broke out interrupts into isr.cpp

fw/HackSpaceCon/src/rgbled.cpp

@@ -37,15 +37,9 @@ void conf_rgb_timer()
     TCB0.CNT = 0;
 }
 
-ISR(TCB0_INT_vect)
-{
-    // reset the INTFLAGS - necessary on this series
-    uint8_t intflags = TCB0.INTFLAGS;
-    TCB0.INTFLAGS = intflags;
 
-    // we don't care why we interrupted.
-    // we'll now return to executing loop()
-}
+// globals for all rgb programs
+uint16_t prog_timeout;
 
 
 // rgb program 0: rainbow puke
@@ -56,7 +50,6 @@ ISR(TCB0_INT_vect)
 #define RAINBOW_VAL         0x40                // value (brightness); keep low enough to keep average current down
 
 uint16_t rainbow_hue = 0;
-uint16_t rainbow_timeout;
 
 uint8_t rgbp_rainbow(uint8_t init)
 {
@@ -66,10 +59,10 @@ uint8_t rgbp_rainbow(uint8_t init)
 
     // set our timer when initializing. otherwise every call is identical
     if (init) {
-        rainbow_timeout = RAINBOW_TIMEOUT;
+        prog_timeout = RAINBOW_TIMEOUT;
     }
 
-    if (--rainbow_timeout) {
+    if (--prog_timeout) {
         // copy stored hue to working hue
         hue = rainbow_hue;