diff options
author | HampusM <hampus@hampusmat.com> | 2022-03-07 13:48:57 +0100 |
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committer | HampusM <hampus@hampusmat.com> | 2022-03-07 13:48:57 +0100 |
commit | 563f69b870a7f71026c50605b531ed40d667b0a2 (patch) | |
tree | f9dd8374cae6affb3b52d79e22823c78187b99ed /cores/arduino/wiring_analog.c | |
parent | f4a2dc0440d17e4c9e609e01e12fcd786d268cf7 (diff) |
Diffstat (limited to 'cores/arduino/wiring_analog.c')
-rw-r--r-- | cores/arduino/wiring_analog.c | 286 |
1 files changed, 0 insertions, 286 deletions
diff --git a/cores/arduino/wiring_analog.c b/cores/arduino/wiring_analog.c deleted file mode 100644 index 0de64f7..0000000 --- a/cores/arduino/wiring_analog.c +++ /dev/null @@ -1,286 +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 - - Modified 28 September 2010 by Mark Sproul -*/ - -#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) -{ - -#if defined(analogPinToChannel) -#if defined(__AVR_ATmega32U4__) - if (pin >= 18) pin -= 18; // allow for channel or pin numbers -#endif - pin = analogPinToChannel(pin); -#elif defined(__AVR_ATmega1280__) || defined(__AVR_ATmega2560__) - if (pin >= 54) pin -= 54; // allow for channel or pin numbers -#elif defined(__AVR_ATmega32U4__) - if (pin >= 18) pin -= 18; // allow for channel or pin numbers -#elif defined(__AVR_ATmega1284__) || defined(__AVR_ATmega1284P__) || defined(__AVR_ATmega644__) || defined(__AVR_ATmega644A__) || defined(__AVR_ATmega644P__) || defined(__AVR_ATmega644PA__) - if (pin >= 24) pin -= 24; // allow for channel or pin numbers -#else - if (pin >= 14) pin -= 14; // allow for channel or pin numbers -#endif - -#if defined(ADCSRB) && defined(MUX5) - // 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 - - // 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). -#if defined(ADMUX) -#if defined(__AVR_ATtiny25__) || defined(__AVR_ATtiny45__) || defined(__AVR_ATtiny85__) - ADMUX = (analog_reference << 4) | (pin & 0x07); -#else - ADMUX = (analog_reference << 6) | (pin & 0x07); -#endif -#endif - - // without a delay, we seem to read from the wrong channel - //delay(1); - -#if defined(ADCSRA) && defined(ADC) - // start the conversion - sbi(ADCSRA, ADSC); - - // ADSC is cleared when the conversion finishes - while (bit_is_set(ADCSRA, ADSC)); - - // ADC macro takes care of reading ADC register. - // avr-gcc implements the proper reading order: ADCL is read first. - return ADC; -#else - // we dont have an ADC, return 0 - return 0; -#endif -} - -// 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 (val == 0) - { - digitalWrite(pin, LOW); - } - else if (val == 255) - { - digitalWrite(pin, HIGH); - } - else - { - switch(digitalPinToTimer(pin)) - { - // XXX fix needed for atmega8 - #if defined(TCCR0) && defined(COM00) && !defined(__AVR_ATmega8__) - case TIMER0A: - // connect pwm to pin on timer 0 - sbi(TCCR0, COM00); - OCR0 = val; // set pwm duty - break; - #endif - - #if defined(TCCR0A) && defined(COM0A1) - case TIMER0A: - // connect pwm to pin on timer 0, channel A - sbi(TCCR0A, COM0A1); - OCR0A = val; // set pwm duty - break; - #endif - - #if defined(TCCR0A) && defined(COM0B1) - case TIMER0B: - // connect pwm