names[] = { "Up", "Down", "Left", "Right", "Center" }; 
+const int num_buttons = 5;
+
+//
+// Forward declarations
+//
+
+uint16_t flip_endian(uint16_t in);
+
+//
+// Setup
+//
+
+void setup(void)
+{
+  //
+  // Print preamble
+  //
+
+  Serial.begin(57600);
+  printf_begin();
+  printf("\r\nRF24/examples/nordic_fob/\r\n");
+
+  //
+  // Setup and configure rf radio according to the built-in parameters
+  // of the FOB.
+  //
+
+  radio.begin();
+  radio.setChannel(2);
+  radio.setPayloadSize(4);
+  radio.setAutoAck(false);
+  radio.setCRCLength(RF24_CRC_8);
+  radio.openReadingPipe(1,0xE7E7E7E7E7LL);
+
+  //
+  // Start listening
+  //
+
+  radio.startListening();
+
+  //
+  // Dump the configuration of the rf unit for debugging
+  //
+
+  radio.printDetails();
+}
+
+//
+// Loop
+//
+
+void loop(void)
+{
+  //
+  // Receive each packet, dump it out
+  //
+
+    // if there is data ready
+    if ( radio.available() )
+    {
+      // Get the packet from the radio
+      payload_t payload;
+      radio.read( &payload, sizeof(payload) );
+
+      // Print the ID of this message.  Note that the message
+      // is sent 'big-endian', so we have to flip it.
+      printf("#%05u Buttons ",flip_endian(payload.id));
+
+      // Print the name of each button 
+      int i = num_buttons;
+      while (i--)
+      {
+	if ( ! ( payload.buttons & _BV(i) ) )
+	{
+	  printf("%s ",button_names[i]);
+	}
+      }
+
+      // If no buttons, print None
+      if ( payload.buttons == _BV(num_buttons) - 1 )
+	printf("None");
+
+      printf("\r\n");
+    }
+}
+
+//
+// Helper functions
+//
+
+// Change a big-endian word into a little-endian
+uint16_t flip_endian(uint16_t in)
+{
+  uint16_t low = in >> 8;
+  uint16_t high = in << 8;
+
+  return high | low;
+}
+
+// vim:cin:ai:sts=2 sw=2 ft=cpp

hardware/digistump/avr/libraries/RF24/examples/nordic_fob/printf.h

@@ -0,0 +1,37 @@
+/*
+ Copyright (C) 2011 J. Coliz <maniacbug@ymail.com>
+ 
+ This program is free software; you can redistribute it and/or
+ modify it under the terms of the GNU General Public License
+ version 2 as published by the Free Software Foundation.
+ */
+ 
+/**
+ * @file printf.h
+ *
+ * Setup necessary to direct stdout to the Arduino Serial library, which
+ * enables 'printf'
+ */
+
+#ifndef __PRINTF_H__
+#define __PRINTF_H__
+
+#ifdef ARDUINO
+
+int serial_putc( char c, FILE * ) 
+{
+  Serial.write( c );
+
+  return c;
+} 
+
+void printf_begin(void)
+{
+  fdevopen( &serial_putc, 0 );
+}
+
+#else
+#error This example is only for use on Arduino.
+#endif // ARDUINO
+
+#endif // __PRINTF_H__

hardware/digistump/avr/libraries/RF24/examples/pingpair/Jamfile

@@ -0,0 +1,219 @@
+# (1) Project Information
+
+PROJECT_LIBS 	= SPI RF24 ; 
+PROJECT_DIRS	= $(PWD) ;
+
+# (2) Board Information
+
+UPLOAD_PROTOCOL ?= arduino ;
+UPLOAD_SPEED 	?= 115200 ;
+MCU		?= atmega328p ;
+F_CPU 		?= 16000000 ;
+CORE		?= arduino ;
+VARIANT 	?= standard ;
+ARDUINO_VERSION	?= 100 ;
+
+# (3) USB Ports
+
+PORTS		= p4 p6 p9 u0 u1 u2 ;
+PORT_p6 	= /dev/tty.usbserial-A600eHIs ;
+PORT_p4 	= /dev/tty.usbserial-A40081RP ;
+PORT_p9		= /dev/tty.usbserial-A9007LmI ;
+PORT_u0 	= /dev/ttyUSB0 ;
+PORT_u1 	= /dev/ttyUSB1 ;
+PORT_u2 	= /dev/ttyUSB2 ;
+
+# (4) Location of AVR tools
+#
+# This configuration assumes using avr-tools that were obtained separate from the Arduino
+# distribution. 
+
+if $(OS) = MACOSX 
+{
+	AVR_BIN 	?= /usr/local/avrtools/bin ;
+	AVR_ETC 	= /usr/local/avrtools/etc ;
+	AVR_INCLUDE	= /usr/local/avrtools/include ; 
+}
+else
+{
+	AVR_BIN 	?= /usr/bin ;
+	AVR_INCLUDE 	= /usr/lib/avr/include ;
+	AVR_ETC 	= /etc ; 
+}
+
+# (5) Directories where Arduino core and libraries are located
+
+ARDUINO_DIR 	?= /opt/Arduino ;
+ARDUINO_CORE 	= $(ARDUINO_DIR)/hardware/arduino/cores/$(CORE) $(ARDUINO_DIR)/hardware/arduino/variants/$(VARIANT) ;
+ARDUINO_LIB 	= $(ARDUINO_DIR)/libraries ;
+SKETCH_LIB      = $(HOME)/Source/Arduino/libraries ;
+
+#
+# --------------------------------------------------
+# Below this line usually never needs to be modified 
+#
+
+# Tool locations
+
+CC	  	= $(AVR_BIN)/avr-gcc ;
+C++	 	= $(AVR_BIN)/avr-g++ ;
+LINK	  	= $(AVR_BIN)/avr-gcc ;
+AR		= $(AVR_BIN)/avr-ar rcs ;
+RANLIB		= ;
+OBJCOPY 	= $(AVR_BIN)/avr-objcopy ;
+AVRDUDE 	?= $(AVR_BIN)/avrdude ;
+
+# Flags
+
+DEFINES  	+= F_CPU=$(F_CPU)L ARDUINO=$(ARDUINO_VERSION) VERSION_H ;
+OPTIM		= -Os ;
+CCFLAGS  	= -Wall -Wextra -Wno-strict-aliasing -mmcu=$(MCU) -ffunction-sections -fdata-sections ;
+C++FLAGS  	= $(CCFLAGS) -fno-exceptions -fno-strict-aliasing ;
+LINKFLAGS  	= $(OPTIM) -lm -Wl,--gc-sections -mmcu=$(MCU) ;
+AVRDUDEFLAGS	= -V -F -D -C $(AVR_ETC)/avrdude.conf -p $(MCU) -c $(UPLOAD_PROTOCOL) -b $(UPLOAD_SPEED) ;
+
+# Search everywhere for headers
+
+HDRS  	 	= $(PROJECT_DIRS) $(AVR_INCLUDE) $(ARDUINO_CORE) $(ARDUINO_LIB)/$(PROJECT_LIBS) $(ARDUINO_LIB)/$(PROJECT_LIBS)/utility $(SKETCH_LIB)/$(PROJECT_LIBS) ;
+
+# Output locations
+
+LOCATE_TARGET	= $(F_CPU) ;
+LOCATE_SOURCE	= $(F_CPU) ;
+
+#
+# Custom rules
+#
+
+rule GitVersion
+{
+	Always $(<) ;
+	Depends all : $(<) ;
+}
+
+actions GitVersion
+{
+	echo "const char program_version[] = \"\\" > $(<)
+	git log -1 --pretty=format:%h >> $(<)
+	echo "\";" >> $(<)
+}
+
+GitVersion version.h ;
+
+rule Pde
+{
+	Depends $(<) : $(>) ;
+	MakeLocate $(<) : $(LOCATE_SOURCE) ;
+	Clean clean : $(<) ;
+}
+
+if ( $(ARDUINO_VERSION) < 100 )
+{
+	ARDUINO_H = WProgram.h ;
+}
+else
+{
+	ARDUINO_H = Arduino.h ;
+}
+
+actions Pde
+{
+	echo "#include <$(ARDUINO_H)>" > $(<) 
+	echo "#line 1 \"$(>)\"" >> $(<)
+	cat $(>) >> $(<) 
+}
+
+rule C++Pde
+{
+	local _CPP = $(>:B).cpp ;
+	Pde $(_CPP) : $(>) ;
+	C++ $(<) : $(_CPP) ;
+}
+
+rule UserObject
+{
+	switch $(>:S)
+	{
+		case .ino : C++Pde $(<) : $(>) ;
+		case .pde : C++Pde $(<) : $(>) ;
+	}
+}
+
+rule Objects
+{
+        local _i ;
+
+        for _i in [ FGristFiles $(<) ]
+        {
+		local _b = $(_i:B)$(SUFOBJ) ;
+		local _o = $(_b:G=$(SOURCE_GRIST:E)) ;
+                Object $(_o) : $(_i) ;
+                Depends obj : $(_o) ;
+        }
+}
+
+rule Library
+{
+	LibraryFromObjects $(<) : $(>:B)$(SUFOBJ) ;
+	Objects $(>) ;
+}
+
+rule Main
+{
+        MainFromObjects $(<) : $(>:B)$(SUFOBJ) ;
+        Objects $(>) ;
+}
+
+rule Hex
+{
+	Depends $(<) : $(>) ;
+	MakeLocate $(<) : $(LOCATE_TARGET) ;
+	Depends hex : $(<) ;
+	Clean clean : $(<) ;
+}
+
+actions Hex
+{
+	$(OBJCOPY) -O ihex -R .eeprom $(>) $(<)
+}
+
+rule Upload
+{
+	Depends $(1) : $(2) ;
+	Depends $(2) : $(3) ;
+	NotFile $(1) ;
+	Always $(1) ;
+	Always $(2) ;
+	UploadAction $(2) : $(3) ;
+}
+
+actions UploadAction
+{
+	$(AVRDUDE) $(AVRDUDEFLAGS) -P $(<) $(AVRDUDE_WRITE_FLASH) -U flash:w:$(>):i
+}
+
+rule Arduino
+{
+	LINKFLAGS on $(<) = $(LINKFLAGS) -Wl,-Map=$(LOCATE_TARGET)/$(<:B).map ;
+	Main $(<) : $(>) ;
+	LinkLibraries $(<) : core libs ;
+	Hex $(<:B).hex : $(<) ;
+	for _p in $(PORTS)
+	{
+		Upload $(_p) : $(PORT_$(_p)) : $(<:B).hex ;
+	}
+}
+
+#
+# Targets
+#
+
+# Grab everything from the core directory
+Library core : [ GLOB $(ARDUINO_CORE) : *.c *.cpp ] ;
+
+# Grab everything from libraries.  To avoid this "grab everything" behaviour, you
+# can specify specific modules to pick up in PROJECT_MODULES
+Library libs : [ GLOB $(ARDUINO_LIB)/$(PROJECT_LIBS) $(ARDUINO_LIB)/$(PROJECT_LIBS)/utility $(SKETCH_LIB)/$(PROJECT_LIBS) : *.cpp *.c ] ;
+
+# Main output executable
+Arduino $(PWD:B).elf : $(PROJECT_MODULES) [ GLOB $(PROJECT_DIRS) : *.c *.cpp *.pde *.ino ] ;

hardware/digistump/avr/libraries/RF24/examples/pingpair/pingpair.pde

@@ -0,0 +1,220 @@
+/*
+ Copyright (C) 2011 J. Coliz <maniacbug@ymail.com>
+
+ This program is free software; you can redistribute it and/or
+ modify it under the terms of the GNU General Public License
+ version 2 as published by the Free Software Foundation.
+ */
+
+/**
+ * Example RF Radio Ping Pair
+ *
+ * This is an example of how to use the RF24 class.  Write this sketch to two different nodes,
+ * connect the role_pin to ground on one.  The ping node sends the current time to the pong node,
+ * which responds by sending the value back.  The ping node can then see how long the whole cycle
+ * took.
+ */
+
+#include <SPI.h>
+#include "nRF24L01.h"
+#include "RF24.h"
+#include "printf.h"
+
+//
+// Hardware configuration
+//
+
+// Set up nRF24L01 radio on SPI bus plus pins 9 & 10
+
+RF24 radio(9,10);
+
+// sets the role of this unit in hardware.  Connect to GND to be the 'pong' receiver
+// Leave open to be the 'ping' transmitter
+const int role_pin = 7;
+
+//
+// Topology
+//
+
+// Radio pipe addresses for the 2 nodes to communicate.
+const uint64_t pipes[2] = { 0xF0F0F0F0E1LL, 0xF0F0F0F0D2LL };
+
+//
+// Role management
+//
+// Set up role.  This sketch uses the same software for all the nodes
+// in this system.  Doing so greatly simplifies testing.  The hardware itself specifies
+// which node it is.
+//
+// This is done through the role_pin
+//
+
+// The various roles supported by this sketch
+typedef enum { role_ping_out = 1, role_pong_back } role_e;
+
+// The debug-friendly names of those roles
+const char* role_friendly_name[] = { "invalid", "Ping out", "Pong back"};
+
+// The role of the current running sketch
+role_e role;
+
+void setup(void)
+{
+  //
+  // Role
+  //
+
+  // set up the role pin
+  pinMode(role_pin, INPUT);
+  digitalWrite(role_pin,HIGH);
+  delay(20); // Just to get a solid reading on the role pin
+
+  // read the address pin, establish our role
+  if ( ! digitalRead(role_pin) )
+    role = role_ping_out;
+  else
+    role = role_pong_back;
+
+  //
+  // Print preamble
+  //
+
+  Serial.begin(57600);
+  printf_begin();
+  printf("\n\rRF24/examples/pingpair/\n\r");
+  printf("ROLE: %s\n\r",role_friendly_name[role]);
+
+  //
+  // Setup and configure rf radio
+  //
+
+  radio.begin();
+
+  // optionally, increase the delay between retries & # of retries
+  radio.setRetries(15,15);
+
+  // optionally, reduce the payload size.  seems to
+  // improve reliability
+  radio.setPayloadSize(8);
+
+  //
+  // Open pipes to other nodes for communication
+  //
+
+  // This simple sketch opens two pipes for these two nodes to communicate
+  // back and forth.
+  // Open 'our' pipe for writing
+  // Open the 'other' pipe for reading, in position #1 (we can have up to 5 pipes open for reading)
+
+  if ( role == role_ping_out )
+  {
+    radio.openWritingPipe(pipes[0]);
+    radio.openReadingPipe(1,pipes[1]);
+  }
+  else
+  {
+    radio.openWritingPipe(pipes[1]);
+    radio.openReadingPipe(1,pipes[0]);
+  }
+
+  //
+  // Start listening
+  //
+
+  radio.startListening();
+
+  //
+  // Dump the configuration of the rf unit for debugging
+  //
+
+  radio.printDetails();
+}
+
+void loop(void)
+{
+  //
+  // Ping out role.  Repeatedly send the current time
+  //
+
+  if (role == role_ping_out)
+  {
+    // First, stop listening so we can talk.
+    radio.stopListening();
+
+    // Take the time, and send it.  This will block until complete
+    unsigned long time = millis();
+    printf("Now sending %lu...",time);
+    bool ok = radio.write( &time, sizeof(unsigned long) );
+    
+    if (ok)
+      printf("ok...");
+    else
+      printf("failed.\n\r");
+
+    // Now, continue listening
+    radio.startListening();
+
+    // Wait here until we get a response, or timeout (250ms)
+    unsigned long started_waiting_at = millis();
+    bool timeout = false;
+    while ( ! radio.available() && ! timeout )
+      if (millis() - started_waiting_at > 200 )
+        timeout = true;
+
+    // Describe the results
+    if ( timeout )
+    {
+      printf("Failed, response timed out.\n\r");
+    }
+    else
+    {
+      // Grab the response, compare, and send to debugging spew
+      unsigned long got_time;
+      radio.read( &got_time, sizeof(unsigned long) );
+
+      // Spew it
+      printf("Got response %lu, round-trip delay: %lu\n\r",got_time,millis()-got_time);
+    }
+
+    // Try again 1s later
+    delay(1000);
+  }
+
+  //
+  // Pong back role.  Receive each packet, dump it out, and send it back
+  //
+
+  if ( role == role_pong_back )
+  {
+    // if there is data ready
+    if ( radio.available() )
+    {
+      // Dump the payloads until we've gotten everything
+      unsigned long got_time;
+      bool done = false;
+      while (!done)
+      {
+        // Fetch the payload, and see if this was the last one.
+        done = radio.read( &got_time, sizeof(unsigned long) );
+
+        // Spew it
+        printf("Got payload %lu...",got_time);
+
+	// Delay just a little bit to let the other unit
+	// make the transition to receiver
+	delay(20);
+      }
+
+      // First, stop listening so we can talk
+      radio.stopListening();
+
+      // Send the final one back.
+      radio.write( &got_time, sizeof(unsigned long) );
+      printf("Sent response.\n\r");
+
+      // Now, resume listening so we catch the next packets.
+      radio.startListening();
+    }
+  }
+}
+// vim:cin:ai:sts=2 sw=2 ft=cpp

