0.1.2 - Silence the shift register on boot.

README.md

@@ -19,5 +19,6 @@ Schematics and pictures up later.
 28-Dec-2019: Initial Version. Just reads five switches and triggers an output.
 29-Dec-2019: Version 0.1 - Added a display. Cleaned up code. Made a repository.
 29-Dec-2019: Version 0.1.1 - Added preliminary IR remote support
+30-Dec-2019: Version 0.1.2 - Controls ShiftReset and OutputEnable on 595 to prevent random start-up state.
 ````
 

pma770.ino

@@ -12,7 +12,9 @@
 int latchPin = 11;
 int clockPin = 9;
 int dataPin = 12;
+int srReset = 6;
 int IRin = 7;
+int srEnable = 5;
 int matrix = A0;
 
 byte out = 0;
@@ -24,7 +26,7 @@ LiquidCrystal_I2C lcd(0x27,16,2);
 
 void updateShiftRegister()
 {
-   digitalWrite(latchPin,LOW);
+   digitalWrite(latchPin, LOW);
    shiftOut(dataPin, clockPin, LSBFIRST, out);
    digitalWrite(latchPin, HIGH);
 }
@@ -97,6 +99,9 @@ void setup()
   pinMode(latchPin, OUTPUT);
   pinMode(dataPin, OUTPUT);  
   pinMode(clockPin, OUTPUT);
+  pinMode(srReset, OUTPUT);
+  pinMode(srEnable, OUTPUT);
+  digitalWrite(srReset,HIGH);
   remote.enableIRIn();
   bitSet(out,5);
   lcd.init();
@@ -107,7 +112,7 @@ void setup()
   lcd.setCursor(0, 1);
   lcd.print("Input: AUX");
   updateShiftRegister();
-
+  digitalWrite(srEnable,LOW);
 }
 
 void loop() {