to pin on timer 0, channel B - sbi(TCCR0A, COM0B1); - OCR0B = val; // set pwm duty - break; - #endif - - #if defined(TCCR1A) && defined(COM1A1) - case TIMER1A: - // connect pwm to pin on timer 1, channel A - sbi(TCCR1A, COM1A1); - OCR1A = val; // set pwm duty - break; - #endif - - #if defined(TCCR1A) && defined(COM1B1) - case TIMER1B: - // connect pwm to pin on timer 1, channel B - sbi(TCCR1A, COM1B1); - OCR1B = val; // set pwm duty - break; - #endif - - #if defined(TCCR1A) && defined(COM1C1) - case TIMER1C: - // connect pwm to pin on timer 1, channel C - sbi(TCCR1A, COM1C1); - OCR1C = val; // set pwm duty - break; - #endif - - #if defined(TCCR2) && defined(COM21) - case TIMER2: - // connect pwm to pin on timer 2 - sbi(TCCR2, COM21); - OCR2 = val; // set pwm duty - break; - #endif - - #if defined(TCCR2A) && defined(COM2A1) - case TIMER2A: - // connect pwm to pin on timer 2, channel A - sbi(TCCR2A, COM2A1); - OCR2A = val; // set pwm duty - break; - #endif - - #if defined(TCCR2A) && defined(COM2B1) - case TIMER2B: - // connect pwm to pin on timer 2, channel B - sbi(TCCR2A, COM2B1); - OCR2B = val; // set pwm duty - break; - #endif - - #if defined(TCCR3A) && defined(COM3A1) - case TIMER3A: - // connect pwm to pin on timer 3, channel A - sbi(TCCR3A, COM3A1); - OCR3A = val; // set pwm duty - break; - #endif - - #if defined(TCCR3A) && defined(COM3B1) - case TIMER3B: - // connect pwm to pin on timer 3, channel B - sbi(TCCR3A, COM3B1); - OCR3B = val; // set pwm duty - break; - #endif - - #if defined(TCCR3A) && defined(COM3C1) - case TIMER3C: - // connect pwm to pin on timer 3, channel C - sbi(TCCR3A, COM3C1); - OCR3C = val; // set pwm duty - break; - #endif - - #if defined(TCCR4A) - case TIMER4A: - //connect pwm to pin on timer 4, channel A - sbi(TCCR4A, COM4A1); - #if defined(COM4A0) // only used on 32U4 - cbi(TCCR4A, COM4A0); - #endif - OCR4A = val; // set pwm duty - break; - #endif - - #if defined(TCCR4A) && defined(COM4B1) - case TIMER4B: - // connect pwm to pin on timer 4, channel B - sbi(TCCR4A, COM4B1); - OCR4B = val; // set pwm duty - break; - #endif - - #if defined(TCCR4A) && defined(COM4C1) - case TIMER4C: - // connect pwm to pin on timer 4, channel C - sbi(TCCR4A, COM4C1); - OCR4C = val; // set pwm duty - break; - #endif - - #if defined(TCCR4C) && defined(COM4D1) - case TIMER4D: - // connect pwm to pin on timer 4, channel D - sbi(TCCR4C, COM4D1); - #if defined(COM4D0) // only used on 32U4 - cbi(TCCR4C, COM4D0); - #endif - OCR4D = val; // set pwm duty - break; - #endif - - - #if defined(TCCR5A) && defined(COM5A1) - case TIMER5A: - // connect pwm to pin on timer 5, channel A - sbi(TCCR5A, COM5A1); - OCR5A = val; // set pwm duty - break; - #endif - - #if defined(TCCR5A) && defined(COM5B1) - case TIMER5B: - // connect pwm to pin on timer 5, channel B - sbi(TCCR5A, COM5B1); - OCR5B = val; // set pwm duty - break; - #endif - - #if defined(TCCR5A) && defined(COM5C1) - case TIMER5C: - // connect pwm to pin on timer 5, channel C - sbi(TCCR5A, COM5C1); - OCR5C = val; // set pwm duty - break; - #endif - - case NOT_ON_TIMER: - default: - if (val < 128) { - digitalWrite(pin, LOW); - } else { - digitalWrite(pin, HIGH); - } - } - } -} - |