initial import

ticker.ino

@@ -0,0 +1,70 @@
+
+/*
+clock 0 is the main clock at 666 Hz
+the other clocks have different patterns that repeat
+after 7 clock pulses of clock 0
+*/
+
+/*
+We store the clock patterns as bits: 0 means no change,
+1 means raising or falling (depending on the current clock_X_state).
+A 7 pulse clock pattern consists of 14 flanks, starting from left
+(most significant bit) to the right. Last (lowest) two bits are ignored.
+*/
+
+typedef struct {
+    byte pin;
+    byte state;
+    unsigned int bits;
+} Clock_t;
+
+
+Clock_t clocks[4] = {
+    {5, HIGH, 0b1111111111111111}, // puple
+    {6, HIGH, 0b1010100010101011}, // gray/pink
+    {7, LOW,  0b1000001000000011}, // yellow
+    {8, HIGH, 0b1000101000100011}, // pink
+};
+
+byte high_pin = 9;
+
+byte data_pin = 4; // white
+byte data_state = LOW;
+
+void setup() {
+    for (int i = 0; i < 4; i++) {
+        Clock_t *clock = &clocks[i];
+        pinMode(clock->pin, OUTPUT);    
+        digitalWrite(clock->pin, clock->state);
+    }
+    pinMode(data_pin, OUTPUT);
+    pinMode(high_pin, OUTPUT);
+    pinMode(high_pin, HIGH);
+    pinMode(13, OUTPUT);
+}
+
+byte counter = 0;
+void loop() {
+
+    unsigned int mask = 1 << (15 - counter);
+
+    for (int i = 0; i < 4; i++) {
+        Clock_t *clock = &clocks[i];
+        if (clock->bits & mask > 0) {
+            clock->state = !clock->state;
+            digitalWrite(clock->pin, clock->state);
+        }
+    }
+
+    digitalWrite(high_pin, LOW);
+    // delayMicroseconds(5);
+    digitalWrite(high_pin, HIGH);
+
+    if (counter % 2 == 0) {
+        data_state = !data_state;
+        digitalWrite(data_pin, data_state);
+        digitalWrite(13, data_state);
+    }
+
+    delayMicroseconds(750);
+}