abdf6f8c6b
Now the necessary settings are in adc.h. Refactored to allow repeated ADC reads without reinitialization. Arduino allows setting analogReference, this is now also implemented. ADC is now initialized to sane values in apps/arduino/arduino-process.c dev/arduino/arduino-compat.h now has all hardware independent settings for arduino (some moved from platform/osd-merkur/dev/hw-arduino.h). turnOffPWM re-implemented with hw_timer, removed from wiring_digital.c ADC-specific arduino stuff moved to arduino-compat.h Arduinos wiring_analog no longer necessary. arduino-sketch example now reads analog inputs 1 and 5 using analogRead.
104 lines
2.6 KiB
C
104 lines
2.6 KiB
C
/*
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wiring_digital.c - digital input and output functions
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Part of Arduino - http://www.arduino.cc/
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Copyright (c) 2005-2006 David A. Mellis
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General
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Public License along with this library; if not, write to the
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Free Software Foundation, Inc., 59 Temple Place, Suite 330,
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Boston, MA 02111-1307 USA
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Modified 28 September 2010 by Mark Sproul
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$Id: wiring.c 248 2007-02-03 15:36:30Z mellis $
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*/
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#define ARDUINO_MAIN
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#include "wiring_private.h"
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#include "pins_arduino.h"
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void pinMode(uint8_t pin, uint8_t mode)
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{
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uint8_t bit = digitalPinToBitMask(pin);
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uint8_t port = digitalPinToPort(pin);
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volatile uint8_t *reg, *out;
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if (port == NOT_A_PIN) return;
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// JWS: can I let the optimizer do this?
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reg = portModeRegister(port);
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out = portOutputRegister(port);
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if (mode == INPUT) {
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uint8_t oldSREG = SREG;
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cli();
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*reg &= ~bit;
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*out &= ~bit;
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SREG = oldSREG;
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} else if (mode == INPUT_PULLUP) {
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uint8_t oldSREG = SREG;
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cli();
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*reg &= ~bit;
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*out |= bit;
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SREG = oldSREG;
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} else {
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uint8_t oldSREG = SREG;
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cli();
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*reg |= bit;
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SREG = oldSREG;
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}
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}
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void digitalWrite(uint8_t pin, uint8_t val)
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{
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uint8_t timer = digitalPinToTimer(pin);
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uint8_t bit = digitalPinToBitMask(pin);
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uint8_t port = digitalPinToPort(pin);
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volatile uint8_t *out;
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if (port == NOT_A_PIN) return;
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// If the pin that support PWM output, we need to turn it off
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// before doing a digital write.
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if (timer != NOT_ON_TIMER) turnOffPWM(timer);
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out = portOutputRegister(port);
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uint8_t oldSREG = SREG;
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cli();
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if (val == LOW) {
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*out &= ~bit;
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} else {
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*out |= bit;
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}
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SREG = oldSREG;
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}
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int digitalRead(uint8_t pin)
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{
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uint8_t timer = digitalPinToTimer(pin);
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uint8_t bit = digitalPinToBitMask(pin);
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uint8_t port = digitalPinToPort(pin);
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if (port == NOT_A_PIN) return LOW;
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// If the pin that support PWM output, we need to turn it off
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// before getting a digital reading.
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if (timer != NOT_ON_TIMER) turnOffPWM(timer);
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if (*portInputRegister(port) & bit) return HIGH;
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return LOW;
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}
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