Adding support for the Arduino Mega (ATmega1280) to the core and bootloader.

1 files changed, 129 insertions, 11 deletions

diff --git a/cores/arduino/WInterrupts.c b/cores/arduino/WInterrupts.c
index 8b9003f..69a78b0 100755
--- a/cores/arduino/WInterrupts.c
+++ b/cores/arduino/WInterrupts.c
@@ -44,29 +44,101 @@ void attachInterrupt(uint8_t interruptNum, void (*userFunc)(void), int mode) {
   if(interruptNum < EXTERNAL_NUM_INTERRUPTS) {
     intFunc[interruptNum] = userFunc;
     
-    if (interruptNum == 0) {
-      // Configure the interrupt mode (trigger on low input, any change, rising
-      // edge, or falling edge).  The mode constants were chosen to correspond
-      // to the configuration bits in the hardware register, so we simply shift
-      // the mode into place.
-      EICRA = (EICRA & ~((1 << ISC00) | (1 << ISC01))) | (mode << ISC00);
+    // Configure the interrupt mode (trigger on low input, any change, rising
+    // edge, or falling edge).  The mode constants were chosen to correspond
+    // to the configuration bits in the hardware register, so we simply shift
+    // the mode into place.
+      
+    // Enable the interrupt.
       
-      // Enable the interrupt.
+    switch (interruptNum) {
+#if defined(__AVR_ATmega1280__)
+    case 2:
+      EICRA = (EICRA & ~((1 << ISC00) | (1 << ISC01))) | (mode << ISC00);
+      EIMSK |= (1 << INT0);
+      break;
+    case 3:
+      EICRA = (EICRA & ~((1 << ISC10) | (1 << ISC11))) | (mode << ISC10);
+      EIMSK |= (1 << INT1);
+      break;
+    case 4:
+      EICRA = (EICRA & ~((1 << ISC20) | (1 << ISC21))) | (mode << ISC20);
+      EIMSK |= (1 << INT2);
+      break;
+    case 5:
+      EICRA = (EICRA & ~((1 << ISC30) | (1 << ISC31))) | (mode << ISC30);
+      EIMSK |= (1 << INT3);
+      break;
+    case 0:
+      EICRB = (EICRB & ~((1 << ISC40) | (1 << ISC41))) | (mode << ISC40);
+      EIMSK |= (1 << INT4);
+      break;
+    case 1:
+      EICRB = (EICRB & ~((1 << ISC50) | (1 << ISC51))) | (mode << ISC50);
+      EIMSK |= (1 << INT5);
+      break;
+    case 6:
+      EICRB = (EICRB & ~((1 << ISC60) | (1 << ISC61))) | (mode << ISC60);
+      EIMSK |= (1 << INT6);
+      break;
+    case 7:
+      EICRB = (EICRB & ~((1 << ISC70) | (1 << ISC71))) | (mode << ISC70);
+      EIMSK |= (1 << INT7);
+      break;
+#else
+    case 0:
+      EICRA = (EICRA & ~((1 << ISC00) | (1 << ISC01))) | (mode << ISC00);
       EIMSK |= (1 << INT0);
-    } else {
+      break;
+    case 1:
       EICRA = (EICRA & ~((1 << ISC10) | (1 << ISC11))) | (mode << ISC10);
       EIMSK |= (1 << INT1);
+      break;
+#endif
     }
   }
 }
 
 void detachInterrupt(uint8_t interruptNum) {
   if(interruptNum < EXTERNAL_NUM_INTERRUPTS) {
-    if (interruptNum == 0)
-      // Disable the interrupt.
+    // Disable the interrupt.  (We can't assume that interruptNum is equal
+    // to the number of the EIMSK bit to clear, as this isn't true on the 
+    // ATmega8.  There, INT0 is 6 and INT1 is 7.)
+    switch (interruptNum) {
+#if defined(__AVR_ATmega1280__)
+    case 2:
+      EIMSK &= ~(1 << INT0);
+      break;
+    case 3:
+      EIMSK &= ~(1 << INT1);
+      break;
+    case 4:
+      EIMSK &= ~(1 << INT2);
+      break;
+    case 5:
+      EIMSK &= ~(1 << INT3);
+      break;
+    case 0:
+      EIMSK &= ~(1 << INT4);
+      break;
+    case 1:
+      EIMSK &= ~(1 << INT5);
+      break;
+    case 6:
+      EIMSK &= ~(1 << INT6);
+      break;
+    case 7:
+      EIMSK &= ~(1 << INT7);
+      break;
+#else
+    case 0:
       EIMSK &= ~(1 << INT0);
-    else
+      break;
+    case 1:
       EIMSK &= ~(1 << INT1);
+      break;
+#endif
+    }
       
     intFunc[interruptNum] = 0;
   }
@@ -78,6 +150,50 @@ void attachInterruptTwi(void (*userFunc)(void) ) {
 }
 */
 
+#if defined(__AVR_ATmega1280__)
+
+SIGNAL(INT0_vect) {
+  if(intFunc[EXTERNAL_INT_2])
+    intFunc[EXTERNAL_INT_2]();
+}
+
+SIGNAL(INT1_vect) {
+  if(intFunc[EXTERNAL_INT_3])
+    intFunc[EXTERNAL_INT_3]();
+}
+
+SIGNAL(INT2_vect) {
+  if(intFunc[EXTERNAL_INT_4])
+    intFunc[EXTERNAL_INT_4]();
+}
+
+SIGNAL(INT3_vect) {
+  if(intFunc[EXTERNAL_INT_5])
+    intFunc[EXTERNAL_INT_5]();
+}
+
+SIGNAL(INT4_vect) {
+  if(intFunc[EXTERNAL_INT_0])
+    intFunc[EXTERNAL_INT_0]();
+}
+
+SIGNAL(INT5_vect) {
+  if(intFunc[EXTERNAL_INT_1])
+    intFunc[EXTERNAL_INT_1]();
+}
+
+SIGNAL(INT6_vect) {
+  if(intFunc[EXTERNAL_INT_6])
+    intFunc[EXTERNAL_INT_6]();
+}
+
+SIGNAL(INT7_vect) {
+  if(intFunc[EXTERNAL_INT_7])
+    intFunc[EXTERNAL_INT_7]();
+}
+
+#else
+
 SIGNAL(INT0_vect) {
   if(intFunc[EXTERNAL_INT_0])
     intFunc[EXTERNAL_INT_0]();
@@ -88,6 +204,8 @@ SIGNAL(INT1_vect) {
     intFunc[EXTERNAL_INT_1]();
 }
 
+#endif
+
 /*
 SIGNAL(SIG_2WIRE_SERIAL) {
   if(twiIntFunc)