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/DigisparkRGB/DigisparkRGB.cpp

@@ -0,0 +1,78 @@
+#include <avr/io.h>
+#include <util/delay.h>
+#include <avr/interrupt.h>
+
+#include "DigisparkRGB.h"
+#include "Arduino.h"
+
+#define set(x) |= (1<<x) 
+#define clr(x) &=~(1<<x) 
+#define inv(x) ^=(1<<x)
+
+#define BLUE_CLEAR (pinlevelB &= ~(1 << BLUE)) // map BLUE to PB2
+#define GREEN_CLEAR (pinlevelB &= ~(1 << GREEN)) // map BLUE to PB2
+#define RED_CLEAR (pinlevelB &= ~(1 << RED)) // map BLUE to PB2
+#define PORTB_MASK  (1 << PB0) | (1 << PB1) | (1 << PB2)
+#define BLUE PB2
+#define GREEN PB1
+#define RED PB0
+
+
+unsigned char DigisparkPWMcompare[3]; 
+volatile unsigned char DigisparkPWMcompbuff[3];
+
+void DigisparkRGBBegin() {                
+
+  pinMode(2, OUTPUT); 
+  pinMode(1, OUTPUT); 
+  pinMode(0, OUTPUT); 
+  //CLKPR = (1 << CLKPCE);        // enable clock prescaler update
+  //CLKPR = 0;                    // set clock to maximum (= crystal)
+
+
+  DigisparkPWMcompare[0] = 0x00;// set default PWM values
+  DigisparkPWMcompare[1] = 0x00;// set default PWM values
+  DigisparkPWMcompare[2] = 0x00;// set default PWM values
+  DigisparkPWMcompbuff[0] = 0x00;// set default PWM values
+  DigisparkPWMcompbuff[1] = 0x00;// set default PWM values
+  DigisparkPWMcompbuff[2] = 0x00;// set default PWM values
+  
+
+  TIFR = (1 << TOV0);           // clear interrupt flag
+  TIMSK = (1 << TOIE0);         // enable overflow interrupt
+  TCCR0B = (1 << CS00);         // start timer, no prescale
+
+  sei(); 
+}
+
+void DigisparkRGB(int pin,int value){
+	DigisparkPWMcompbuff[pin] = value;
+}
+
+void DigisparkRGBDelay(int ms) {
+  while (ms) {
+    _delay_ms(1);
+    ms--;
+  }
+}
+
+ISR (TIM0_OVF_vect) {
+  static unsigned char pinlevelB=PORTB_MASK;
+  static unsigned char softcount=0xFF;
+
+  PORTB = pinlevelB;            // update outputs
+  
+  if(++softcount == 0){         // increment modulo 256 counter and update
+                                // the compare values only when counter = 0.
+    DigisparkPWMcompare[0] = DigisparkPWMcompbuff[0]; // verbose code for speed
+    DigisparkPWMcompare[1] = DigisparkPWMcompbuff[1]; // verbose code for speed
+    DigisparkPWMcompare[2] = DigisparkPWMcompbuff[2]; // verbose code for speed
+
+    pinlevelB = PORTB_MASK;     // set all port pins high
+  }
+  // clear port pin on compare match (executed on next interrupt)
+  if(DigisparkPWMcompare[0] == softcount) RED_CLEAR;
+  if(DigisparkPWMcompare[1] == softcount) GREEN_CLEAR;
+  if(DigisparkPWMcompare[2] == softcount) BLUE_CLEAR;
+}
+