Add LCD panel to show stats

Bike_Computer.ino

@@ -1,4 +1,7 @@
-/* Bike Computer V1
+/* Bike Computer V1.1
+
+  Using the serial functions signifigantly increases compiled size, use this if you have a problem in execution or are testing.
+  Use the version without diagnostics in production (once you work out the bugs of course)
 
   Provides controls to basic functions on a bike, such as turning on and off lights,
   Measuring distance traveled, average speed, and logs to a microSD card.
@@ -13,11 +16,16 @@
 
 */
 
+#include <SoftwareSerial.h>
+
+SoftwareSerial lcd(2, 8);  // This is required, to start an instance of an LCD
+const int dispSw = A3;
+
 // D4 and D5 are reserved for I2C
 
 // Headlight
 const int ambientIn = A0; // Analog input pin that the potentiometer is attached to
-const int headlight = 3; // Analog output pin that the LED is attached to
+const int headlight = 3; // Digital output pin that the LED is attached to
 const int incrBy = 5; // Amount to increase or decrease LED brightness by
 int sensorValue = 0; // value read from the pot
 int outputValue = 0; // value output to the PWM (analog out)
@@ -34,8 +42,11 @@ int lBnkSwSt = 0;
 int rBnkSwSt = 0;
 unsigned long previousMillis = 0;
 
-
 void setup() {
+  lcd.begin(9600);  // Start the LCD at 9600 baud
+  clearDisplay();  // Clear the display
+  setBacklight(20);
+
   // Set out outputs
   pinMode(headlight, OUTPUT);
   pinMode(lBnk, OUTPUT);
@@ -45,6 +56,12 @@ void setup() {
   pinMode(ambientIn, INPUT);
   pinMode(lBnkSw, INPUT);
   pinMode(rBnkSw, INPUT);
+  pinMode(dispSw, INPUT);
+
+  setLCDCursor(0);
+  lcd.print("c0defox.es BCPU");
+  setLCDCursor(18);
+  lcd.print("Bike Computer");
 }
 
 void headLight(){ // Main function for determining whether or not to ramp up or ramp down the headlight and taillight. Uses ambient light sensor for that
@@ -58,6 +75,13 @@ void headLight(){ // Main function for determining whether or not to ramp up or
     outputValue = outputValue - incrBy;
   }
   analogWrite(headlight, outputValue);
+  if(outputValue >= 20){ // Ramp up/down lcd brightness with headlight - anything lower than 20 is too hard to read
+    setBacklight(outputValue);
+
+    setLCDCursor(16);
+    lcd.print("*"); // Headlight indicator on lcd
+    lcd.print(outputValue); // Brightness level of headlight
+  }
 }
 
 void blinker(){ // Controls the blinkers
@@ -75,31 +99,68 @@ void blinker(){ // Controls the blinkers
      if(currentMillis - previousMillis >= bnkSpeed){
       previousMillis = currentMillis;
 
-      if(lBnkSt == LOW) 
+      if(lBnkSt == LOW){
         lBnkSt = HIGH;
-      else
+
+        setLCDCursor(0);
+        lcd.print("<");
+      }else{
         lBnkSt = LOW;
 
+        setLCDCursor(0);
+        lcd.print(" ");
+      }
+
       digitalWrite(lBnk, lBnkSt); // Begin blinking
     }
   }
 
   if(rBnkSwSt == HIGH){ // Test if right blinker is on
+    echo("rBlinkSw", "ON");
     if(currentMillis - previousMillis >= bnkSpeed){
       previousMillis = currentMillis;
 
-      if(rBnkSt == LOW)
+      if(rBnkSt == LOW){
         rBnkSt = HIGH;
-      else
+
+        setLCDCursor(15);
+        lcd.print(">");
+      }else{
         rBnkSt = LOW;
 
+        setLCDCursor(15);
+        lcd.print(" ");
+      }
+
       digitalWrite(rBnk, rBnkSt); // Begin blinking
     }
   }
 }
 
+void setBacklight(byte brightness){
+  lcd.write(0x80);  // send the backlight command
+  lcd.write(brightness);  // send the brightness value
+}
+
+void clearDisplay(){
+  lcd.write(0xFE);  // send the special command
+  lcd.write(0x01);  // send the clear screen command
+}
+
+void setLCDCursor(byte cursor_position){
+  lcd.write(0xFE);  // send the special command
+  lcd.write(0x80);  // send the set cursor command
+  lcd.write(cursor_position);  // send the cursor position
+}
+
+void loop(){
+
+  delay(500);
+  clearDisplay();
+
+  setLCDCursor(4);
+  lcd.print("MPH: 7.5");
 
-void loop() { 
   headLight();
   blinker();
 }