Rev B changes

firmware/t1616-starter/src/main.cpp

@@ -3,6 +3,7 @@
 
 #define PIN_LED PIN_PB4 // 5
 #define PIN_RGB PIN_PA7
+#define PIN_BTN PIN_PA0
 
 uint8_t seq = 0;
 
@@ -11,6 +12,7 @@ Adafruit_NeoPixel pixels(1, PIN_RGB, NEO_GRB + NEO_KHZ800);
 void setup() {
 
   pinMode(PIN_LED, OUTPUT);
+  pinMode(PIN_BTN, INPUT);
 
   delay(1000);
   Serial.begin(115200);
@@ -19,11 +21,19 @@ void setup() {
   pixels.begin();
 }
 
+uint8_t btn_state = HIGH;
+
 void loop() {
   seq++;
 
   Serial.print('.');
 
+  if (btn_state != digitalRead(PIN_BTN)) {
+    btn_state = !btn_state;
+    Serial.print("Button state is ");
+    Serial.println(btn_state);
+  }
+
   digitalWrite(PIN_LED, seq % 2);
 
   pixels.clear();
@@ -31,5 +41,5 @@ void loop() {
     pixels.setPixelColor(0, pixels.Color((0xff - seq) % 0xff, seq % 0xff, seq % 0x7f + (0xff - seq) % 0x7f));
   pixels.show();
 
-  delay(250);
+  delay(500);
 }