Add geiger app

firmware/apps/buggy.c

@@ -16,11 +16,11 @@ static void init(void) {
 }
 
 static void run(void) {
-	uint16_t light = photons_measure();
+	uint8_t light = photons_measure();
 
 	pentatonic_all_led_set(light >> 3);
 
-	motor_set(biased_random(light) > 0x50 ? ON : OFF);
+	motor_set(biased_random(light) > 0x50);
 
 	led_set(RIGHT, biased_random(light) > 0x20);
 	led_set(LEFT, biased_random(light) > 0x20);

firmware/apps/geiger.c

@@ -0,0 +1,60 @@
+#include <pentabug/app.h>
+#include <pentabug/music.h>
+#include <pentabug/photons.h>
+#include <pentabug/hal.h>
+
+inline uint16_t biased_random(uint8_t value) {
+	return value / 4 * (rand() & 7);
+}
+
+enum modes {
+	GEIGER,
+	TWITCH,
+	MAX_MODE,
+};
+
+static void init(void) {
+	photons_init();
+}
+
+static enum modes mode = 0;
+
+static void run(void) {
+	uint8_t light = photons_measure();
+
+	if(button_clicked(RIGHT)) {
+		++mode;
+
+		if(mode == MAX_MODE) {
+			mode = 0;
+		}
+	}
+
+	if(button_clicked(LEFT)) {
+		if(mode == 0) {
+			mode = MAX_MODE;
+		}
+
+		--mode;
+	}
+
+	switch(mode) {
+		case GEIGER:
+			if(light / 16 * (rand() & 15) > 0x40) {
+				set_note(NOTE_C, 3);
+			} else {
+				stop_note();
+			}
+
+			wait_ms(20);
+			break;
+		case TWITCH:
+			set_note(500 + light, 0);
+			wait_ms(10);
+			break;
+		case MAX_MODE:
+			break;
+	}
+}
+
+REGISTER(run, init, NULL);

firmware/lib/hal.c

@@ -8,7 +8,7 @@
 #include <pentabug/timer.h>
 
 static volatile uint8_t ir_active = 0;
-static int int_skip = 0;
+static uint16_t int_skip = 0;
 static volatile int16_t wait_time = 0;
 
 static uint16_t button_count[2];