hardware/digistump/avr/libraries/RF24/examples/pingpair/printf.h

@@ -0,0 +1,37 @@
+/*
+ Copyright (C) 2011 J. Coliz <maniacbug@ymail.com>
+ 
+ This program is free software; you can redistribute it and/or
+ modify it under the terms of the GNU General Public License
+ version 2 as published by the Free Software Foundation.
+ */
+ 
+/**
+ * @file printf.h
+ *
+ * Setup necessary to direct stdout to the Arduino Serial library, which
+ * enables 'printf'
+ */
+
+#ifndef __PRINTF_H__
+#define __PRINTF_H__
+
+#ifdef ARDUINO
+
+int serial_putc( char c, FILE * ) 
+{
+  Serial.write( c );
+
+  return c;
+} 
+
+void printf_begin(void)
+{
+  fdevopen( &serial_putc, 0 );
+}
+
+#else
+#error This example is only for use on Arduino.
+#endif // ARDUINO
+
+#endif // __PRINTF_H__

hardware/digistump/avr/libraries/RF24/examples/pingpair_dyn/Jamfile

@@ -0,0 +1,206 @@
+PROJECT_NAME 	= $(PWD:B) ;
+PROJECT_DIR 	= . ;
+PROJECT_LIBS = SPI RF24 ; 
+
+OUT_DIR = ojam ;
+F_CPU 		= 16000000 ;
+MCU             = atmega328p ;
+PORTS           = /dev/tty.usbserial-A600eHIs /dev/tty.usbserial-A40081RP /dev/tty.usbserial-A9007LmI ;
+
+UPLOAD_RATE 	= 57600 ;
+AVRDUDE_PROTOCOL = stk500v1 ;
+COM 		= 33 ;
+
+# Host-specific overrides for locations 
+if $(OS) = MACOSX 
+{
+ARDUINO_VERSION	= 22 ;
+OLD_DIR 	= /opt/arduino-0021 ;
+AVR_TOOLS_PATH 	= $(OLD_DIR)/hardware/tools/avr/bin ;
+AVRDUDECONFIG_PATH = $(OLD_DIR)/hardware/tools/avr/etc ;
+ARDUINO_DIR 	= /opt/Arduino ;
+ARDUINO_AVR 	= /usr/lib/avr/include ;
+}
+
+# Where is everything?
+ARDUINO_VERSION	?= 22 ;
+AVR_TOOLS_PATH 	?= /usr/bin ;
+ARDUINO_DIR 	?= /opt/arduino-00$(ARDUINO_VERSION) ;
+ARDUINO_AVR 	?= $(ARDUINO_DIR)/hardware/tools/avr/avr/include/avr ;
+AVRDUDECONFIG_PATH ?= $(ARDUINO_DIR)/hardware/tools ;
+ARDUINO_CORE 	= $(ARDUINO_DIR)/hardware/arduino/cores/arduino ;
+ARDUINO_LIB 	= $(ARDUINO_DIR)/libraries ;
+SKETCH_LIB      = $(HOME)/Source/Arduino/libraries ;
+AVR_CC  	= $(AVR_TOOLS_PATH)/avr-gcc ;
+AVR_CXX  	= $(AVR_TOOLS_PATH)/avr-g++ ;
+AVR_LD  	= $(AVR_TOOLS_PATH)/avr-gcc ;
+AVR_OBJCOPY 	= $(AVR_TOOLS_PATH)/avr-objcopy ;
+AVRDUDE 	= $(AVR_TOOLS_PATH)/avrdude ;
+
+DEFINES  	= F_CPU=$(F_CPU)L ARDUINO=$(ARDUINO_VERSION) VERSION_H ;
+CTUNING  	= -ffunction-sections -fdata-sections ;
+CXXTUNING  	= -fno-exceptions -fno-strict-aliasing ; 
+CFLAGS  	= -Os -Wall -Wextra -mmcu=$(MCU) $(CTUNING) ;
+CXXFLAGS  	= $(CFLAGS) $(CXXTUNING) ;
+LDFLAGS  	= -Os -lm -Wl,--gc-sections -mmcu=atmega328p ;
+
+# Search everywhere for headers
+HDRS  	 	= $(PROJECT_DIR) $(ARDUINO_AVR) $(ARDUINO_CORE) [ GLOB $(ARDUINO_LIB) $(SKETCH_LIB) : [^.]* ] ;
+
+# Grab everything from the core directory
+CORE_MODULES  	= [ GLOB $(ARDUINO_CORE) : *.c *.cpp ] ;
+
+# Grab everything from libraries.  To avoid this "grab everything" behaviour, you
+# can specify specific modules to pick up in PROJECT_MODULES
+LIB_MODULES  	= [ GLOB $(ARDUINO_LIB)/$(PROJECT_LIBS) $(SKETCH_LIB)/$(PROJECT_LIBS) : *.cpp ] ;
+
+# In addition to explicitly-specified program modules, pick up anything from the current
+# dir.
+PROJECT_MODULES += [ GLOB $(PROJECT_DIR) : *.c *.cpp *.pde ] ;
+
+# Shortcut for the out files
+OUT             = $(OUT_DIR)/$(PROJECT_NAME) ;
+
+# AvrDude setup
+AVRDUDE_FLAGS = -V -F -D -C $(AVRDUDECONFIG_PATH)/avrdude.conf -p $(MCU) -c $(AVRDUDE_PROTOCOL) -b $(UPLOAD_RATE) ;
+
+rule GitVersion
+{
+  Always $(<) ;
+  Depends all : $(<) ;
+}
+
+actions GitVersion
+{
+  echo "const char program_version[] = \"\\" > $(<)
+  git log -1 --pretty=format:%h >> $(<)
+  echo "\";" >> $(<)
+}
+
+GitVersion version.h ;
+
+rule AvrCc
+{
+  Depends $(<) : $(>) ;
+  Depends $(<) : $(<:D) ;
+  Clean clean : $(<) ;
+
+  CCHDRS on $(<) = [ on $(<) FIncludes $(HDRS) ] ;
+  CCDEFS on $(<) = [ on $(<) FDefines $(DEFINES) ] ;
+}
+
+actions AvrCc
+{
+  $(AVR_CC) -c -o $(<) $(CCHDRS) $(CCDEFS) $(CFLAGS) $(>) 
+}
+
+rule AvrC++
+{
+  Depends $(<) : $(>) ;
+  Depends $(<) : $(<:D) ;
+  Clean clean : $(<) ;
+
+  CCHDRS on $(<) = [ on $(<) FIncludes $(HDRS) ] ;
+  CCDEFS on $(<) = [ on $(<) FDefines $(DEFINES) ] ;
+}
+
+actions AvrC++
+{
+  $(AVR_CXX) -c -o $(<) $(CCHDRS) $(CCDEFS) $(CXXFLAGS) $(>) 
+}
+
+rule Pde
+{
+  Depends $(<) : $(>) ;
+  Depends $(<) : $(<:D) ;
+  Clean clean : $(<) ;
+
+}
+
+actions Pde
+{
+  echo "#include <WProgram.h>" > $(<) 
+  echo "#line 1 \"$(>)\"" >> $(<)
+  cat $(>) >> $(<) 
+}
+
+rule AvrPde
+{
+  local _CPP = $(OUT_DIR)/$(_I:B).cpp ;
+  Pde $(_CPP) : $(>) ;
+  AvrC++ $(<) : $(_CPP) ;
+}
+
+rule AvrObject
+{
+  switch $(>:S)
+  {
+    case .c :   AvrCc $(<) : $(>) ;
+    case .cpp : AvrC++ $(<) : $(>) ;
+    case .pde : AvrPde $(<) : $(>) ;
+  }
+}
+
+rule AvrObjects
+{
+  for _I in $(<) 
+  {
+    AvrObject $(OUT_DIR)/$(_I:B).o : $(_I) ;
+  }
+}
+
+rule AvrMainFromObjects
+{
+  Depends $(<) : $(>) ;
+  Depends $(<) : $(<:D) ;
+  MkDir $(<:D) ;
+  Depends all : $(<) ;
+  Clean clean : $(<) ;
+}
+
+actions AvrMainFromObjects
+{
+  $(AVR_LD) $(LDFLAGS) -o $(<) $(>) 
+}
+
+rule AvrMain
+{
+  AvrMainFromObjects $(<) : $(OUT_DIR)/$(>:B).o ;
+  AvrObjects $(>) ;
+}
+
+rule AvrHex
+{
+  Depends $(<) : $(>) ;
+  Depends $(<) : $(<:D) ;
+  Depends hex : $(<) ;
+  Clean clean : $(<) ;
+}
+
+actions AvrHex
+{
+  $(AVR_OBJCOPY) -O ihex -R .eeprom $(>) $(<)
+}
+
+rule AvrUpload
+{
+  Depends $(1) : $(2) ;
+  Depends $(2) : $(3) ;
+  NotFile $(1) ;
+  Always $(1) ;
+  Always $(2) ;
+  AvrUploadAction $(2) : $(3) ;
+}
+
+actions AvrUploadAction
+{
+  $(AVRDUDE) $(AVRDUDE_FLAGS) -P $(<) $(AVRDUDE_WRITE_FLASH) -U flash:w:$(>):i
+}
+
+AvrMain $(OUT).elf : $(CORE_MODULES) $(LIB_MODULES) $(PROJECT_MODULES) ;
+AvrHex $(OUT).hex : $(OUT).elf ;
+
+AvrUpload p6 : /dev/tty.usbserial-A600eHIs : $(OUT).hex ;
+AvrUpload p4 : /dev/tty.usbserial-A40081RP : $(OUT).hex ;
+AvrUpload p9 : /dev/tty.usbserial-A9007LmI : $(OUT).hex ;
+

hardware/digistump/avr/libraries/RF24/examples/pingpair_dyn/pingpair_dyn.pde

@@ -0,0 +1,232 @@
+/*
+ Copyright (C) 2011 J. Coliz <maniacbug@ymail.com>
+
+ This program is free software; you can redistribute it and/or
+ modify it under the terms of the GNU General Public License
+ version 2 as published by the Free Software Foundation.
+ */
+
+/**
+ * Example using Dynamic Payloads 
+ *
+ * This is an example of how to use payloads of a varying (dynamic) size. 
+ */
+
+#include <SPI.h>
+#include "nRF24L01.h"
+#include "RF24.h"
+#include "printf.h"
+
+//
+// Hardware configuration
+//
+
+// Set up nRF24L01 radio on SPI bus plus pins 9 & 10
+
+RF24 radio(9,10);
+
+// sets the role of this unit in hardware.  Connect to GND to be the 'pong' receiver
+// Leave open to be the 'ping' transmitter
+const int role_pin = 7;
+
+//
+// Topology
+//
+
+// Radio pipe addresses for the 2 nodes to communicate.
+const uint64_t pipes[2] = { 0xF0F0F0F0E1LL, 0xF0F0F0F0D2LL };
+
+//
+// Role management
+//
+// Set up role.  This sketch uses the same software for all the nodes
+// in this system.  Doing so greatly simplifies testing.  The hardware itself specifies
+// which node it is.
+//
+// This is done through the role_pin
+//
+
+// The various roles supported by this sketch
+typedef enum { role_ping_out = 1, role_pong_back } role_e;
+
+// The debug-friendly names of those roles
+const char* role_friendly_name[] = { "invalid", "Ping out", "Pong back"};
+
+// The role of the current running sketch
+role_e role;
+
+//
+// Payload
+//
+
+const int min_payload_size = 4;
+const int max_payload_size = 32;
+const int payload_size_increments_by = 2;
+int next_payload_size = min_payload_size;
+
+char receive_payload[max_payload_size+1]; // +1 to allow room for a terminating NULL char
+
+void setup(void)
+{
+  //
+  // Role
+  //
+
+  // set up the role pin
+  pinMode(role_pin, INPUT);
+  digitalWrite(role_pin,HIGH);
+  delay(20); // Just to get a solid reading on the role pin
+
+  // read the address pin, establish our role
+  if ( digitalRead(role_pin) )
+    role = role_ping_out;
+  else
+    role = role_pong_back;
+
+  //
+  // Print preamble
+  //
+
+  Serial.begin(57600);
+  printf_begin();
+  printf("\n\rRF24/examples/pingpair_dyn/\n\r");
+  printf("ROLE: %s\n\r",role_friendly_name[role]);
+
+  //
+  // Setup and configure rf radio
+  //
+
+  radio.begin();
+
+  // enable dynamic payloads
+  radio.enableDynamicPayloads();
+
+  // optionally, increase the delay between retries & # of retries
+  radio.setRetries(15,15);
+
+  //
+  // Open pipes to other nodes for communication
+  //
+
+  // This simple sketch opens two pipes for these two nodes to communicate
+  // back and forth.
+  // Open 'our' pipe for writing
+  // Open the 'other' pipe for reading, in position #1 (we can have up to 5 pipes open for reading)
+
+  if ( role == role_ping_out )
+  {
+    radio.openWritingPipe(pipes[0]);
+    radio.openReadingPipe(1,pipes[1]);
+  }
+  else
+  {
+    radio.openWritingPipe(pipes[1]);
+    radio.openReadingPipe(1,pipes[0]);
+  }
+
+  //
+  // Start listening
+  //
+
+  radio.startListening();
+
+  //
+  // Dump the configuration of the rf unit for debugging
+  //
+
+  radio.printDetails();
+}
+
+void loop(void)
+{
+  //
+  // Ping out role.  Repeatedly send the current time
+  //
+
+  if (role == role_ping_out)
+  {
+    // The payload will always be the same, what will change is how much of it we send.
+    static char send_payload[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ789012";
+
+    // First, stop listening so we can talk.
+    radio.stopListening();
+
+    // Take the time, and send it.  This will block until complete
+    printf("Now sending length %i...",next_payload_size);
+    radio.write( send_payload, next_payload_size );
+
+    // Now, continue listening
+    radio.startListening();
+
+    // Wait here until we get a response, or timeout
+    unsigned long started_waiting_at = millis();
+    bool timeout = false;
+    while ( ! radio.available() && ! timeout )
+      if (millis() - started_waiting_at > 500 )
+        timeout = true;
+
+    // Describe the results
+    if ( timeout )
+    {
+      printf("Failed, response timed out.\n\r");
+    }
+    else
+    {
+      // Grab the response, compare, and send to debugging spew
+      uint8_t len = radio.getDynamicPayloadSize();
+      radio.read( receive_payload, len );
+
+      // Put a zero at the end for easy printing
+      receive_payload[len] = 0;
+
+      // Spew it
+      printf("Got response size=%i value=%s\n\r",len,receive_payload);
+    }
+    
+    // Update size for next time.
+    next_payload_size += payload_size_increments_by;
+    if ( next_payload_size > max_payload_size )
+      next_payload_size = min_payload_size;
+
+    // Try again 1s later
+    delay(1000);
+  }
+
+  //
+  // Pong back role.  Receive each packet, dump it out, and send it back
+  //
+
+  if ( role == role_pong_back )
+  {
+    // if there is data ready
+    if ( radio.available() )
+    {
+      // Dump the payloads until we've gotten everything
+      uint8_t len;
+      bool done = false;
+      while (!done)
+      {
+        // Fetch the payload, and see if this was the last one.
+	len = radio.getDynamicPayloadSize();
+	done = radio.read( receive_payload, len );
+
+	// Put a zero at the end for easy printing
+	receive_payload[len] = 0;
+
+	// Spew it
+	printf("Got payload size=%i value=%s\n\r",len,receive_payload);
+      }
+
+      // First, stop listening so we can talk
+      radio.stopListening();
+
+      // Send the final one back.
+      radio.write( receive_payload, len );
+      printf("Sent response.\n\r");
+
+      // Now, resume listening so we catch the next packets.
+      radio.startListening();
+    }
+  }
+}
+// vim:cin:ai:sts=2 sw=2 ft=cpp

