mirror of
https://github.com/digistump/DigistumpArduino.git
synced 2025-04-27 15:19:02 -07:00
161 lines
3.5 KiB
C
161 lines
3.5 KiB
C
/*
|
|
wiring_digital.c - digital input and output functions
|
|
Part of Arduino - http://www.arduino.cc/
|
|
|
|
Copyright (c) 2005-2006 David A. Mellis
|
|
|
|
This library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
This library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General
|
|
Public License along with this library; if not, write to the
|
|
Free Software Foundation, Inc., 59 Temple Place, Suite 330,
|
|
Boston, MA 02111-1307 USA
|
|
|
|
$Id: wiring.c 248 2007-02-03 15:36:30Z mellis $
|
|
|
|
Modified 28-08-2009 for attiny84 R.Wiersma
|
|
Modified 14-10-2009 for attiny45 Saposoft
|
|
*/
|
|
|
|
#define ARDUINO_MAIN
|
|
#include "wiring_private.h"
|
|
#include "pins_arduino.h"
|
|
|
|
void pinMode(uint8_t pin, uint8_t mode)
|
|
{
|
|
uint8_t bit = digitalPinToBitMask(pin);
|
|
uint8_t port = digitalPinToPort(pin);
|
|
volatile uint8_t *reg, *out;
|
|
|
|
if (port == NOT_A_PIN) return;
|
|
|
|
reg = portModeRegister(port);
|
|
out = portOutputRegister(port);
|
|
|
|
if (mode == INPUT) {
|
|
uint8_t oldSREG = SREG;
|
|
cli();
|
|
*reg &= ~bit;
|
|
*out &= ~bit;
|
|
SREG = oldSREG;
|
|
} else if (mode == INPUT_PULLUP) {
|
|
uint8_t oldSREG = SREG;
|
|
cli();
|
|
*reg &= ~bit;
|
|
*out |= bit;
|
|
SREG = oldSREG;
|
|
} else {
|
|
uint8_t oldSREG = SREG;
|
|
cli();
|
|
*reg |= bit;
|
|
SREG = oldSREG;
|
|
}
|
|
}
|
|
|
|
static void turnOffPWM(uint8_t timer)
|
|
{
|
|
#if defined(TCCR0A) && defined(COM0A1)
|
|
if( timer == TIMER0A){
|
|
cbi(TCCR0A, COM0A1);
|
|
cbi(TCCR0A, COM0A0);
|
|
} else
|
|
#endif
|
|
|
|
#if defined(TCCR0A) && defined(COM0B1)
|
|
if( timer == TIMER0B){
|
|
cbi(TCCR0A, COM0B1);
|
|
cbi(TCCR0A, COM0B0);
|
|
} else
|
|
#endif
|
|
|
|
#if defined(TCCR1A) && defined(COM1A1)
|
|
if( timer == TIMER1A){
|
|
cbi(TCCR1A, COM1A1);
|
|
cbi(TCCR1A, COM1A0);
|
|
} else
|
|
#endif
|
|
|
|
#if defined(TCCR1) && defined(COM1A1)
|
|
if(timer == TIMER1A){
|
|
cbi(TCCR1, COM1A1);
|
|
cbi(TCCR1, COM1A0);
|
|
#ifdef OC1AX
|
|
cbi(TCCR1D, OC1AX);
|
|
#endif
|
|
} else
|
|
#endif
|
|
|
|
#if defined(TCCR1A) && defined(COM1B1)
|
|
if( timer == TIMER1B){
|
|
cbi(TCCR1A, COM1B1);
|
|
cbi(TCCR1A, COM1B0);
|
|
#ifdef OC1BV
|
|
cbi(TCCR1D, OC1BV);
|
|
#endif
|
|
} else
|
|
#endif
|
|
|
|
#if defined(TCCR1) && defined(COM1B1)
|
|
if( timer == TIMER1B){
|
|
cbi(GTCCR, COM1B1);
|
|
cbi(GTCCR, COM1B0);
|
|
} else
|
|
#endif
|
|
|
|
{
|
|
}
|
|
|
|
}
|
|
|
|
void digitalWrite(uint8_t pin, uint8_t val)
|
|
{
|
|
uint8_t timer = digitalPinToTimer(pin);
|
|
uint8_t bit = digitalPinToBitMask(pin);
|
|
uint8_t port = digitalPinToPort(pin);
|
|
volatile uint8_t *out;
|
|
|
|
if (port == NOT_A_PIN) return;
|
|
|
|
// If the pin that support PWM output, we need to turn it off
|
|
// before doing a digital write.
|
|
if (timer != NOT_ON_TIMER) turnOffPWM(timer);
|
|
|
|
out = portOutputRegister(port);
|
|
|
|
if (val == LOW) {
|
|
uint8_t oldSREG = SREG;
|
|
cli();
|
|
*out &= ~bit;
|
|
SREG = oldSREG;
|
|
} else {
|
|
uint8_t oldSREG = SREG;
|
|
cli();
|
|
*out |= bit;
|
|
SREG = oldSREG;
|
|
}
|
|
}
|
|
|
|
int digitalRead(uint8_t pin)
|
|
{
|
|
uint8_t timer = digitalPinToTimer(pin);
|
|
uint8_t bit = digitalPinToBitMask(pin);
|
|
uint8_t port = digitalPinToPort(pin);
|
|
|
|
if (port == NOT_A_PIN) return LOW;
|
|
|
|
// If the pin that support PWM output, we need to turn it off
|
|
// before getting a digital reading.
|
|
if (timer != NOT_ON_TIMER) turnOffPWM(timer);
|
|
|
|
if (*portInputRegister(port) & bit) return HIGH;
|
|
return LOW;
|
|
}
|