Add source switcher Arduino code

Author: rmc47

C105SourceSwitcher/C105SourceSwitcher.ino

@@ -0,0 +1,99 @@
+const int  iButtonPin1 = 6;
+const int  iButtonPin2 = 7;
+const int  iButtonPin3 = 8;
+const int iRelayPin1 = 9;
+const int iRelayPin2 = 10;
+const int iIndicator1 = 2;
+const int iIndicator2 = 3;
+const int iIndicator3 = 4;
+
+int iPreviousButton = -1;
+int iLatestButton = 1;
+int iButtonState1 = 1;
+int iButtonState2 = 1;
+int iButtonState3 = 1;
+int iState = -1;
+
+int iDebounceDelay = 100;
+
+void setup() {
+  // initialize the button pins as inputs
+  pinMode(iButtonPin1, INPUT_PULLUP);
+  pinMode(iButtonPin2, INPUT_PULLUP);
+  pinMode(iButtonPin3, INPUT_PULLUP);
+  // initialize the relays as outputs
+  pinMode(iRelayPin1, OUTPUT);
+  pinMode(iRelayPin2, OUTPUT);
+  // initialise the indicator pins as outputs (to the Pi)
+  pinMode(iIndicator1, OUTPUT);
+  pinMode(iIndicator2, OUTPUT);
+  pinMode(iIndicator3, OUTPUT);
+}
+
+
+void loop() {
+  iState = digitalRead(iButtonPin1);
+  if (iState != iButtonState1) {
+    delay(iDebounceDelay);
+    iState = digitalRead(iButtonPin1);
+    if (iState != iButtonState1) {
+      iLatestButton = 1;
+      iButtonState1 = iState;
+    }
+  }
+  iState = digitalRead(iButtonPin2);
+  if (iState != iButtonState2) {
+    delay(iDebounceDelay);
+    iState = digitalRead(iButtonPin2);
+    if (iState != iButtonState2) {
+      iLatestButton = 2;
+      iButtonState2 = iState;
+    }
+  }
+  iState = digitalRead(iButtonPin3);
+  if (iState != iButtonState3) {
+    delay(iDebounceDelay);
+    iState = digitalRead(iButtonPin3);
+    if (iState != iButtonState3) {
+      iLatestButton = 3;
+      iButtonState3 = iState;
+    }
+  }
+  if (iLatestButton != iPreviousButton) {
+    iPreviousButton = iLatestButton;
+    switch(iLatestButton) {
+      case 1:
+        digitalWrite(iRelayPin1, LOW);
+        digitalWrite(iRelayPin2, LOW);
+        digitalWrite(iIndicator1, HIGH);
+        digitalWrite(iIndicator2, LOW);
+        digitalWrite(iIndicator3, LOW);
+        break;
+      case 2:
+        digitalWrite(iRelayPin1, HIGH);
+        digitalWrite(iRelayPin2, LOW);
+        digitalWrite(iIndicator1, LOW);
+        digitalWrite(iIndicator2, HIGH);
+        digitalWrite(iIndicator3, LOW);
+        break;
+      case 3:
+        digitalWrite(iRelayPin1, LOW);
+        digitalWrite(iRelayPin2, HIGH);
+        digitalWrite(iIndicator1, LOW);
+        digitalWrite(iIndicator2, LOW);
+        digitalWrite(iIndicator3, HIGH);
+        break;
+      default:
+        break;
+    }
+  }
+}
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