hardware/digistump/avr/libraries/RF24/examples/pingpair_dyn/printf.h

@@ -0,0 +1,37 @@
+/*
+ Copyright (C) 2011 J. Coliz <maniacbug@ymail.com>
+ 
+ This program is free software; you can redistribute it and/or
+ modify it under the terms of the GNU General Public License
+ version 2 as published by the Free Software Foundation.
+ */
+ 
+/**
+ * @file printf.h
+ *
+ * Setup necessary to direct stdout to the Arduino Serial library, which
+ * enables 'printf'
+ */
+
+#ifndef __PRINTF_H__
+#define __PRINTF_H__
+
+#ifdef ARDUINO
+
+int serial_putc( char c, FILE * ) 
+{
+  Serial.write( c );
+
+  return c;
+} 
+
+void printf_begin(void)
+{
+  fdevopen( &serial_putc, 0 );
+}
+
+#else
+#error This example is only for use on Arduino.
+#endif // ARDUINO
+
+#endif // __PRINTF_H__

hardware/digistump/avr/libraries/RF24/examples/pingpair_irq/Jamfile

@@ -0,0 +1,219 @@
+# (1) Project Information
+
+PROJECT_LIBS 	= SPI RF24 ; 
+PROJECT_DIRS	= $(PWD) ;
+
+# (2) Board Information
+
+UPLOAD_PROTOCOL ?= arduino ;
+UPLOAD_SPEED 	?= 115200 ;
+MCU		?= atmega328p ;
+F_CPU 		?= 16000000 ;
+CORE		?= arduino ;
+VARIANT 	?= standard ;
+ARDUINO_VERSION	?= 100 ;
+
+# (3) USB Ports
+
+PORTS		= p4 p6 p9 u0 u1 u2 ;
+PORT_p6 	= /dev/tty.usbserial-A600eHIs ;
+PORT_p4 	= /dev/tty.usbserial-A40081RP ;
+PORT_p9		= /dev/tty.usbserial-A9007LmI ;
+PORT_u0 	= /dev/ttyUSB0 ;
+PORT_u1 	= /dev/ttyUSB1 ;
+PORT_u2 	= /dev/ttyUSB2 ;
+
+# (4) Location of AVR tools
+#
+# This configuration assumes using avr-tools that were obtained separate from the Arduino
+# distribution. 
+
+if $(OS) = MACOSX 
+{
+	AVR_BIN 	?= /usr/local/avrtools/bin ;
+	AVR_ETC 	= /usr/local/avrtools/etc ;
+	AVR_INCLUDE	= /usr/local/avrtools/include ; 
+}
+else
+{
+	AVR_BIN 	?= /usr/bin ;
+	AVR_INCLUDE 	?= /usr/lib/avr/include ;
+	AVR_ETC 	= /etc ; 
+}
+
+# (5) Directories where Arduino core and libraries are located
+
+ARDUINO_DIR 	?= /opt/Arduino ;
+ARDUINO_CORE 	= $(ARDUINO_DIR)/hardware/arduino/cores/$(CORE) $(ARDUINO_DIR)/hardware/arduino/variants/$(VARIANT) ;
+ARDUINO_LIB 	= $(ARDUINO_DIR)/libraries ;
+SKETCH_LIB      = $(HOME)/Source/Arduino/libraries ;
+
+#
+# --------------------------------------------------
+# Below this line usually never needs to be modified 
+#
+
+# Tool locations
+
+CC	  	= $(AVR_BIN)/avr-gcc ;
+C++	 	= $(AVR_BIN)/avr-g++ ;
+LINK	  	= $(AVR_BIN)/avr-gcc ;
+AR		= $(AVR_BIN)/avr-ar rcs ;
+RANLIB		= ;
+OBJCOPY 	= $(AVR_BIN)/avr-objcopy ;
+AVRDUDE 	?= $(AVR_BIN)/avrdude ;
+
+# Flags
+
+DEFINES  	+= F_CPU=$(F_CPU)L ARDUINO=$(ARDUINO_VERSION) VERSION_H ;
+OPTIM		= -Os ;
+CCFLAGS  	= -Wall -Wextra -Wno-strict-aliasing -mmcu=$(MCU) -ffunction-sections -fdata-sections ;
+C++FLAGS  	= $(CCFLAGS) -fno-exceptions -fno-strict-aliasing ;
+LINKFLAGS  	= $(OPTIM) -lm -Wl,--gc-sections -mmcu=$(MCU) ;
+AVRDUDEFLAGS	= -V -F -D -C $(AVR_ETC)/avrdude.conf -p $(MCU) -c $(UPLOAD_PROTOCOL) -b $(UPLOAD_SPEED) ;
+
+# Search everywhere for headers
+
+HDRS  	 	= $(PROJECT_DIRS) $(AVR_INCLUDE) $(ARDUINO_CORE) $(ARDUINO_LIB)/$(PROJECT_LIBS) $(ARDUINO_LIB)/$(PROJECT_LIBS)/utility $(SKETCH_LIB)/$(PROJECT_LIBS) ;
+
+# Output locations
+
+LOCATE_TARGET	= $(F_CPU) ;
+LOCATE_SOURCE	= $(F_CPU) ;
+
+#
+# Custom rules
+#
+
+rule GitVersion
+{
+	Always $(<) ;
+	Depends all : $(<) ;
+}
+
+actions GitVersion
+{
+	echo "const char program_version[] = \"\\" > $(<)
+	git log -1 --pretty=format:%h >> $(<)
+	echo "\";" >> $(<)
+}
+
+GitVersion version.h ;
+
+rule Pde
+{
+	Depends $(<) : $(>) ;
+	MakeLocate $(<) : $(LOCATE_SOURCE) ;
+	Clean clean : $(<) ;
+}
+
+if ( $(ARDUINO_VERSION) < 100 )
+{
+	ARDUINO_H = WProgram.h ;
+}
+else
+{
+	ARDUINO_H = Arduino.h ;
+}
+
+actions Pde
+{
+	echo "#include <$(ARDUINO_H)>" > $(<) 
+	echo "#line 1 \"$(>)\"" >> $(<)
+	cat $(>) >> $(<) 
+}
+
+rule C++Pde
+{
+	local _CPP = $(>:B).cpp ;
+	Pde $(_CPP) : $(>) ;
+	C++ $(<) : $(_CPP) ;
+}
+
+rule UserObject
+{
+	switch $(>:S)
+	{
+		case .ino : C++Pde $(<) : $(>) ;
+		case .pde : C++Pde $(<) : $(>) ;
+	}
+}
+
+rule Objects
+{
+        local _i ;
+
+        for _i in [ FGristFiles $(<) ]
+        {
+		local _b = $(_i:B)$(SUFOBJ) ;
+		local _o = $(_b:G=$(SOURCE_GRIST:E)) ;
+                Object $(_o) : $(_i) ;
+                Depends obj : $(_o) ;
+        }
+}
+
+rule Library
+{
+	LibraryFromObjects $(<) : $(>:B)$(SUFOBJ) ;
+	Objects $(>) ;
+}
+
+rule Main
+{
+        MainFromObjects $(<) : $(>:B)$(SUFOBJ) ;
+        Objects $(>) ;
+}
+
+rule Hex
+{
+	Depends $(<) : $(>) ;
+	MakeLocate $(<) : $(LOCATE_TARGET) ;
+	Depends hex : $(<) ;
+	Clean clean : $(<) ;
+}
+
+actions Hex
+{
+	$(OBJCOPY) -O ihex -R .eeprom $(>) $(<)
+}
+
+rule Upload
+{
+	Depends $(1) : $(2) ;
+	Depends $(2) : $(3) ;
+	NotFile $(1) ;
+	Always $(1) ;
+	Always $(2) ;
+	UploadAction $(2) : $(3) ;
+}
+
+actions UploadAction
+{
+	$(AVRDUDE) $(AVRDUDEFLAGS) -P $(<) $(AVRDUDE_WRITE_FLASH) -U flash:w:$(>):i
+}
+
+rule Arduino
+{
+	LINKFLAGS on $(<) = $(LINKFLAGS) -Wl,-Map=$(LOCATE_TARGET)/$(<:B).map ;
+	Main $(<) : $(>) ;
+	LinkLibraries $(<) : core libs ;
+	Hex $(<:B).hex : $(<) ;
+	for _p in $(PORTS)
+	{
+		Upload $(_p) : $(PORT_$(_p)) : $(<:B).hex ;
+	}
+}
+
+#
+# Targets
+#
+
+# Grab everything from the core directory
+Library core : [ GLOB $(ARDUINO_CORE) : *.c *.cpp ] ;
+
+# Grab everything from libraries.  To avoid this "grab everything" behaviour, you
+# can specify specific modules to pick up in PROJECT_MODULES
+Library libs : [ GLOB $(ARDUINO_LIB)/$(PROJECT_LIBS) $(ARDUINO_LIB)/$(PROJECT_LIBS)/utility $(SKETCH_LIB)/$(PROJECT_LIBS) : *.cpp *.c ] ;
+
+# Main output executable
+Arduino $(PWD:B).elf : $(PROJECT_MODULES) [ GLOB $(PROJECT_DIRS) : *.c *.cpp *.pde *.ino ] ;

hardware/digistump/avr/libraries/RF24/examples/pingpair_irq/pingpair_irq.pde

@@ -0,0 +1,216 @@
+/*
+ Copyright (C) 2011 J. Coliz <maniacbug@ymail.com>
+
+ This program is free software; you can redistribute it and/or
+ modify it under the terms of the GNU General Public License
+ version 2 as published by the Free Software Foundation.
+ */
+
+/**
+ * Example of using interrupts
+ *
+ * This is an example of how to user interrupts to interact with the radio.
+ * It builds on the pingpair_pl example, and uses ack payloads.
+ */
+
+#include <SPI.h>
+#include "nRF24L01.h"
+#include "RF24.h"
+#include "printf.h"
+
+//
+// Hardware configuration
+//
+
+// Set up nRF24L01 radio on SPI bus plus pins 9 & 10
+
+RF24 radio(8,9);
+
+// sets the role of this unit in hardware.  Connect to GND to be the 'pong' receiver
+// Leave open to be the 'ping' transmitter
+const short role_pin = 7;
+
+//
+// Topology
+//
+
+// Single radio pipe address for the 2 nodes to communicate.
+const uint64_t pipe = 0xE8E8F0F0E1LL;
+
+//
+// Role management
+//
+// Set up role.  This sketch uses the same software for all the nodes in this
+// system.  Doing so greatly simplifies testing.  The hardware itself specifies
+// which node it is.
+//
+// This is done through the role_pin
+//
+
+// The various roles supported by this sketch
+typedef enum { role_sender = 1, role_receiver } role_e;
+
+// The debug-friendly names of those roles
+const char* role_friendly_name[] = { "invalid", "Sender", "Receiver"};
+
+// The role of the current running sketch
+role_e role;
+
+// Interrupt handler, check the radio because we got an IRQ
+void check_radio(void);
+
+void setup(void)
+{
+  //
+  // Role
+  //
+
+  // set up the role pin
+  pinMode(role_pin, INPUT);
+  digitalWrite(role_pin,HIGH);
+  delay(20); // Just to get a solid reading on the role pin
+
+  // read the address pin, establish our role
+  if ( digitalRead(role_pin) )
+    role = role_sender;
+  else
+    role = role_receiver;
+
+  //
+  // Print preamble
+  //
+
+  Serial.begin(57600);
+  printf_begin();
+  printf("\n\rRF24/examples/pingpair_irq/\n\r");
+  printf("ROLE: %s\n\r",role_friendly_name[role]);
+
+  //
+  // Setup and configure rf radio
+  //
+
+  radio.begin();
+
+  // We will be using the Ack Payload feature, so please enable it
+  radio.enableAckPayload();
+
+  //
+  // Open pipes to other nodes for communication
+  //
+
+  // This simple sketch opens a single pipe for these two nodes to communicate
+  // back and forth.  One listens on it, the other talks to it.
+
+  if ( role == role_sender )
+  {
+    radio.openWritingPipe(pipe);
+  }
+  else
+  {
+    radio.openReadingPipe(1,pipe);
+  }
+
+  //
+  // Start listening
+  //
+
+  if ( role == role_receiver )
+    radio.startListening();
+
+  //
+  // Dump the configuration of the rf unit for debugging
+  //
+
+  radio.printDetails();
+
+  //
+  // Attach interrupt handler to interrupt #0 (using pin 2)
+  // on BOTH the sender and receiver
+  //
+
+  attachInterrupt(0, check_radio, FALLING);
+}
+
+static uint32_t message_count = 0;
+
+void loop(void)
+{
+  //
+  // Sender role.  Repeatedly send the current time
+  //
+
+  if (role == role_sender)
+  {
+    // Take the time, and send it.
+    unsigned long time = millis();
+    printf("Now sending %lu\n\r",time);
+    radio.startWrite( &time, sizeof(unsigned long) );
+
+    // Try again soon
+    delay(2000);
+  }
+
+  //
+  // Receiver role: Does nothing!  All the work is in IRQ
+  //
+
+}
+
+void check_radio(void)
+{
+  // What happened?
+  bool tx,fail,rx;
+  radio.whatHappened(tx,fail,rx);
+
+  // Have we successfully transmitted?
+  if ( tx )
+  {
+    if ( role == role_sender )
+      printf("Send:OK\n\r");
+
+    if ( role == role_receiver )
+      printf("Ack Payload:Sent\n\r");
+  }
+
+  // Have we failed to transmit?
+  if ( fail )
+  {
+    if ( role == role_sender )
+      printf("Send:Failed\n\r");
+
+    if ( role == role_receiver )
+      printf("Ack Payload:Failed\n\r");
+  }
+
+  // Transmitter can power down for now, because
+  // the transmission is done.
+  if ( ( tx || fail ) && ( role == role_sender ) )
+    radio.powerDown();
+
+  // Did we receive a message?
+  if ( rx )
+  {
+    // If we're the sender, we've received an ack payload
+    if ( role == role_sender )
+    {
+      radio.read(&message_count,sizeof(message_count));
+      printf("Ack:%lu\n\r",message_count);
+    }
+
+    // If we're the receiver, we've received a time message
+    if ( role == role_receiver )
+    {
+      // Get this payload and dump it
+      static unsigned long got_time;
+      radio.read( &got_time, sizeof(got_time) );
+      printf("Got payload %lu\n\r",got_time);
+
+      // Add an ack packet for the next time around.  This is a simple
+      // packet counter
+      radio.writeAckPayload( 1, &message_count, sizeof(message_count) );
+      ++message_count;
+    }
+  }
+}
+
+// vim:ai:cin:sts=2 sw=2 ft=cpp

