fw/HackSpaceCon/src/isr.cpp

@@ -8,29 +8,33 @@ extern uint8_t run_rgbprog;
 // TCB0 general interrupt
 ISR(TCB0_INT_vect)
 {
+    // reset the INTFLAGS - necessary on this series
     uint8_t intflags = TCB0.INTFLAGS;
+    TCB0.INTFLAGS = intflags;
 
     // in this program, this interrupt is only used for timing.
     // we'll now return to executing loop()
-
-    // reset the INTFLAGS - necessary on this series
-    TCB0.INTFLAGS = intflags;
 }
 
 // button interrupt
 ISR(PORTA_PORT_vect)
 {
+    // reset the INTFLAGS - necessary on this series
     uint8_t intflags = PORTA.INTFLAGS;
-
-    // shitty debounce; this is bad practice
-    delay(5);
+    PORTA.INTFLAGS = intflags;
 
 	// was our pin changed?
     if (intflags & PIN3_bm) {
-        // start or re-start running a program
-        run_rgbprog = 1;        // run a new program
+		// is the pin low?
+		if (!digitalRead(PIN_PA3)) {
+			// start running a program if one isn't running already
+        	if (!run_rgbprog) {
+                run_rgbprog = 1;        // run a program
+            }
+		} else if (run_rgbprog == 2) {
+			// if we're running a program when the button is released (likely),
+			// then skip this interrupt
+			run_rgbprog++;
+		}
     }
-
-    // reset the INTFLAGS - necessary on this series
-    PORTA.INTFLAGS = intflags;
 }

fw/HackSpaceCon/src/main.cpp

@@ -48,14 +48,12 @@
 #include "rgbled.h"
 
 
-#define PIN_LED_PWRENA		PIN_PA6
-
-
 
 enum {
-	RGB_IDLE,
-	RGB_INIT,
-	RGB_RUNNING
+	RGB_PROG_IDLE,
+	RGB_PROG_INIT,
+	RGB_PROG_RUNNING,
+	RGB_PROG_BTN_RELEASE
 };
 
 enum {
@@ -63,7 +61,7 @@ enum {
 	PROG_INIT = 1
 };
 
-uint8_t run_rgbprog = RGB_IDLE;
+uint8_t run_rgbprog = RGB_PROG_IDLE;
 uint8_t rgbprog_idx = 0;
 
 
@@ -83,22 +81,23 @@ void sleep_cpu()
 
 // mcu init
 void setup() {
-	// configure PA2 as falling edge interrupt for button
-	// note: only PA2 and PA6 support async wakeup.
-	//       since we're using PA2, we're good to wakeup from a
-	//       falling edge (button pushed) event only.
-	PORTA.DIRCLR = PIN2_bm;
-    PORTA.PIN2CTRL = PORT_PULLUPEN_bm | PORT_ISC_FALLING_gc;
+	// configure PA3 as both edge interrupt input for button
+	// note: only PA2 and PA6 support async wakeup and thus we can't check for
+    //       falling edge on PA3. we're not using PA6 for the button as a
+	//		 future program may use SPI MISO to drive the LEDs.
+	//		 because of this, we need to wake up on both edges.
+	PORTA.DIRCLR = PIN3_bm;
+    PORTA.PIN3CTRL = PORT_PULLUPEN_bm | PORT_ISC_BOTHEDGES_gc;
 
 	// configure other hardware pins as appropriate
-	pinMode(PIN_PA3, INPUT_PULLUP);	// unused, spare pad on board
-	pinMode(PIN_PA7, INPUT_PULLUP);	// unused, voltage passthru
+	pinMode(PIN_PA1, INPUT_PULLUP);	// unused
+	pinMode(PIN_PA7, INPUT_PULLUP);	// unused
 
 	digitalWrite(PIN_PA6, LOW);
 	pinMode(PIN_PA6, OUTPUT);		// LED boost regulator enable
 
