1 files changed, 46 insertions, 0 deletions
diff --git a/sketch_mar5a/sketch_mar5a.ino b/sketch_mar5a/sketch_mar5a.ino
new file mode 100644
index 0000000..11de40e
--- /dev/null
+++ b/sketch_mar5a/sketch_mar5a.ino
@@ -0,0 +1,46 @@
+// This pin is used to read data from the shift register (4021).
+const uint8_t PISO_DATA_PIN = 5;
+
+// This pin should be connected to the clock pin used to advance output in the shift regitster (4021).
+const uint8_t PISO_CLOCK_PIN = 4;
+
+// This pin should be connected to the data out of the flip-flop (4013).
+const uint8_t DATA_READY_PIN = 3;
+
+// This pin is used to reset the state of the rotary dial board.
+// It should be connected to the reset pin of the flip-flop (4013) and counter (4520).
+const uint8_t RESET_PIN = 2;
+
+void setup() {
+  Serial.begin(9600);
+  pinMode(PISO_DATA_PIN, INPUT);
+  pinMode(PISO_CLOCK_PIN, OUTPUT);
+  pinMode(DATA_READY_PIN, INPUT);
+  pinMode(RESET_PIN, OUTPUT);
+}
+
+void loop() {
+  if (digitalRead(DATA_READY_PIN)) {
+    Serial.println("Data ready from rotary dial circuit!!");
+
+    digitalWrite(PISO_CLOCK_PIN, LOW);
+    uint8_t data = 0;
+    for (int i = 0; i < 8; ++i) {
+      int bit = digitalRead(PISO_DATA_PIN);
+      data = (data << 1) | bit;
+
+      digitalWrite(PISO_CLOCK_PIN, HIGH);
+      digitalWrite(PISO_CLOCK_PIN, LOW);
+    }
+
+    //uint8_t data = shiftIn(PISO_DATA_PIN, PISO_CLOCK_PIN, MSBFIRST);
+    Serial.print("Number: ");
+    Serial.print(data, DEC);
+    Serial.print(", ");
+    Serial.println(data, BIN);
+
+    digitalWrite(RESET_PIN, LOW);
+    digitalWrite(RESET_PIN, HIGH);
+    digitalWrite(RESET_PIN, LOW);
+  }
+}