hardware/digistump/avr/libraries/RF24/examples/pingpair_irq/printf.h

@@ -0,0 +1,37 @@
+/*
+ Copyright (C) 2011 J. Coliz <maniacbug@ymail.com>
+ 
+ This program is free software; you can redistribute it and/or
+ modify it under the terms of the GNU General Public License
+ version 2 as published by the Free Software Foundation.
+ */
+ 
+/**
+ * @file printf.h
+ *
+ * Setup necessary to direct stdout to the Arduino Serial library, which
+ * enables 'printf'
+ */
+
+#ifndef __PRINTF_H__
+#define __PRINTF_H__
+
+#ifdef ARDUINO
+
+int serial_putc( char c, FILE * ) 
+{
+  Serial.write( c );
+
+  return c;
+} 
+
+void printf_begin(void)
+{
+  fdevopen( &serial_putc, 0 );
+}
+
+#else
+#error This example is only for use on Arduino.
+#endif // ARDUINO
+
+#endif // __PRINTF_H__

hardware/digistump/avr/libraries/RF24/examples/pingpair_maple/Jamfile

@@ -0,0 +1,182 @@
+MCU		= cortex-m3 ;
+CHIP		= STM32F103ZE ;
+BOARD		= maple_native ;
+
+#CHIP		= at91sam3u4 ;
+#BOARD		= sam3u-ek ;
+
+if ! $(TOOLSET)
+{
+	TOOLSET = devkit ;
+	Echo "Assuming TOOLSET=devkit" ;
+}
+
+if $(TOOLSET) = yagarto
+{
+	TOOLS_PATH	= ~/Source/yagarto-4.6.2/bin ;
+	TOOLS_ARCH	= arm-none-eabi- ;
+}
+if $(TOOLSET) = yagarto-install
+{
+	TOOLS_PATH	= ~/Source/yagarto/install/bin ;
+	TOOLS_ARCH	= arm-none-eabi- ;
+}
+else if $(TOOLSET) = devkit
+{
+	TOOLS_PATH	= /opt/devkitARM/bin ;
+	TOOLS_ARCH	= arm-eabi- ;
+}
+else if $(TOOLSET) = maple
+{
+	TOOLS_PATH	= /opt/Maple/Resources/Java/hardware/tools/arm/bin ; 
+	TOOLS_ARCH	= arm-none-eabi- ;
+}
+else if $(TOOLSET) = ports
+{
+	TOOLS_PATH	= /opt/local/bin ;
+	TOOLS_ARCH	= arm-none-eabi- ;
+}
+
+CC	  	= $(TOOLS_PATH)/$(TOOLS_ARCH)gcc ;
+C++	 	= $(TOOLS_PATH)/$(TOOLS_ARCH)g++ ;
+AS	  	= $(TOOLS_PATH)/$(TOOLS_ARCH)gcc -c ;
+LINK	  	= $(TOOLS_PATH)/$(TOOLS_ARCH)g++ ;
+OBJCOPY 	= $(TOOLS_PATH)/$(TOOLS_ARCH)objcopy ;
+DFU		= dfu-util ;
+
+DEFINES  	+= VECT_TAB_FLASH BOARD_$(BOARD) MCU_$(CHIP) ERROR_LED_PORT=GPIOC ERROR_LED_PIN=15 STM32_HIGH_DENSITY MAPLE_IDE ;
+OPTIM		= -Os ;
+MFLAGS		= cpu=$(MCU) thumb arch=armv7-m ;
+CCFLAGS  	= -Wall -m$(MFLAGS) -g -nostdlib -ffunction-sections -fdata-sections -Wl,--gc-sections ;
+C++FLAGS  	= $(CCFLAGS) -fno-rtti -fno-exceptions ; 
+LINKFLAGS  	+= -m$(MFLAGS) -Xlinker --gc-sections ;
+DFUFLAGS	= -a1 -d 0x1eaf:0x0003 -R ;
+
+MAPLE_DIR	= $(HOME)/Source/SAM3U/libmaple ;
+MAPLE_LIBS	= Servo LiquidCrystal Wire FreeRTOS ;
+MAPLE_SUBDIRS	= wirish wirish/comm wirish/boards libmaple libmaple/usb libmaple/usb/usb_lib ; 
+
+SKETCH_DIR	= $(HOME)/Source/Arduino ;
+SKETCH_LIBS	= RF24 ;
+
+MODULE_DIRS	= . $(MAPLE_DIR)/$(MAPLE_SUBDIRS) $(MAPLE_DIR)/libraries/$(MAPLE_LIBS) $(SKETCH_DIR)/libraries/$(SKETCH_LIBS) ;
+HDRS		= $(MODULE_DIRS) ;
+LOCATE_TARGET	= out/$(TOOLSET) ;
+LOCATE_SOURCE	= $(LOCATE_TARGET) ; 
+
+rule Pde
+{
+	Depends $(<) : $(>) ;
+	MakeLocate $(<) : $(LOCATE_SOURCE) ;
+	Clean clean : $(<) ;
+}
+
+if ( $(ARDUINO_VERSION) < 100 )
+{
+	ARDUINO_H = WProgram.h ;
+}
+else
+{
+	ARDUINO_H = Arduino.h ;
+}
+
+actions Pde
+{
+	echo "#include <$(ARDUINO_H)>" > $(<) 
+	echo "#line 1 \"$(>)\"" >> $(<)
+	cat $(>) >> $(<) 
+}
+
+rule C++Pde
+{
+	local _CPP = $(>:B).cpp ;
+	Pde $(_CPP) : $(>) ;
+	C++ $(<) : $(_CPP) ;
+}
+
+rule Hex
+{
+	Depends $(<) : $(>) ;
+	MakeLocate $(<) : $(LOCATE_TARGET) ;
+	Depends hex : $(<) ;
+	Clean clean : $(<) ;
+}
+
+actions Hex
+{
+	$(OBJCOPY) -O ihex $(>) $(<)
+}
+
+rule Binary
+{
+	Depends $(<) : $(>) ;
+	MakeLocate $(<) : $(LOCATE_TARGET) ;
+	Depends binary : $(<) ;
+	Clean clean : $(<) ;
+}
+
+actions Binary
+{
+	$(OBJCOPY) -O binary $(>) $(<)
+}
+
+rule UserObject
+{
+	switch $(>:S)
+	{
+		case .S : As $(<) : $(>) ;
+		case .ino : C++Pde $(<) : $(>) ;
+		case .pde : C++Pde $(<) : $(>) ;
+	}
+}
+
+rule Upload
+{
+	Depends up : $(<) ;
+	NotFile up ;
+	Always $(<) ;
+	Always up ;
+}
+
+actions Upload
+{
+	$(DFU) $(DFUFLAGS)  -D $(<)
+}
+
+# Override base objects rule, so all output can go in the output dir
+rule Objects
+{
+        local _i ;
+
+        for _i in [ FGristFiles $(<) ]
+        {
+		local _b = $(_i:B)$(SUFOBJ) ;
+		local _o = $(_b:G=$(SOURCE_GRIST:E)) ;
+                Object $(_o) : $(_i) ;
+                Depends obj : $(_o) ;
+        }
+}
+
+# Override base main rule, so all output can go in the output dir
+rule Main
+{
+        MainFromObjects $(<) : $(>:B)$(SUFOBJ) ;
+        Objects $(>) ;
+}
+
+# Modules
+MODULES	= [ GLOB $(MODULE_DIRS) : *.pde *.c *.cpp *.S ] ; 
+
+# Main output executable
+MAIN		= $(PWD:B).elf ;
+
+# Linker script
+LINK_DIR	= $(MAPLE_DIR)/support/ld ;
+LINKSCRIPT	= $(LINK_DIR)/$(BOARD)/flash.ld ; 
+
+# Bring in the map and link script
+LINKFLAGS	+= -Wl,-Map=$(LOCATE_TARGET)/$(MAIN:B).map -T$(LINKSCRIPT) -L$(LINK_DIR) ;
+
+Main $(MAIN) : $(MODULES) ;
+Binary $(MAIN:B).bin : $(MAIN) ;
+Upload $(MAIN:B).bin ;

hardware/digistump/avr/libraries/RF24/examples/pingpair_maple/main.cpp

@@ -0,0 +1,87 @@
+#ifdef MAPLE_IDE
+
+#include <stdio.h>
+#include "wirish.h"
+
+extern void setup(void);
+extern void loop(void);
+
+void board_start(const char* program_name)
+{
+  // Set up the LED to steady on
+  pinMode(BOARD_LED_PIN, OUTPUT);
+  digitalWrite(BOARD_LED_PIN, HIGH);
+
+  // Setup the button as input
+  pinMode(BOARD_BUTTON_PIN, INPUT);
+  digitalWrite(BOARD_BUTTON_PIN, HIGH);
+
+  SerialUSB.begin();
+  SerialUSB.println("Press BUT");
+
+  // Wait for button press
+  while ( !isButtonPressed() )
+  {
+  }
+
+  SerialUSB.println("Welcome!");
+  SerialUSB.println(program_name);
+
+  int i = 11;
+  while (i--)
+  {
+    toggleLED();
+    delay(50);
+  }
+}
+
+/**
+ * Custom version of _write, which will print to the USB.
+ * In order to use it you MUST ADD __attribute__((weak))
+ * to _write in libmaple/syscalls.c
+*/
+extern "C" int _write (int file, char * ptr, int len)
+{
+  if ( (file != 1) && (file != 2) )
+    return 0; 
+  else
+    SerialUSB.write(ptr,len);
+  return len;
+}
+
+/**
+ * Re-entrant version of _write.  Yagarto and Devkit now use
+ * the re-entrant newlib, so these get called instead of the
+ * non_r versions.
+ */
+extern "C" int _write_r (void*, int file, char * ptr, int len)
+{
+  return _write( file, ptr, len);
+}
+
+__attribute__((constructor)) __attribute__ ((weak)) void premain()
+{
+  init();
+}
+
+__attribute__((weak)) void setup(void)
+{
+  board_start("No program defined");
+}
+
+__attribute__((weak)) void loop(void)
+{
+}
+
+__attribute__((weak)) int main(void)
+{
+  setup();
+
+  while (true)
+  {
+    loop();
+  }
+  return 0;
+}
+#endif // ifdef MAPLE_IDE
+// vim:cin:ai:sts=2 sw=2 ft=cpp

hardware/digistump/avr/libraries/RF24/examples/pingpair_maple/pingpair_maple.pde

@@ -0,0 +1,242 @@
+/*
+ Copyright (C) 2011 J. Coliz <maniacbug@ymail.com>
+
+ This program is free software; you can redistribute it and/or
+ modify it under the terms of the GNU General Public License
+ version 2 as published by the Free Software Foundation.
+ */
+
+/**
+ * Example RF Radio Ping Pair ... for Maple
+ *
+ * This is an example of how to use the RF24 class.  Write this sketch to two different nodes,
+ * connect the role_pin to ground on one.  The ping node sends the current time to the pong node,
+ * which responds by sending the value back.  The ping node can then see how long the whole cycle
+ * took.
+ */
+
+#include "WProgram.h"
+#include <SPI.h>
+#include "nRF24L01.h"
+#include "RF24.h"
+
+//
+// Maple specific setup.  Other than this section, the sketch is the same on Maple as on
+// Arduino
+//
+
+#ifdef MAPLE_IDE
+
+// External startup function
+extern void board_start(const char* program_name);
+
+// Use SPI #2.
+HardwareSPI SPI(2);
+
+#else
+#define board_startup printf
+#define toggleLED(x) (x)
+#endif
+
+//
+// Hardware configuration
+//
+
+// Set up nRF24L01 radio on SPI bus plus pins 7 & 6
+// (This works for the Getting Started board plugged into the
+// Maple Native backwards.)
+
+RF24 radio(7,6);
+
+// sets the role of this unit in hardware.  Connect to GND to be the 'pong' receiver
+// Leave open to be the 'ping' transmitter
+const int role_pin = 10;
+
+//
+// Topology
+//
+
+// Radio pipe addresses for the 2 nodes to communicate.
+const uint64_t pipes[2] = { 0xF0F0F0F0E1LL, 0xF0F0F0F0D2LL };
+
+//
+// Role management
+//
+// Set up role.  This sketch uses the same software for all the nodes
+// in this system.  Doing so greatly simplifies testing.  The hardware itself specifies
+// which node it is.
+//
+// This is done through the role_pin
+//
+
+// The various roles supported by this sketch
+typedef enum { role_ping_out = 1, role_pong_back } role_e;
+
+// The debug-friendly names of those roles
+const char* role_friendly_name[] = { "invalid", "Ping out", "Pong back"};
+
+// The role of the current running sketch
+role_e role;
+
+void setup(void)
+{
+  //
+  // Role
+  //
+
+  // set up the role pin
+  pinMode(role_pin, INPUT);
+  digitalWrite(role_pin,HIGH);
+  delay(20); // Just to get a solid reading on the role pin
+
+  // read the address pin, establish our role
+  if ( digitalRead(role_pin) )
+    role = role_ping_out;
+  else
+    role = role_pong_back;
+
+  //
+  // Print preamble
+  //
+
+  board_start("\n\rRF24/examples/pingpair/\n\r");
+  printf("ROLE: %s\n\r",role_friendly_name[role]);
+
+  //
+  // Setup and configure rf radio
+  //
+
+  radio.begin();
+
+  // optionally, increase the delay between retries & # of retries
+  radio.setRetries(15,15);
+
+  // optionally, reduce the payload size.  seems to
+  // improve reliability
+  radio.setPayloadSize(8);
+
+  //
+  // Open pipes to other nodes for communication
+  //
+
+  // This simple sketch opens two pipes for these two nodes to communicate
+  // back and forth.
+  // Open 'our' pipe for writing
+  // Open the 'other' pipe for reading, in position #1 (we can have up to 5 pipes open for reading)
+
+  if ( role == role_ping_out )
+  {
+    radio.openWritingPipe(pipes[0]);
+    radio.openReadingPipe(1,pipes[1]);
+  }
+  else
+  {
+    radio.openWritingPipe(pipes[1]);
+    radio.openReadingPipe(1,pipes[0]);
+  }
+
+  //
+  // Start listening
+  //
+
+  radio.startListening();
+
+  //
+  // Dump the configuration of the rf unit for debugging
+  //
+
+  radio.printDetails();
+}
+
+void loop(void)
+{
+  //
+  // Ping out role.  Repeatedly send the current time
+  //
+
+  if (role == role_ping_out)
+  {
+    toggleLED();
+
+    // First, stop listening so we can talk.
+    radio.stopListening();
+
+    // Take the time, and send it.  This will block until complete
+    unsigned long time = millis();
+    printf("Now sending %lu...",time);
+    bool ok = radio.write( &time, sizeof(unsigned long) );
+
+    if (ok)
+      printf("ok...\r\n");
+    else
+      printf("failed.\r\n");
+
+    // Now, continue listening
+    radio.startListening();
+
+    // Wait here until we get a response, or timeout (250ms)
+    unsigned long started_waiting_at = millis();
+    bool timeout = false;
+    while ( ! radio.available() && ! timeout )
+      if (millis() - started_waiting_at > 200 )
+        timeout = true;
+
+    // Describe the results
+    if ( timeout )
+    {
+      printf("Failed, response timed out.\r\n");
+    }
+    else
+    {
+      // Grab the response, compare, and send to debugging spew
+      unsigned long got_time;
+      radio.read( &got_time, sizeof(unsigned long) );
+
+      // Spew it
+      printf("Got response %lu, round-trip delay: %lu\r\n",got_time,millis()-got_time);
+    }
+
+    toggleLED();
+
+    // Try again 1s later
+    delay(1000);
+  }
+
+  //
+  // Pong back role.  Receive each packet, dump it out, and send it back
+  //
+
+  if ( role == role_pong_back )
+  {
+    // if there is data ready
+    if ( radio.available() )
+    {
+      // Dump the payloads until we've gotten everything
+      unsigned long got_time;
+      bool done = false;
+      while (!done)
+      {
+        // Fetch the payload, and see if this was the last one.
+        done = radio.read( &got_time, sizeof(unsigned long) );
+
+        // Spew it
+        printf("Got payload %lu...",got_time);
+
+        // Delay just a little bit to let the other unit
+        // make the transition to receiver
+        delay(20);
+      }
+
+      // First, stop listening so we can talk
+      radio.stopListening();
+
+      // Send the final one back.
+      radio.write( &got_time, sizeof(unsigned long) );
+      printf("Sent response.\r\n");
+
+      // Now, resume listening so we catch the next packets.
+      radio.startListening();
+    }
+  }
+}
+// vim:cin:ai:sts=2 sw=2 ft=cpp

