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Diffstat (limited to 'cores/arduino/wiring_analog.c')
| -rwxr-xr-x | cores/arduino/wiring_analog.c | 179 |
1 files changed, 0 insertions, 179 deletions
diff --git a/cores/arduino/wiring_analog.c b/cores/arduino/wiring_analog.c deleted file mode 100755 index 529ad52..0000000 --- a/cores/arduino/wiring_analog.c +++ /dev/null @@ -1,179 +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" - -uint8_t analog_reference = DEFAULT; - -void analogReference(uint8_t mode) -{ - // can't actually set the register here because the default setting - // will connect AVCC and the AREF pin, which would cause a short if - // there's something connected to AREF. - analog_reference = mode; -} - -int analogRead(uint8_t pin) -{ - uint8_t low, high; - - // set the analog reference (high two bits of ADMUX) and select the - // channel (low 4 bits). this also sets ADLAR (left-adjust result) - // to 0 (the default). - ADMUX = (analog_reference << 6) | (pin & 0x07); - -#if defined(__AVR_ATmega1280__) - // the MUX5 bit of ADCSRB selects whether we're reading from channels - // 0 to 7 (MUX5 low) or 8 to 15 (MUX5 high). - ADCSRB = (ADCSRB & ~(1 << MUX5)) | (((pin >> 3) & 0x01) << MUX5); -#endif - - // 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_ATmega8__) - } else if (digitalPinToTimer(pin) == TIMER2) { - // connect pwm to pin on timer 2, channel B - sbi(TCCR2, COM21); - // set pwm duty - OCR2 = val; -#else - } else if (digitalPinToTimer(pin) == TIMER0A) { - if (val == 0) { - digitalWrite(pin, LOW); - } else { - // connect pwm to pin on timer 0, channel A - sbi(TCCR0A, COM0A1); - // set pwm duty - OCR0A = val; - } - } else if (digitalPinToTimer(pin) == TIMER0B) { - if (val == 0) { - digitalWrite(pin, LOW); - } else { - // 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; -#endif -#if defined(__AVR_ATmega1280__) - // XXX: need to handle other timers here - } else if (digitalPinToTimer(pin) == TIMER3A) { - // connect pwm to pin on timer 3, channel A - sbi(TCCR3A, COM3A1); - // set pwm duty - OCR3A = val; - } else if (digitalPinToTimer(pin) == TIMER3B) { - // connect pwm to pin on timer 3, channel B - sbi(TCCR3A, COM3B1); - // set pwm duty - OCR3B = val; - } else if (digitalPinToTimer(pin) == TIMER3C) { - // connect pwm to pin on timer 3, channel C - sbi(TCCR3A, COM3C1); - // set pwm duty - OCR3C = val; - } else if (digitalPinToTimer(pin) == TIMER4A) { - // connect pwm to pin on timer 4, channel A - sbi(TCCR4A, COM4A1); - // set pwm duty - OCR4A = val; - } else if (digitalPinToTimer(pin) == TIMER4B) { - // connect pwm to pin on timer 4, channel B - sbi(TCCR4A, COM4B1); - // set pwm duty - OCR4B = val; - } else if (digitalPinToTimer(pin) == TIMER4C) { - // connect pwm to pin on timer 4, channel C - sbi(TCCR4A, COM4C1); - // set pwm duty - OCR4C = val; - } else if (digitalPinToTimer(pin) == TIMER5A) { - // connect pwm to pin on timer 5, channel A - sbi(TCCR5A, COM5A1); - // set pwm duty - OCR5A = val; - } else if (digitalPinToTimer(pin) == TIMER5B) { - // connect pwm to pin on timer 5, channel B - sbi(TCCR5A, COM5B1); - // set pwm duty - OCR5B = val; -#endif - } else if (val < 128) - digitalWrite(pin, LOW); - else - digitalWrite(pin, HIGH); -} |