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Diffstat (limited to 'core/arduino/wiring_analog.c')
-rwxr-xr-x | core/arduino/wiring_analog.c | 110 |
1 files changed, 0 insertions, 110 deletions
diff --git a/core/arduino/wiring_analog.c b/core/arduino/wiring_analog.c deleted file mode 100755 index 0ab32eb..0000000 --- a/core/arduino/wiring_analog.c +++ /dev/null @@ -1,110 +0,0 @@ -/* - wiring_analog.c - analog input and output - 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 $ -*/ - -#include "wiring_private.h" -#include "pins_arduino.h" - -int analogRead(uint8_t pin) -{ - uint8_t low, high, ch = analogInPinToBit(pin); - - // the low 4 bits of ADMUX select the ADC channel - ADMUX = (ADMUX & (unsigned int) 0xf0) | (ch & (unsigned int) 0x0f); - - // without a delay, we seem to read from the wrong channel - //delay(1); - - // start the conversion - sbi(ADCSRA, ADSC); - - // ADSC is cleared when the conversion finishes - while (bit_is_set(ADCSRA, ADSC)); - - // we have to read ADCL first; doing so locks both ADCL - // and ADCH until ADCH is read. reading ADCL second would - // cause the results of each conversion to be discarded, - // as ADCL and ADCH would be locked when it completed. - low = ADCL; - high = ADCH; - - // combine the two bytes - return (high << 8) | low; -} - -// Right now, PWM output only works on the pins with -// hardware support. These are defined in the appropriate -// pins_*.c file. For the rest of the pins, we default -// to digital output. -void analogWrite(uint8_t pin, int val) -{ - // We need to make sure the PWM output is enabled for those pins - // that support it, as we turn it off when digitally reading or - // writing with them. Also, make sure the pin is in output mode - // for consistenty with Wiring, which doesn't require a pinMode - // call for the analog output pins. - pinMode(pin, OUTPUT); - - if (digitalPinToTimer(pin) == TIMER1A) { - // connect pwm to pin on timer 1, channel A - sbi(TCCR1A, COM1A1); - // set pwm duty - OCR1A = val; - } else if (digitalPinToTimer(pin) == TIMER1B) { - // connect pwm to pin on timer 1, channel B - sbi(TCCR1A, COM1B1); - // set pwm duty - OCR1B = val; -#if defined(__AVR_ATmega168__) - } else if (digitalPinToTimer(pin) == TIMER0A) { - // connect pwm to pin on timer 0, channel A - sbi(TCCR0A, COM0A1); - // set pwm duty - OCR0A = val; - } else if (digitalPinToTimer(pin) == TIMER0B) { - // connect pwm to pin on timer 0, channel B - sbi(TCCR0A, COM0B1); - // set pwm duty - OCR0B = val; - } else if (digitalPinToTimer(pin) == TIMER2A) { - // connect pwm to pin on timer 2, channel A - sbi(TCCR2A, COM2A1); - // set pwm duty - OCR2A = val; - } else if (digitalPinToTimer(pin) == TIMER2B) { - // connect pwm to pin on timer 2, channel B - sbi(TCCR2A, COM2B1); - // set pwm duty - OCR2B = val; -#else - } else if (digitalPinToTimer(pin) == TIMER2) { - // connect pwm to pin on timer 2, channel B - sbi(TCCR2, COM21); - // set pwm duty - OCR2 = val; -#endif - } else if (val < 128) - digitalWrite(pin, LOW); - else - digitalWrite(pin, HIGH); -} |