hardware/digistump/avr/libraries/RF24/examples/pingpair_pl/Jamfile

@@ -0,0 +1,206 @@
+PROJECT_NAME 	= $(PWD:B) ;
+PROJECT_DIR 	= . ;
+PROJECT_LIBS = SPI RF24 ; 
+
+OUT_DIR = ojam ;
+F_CPU 		= 16000000 ;
+MCU             = atmega328p ;
+PORTS           = /dev/tty.usbserial-A600eHIs /dev/tty.usbserial-A40081RP /dev/tty.usbserial-A9007LmI ;
+
+UPLOAD_RATE 	= 57600 ;
+AVRDUDE_PROTOCOL = stk500v1 ;
+COM 		= 33 ;
+
+# Host-specific overrides for locations 
+if $(OS) = MACOSX 
+{
+ARDUINO_VERSION	= 22 ;
+OLD_DIR 	= /opt/arduino-0021 ;
+AVR_TOOLS_PATH 	= $(OLD_DIR)/hardware/tools/avr/bin ;
+AVRDUDECONFIG_PATH = $(OLD_DIR)/hardware/tools/avr/etc ;
+ARDUINO_DIR 	= /opt/Arduino ;
+ARDUINO_AVR 	= /usr/lib/avr/include ;
+}
+
+# Where is everything?
+ARDUINO_VERSION	?= 22 ;
+AVR_TOOLS_PATH 	?= /usr/bin ;
+ARDUINO_DIR 	?= /opt/arduino-00$(ARDUINO_VERSION) ;
+ARDUINO_AVR 	?= $(ARDUINO_DIR)/hardware/tools/avr/avr/include/avr ;
+AVRDUDECONFIG_PATH ?= $(ARDUINO_DIR)/hardware/tools ;
+ARDUINO_CORE 	= $(ARDUINO_DIR)/hardware/arduino/cores/arduino ;
+ARDUINO_LIB 	= $(ARDUINO_DIR)/libraries ;
+SKETCH_LIB      = $(HOME)/Source/Arduino/libraries ;
+AVR_CC  	= $(AVR_TOOLS_PATH)/avr-gcc ;
+AVR_CXX  	= $(AVR_TOOLS_PATH)/avr-g++ ;
+AVR_LD  	= $(AVR_TOOLS_PATH)/avr-gcc ;
+AVR_OBJCOPY 	= $(AVR_TOOLS_PATH)/avr-objcopy ;
+AVRDUDE 	= $(AVR_TOOLS_PATH)/avrdude ;
+
+DEFINES  	= F_CPU=$(F_CPU)L ARDUINO=$(ARDUINO_VERSION) VERSION_H ;
+CTUNING  	= -ffunction-sections -fdata-sections ;
+CXXTUNING  	= -fno-exceptions -fno-strict-aliasing ; 
+CFLAGS  	= -Os -Wall -Wextra -mmcu=$(MCU) $(CTUNING) ;
+CXXFLAGS  	= $(CFLAGS) $(CXXTUNING) ;
+LDFLAGS  	= -Os -lm -Wl,--gc-sections -mmcu=atmega328p ;
+
+# Search everywhere for headers
+HDRS  	 	= $(PROJECT_DIR) $(ARDUINO_AVR) $(ARDUINO_CORE) [ GLOB $(ARDUINO_LIB) $(SKETCH_LIB) : [^.]* ] ;
+
+# Grab everything from the core directory
+CORE_MODULES  	= [ GLOB $(ARDUINO_CORE) : *.c *.cpp ] ;
+
+# Grab everything from libraries.  To avoid this "grab everything" behaviour, you
+# can specify specific modules to pick up in PROJECT_MODULES
+LIB_MODULES  	= [ GLOB $(ARDUINO_LIB)/$(PROJECT_LIBS) $(SKETCH_LIB)/$(PROJECT_LIBS) : *.cpp ] ;
+
+# In addition to explicitly-specified program modules, pick up anything from the current
+# dir.
+PROJECT_MODULES += [ GLOB $(PROJECT_DIR) : *.c *.cpp *.pde ] ;
+
+# Shortcut for the out files
+OUT             = $(OUT_DIR)/$(PROJECT_NAME) ;
+
+# AvrDude setup
+AVRDUDE_FLAGS = -V -F -D -C $(AVRDUDECONFIG_PATH)/avrdude.conf -p $(MCU) -c $(AVRDUDE_PROTOCOL) -b $(UPLOAD_RATE) ;
+
+rule GitVersion
+{
+  Always $(<) ;
+  Depends all : $(<) ;
+}
+
+actions GitVersion
+{
+  echo "const char program_version[] = \"\\" > $(<)
+  git log -1 --pretty=format:%h >> $(<)
+  echo "\";" >> $(<)
+}
+
+GitVersion version.h ;
+
+rule AvrCc
+{
+  Depends $(<) : $(>) ;
+  Depends $(<) : $(<:D) ;
+  Clean clean : $(<) ;
+
+  CCHDRS on $(<) = [ on $(<) FIncludes $(HDRS) ] ;
+  CCDEFS on $(<) = [ on $(<) FDefines $(DEFINES) ] ;
+}
+
+actions AvrCc
+{
+  $(AVR_CC) -c -o $(<) $(CCHDRS) $(CCDEFS) $(CFLAGS) $(>) 
+}
+
+rule AvrC++
+{
+  Depends $(<) : $(>) ;
+  Depends $(<) : $(<:D) ;
+  Clean clean : $(<) ;
+
+  CCHDRS on $(<) = [ on $(<) FIncludes $(HDRS) ] ;
+  CCDEFS on $(<) = [ on $(<) FDefines $(DEFINES) ] ;
+}
+
+actions AvrC++
+{
+  $(AVR_CXX) -c -o $(<) $(CCHDRS) $(CCDEFS) $(CXXFLAGS) $(>) 
+}
+
+rule Pde
+{
+  Depends $(<) : $(>) ;
+  Depends $(<) : $(<:D) ;
+  Clean clean : $(<) ;
+
+}
+
+actions Pde
+{
+  echo "#include <WProgram.h>" > $(<) 
+  echo "#line 1 \"$(>)\"" >> $(<)
+  cat $(>) >> $(<) 
+}
+
+rule AvrPde
+{
+  local _CPP = $(OUT_DIR)/$(_I:B).cpp ;
+  Pde $(_CPP) : $(>) ;
+  AvrC++ $(<) : $(_CPP) ;
+}
+
+rule AvrObject
+{
+  switch $(>:S)
+  {
+    case .c :   AvrCc $(<) : $(>) ;
+    case .cpp : AvrC++ $(<) : $(>) ;
+    case .pde : AvrPde $(<) : $(>) ;
+  }
+}
+
+rule AvrObjects
+{
+  for _I in $(<) 
+  {
+    AvrObject $(OUT_DIR)/$(_I:B).o : $(_I) ;
+  }
+}
+
+rule AvrMainFromObjects
+{
+  Depends $(<) : $(>) ;
+  Depends $(<) : $(<:D) ;
+  MkDir $(<:D) ;
+  Depends all : $(<) ;
+  Clean clean : $(<) ;
+}
+
+actions AvrMainFromObjects
+{
+  $(AVR_LD) $(LDFLAGS) -o $(<) $(>) 
+}
+
+rule AvrMain
+{
+  AvrMainFromObjects $(<) : $(OUT_DIR)/$(>:B).o ;
+  AvrObjects $(>) ;
+}
+
+rule AvrHex
+{
+  Depends $(<) : $(>) ;
+  Depends $(<) : $(<:D) ;
+  Depends hex : $(<) ;
+  Clean clean : $(<) ;
+}
+
+actions AvrHex
+{
+  $(AVR_OBJCOPY) -O ihex -R .eeprom $(>) $(<)
+}
+
+rule AvrUpload
+{
+  Depends $(1) : $(2) ;
+  Depends $(2) : $(3) ;
+  NotFile $(1) ;
+  Always $(1) ;
+  Always $(2) ;
+  AvrUploadAction $(2) : $(3) ;
+}
+
+actions AvrUploadAction
+{
+  $(AVRDUDE) $(AVRDUDE_FLAGS) -P $(<) $(AVRDUDE_WRITE_FLASH) -U flash:w:$(>):i
+}
+
+AvrMain $(OUT).elf : $(CORE_MODULES) $(LIB_MODULES) $(PROJECT_MODULES) ;
+AvrHex $(OUT).hex : $(OUT).elf ;
+
+AvrUpload p6 : /dev/tty.usbserial-A600eHIs : $(OUT).hex ;
+AvrUpload p4 : /dev/tty.usbserial-A40081RP : $(OUT).hex ;
+AvrUpload p9 : /dev/tty.usbserial-A9007LmI : $(OUT).hex ;
+

hardware/digistump/avr/libraries/RF24/examples/pingpair_pl/pingpair_pl.pde

@@ -0,0 +1,180 @@
+/*
+ Copyright (C) 2011 J. Coliz <maniacbug@ymail.com>
+
+ This program is free software; you can redistribute it and/or
+ modify it under the terms of the GNU General Public License
+ version 2 as published by the Free Software Foundation.
+ */
+
+/**
+ * Example of using Ack Payloads
+ *
+ * This is an example of how to do two-way communication without changing
+ * transmit/receive modes.  Here, a payload is set to the transmitter within
+ * the Ack packet of each transmission.  Note that the payload is set BEFORE
+ * the sender's message arrives.
+ */
+
+#include <SPI.h>
+#include "nRF24L01.h"
+#include "RF24.h"
+#include "printf.h"
+
+//
+// Hardware configuration
+//
+
+// Set up nRF24L01 radio on SPI bus plus pins 9 & 10
+
+RF24 radio(9,10);
+
+// sets the role of this unit in hardware.  Connect to GND to be the 'pong' receiver
+// Leave open to be the 'ping' transmitter
+const short role_pin = 7;
+
+//
+// Topology
+//
+
+// Single radio pipe address for the 2 nodes to communicate.
+const uint64_t pipe = 0xE8E8F0F0E1LL;
+
+//
+// Role management
+//
+// Set up role.  This sketch uses the same software for all the nodes in this
+// system.  Doing so greatly simplifies testing.  The hardware itself specifies
+// which node it is.
+//
+// This is done through the role_pin
+//
+
+// The various roles supported by this sketch
+typedef enum { role_sender = 1, role_receiver } role_e;
+
+// The debug-friendly names of those roles
+const char* role_friendly_name[] = { "invalid", "Sender", "Receiver"};
+
+// The role of the current running sketch
+role_e role;
+
+void setup(void)
+{
+  //
+  // Role
+  //
+
+  // set up the role pin
+  pinMode(role_pin, INPUT);
+  digitalWrite(role_pin,HIGH);
+  delay(20); // Just to get a solid reading on the role pin
+
+  // read the address pin, establish our role
+  if ( digitalRead(role_pin) )
+    role = role_sender;
+  else
+    role = role_receiver;
+
+  //
+  // Print preamble
+  //
+
+  Serial.begin(57600);
+  printf_begin();
+  printf("\n\rRF24/examples/pingpair_pl/\n\r");
+  printf("ROLE: %s\n\r",role_friendly_name[role]);
+
+  //
+  // Setup and configure rf radio
+  //
+
+  radio.begin();
+
+  // We will be using the Ack Payload feature, so please enable it
+  radio.enableAckPayload();
+
+  //
+  // Open pipes to other nodes for communication
+  //
+
+  // This simple sketch opens a single pipes for these two nodes to communicate
+  // back and forth.  One listens on it, the other talks to it.
+
+  if ( role == role_sender )
+  {
+    radio.openWritingPipe(pipe);
+  }
+  else
+  {
+    radio.openReadingPipe(1,pipe);
+  }
+
+  //
+  // Start listening
+  //
+
+  if ( role == role_receiver )
+    radio.startListening();
+
+  //
+  // Dump the configuration of the rf unit for debugging
+  //
+
+  radio.printDetails();
+}
+
+void loop(void)
+{
+  static uint32_t message_count = 0;
+
+  //
+  // Sender role.  Repeatedly send the current time
+  //
+
+  if (role == role_sender)
+  {
+    // Take the time, and send it.  This will block until complete
+    unsigned long time = millis();
+    printf("Now sending %lu...",time);
+    radio.write( &time, sizeof(unsigned long) );
+
+    if ( radio.isAckPayloadAvailable() )
+    {
+      radio.read(&message_count,sizeof(message_count));
+      printf("Ack: [%lu] ",message_count);
+    }
+    printf("OK\n\r");
+
+    // Try again soon
+    delay(2000);
+  }
+
+  //
+  // Receiver role.  Receive each packet, dump it out, add ack payload for next time
+  //
+
+  if ( role == role_receiver )
+  {
+    // if there is data ready
+    if ( radio.available() )
+    {
+      // Dump the payloads until we've gotten everything
+      static unsigned long got_time;
+      bool done = false;
+      while (!done)
+      {
+        // Fetch the payload, and see if this was the last one.
+        done = radio.read( &got_time, sizeof(unsigned long) );
+
+        // Spew it
+        printf("Got payload %lu\n",got_time);
+      }
+
+      // Add an ack packet for the next time around.  This is a simple
+      // packet counter
+      radio.writeAckPayload( 1, &message_count, sizeof(message_count) );
+      ++message_count;
+    }
+  }
+}
+// vim:ai:cin:sts=2 sw=2 ft=cpp

hardware/digistump/avr/libraries/RF24/examples/pingpair_pl/printf.h

@@ -0,0 +1,37 @@
+/*
+ Copyright (C) 2011 J. Coliz <maniacbug@ymail.com>
+ 
+ This program is free software; you can redistribute it and/or
+ modify it under the terms of the GNU General Public License
+ version 2 as published by the Free Software Foundation.
+ */
+ 
+/**
+ * @file printf.h
+ *
+ * Setup necessary to direct stdout to the Arduino Serial library, which
+ * enables 'printf'
+ */
+
+#ifndef __PRINTF_H__
+#define __PRINTF_H__
+
+#ifdef ARDUINO
+
+int serial_putc( char c, FILE * ) 
+{
+  Serial.write( c );
+
+  return c;
+} 
+
+void printf_begin(void)
+{
+  fdevopen( &serial_putc, 0 );
+}
+
+#else
+#error This example is only for use on Arduino.
+#endif // ARDUINO
+
+#endif // __PRINTF_H__

