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Diffstat (limited to 'cores/arduino/wiring_analog.c')
-rwxr-xr-xcores/arduino/wiring_analog.c85
1 files changed, 67 insertions, 18 deletions
diff --git a/cores/arduino/wiring_analog.c b/cores/arduino/wiring_analog.c
index f3767d2..529ad52 100755
--- a/cores/arduino/wiring_analog.c
+++ b/cores/arduino/wiring_analog.c
@@ -37,12 +37,18 @@ void analogReference(uint8_t mode)
int analogRead(uint8_t pin)
{
- uint8_t low, high, ch = analogInPinToBit(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 & 0x0f);
+ 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);
@@ -95,23 +101,23 @@ void analogWrite(uint8_t pin, int val)
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;
- }
+ 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;
- }
+ 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);
@@ -123,6 +129,49 @@ void analogWrite(uint8_t pin, int val)
// 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