-	digitalWrite(PIN_PA1, LOW);
-	pinMode(PIN_PA1, OUTPUT);		// LED data
+	digitalWrite(PIN_PA2, LOW);
+	pinMode(PIN_PA2, OUTPUT);		// LED data
 
 	// set up the RGB ~61Hz periodic timer
 	conf_rgb_timer();
@@ -110,12 +109,12 @@ void setup() {
 // mcu program loop
 void loop() {
 	switch (run_rgbprog) {
-		case RGB_INIT: {						// just started running a program
-			digitalWrite(PIN_LED_PWRENA, HIGH);	// enable LED power supply,
-			delay(20);							// wait a moment for LEDs to stabilize,
+		case RGB_PROG_INIT: {					// just started running a program
+			digitalWrite(PIN_PA6, HIGH);		// enable LED power supply,
+			delay(10);							// wait a moment for LEDs to stabilize,
 
 			rgbprog_idx++;						// select the next program in sequence,
-			if (rgbprog_idx >= PROG_COUNT) {
+			if (rgbprog_idx > PROG_COUNT) {
 				rgbprog_idx = 0;
 			}
 
@@ -129,11 +128,11 @@ void loop() {
 			break;
 		}
 
-		case RGB_RUNNING: {						// continuing to run a program
+		case RGB_PROG_RUNNING: {				// continuing to run a program
 			rgb.show();							// send updates to the led
-												// then process the next program frame
-			if (!rgb_program[rgbprog_idx](PROG_RUN)) {	
-				run_rgbprog = RGB_IDLE;			// until the program says it's done
+
+			if (!rgb_program[0](PROG_RUN)) {	// then process the next program frame
+				run_rgbprog = RGB_PROG_IDLE;	// until the program says it's done
 				break;
 			}
 
@@ -142,10 +141,18 @@ void loop() {
 			break;
 		}
 
+		case RGB_PROG_BTN_RELEASE: {			// button released wakes MCU, but we're still running a program
+			run_rgbprog = RGB_PROG_RUNNING;		// so skip processing this cycle and go back to stage 2
+
+			idle_cpu();							// we can idle the CPU after doing nothing
+			
+			break;
+		}
+
 		default: {								// no longer running a program
 			disable_rgb_timer();				// disable RGB program timer,
-			digitalWrite(PIN_LED_PWRENA, LOW);	// disable LED power supply,
-			run_rgbprog = RGB_IDLE;				// and clear run_rgbprog.
+			digitalWrite(PIN_PA6, LOW);			// disable LED power supply,
+			run_rgbprog = RGB_PROG_IDLE;		// and clear run_rgbprog.
 
 			sleep_cpu();						// finally, go to sleep in standby mode
 

fw/HackSpaceCon/src/rgbled.cpp

@@ -110,14 +110,14 @@ uint8_t rgbp_circlefade(uint8_t init)
     // set our timer when initializing. otherwise every call is identical
     if (init) {
         prog_timeout = CF_TIMEOUT;
-        circlefade_idx = 4;         // top LED
+        circlefade_idx = 0;
     }
 
     if (--prog_timeout) {
         t = (uint8_t)(CF_TIMEOUT - prog_timeout);   // get time elapsed
         t &= 0x3;                                   // light a new LED every 4th loop
 
-        // fade each LED down every frame
+        // fade each LED down every cycle
         for (i = 0; i < (sizeof(rgbled) / sizeof(rgbled[0])); i++) {
             if (rgbled[i] >= CF_FADERATE) {
                 rgbled[i] -= CF_FADERATE;
@@ -131,7 +131,7 @@ uint8_t rgbp_circlefade(uint8_t init)
             if (!t) {                               // then on a loop boundary, light the next LED
                 rgb.setPixelColor(circlefade_idx, CF_BRIGHTNESS, CF_BRIGHTNESS, CF_BRIGHTNESS);
 
-                if (++circlefade_idx >= RGB_COUNT) { // then work on the next LED in sequence
+                if (++circlefade_idx > RGB_COUNT) { // then work on the next LED in sequence
                     circlefade_idx = 0;
                 }
             }