hardware/digistump/avr/libraries/RF24/examples/pingpair_sleepy/Jamfile

@@ -0,0 +1,206 @@
+PROJECT_NAME 	= $(PWD:B) ;
+PROJECT_DIR 	= . ;
+PROJECT_LIBS = SPI RF24 ; 
+
+OUT_DIR = ojam ;
+F_CPU 		= 16000000 ;
+MCU             = atmega328p ;
+PORTS           = /dev/tty.usbserial-A600eHIs /dev/tty.usbserial-A40081RP /dev/tty.usbserial-A9007LmI ;
+
+UPLOAD_RATE 	= 57600 ;
+AVRDUDE_PROTOCOL = stk500v1 ;
+COM 		= 33 ;
+
+# Host-specific overrides for locations 
+if $(OS) = MACOSX 
+{
+ARDUINO_VERSION	= 22 ;
+OLD_DIR 	= /opt/arduino-0021 ;
+AVR_TOOLS_PATH 	= $(OLD_DIR)/hardware/tools/avr/bin ;
+AVRDUDECONFIG_PATH = $(OLD_DIR)/hardware/tools/avr/etc ;
+ARDUINO_DIR 	= /opt/Arduino ;
+ARDUINO_AVR 	= /usr/lib/avr/include ;
+}
+
+# Where is everything?
+ARDUINO_VERSION	?= 22 ;
+AVR_TOOLS_PATH 	?= /usr/bin ;
+ARDUINO_DIR 	?= /opt/arduino-00$(ARDUINO_VERSION) ;
+ARDUINO_AVR 	?= $(ARDUINO_DIR)/hardware/tools/avr/avr/include/avr ;
+AVRDUDECONFIG_PATH ?= $(ARDUINO_DIR)/hardware/tools ;
+ARDUINO_CORE 	= $(ARDUINO_DIR)/hardware/arduino/cores/arduino ;
+ARDUINO_LIB 	= $(ARDUINO_DIR)/libraries ;
+SKETCH_LIB      = $(HOME)/Source/Arduino/libraries ;
+AVR_CC  	= $(AVR_TOOLS_PATH)/avr-gcc ;
+AVR_CXX  	= $(AVR_TOOLS_PATH)/avr-g++ ;
+AVR_LD  	= $(AVR_TOOLS_PATH)/avr-gcc ;
+AVR_OBJCOPY 	= $(AVR_TOOLS_PATH)/avr-objcopy ;
+AVRDUDE 	= $(AVR_TOOLS_PATH)/avrdude ;
+
+DEFINES  	= F_CPU=$(F_CPU)L ARDUINO=$(ARDUINO_VERSION) VERSION_H ;
+CTUNING  	= -ffunction-sections -fdata-sections ;
+CXXTUNING  	= -fno-exceptions -fno-strict-aliasing ; 
+CFLAGS  	= -Os -Wall -Wextra -mmcu=$(MCU) $(CTUNING) ;
+CXXFLAGS  	= $(CFLAGS) $(CXXTUNING) ;
+LDFLAGS  	= -Os -lm -Wl,--gc-sections -mmcu=atmega328p ;
+
+# Search everywhere for headers
+HDRS  	 	= $(PROJECT_DIR) $(ARDUINO_AVR) $(ARDUINO_CORE) [ GLOB $(ARDUINO_LIB) $(SKETCH_LIB) : [^.]* ] ;
+
+# Grab everything from the core directory
+CORE_MODULES  	= [ GLOB $(ARDUINO_CORE) : *.c *.cpp ] ;
+
+# Grab everything from libraries.  To avoid this "grab everything" behaviour, you
+# can specify specific modules to pick up in PROJECT_MODULES
+LIB_MODULES  	= [ GLOB $(ARDUINO_LIB)/$(PROJECT_LIBS) $(SKETCH_LIB)/$(PROJECT_LIBS) : *.cpp ] ;
+
+# In addition to explicitly-specified program modules, pick up anything from the current
+# dir.
+PROJECT_MODULES += [ GLOB $(PROJECT_DIR) : *.c *.cpp *.pde ] ;
+
+# Shortcut for the out files
+OUT             = $(OUT_DIR)/$(PROJECT_NAME) ;
+
+# AvrDude setup
+AVRDUDE_FLAGS = -V -F -D -C $(AVRDUDECONFIG_PATH)/avrdude.conf -p $(MCU) -c $(AVRDUDE_PROTOCOL) -b $(UPLOAD_RATE) ;
+
+rule GitVersion
+{
+  Always $(<) ;
+  Depends all : $(<) ;
+}
+
+actions GitVersion
+{
+  echo "const char program_version[] = \"\\" > $(<)
+  git log -1 --pretty=format:%h >> $(<)
+  echo "\";" >> $(<)
+}
+
+GitVersion version.h ;
+
+rule AvrCc
+{
+  Depends $(<) : $(>) ;
+  Depends $(<) : $(<:D) ;
+  Clean clean : $(<) ;
+
+  CCHDRS on $(<) = [ on $(<) FIncludes $(HDRS) ] ;
+  CCDEFS on $(<) = [ on $(<) FDefines $(DEFINES) ] ;
+}
+
+actions AvrCc
+{
+  $(AVR_CC) -c -o $(<) $(CCHDRS) $(CCDEFS) $(CFLAGS) $(>) 
+}
+
+rule AvrC++
+{
+  Depends $(<) : $(>) ;
+  Depends $(<) : $(<:D) ;
+  Clean clean : $(<) ;
+
+  CCHDRS on $(<) = [ on $(<) FIncludes $(HDRS) ] ;
+  CCDEFS on $(<) = [ on $(<) FDefines $(DEFINES) ] ;
+}
+
+actions AvrC++
+{
+  $(AVR_CXX) -c -o $(<) $(CCHDRS) $(CCDEFS) $(CXXFLAGS) $(>) 
+}
+
+rule Pde
+{
+  Depends $(<) : $(>) ;
+  Depends $(<) : $(<:D) ;
+  Clean clean : $(<) ;
+
+}
+
+actions Pde
+{
+  echo "#include <WProgram.h>" > $(<) 
+  echo "#line 1 \"$(>)\"" >> $(<)
+  cat $(>) >> $(<) 
+}
+
+rule AvrPde
+{
+  local _CPP = $(OUT_DIR)/$(_I:B).cpp ;
+  Pde $(_CPP) : $(>) ;
+  AvrC++ $(<) : $(_CPP) ;
+}
+
+rule AvrObject
+{
+  switch $(>:S)
+  {
+    case .c :   AvrCc $(<) : $(>) ;
+    case .cpp : AvrC++ $(<) : $(>) ;
+    case .pde : AvrPde $(<) : $(>) ;
+  }
+}
+
+rule AvrObjects
+{
+  for _I in $(<) 
+  {
+    AvrObject $(OUT_DIR)/$(_I:B).o : $(_I) ;
+  }
+}
+
+rule AvrMainFromObjects
+{
+  Depends $(<) : $(>) ;
+  Depends $(<) : $(<:D) ;
+  MkDir $(<:D) ;
+  Depends all : $(<) ;
+  Clean clean : $(<) ;
+}
+
+actions AvrMainFromObjects
+{
+  $(AVR_LD) $(LDFLAGS) -o $(<) $(>) 
+}
+
+rule AvrMain
+{
+  AvrMainFromObjects $(<) : $(OUT_DIR)/$(>:B).o ;
+  AvrObjects $(>) ;
+}
+
+rule AvrHex
+{
+  Depends $(<) : $(>) ;
+  Depends $(<) : $(<:D) ;
+  Depends hex : $(<) ;
+  Clean clean : $(<) ;
+}
+
+actions AvrHex
+{
+  $(AVR_OBJCOPY) -O ihex -R .eeprom $(>) $(<)
+}
+
+rule AvrUpload
+{
+  Depends $(1) : $(2) ;
+  Depends $(2) : $(3) ;
+  NotFile $(1) ;
+  Always $(1) ;
+  Always $(2) ;
+  AvrUploadAction $(2) : $(3) ;
+}
+
+actions AvrUploadAction
+{
+  $(AVRDUDE) $(AVRDUDE_FLAGS) -P $(<) $(AVRDUDE_WRITE_FLASH) -U flash:w:$(>):i
+}
+
+AvrMain $(OUT).elf : $(CORE_MODULES) $(LIB_MODULES) $(PROJECT_MODULES) ;
+AvrHex $(OUT).hex : $(OUT).elf ;
+
+AvrUpload p6 : /dev/tty.usbserial-A600eHIs : $(OUT).hex ;
+AvrUpload p4 : /dev/tty.usbserial-A40081RP : $(OUT).hex ;
+AvrUpload p9 : /dev/tty.usbserial-A9007LmI : $(OUT).hex ;
+

hardware/digistump/avr/libraries/RF24/examples/pingpair_sleepy/pingpair_sleepy.pde

@@ -0,0 +1,288 @@
+/*
+ Copyright (C) 2011 J. Coliz <maniacbug@ymail.com>
+
+ This program is free software; you can redistribute it and/or
+ modify it under the terms of the GNU General Public License
+ version 2 as published by the Free Software Foundation.
+ */
+
+/**
+ * Example RF Radio Ping Pair which Sleeps between Sends
+ *
+ * This is an example of how to use the RF24 class to create a battery-
+ * efficient system.  It is just like the pingpair.pde example, but the
+ * ping node powers down the radio and sleeps the MCU after every
+ * ping/pong cycle.
+ *
+ * As with the pingpair.pde example, write this sketch to two different nodes,
+ * connect the role_pin to ground on one.  The ping node sends the current
+ * time to the pong node, which responds by sending the value back.  The ping
+ * node can then see how long the whole cycle took.
+ */
+
+#include <SPI.h>
+#include <avr/sleep.h>
+#include <avr/power.h>
+#include "nRF24L01.h"
+#include "RF24.h"
+#include "printf.h"
+
+//
+// Hardware configuration
+//
+
+// Set up nRF24L01 radio on SPI bus plus pins 9 & 10
+
+RF24 radio(9,10);
+
+// sets the role of this unit in hardware.  Connect to GND to be the 'pong' receiver
+// Leave open to be the 'ping' transmitter
+const int role_pin = 7;
+
+//
+// Topology
+//
+
+// Radio pipe addresses for the 2 nodes to communicate.
+const uint64_t pipes[2] = { 0xF0F0F0F0E1LL, 0xF0F0F0F0D2LL };
+
+//
+// Role management
+//
+// Set up role.  This sketch uses the same software for all the nodes
+// in this system.  Doing so greatly simplifies testing.  The hardware itself specifies
+// which node it is.
+//
+// This is done through the role_pin
+//
+
+// The various roles supported by this sketch
+typedef enum { role_ping_out = 1, role_pong_back } role_e;
+
+// The debug-friendly names of those roles
+const char* role_friendly_name[] = { "invalid", "Ping out", "Pong back"};
+
+// The role of the current running sketch
+role_e role;
+
+//
+// Sleep declarations
+//
+
+typedef enum { wdt_16ms = 0, wdt_32ms, wdt_64ms, wdt_128ms, wdt_250ms, wdt_500ms, wdt_1s, wdt_2s, wdt_4s, wdt_8s } wdt_prescalar_e;
+
+void setup_watchdog(uint8_t prescalar);
+void do_sleep(void);
+
+const short sleep_cycles_per_transmission = 4;
+volatile short sleep_cycles_remaining = sleep_cycles_per_transmission;
+
+//
+// Normal operation
+//
+
+void setup(void)
+{
+  //
+  // Role
+  //
+
+  // set up the role pin
+  pinMode(role_pin, INPUT);
+  digitalWrite(role_pin,HIGH);
+  delay(20); // Just to get a solid reading on the role pin
+
+  // read the address pin, establish our role
+  if ( digitalRead(role_pin) )
+    role = role_ping_out;
+  else
+    role = role_pong_back;
+
+  //
+  // Print preamble
+  //
+
+  Serial.begin(57600);
+  printf_begin();
+  printf("\n\rRF24/examples/pingpair_sleepy/\n\r");
+  printf("ROLE: %s\n\r",role_friendly_name[role]);
+
+  //
+  // Prepare sleep parameters
+  //
+
+  // Only the ping out role sleeps.  Wake up every 4s to send a ping
+  if ( role == role_ping_out )
+    setup_watchdog(wdt_1s);
+
+  //
+  // Setup and configure rf radio
+  //
+
+  radio.begin();
+
+  //
+  // Open pipes to other nodes for communication
+  //
+
+  // This simple sketch opens two pipes for these two nodes to communicate
+  // back and forth.
+  // Open 'our' pipe for writing
+  // Open the 'other' pipe for reading, in position #1 (we can have up to 5 pipes open for reading)
+
+  if ( role == role_ping_out )
+  {
+    radio.openWritingPipe(pipes[0]);
+    radio.openReadingPipe(1,pipes[1]);
+  }
+  else
+  {
+    radio.openWritingPipe(pipes[1]);
+    radio.openReadingPipe(1,pipes[0]);
+  }
+
+  //
+  // Start listening
+  //
+
+  radio.startListening();
+
+  //
+  // Dump the configuration of the rf unit for debugging
+  //
+
+  radio.printDetails();
+}
+
+void loop(void)
+{
+  //
+  // Ping out role.  Repeatedly send the current time
+  //
+
+  if (role == role_ping_out)
+  {
+    // First, stop listening so we can talk.
+    radio.stopListening();
+
+    // Take the time, and send it.  This will block until complete
+    unsigned long time = millis();
+    printf("Now sending %lu...",time);
+    radio.write( &time, sizeof(unsigned long) );
+
+    // Now, continue listening
+    radio.startListening();
+
+    // Wait here until we get a response, or timeout (250ms)
+    unsigned long started_waiting_at = millis();
+    bool timeout = false;
+    while ( ! radio.available() && ! timeout )
+      if (millis() - started_waiting_at > 250 )
+        timeout = true;
+
+    // Describe the results
+    if ( timeout )
+    {
+      printf("Failed, response timed out.\n\r");
+    }
+    else
+    {
+      // Grab the response, compare, and send to debugging spew
+      unsigned long got_time;
+      radio.read( &got_time, sizeof(unsigned long) );
+
+      // Spew it
+      printf("Got response %lu, round-trip delay: %lu\n\r",got_time,millis()-got_time);
+    }
+
+    //
+    // Shut down the system
+    //
+
+    // Experiment with some delay here to see if it has an effect
+    delay(500);
+
+    // Power down the radio.  Note that the radio will get powered back up
+    // on the next write() call.
+    radio.powerDown();
+
+    // Sleep the MCU.  The watchdog timer will awaken in a short while, and
+    // continue execution here.
+    while( sleep_cycles_remaining )
+      do_sleep();
+
+    sleep_cycles_remaining = sleep_cycles_per_transmission;
+  }
+
+  //
+  // Pong back role.  Receive each packet, dump it out, and send it back
+  //
+  // This is untouched from the pingpair example.
+  //
+
+  if ( role == role_pong_back )
+  {
+    // if there is data ready
+    if ( radio.available() )
+    {
+      // Dump the payloads until we've gotten everything
+      unsigned long got_time;
+      bool done = false;
+      while (!done)
+      {
+        // Fetch the payload, and see if this was the last one.
+        done = radio.read( &got_time, sizeof(unsigned long) );
+
+        // Spew it.  Include our time, because the ping_out millis counter is unreliable
+        // due to it sleeping
+        printf("Got payload %lu @ %lu...",got_time,millis());
+      }
+
+      // First, stop listening so we can talk
+      radio.stopListening();
+
+      // Send the final one back.
+      radio.write( &got_time, sizeof(unsigned long) );
+      printf("Sent response.\n\r");
+
+      // Now, resume listening so we catch the next packets.
+      radio.startListening();
+    }
+  }
+}
+
+//
+// Sleep helpers
+//
+
+// 0=16ms, 1=32ms,2=64ms,3=125ms,4=250ms,5=500ms
+// 6=1 sec,7=2 sec, 8=4 sec, 9= 8sec
+
+void setup_watchdog(uint8_t prescalar)
+{
+  prescalar = min(9,prescalar);
+  uint8_t wdtcsr = prescalar & 7;
+  if ( prescalar & 8 )
+    wdtcsr |= _BV(WDP3);
+
+  MCUSR &= ~_BV(WDRF);
+  WDTCSR = _BV(WDCE) | _BV(WDE);
+  WDTCSR = _BV(WDCE) | wdtcsr | _BV(WDIE);
+}
+
+ISR(WDT_vect)
+{
+  --sleep_cycles_remaining;
+}
+
+void do_sleep(void)
+{
+  set_sleep_mode(SLEEP_MODE_PWR_DOWN); // sleep mode is set here
+  sleep_enable();
+
+  sleep_mode();                        // System sleeps here
+
+  sleep_disable();                     // System continues execution here when watchdog timed out
+}
+
+// vim:ai:cin:sts=2 sw=2 ft=cpp

