added code for arduino uno

dog-feeder.ino

@@ -0,0 +1,128 @@
+#include <Servo.h>
+#include "LowPower.h"
+
+// Dusplay definitions
+byte sevenSegDigits[9] = {  B00001001   ,  // = 1
+                            B10110011   ,  // = 2
+                            B10011011   ,  // = 3
+                            B11001001   ,  // = 4
+                            B11011010   ,  // = 5
+                            B11111000   ,  // = 6
+                            B00001011   ,  // = 7
+                            B11111011   ,  // = 8
+                            B11001011      // = 9
+                           };
+byte sevenSegDP = B00000100;  // = DP
+
+
+// Pin definition
+// -buttons
+const int buttonTimeCyclePin = 3;
+const int buttonConfirmPin = 2;
+// -display
+const int latchPin = 11;
+const int clockPin = 9;
+const int dataPin = 12;
+// -servo
+Servo doorServo;
+const int servoPin = 5;
+
+const int MIN_TIME = 1800;
+const int MIN_TIME_TEST = 8; // for testing
+
+void setup() {
+  Serial.begin(9600);   
+
+  // set all pin to the correct mode
+  // -buttons
+  pinMode(buttonTimeCyclePin, INPUT_PULLUP); //define pinMode and use Pull-up resistor
+  pinMode(buttonConfirmPin, INPUT_PULLUP);
+  // -display
+  pinMode(latchPin, OUTPUT);
+  pinMode(clockPin, OUTPUT);
+  pinMode(dataPin, OUTPUT);
+  // -servo
+  doorServo.attach(servoPin);
+  doorServo.write(82);
+  delay(2000);
+}
+
+void displayNumber(int cycleMultiply) {
+  bool bDP = ((cycleMultiply % 2) == 0);
+  int digitIndex = (cycleMultiply - 1) / 2;
+
+  Serial.println(digitIndex);
+
+  digitalWrite(latchPin, LOW);
+
+  shiftOut(dataPin, clockPin, MSBFIRST, sevenSegDigits[digitIndex]+(sevenSegDP*bDP)); 
+
+  digitalWrite(latchPin, HIGH);
+}
+
+void displayBlank(){
+    digitalWrite(latchPin, LOW);
+    shiftOut(dataPin, clockPin, MSBFIRST, B00000000);  
+    digitalWrite(latchPin, HIGH);
+}
+
+void displayBlink(int cycleMultiply) {
+  for (int i = 1; i <= 4; i++) {
+    displayNumber(cycleMultiply);
+    delay(300);
+    displayBlank();
+    delay(100);
+  }
+}
+
+int getSleepDuration() {
+  int cycleMultiply = 1;
+  displayNumber(cycleMultiply);
+
+  while(true) {
+    if (digitalRead(buttonTimeCyclePin) == LOW) {
+      cycleMultiply = cycleMultiply % 18;
+      cycleMultiply++;
+      Serial.print("Increased timer by 1: ");
+      Serial.println(cycleMultiply);
+      displayNumber(cycleMultiply);
+    }
+    if (digitalRead(buttonConfirmPin) == LOW) {
+      Serial.print("Confirmed timer: ");
+      Serial.println(cycleMultiply);
+      displayBlink(cycleMultiply);
+      return MIN_TIME * cycleMultiply;
+    }
+    delay(200);
+  }
+}
+
+void deepSleep(int sleepDuration) {
+  int sleepCycles = sleepDuration / 8;
+  for (int i = 1; i <= sleepCycles; i++) {
+    LowPower.powerDown(SLEEP_8S, ADC_OFF, BOD_OFF);
+    Serial.print("Finished cycle: ");
+    Serial.println(i);
+    Serial.flush();
+  }
+
+  Serial.println("Done sleeping");
+}
+
+void openDoor() {
+  doorServo.write(10);
+  delay(1000);
+}
+
+void loop() {
+
+  int sleepDuration = getSleepDuration();
+  
+  Serial.print("Got sleep duration: ");
+  Serial.println(sleepDuration);
+  Serial.println("Entering sleep mode.");
+  Serial.flush();
+
+  deepSleep(sleepDuration);
+  openDoor();
+}