From a42326aba2fd9696a4b2e1239a5a222014056ff5 Mon Sep 17 00:00:00 2001
From: "David A. Mellis" <d.mellis@arduino.cc>
Date: Wed, 25 Mar 2009 10:50:00 +0000
Subject: Adding support for the Arduino Mega (ATmega1280) to the core and
 bootloader.

---
 cores/arduino/wiring_analog.c | 85 ++++++++++++++++++++++++++++++++++---------
 1 file changed, 67 insertions(+), 18 deletions(-)

(limited to 'cores/arduino/wiring_analog.c')

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);
@@ -122,6 +128,49 @@ void analogWrite(uint8_t pin, int val)
 		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);
-- 
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