hardware/digistump/avr/libraries/RF24/examples/pingpair_sleepy/printf.h

@@ -0,0 +1,37 @@
+/*
+ Copyright (C) 2011 J. Coliz <maniacbug@ymail.com>
+ 
+ This program is free software; you can redistribute it and/or
+ modify it under the terms of the GNU General Public License
+ version 2 as published by the Free Software Foundation.
+ */
+ 
+/**
+ * @file printf.h
+ *
+ * Setup necessary to direct stdout to the Arduino Serial library, which
+ * enables 'printf'
+ */
+
+#ifndef __PRINTF_H__
+#define __PRINTF_H__
+
+#ifdef ARDUINO
+
+int serial_putc( char c, FILE * ) 
+{
+  Serial.write( c );
+
+  return c;
+} 
+
+void printf_begin(void)
+{
+  fdevopen( &serial_putc, 0 );
+}
+
+#else
+#error This example is only for use on Arduino.
+#endif // ARDUINO
+
+#endif // __PRINTF_H__

hardware/digistump/avr/libraries/RF24/examples/scanner/Jamfile

@@ -0,0 +1,210 @@
+# (1) Project Information
+
+PROJECT_LIBS 	= SPI RF24 ; 
+
+# (2) Board Information
+
+UPLOAD_PROTOCOL ?= stk500v1 ;
+UPLOAD_SPEED 	?= 57600 ;
+MCU		?= atmega328p ;
+F_CPU 		?= 16000000 ;
+CORE		?= arduino ;
+VARIANT 	?= standard ;
+ARDUINO_VERSION	?= 100 ;
+
+# (3) USB Ports
+
+PORTS		= p4 p6 p9 u0 u1 u2 ;
+PORT_p6 	= /dev/tty.usbserial-A600eHIs ;
+PORT_p4 	= /dev/tty.usbserial-A40081RP ;
+PORT_p9		= /dev/tty.usbserial-A9007LmI ;
+PORT_u0 	= /dev/ttyUSB0 ;
+PORT_u1 	= /dev/ttyUSB1 ;
+PORT_u2 	= /dev/ttyUSB2 ;
+
+# (4) Location of AVR tools
+#
+# This configuration assumes using avr-tools that were obtained separate from the Arduino
+# distribution. 
+
+if $(OS) = MACOSX 
+{
+	AVR_BIN 	= /usr/local/avrtools/bin ;
+	AVR_ETC 	= /usr/local/avrtools/etc ;
+	AVR_INCLUDE	= /usr/local/avrtools/include ; 
+}
+else
+{
+	AVR_BIN 	= /usr/bin ;
+	AVR_INCLUDE 	= /usr/lib/avr/include ;
+	AVR_ETC 	= /etc ; 
+}
+
+# (5) Directories where Arduino core and libraries are located
+
+ARDUINO_DIR 	?= /opt/Arduino ;
+ARDUINO_CORE 	= $(ARDUINO_DIR)/hardware/arduino/cores/$(CORE) $(ARDUINO_DIR)/hardware/arduino/variants/$(VARIANT) ;
+ARDUINO_LIB 	= $(ARDUINO_DIR)/libraries ;
+SKETCH_LIB      = $(HOME)/Source/Arduino/libraries ;
+
+#
+# --------------------------------------------------
+# Below this line usually never needs to be modified 
+#
+
+# Tool locations
+
+CC	  	= $(AVR_BIN)/avr-gcc ;
+C++	 	= $(AVR_BIN)/avr-g++ ;
+LINK	  	= $(AVR_BIN)/avr-gcc ;
+OBJCOPY 	= $(AVR_BIN)/avr-objcopy ;
+AVRDUDE 	= $(AVR_BIN)/avrdude ;
+
+# Flags
+
+DEFINES  	+= F_CPU=$(F_CPU)L ARDUINO=$(ARDUINO_VERSION) VERSION_H ;
+OPTIM		= -Os ;
+CCFLAGS  	= -Wall -Wextra -mmcu=$(MCU) -ffunction-sections -fdata-sections ;
+C++FLAGS  	= $(CCFLAGS) -fno-exceptions -fno-strict-aliasing ;
+LINKFLAGS  	= $(OPTIM) -lm -Wl,--gc-sections -mmcu=$(MCU) ;
+AVRDUDEFLAGS	= -V -F -D -C $(AVR_ETC)/avrdude.conf -p $(MCU) -c $(UPLOAD_PROTOCOL) -b $(UPLOAD_SPEED) ;
+
+# Search everywhere for headers
+
+HDRS  	 	= $(PWD) $(AVR_INCLUDE) $(ARDUINO_CORE) $(ARDUINO_LIB)/$(PROJECT_LIBS) $(ARDUINO_LIB)/$(PROJECT_LIBS)/utility $(SKETCH_LIB)/$(PROJECT_LIBS) ;
+
+# Output locations
+
+LOCATE_TARGET	= $(F_CPU) ;
+LOCATE_SOURCE	= $(F_CPU) ;
+
+#
+# Custom rules
+#
+
+rule GitVersion
+{
+	Always $(<) ;
+	Depends all : $(<) ;
+}
+
+actions GitVersion
+{
+	echo "const char program_version[] = \"\\" > $(<)
+	git log -1 --pretty=format:%h >> $(<)
+	echo "\";" >> $(<)
+}
+
+GitVersion version.h ;
+
+rule Pde
+{
+	Depends $(<) : $(>) ;
+	MakeLocate $(<) : $(LOCATE_SOURCE) ;
+	Clean clean : $(<) ;
+}
+
+if ( $(ARDUINO_VERSION) < 100 )
+{
+	ARDUINO_H = WProgram.h ;
+}
+else
+{
+	ARDUINO_H = Arduino.h ;
+}
+
+actions Pde
+{
+	echo "#include <$(ARDUINO_H)>" > $(<) 
+	echo "#line 1 \"$(>)\"" >> $(<)
+	cat $(>) >> $(<) 
+}
+
+rule C++Pde
+{
+	local _CPP = $(>:B).cpp ;
+	Pde $(_CPP) : $(>) ;
+	C++ $(<) : $(_CPP) ;
+}
+
+rule UserObject
+{
+	switch $(>:S)
+	{
+		case .ino : C++Pde $(<) : $(>) ;
+		case .pde : C++Pde $(<) : $(>) ;
+	}
+}
+
+rule Objects
+{
+        local _i ;
+
+        for _i in [ FGristFiles $(<) ]
+        {
+		local _b = $(_i:B)$(SUFOBJ) ;
+		local _o = $(_b:G=$(SOURCE_GRIST:E)) ;
+                Object $(_o) : $(_i) ;
+                Depends obj : $(_o) ;
+        }
+}
+
+rule Main
+{
+        MainFromObjects $(<) : $(>:B)$(SUFOBJ) ;
+        Objects $(>) ;
+}
+
+rule Hex
+{
+	Depends $(<) : $(>) ;
+	MakeLocate $(<) : $(LOCATE_TARGET) ;
+	Depends hex : $(<) ;
+	Clean clean : $(<) ;
+}
+
+actions Hex
+{
+	$(OBJCOPY) -O ihex -R .eeprom $(>) $(<)
+}
+
+rule Upload
+{
+	Depends $(1) : $(2) ;
+	Depends $(2) : $(3) ;
+	NotFile $(1) ;
+	Always $(1) ;
+	Always $(2) ;
+	UploadAction $(2) : $(3) ;
+}
+
+actions UploadAction
+{
+	$(AVRDUDE) $(AVRDUDEFLAGS) -P $(<) $(AVRDUDE_WRITE_FLASH) -U flash:w:$(>):i
+}
+
+#
+# Targets
+#
+
+# Grab everything from the core directory
+CORE_MODULES  	= [ GLOB $(ARDUINO_CORE) : *.c *.cpp ] ;
+
+# Grab everything from libraries.  To avoid this "grab everything" behaviour, you
+# can specify specific modules to pick up in PROJECT_MODULES
+LIB_MODULES  	= [ GLOB $(ARDUINO_LIB)/$(PROJECT_LIBS) $(ARDUINO_LIB)/$(PROJECT_LIBS)/utility $(SKETCH_LIB)/$(PROJECT_LIBS) : *.cpp *.c ] ;
+
+# Grab everything from the current dir
+PROJECT_MODULES += [ GLOB $(PWD) : *.c *.cpp *.pde *.ino ] ;
+
+# Main output executable
+MAIN		= $(PWD:B).elf ;
+
+Main $(MAIN) : $(CORE_MODULES) $(LIB_MODULES) $(PROJECT_MODULES) ;
+Hex $(MAIN:B).hex : $(MAIN) ;
+
+# Upload targets
+for _p in $(PORTS)
+{
+	Upload $(_p) : $(PORT_$(_p)) : $(MAIN:B).hex ;
+}

hardware/digistump/avr/libraries/RF24/examples/scanner/printf.h

@@ -0,0 +1,31 @@
+/*
+ Copyright (C) 2011 J. Coliz <maniacbug@ymail.com>
+ 
+ This program is free software; you can redistribute it and/or
+ modify it under the terms of the GNU General Public License
+ version 2 as published by the Free Software Foundation.
+ */
+ 
+/**
+ * @file printf.h
+ *
+ * Setup necessary to direct stdout to the Arduino Serial library, which
+ * enables 'printf'
+ */
+
+#ifndef __PRINTF_H__
+#define __PRINTF_H__
+
+int serial_putc( char c, FILE * ) 
+{
+  Serial.write( c );
+
+  return c;
+} 
+
+void printf_begin(void)
+{
+  fdevopen( &serial_putc, 0 );
+}
+
+#endif // __PRINTF_H__

hardware/digistump/avr/libraries/RF24/examples/scanner/scanner.pde

@@ -0,0 +1,124 @@
+/*
+ Copyright (C) 2011 J. Coliz <maniacbug@ymail.com>
+
+ This program is free software; you can redistribute it and/or
+ modify it under the terms of the GNU General Public License
+ version 2 as published by the Free Software Foundation.
+ */
+
+/**
+ * Channel scanner
+ *
+ * Example to detect interference on the various channels available.
+ * This is a good diagnostic tool to check whether you're picking a
+ * good channel for your application.
+ *
+ * Inspired by cpixip.
+ * See http://arduino.cc/forum/index.php/topic,54795.0.html
+ */
+
+#include <SPI.h>
+#include "nRF24L01.h"
+#include "RF24.h"
+#include "printf.h"
+
+//
+// Hardware configuration
+//
+
+// Set up nRF24L01 radio on SPI bus plus pins 9 & 10
+
+RF24 radio(9,10);
+
+//
+// Channel info
+//
+
+const uint8_t num_channels = 128;
+uint8_t values[num_channels];
+
+//
+// Setup
+//
+
+void setup(void)
+{
+  //
+  // Print preamble
+  //
+
+  Serial.begin(57600);
+  printf_begin();
+  printf("\n\rRF24/examples/scanner/\n\r");
+
+  //
+  // Setup and configure rf radio
+  //
+
+  radio.begin();
+  radio.setAutoAck(false);
+
+  // Get into standby mode
+  radio.startListening();
+  radio.stopListening();
+
+  // Print out header, high then low digit
+  int i = 0;
+  while ( i < num_channels )
+  {
+    printf("%x",i>>4);
+    ++i;
+  }
+  printf("\n\r");
+  i = 0;
+  while ( i < num_channels )
+  {
+    printf("%x",i&0xf);
+    ++i;
+  }
+  printf("\n\r");
+}
+
+//
+// Loop
+//
+
+const int num_reps = 100;
+
+void loop(void)
+{
+  // Clear measurement values
+  memset(values,0,sizeof(values));
+
+  // Scan all channels num_reps times
+  int rep_counter = num_reps;
+  while (rep_counter--)
+  {
+    int i = num_channels;
+    while (i--)
+    {
+      // Select this channel
+      radio.setChannel(i);
+
+      // Listen for a little
+      radio.startListening();
+      delayMicroseconds(128);
+      radio.stopListening();
+
+      // Did we get a carrier?
+      if ( radio.testCarrier() )
+        ++values[i];
+    }
+  }
+
+  // Print out channel measurements, clamped to a single hex digit
+  int i = 0;
+  while ( i < num_channels )
+  {
+    printf("%x",min(0xf,values[i]&0xf));
+    ++i;
+  }
+  printf("\n\r");
+}
+
+// vim:ai:cin:sts=2 sw=2 ft=cpp

