aboutsummaryrefslogtreecommitdiff
path: root/core/wiring_analog.c
diff options
context:
space:
mode:
authorDavid A. Mellis <d.mellis@arduino.cc>2009-11-21 23:23:43 +0000
committerDavid A. Mellis <d.mellis@arduino.cc>2009-11-21 23:23:43 +0000
commit35f5f6e99f15e0cc674c814937c82ef5fbbf86c3 (patch)
treebc2c0bbb790831ab26bfa8221cf6f3554363b89b /core/wiring_analog.c
parent80d8477877dc004f293d0ab1717b8783421d84a0 (diff)
Improving third-party hardware support:
- moving back to multple cores per platform - using target instead of platform - moving per-board and per-programmer preferences out of Preferences.java and into a new Target class - adding a new "target" preference - support for platform:value values in board preferences for bootloader path and core - XXX: need to support platform:value syntax for board upload.using preferences.
Diffstat (limited to 'core/wiring_analog.c')
-rwxr-xr-xcore/wiring_analog.c179
1 files changed, 0 insertions, 179 deletions
diff --git a/core/wiring_analog.c b/core/wiring_analog.c
deleted file mode 100755
index 529ad52..0000000
--- a/core/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);
-}