hardware/digistump/avr/libraries/RF24/examples/starping/Jamfile

@@ -0,0 +1,206 @@
+PROJECT_NAME 	= $(PWD:B) ;
+PROJECT_DIR 	= . ;
+PROJECT_LIBS    = EEPROM SPI RF24 ; 
+
+OUT_DIR = ojam ;
+F_CPU 		= 16000000 ;
+MCU             = atmega328p ;
+PORTS           = /dev/tty.usbserial-A600eHIs /dev/tty.usbserial-A40081RP /dev/tty.usbserial-A9007LmI ;
+
+UPLOAD_RATE 	= 57600 ;
+AVRDUDE_PROTOCOL = stk500v1 ;
+COM 		= 33 ;
+
+# Host-specific overrides for locations 
+if $(OS) = MACOSX 
+{
+ARDUINO_VERSION	= 22 ;
+OLD_DIR 	= /opt/arduino-0021 ;
+AVR_TOOLS_PATH 	= $(OLD_DIR)/hardware/tools/avr/bin ;
+AVRDUDECONFIG_PATH = $(OLD_DIR)/hardware/tools/avr/etc ;
+ARDUINO_DIR 	= /opt/Arduino ;
+ARDUINO_AVR 	= /usr/lib/avr/include ;
+}
+
+# Where is everything?
+ARDUINO_VERSION	?= 22 ;
+AVR_TOOLS_PATH 	?= /usr/bin ;
+ARDUINO_DIR 	?= /opt/arduino-00$(ARDUINO_VERSION) ;
+ARDUINO_AVR 	?= $(ARDUINO_DIR)/hardware/tools/avr/avr/include/avr ;
+AVRDUDECONFIG_PATH ?= $(ARDUINO_DIR)/hardware/tools ;
+ARDUINO_CORE 	= $(ARDUINO_DIR)/hardware/arduino/cores/arduino ;
+ARDUINO_LIB 	= $(ARDUINO_DIR)/libraries ;
+SKETCH_LIB      = $(HOME)/Source/Arduino/libraries ;
+AVR_CC  	= $(AVR_TOOLS_PATH)/avr-gcc ;
+AVR_CXX  	= $(AVR_TOOLS_PATH)/avr-g++ ;
+AVR_LD  	= $(AVR_TOOLS_PATH)/avr-gcc ;
+AVR_OBJCOPY 	= $(AVR_TOOLS_PATH)/avr-objcopy ;
+AVRDUDE 	= $(AVR_TOOLS_PATH)/avrdude ;
+
+DEFINES  	= F_CPU=$(F_CPU)L ARDUINO=$(ARDUINO_VERSION) VERSION_H ;
+CTUNING  	= -ffunction-sections -fdata-sections ;
+CXXTUNING  	= -fno-exceptions -fno-strict-aliasing ; 
+CFLAGS  	= -Os -Wall -Wextra -mmcu=$(MCU) $(CTUNING) ;
+CXXFLAGS  	= $(CFLAGS) $(CXXTUNING) ;
+LDFLAGS  	= -Os -lm -Wl,--gc-sections -mmcu=atmega328p ;
+
+# Search everywhere for headers
+HDRS  	 	= $(PROJECT_DIR) $(ARDUINO_AVR) $(ARDUINO_CORE) [ GLOB $(ARDUINO_LIB) $(SKETCH_LIB) : [^.]* ] ;
+
+# Grab everything from the core directory
+CORE_MODULES  	= [ GLOB $(ARDUINO_CORE) : *.c *.cpp ] ;
+
+# Grab everything from libraries.  To avoid this "grab everything" behaviour, you
+# can specify specific modules to pick up in PROJECT_MODULES
+LIB_MODULES  	= [ GLOB $(ARDUINO_LIB)/$(PROJECT_LIBS) $(SKETCH_LIB)/$(PROJECT_LIBS) : *.cpp ] ;
+
+# In addition to explicitly-specified program modules, pick up anything from the current
+# dir.
+PROJECT_MODULES += [ GLOB $(PROJECT_DIR) : *.c *.cpp *.pde ] ;
+
+# Shortcut for the out files
+OUT             = $(OUT_DIR)/$(PROJECT_NAME) ;
+
+# AvrDude setup
+AVRDUDE_FLAGS = -V -F -D -C $(AVRDUDECONFIG_PATH)/avrdude.conf -p $(MCU) -c $(AVRDUDE_PROTOCOL) -b $(UPLOAD_RATE) ;
+
+rule GitVersion
+{
+  Always $(<) ;
+  Depends all : $(<) ;
+}
+
+actions GitVersion
+{
+  echo "const char program_version[] = \"\\" > $(<)
+  git log -1 --pretty=format:%h >> $(<)
+  echo "\";" >> $(<)
+}
+
+GitVersion version.h ;
+
+rule AvrCc
+{
+  Depends $(<) : $(>) ;
+  Depends $(<) : $(<:D) ;
+  Clean clean : $(<) ;
+
+  CCHDRS on $(<) = [ on $(<) FIncludes $(HDRS) ] ;
+  CCDEFS on $(<) = [ on $(<) FDefines $(DEFINES) ] ;
+}
+
+actions AvrCc
+{
+  $(AVR_CC) -c -o $(<) $(CCHDRS) $(CCDEFS) $(CFLAGS) $(>) 
+}
+
+rule AvrC++
+{
+  Depends $(<) : $(>) ;
+  Depends $(<) : $(<:D) ;
+  Clean clean : $(<) ;
+
+  CCHDRS on $(<) = [ on $(<) FIncludes $(HDRS) ] ;
+  CCDEFS on $(<) = [ on $(<) FDefines $(DEFINES) ] ;
+}
+
+actions AvrC++
+{
+  $(AVR_CXX) -c -o $(<) $(CCHDRS) $(CCDEFS) $(CXXFLAGS) $(>) 
+}
+
+rule Pde
+{
+  Depends $(<) : $(>) ;
+  Depends $(<) : $(<:D) ;
+  Clean clean : $(<) ;
+
+}
+
+actions Pde
+{
+  echo "#include <WProgram.h>" > $(<) 
+  echo "#line 1 \"$(>)\"" >> $(<)
+  cat $(>) >> $(<) 
+}
+
+rule AvrPde
+{
+  local _CPP = $(OUT_DIR)/$(_I:B).cpp ;
+  Pde $(_CPP) : $(>) ;
+  AvrC++ $(<) : $(_CPP) ;
+}
+
+rule AvrObject
+{
+  switch $(>:S)
+  {
+    case .c :   AvrCc $(<) : $(>) ;
+    case .cpp : AvrC++ $(<) : $(>) ;
+    case .pde : AvrPde $(<) : $(>) ;
+  }
+}
+
+rule AvrObjects
+{
+  for _I in $(<) 
+  {
+    AvrObject $(OUT_DIR)/$(_I:B).o : $(_I) ;
+  }
+}
+
+rule AvrMainFromObjects
+{
+  Depends $(<) : $(>) ;
+  Depends $(<) : $(<:D) ;
+  MkDir $(<:D) ;
+  Depends all : $(<) ;
+  Clean clean : $(<) ;
+}
+
+actions AvrMainFromObjects
+{
+  $(AVR_LD) $(LDFLAGS) -o $(<) $(>) 
+}
+
+rule AvrMain
+{
+  AvrMainFromObjects $(<) : $(OUT_DIR)/$(>:B).o ;
+  AvrObjects $(>) ;
+}
+
+rule AvrHex
+{
+  Depends $(<) : $(>) ;
+  Depends $(<) : $(<:D) ;
+  Depends hex : $(<) ;
+  Clean clean : $(<) ;
+}
+
+actions AvrHex
+{
+  $(AVR_OBJCOPY) -O ihex -R .eeprom $(>) $(<)
+}
+
+rule AvrUpload
+{
+  Depends $(1) : $(2) ;
+  Depends $(2) : $(3) ;
+  NotFile $(1) ;
+  Always $(1) ;
+  Always $(2) ;
+  AvrUploadAction $(2) : $(3) ;
+}
+
+actions AvrUploadAction
+{
+  $(AVRDUDE) $(AVRDUDE_FLAGS) -P $(<) $(AVRDUDE_WRITE_FLASH) -U flash:w:$(>):i
+}
+
+AvrMain $(OUT).elf : $(CORE_MODULES) $(LIB_MODULES) $(PROJECT_MODULES) ;
+AvrHex $(OUT).hex : $(OUT).elf ;
+
+AvrUpload p6 : /dev/tty.usbserial-A600eHIs : $(OUT).hex ;
+AvrUpload p4 : /dev/tty.usbserial-A40081RP : $(OUT).hex ;
+AvrUpload p9 : /dev/tty.usbserial-A9007LmI : $(OUT).hex ;
+

hardware/digistump/avr/libraries/RF24/examples/starping/printf.h

@@ -0,0 +1,37 @@
+/*
+ Copyright (C) 2011 J. Coliz <maniacbug@ymail.com>
+ 
+ This program is free software; you can redistribute it and/or
+ modify it under the terms of the GNU General Public License
+ version 2 as published by the Free Software Foundation.
+ */
+ 
+/**
+ * @file printf.h
+ *
+ * Setup necessary to direct stdout to the Arduino Serial library, which
+ * enables 'printf'
+ */
+
+#ifndef __PRINTF_H__
+#define __PRINTF_H__
+
+#ifdef ARDUINO
+
+int serial_putc( char c, FILE * ) 
+{
+  Serial.write( c );
+
+  return c;
+} 
+
+void printf_begin(void)
+{
+  fdevopen( &serial_putc, 0 );
+}
+
+#else
+#error This example is only for use on Arduino.
+#endif // ARDUINO
+
+#endif // __PRINTF_H__

hardware/digistump/avr/libraries/RF24/examples/starping/starping.pde

@@ -0,0 +1,293 @@
+/*
+ Copyright (C) 2011 J. Coliz <maniacbug@ymail.com>
+
+ This program is free software; you can redistribute it and/or
+ modify it under the terms of the GNU General Public License
+ version 2 as published by the Free Software Foundation.
+ */
+
+/**
+ * Example RF Radio Ping Star Group
+ *
+ * This sketch is a more complex example of using the RF24 library for Arduino.
+ * Deploy this on up to six nodes.  Set one as the 'pong receiver' by tying the
+ * role_pin low, and the others will be 'ping transmit' units.  The ping units
+ * unit will send out the value of millis() once a second.  The pong unit will
+ * respond back with a copy of the value.  Each ping unit can get that response
+ * back, and determine how long the whole cycle took.
+ *
+ * This example requires a bit more complexity to determine which unit is which.
+ * The pong receiver is identified by having its role_pin tied to ground.
+ * The ping senders are further differentiated by a byte in eeprom.
+ */
+
+#include <SPI.h>
+#include <EEPROM.h>
+#include "nRF24L01.h"
+#include "RF24.h"
+#include "printf.h"
+
+//
+// Hardware configuration
+//
+
+// Set up nRF24L01 radio on SPI bus plus pins 9 & 10
+
+RF24 radio(9,10);
+
+// sets the role of this unit in hardware.  Connect to GND to be the 'pong' receiver
+// Leave open to be the 'pong' receiver.
+const int role_pin = 7;
+
+//
+// Topology
+//
+
+// Radio pipe addresses for the nodes to communicate.  Only ping nodes need
+// dedicated pipes in this topology.  Each ping node has a talking pipe
+// that it will ping into, and a listening pipe that it will listen for
+// the pong.  The pong node listens on all the ping node talking pipes
+// and sends the pong back on the sending node's specific listening pipe.
+
+const uint64_t talking_pipes[5] = { 0xF0F0F0F0D2LL, 0xF0F0F0F0C3LL, 0xF0F0F0F0B4LL, 0xF0F0F0F0A5LL, 0xF0F0F0F096LL };
+const uint64_t listening_pipes[5] = { 0x3A3A3A3AD2LL, 0x3A3A3A3AC3LL, 0x3A3A3A3AB4LL, 0x3A3A3A3AA5LL, 0x3A3A3A3A96LL };
+
+//
+// Role management
+//
+// Set up role.  This sketch uses the same software for all the nodes
+// in this system.  Doing so greatly simplifies testing.  The hardware itself specifies
+// which node it is.
+//
+// This is done through the role_pin
+//
+
+// The various roles supported by this sketch
+typedef enum { role_invalid = 0, role_ping_out, role_pong_back } role_e;
+
+// The debug-friendly names of those roles
+const char* role_friendly_name[] = { "invalid", "Ping out", "Pong back"};
+
+// The role of the current running sketch
+role_e role;
+
+//
+// Address management
+//
+
+// Where in EEPROM is the address stored?
+const uint8_t address_at_eeprom_location = 0;
+
+// What is our address (SRAM cache of the address from EEPROM)
+// Note that zero is an INVALID address.  The pong back unit takes address
+// 1, and the rest are 2-6
+uint8_t node_address;
+
+void setup(void)
+{
+  //
+  // Role
+  //
+
+  // set up the role pin
+  pinMode(role_pin, INPUT);
+  digitalWrite(role_pin,HIGH);
+  delay(20); // Just to get a solid reading on the role pin
+
+  // read the address pin, establish our role
+  if ( digitalRead(role_pin) )
+    role = role_ping_out;
+  else
+    role = role_pong_back;
+
+  //
+  // Address
+  //
+
+  if ( role == role_pong_back )
+    node_address = 1;
+  else
+  {
+    // Read the address from EEPROM
+    uint8_t reading = EEPROM.read(address_at_eeprom_location);
+
+    // If it is in a valid range for node addresses, it is our
+    // address.
+    if ( reading >= 2 && reading <= 6 )
+      node_address = reading;
+
+    // Otherwise, it is invalid, so set our address AND ROLE to 'invalid'
+    else
+    {
+      node_address = 0;
+      role = role_invalid;
+    }
+  }
+
+  //
+  // Print preamble
+  //
+
+  Serial.begin(57600);
+  printf_begin();
+  printf("\n\rRF24/examples/starping/\n\r");
+  printf("ROLE: %s\n\r",role_friendly_name[role]);
+  printf("ADDRESS: %i\n\r",node_address);
+
+  //
+  // Setup and configure rf radio
+  //
+
+  radio.begin();
+
+  //
+  // Open pipes to other nodes for communication
+  //
+
+  // The pong node listens on all the ping node talking pipes
+  // and sends the pong back on the sending node's specific listening pipe.
+  if ( role == role_pong_back )
+  {
+    radio.openReadingPipe(1,talking_pipes[0]);
+    radio.openReadingPipe(2,talking_pipes[1]);
+    radio.openReadingPipe(3,talking_pipes[2]);
+    radio.openReadingPipe(4,talking_pipes[3]);
+    radio.openReadingPipe(5,talking_pipes[4]);
+  }
+
+  // Each ping node has a talking pipe that it will ping into, and a listening
+  // pipe that it will listen for the pong.
+  if ( role == role_ping_out )
+  {
+    // Write on our talking pipe
+    radio.openWritingPipe(talking_pipes[node_address-2]);
+    // Listen on our listening pipe
+    radio.openReadingPipe(1,listening_pipes[node_address-2]);
+  }
+
+  //
+  // Start listening
+  //
+
+  radio.startListening();
+
+  //
+  // Dump the configuration of the rf unit for debugging
+  //
+
+  radio.printDetails();
+
+  //
+  // Prompt the user to assign a node address if we don't have one
+  //
+
+  if ( role == role_invalid )
+  {
+    printf("\n\r*** NO NODE ADDRESS ASSIGNED *** Send 1 through 6 to assign an address\n\r");
+  }
+}
+
+void loop(void)
+{
+  //
+  // Ping out role.  Repeatedly send the current time
+  //
+
+  if (role == role_ping_out)
+  {
+    // First, stop listening so we can talk.
+    radio.stopListening();
+
+    // Take the time, and send it.  This will block until complete
+    unsigned long time = millis();
+    printf("Now sending %lu...",time);
+    radio.write( &time, sizeof(unsigned long) );
+
+    // Now, continue listening
+    radio.startListening();
+
+    // Wait here until we get a response, or timeout (250ms)
+    unsigned long started_waiting_at = millis();
+    bool timeout = false;
+    while ( ! radio.available() && ! timeout )
+      if (millis() - started_waiting_at > 250 )
+        timeout = true;
+
+    // Describe the results
+    if ( timeout )
+    {
+      printf("Failed, response timed out.\n\r");
+    }
+    else
+    {
+      // Grab the response, compare, and send to debugging spew
+      unsigned long got_time;
+      radio.read( &got_time, sizeof(unsigned long) );
+
+      // Spew it
+      printf("Got response %lu, round-trip delay: %lu\n\r",got_time,millis()-got_time);
+    }
+
+    // Try again 1s later
+    delay(1000);
+  }
+
+  //
+  // Pong back role.  Receive each packet, dump it out, and send it back
+  //
+
+  if ( role == role_pong_back )
+  {
+    // if there is data ready
+    uint8_t pipe_num;
+    if ( radio.available(&pipe_num) )
+    {
+      // Dump the payloads until we've gotten everything
+      unsigned long got_time;
+      bool done = false;
+      while (!done)
+      {
+        // Fetch the payload, and see if this was the last one.
+        done = radio.read( &got_time, sizeof(unsigned long) );
+
+        // Spew it
+        printf("Got payload %lu from node %i...",got_time,pipe_num+1);
+      }
+
+      // First, stop listening so we can talk
+      radio.stopListening();
+
+      // Open the correct pipe for writing
+      radio.openWritingPipe(listening_pipes[pipe_num-1]);
+
+      // Retain the low 2 bytes to identify the pipe for the spew
+      uint16_t pipe_id = listening_pipes[pipe_num-1] & 0xffff;
+
+      // Send the final one back.
+      radio.write( &got_time, sizeof(unsigned long) );
+      printf("Sent response to %04x.\n\r",pipe_id);
+
+      // Now, resume listening so we catch the next packets.
+      radio.startListening();
+    }
+  }
+
+  //
+  // Listen for serial input, which is how we set the address
+  //
+  if (Serial.available())
+  {
+    // If the character on serial input is in a valid range...
+    char c = Serial.read();
+    if ( c >= '1' && c <= '6' )
+    {
+      // It is our address
+      EEPROM.write(address_at_eeprom_location,c-'0');
+
+      // And we are done right now (no easy way to soft reset)
+      printf("\n\rManually reset address to: %c\n\rPress RESET to continue!",c);
+      while(1) ;
+    }
+  }
+}
+// vim:ai:ci sts=2 sw=2 ft=cpp