106 lines
2.9 KiB
C++
106 lines
2.9 KiB
C++
/* Bike Computer V1
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Provides controls to basic functions on a bike, such as turning on and off lights,
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Measuring distance traveled, average speed, and logs to a microSD card.
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Future versions will also be able to communicate to other
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microcontrollers through the serial interface.
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Version 1 (This version) will be responsible for detecting ambiant light and ramping
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up/down the front and rear LED brightness once light levels reach a certain level.
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Other responsibilities will be blinking pairs of LEDs (front and back) on either side
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of the bike to indicate turning.
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*/
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// D4 and D5 are reserved for I2C
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// Headlight
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const int ambientIn = A0; // Analog input pin that the potentiometer is attached to
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const int headlight = 3; // Analog output pin that the LED is attached to
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const int incrBy = 5; // Amount to increase or decrease LED brightness by
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int sensorValue = 0; // value read from the pot
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int outputValue = 0; // value output to the PWM (analog out)
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// Blinkers
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const int lBnkSw = A1; // Left Blinker switch
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const int rBnkSw = A2; // Right Blinker switch
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const int lBnk = 6; // Left Blinker
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const int rBnk = 7; // Right Blinker
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const int bnkSpeed = 500; // in ms, 500 = twice a second
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int lBnkSt = LOW;
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int rBnkSt = LOW;
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int lBnkSwSt = 0;
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int rBnkSwSt = 0;
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unsigned long previousMillis = 0;
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void setup() {
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// Set out outputs
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pinMode(headlight, OUTPUT);
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pinMode(lBnk, OUTPUT);
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pinMode(rBnk, OUTPUT);
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// Set our inputs
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pinMode(ambientIn, INPUT);
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pinMode(lBnkSw, INPUT);
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pinMode(rBnkSw, INPUT);
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}
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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
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sensorValue = analogRead(ambientIn);
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if(sensorValue <= 45 && outputValue <= 250){
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outputValue = outputValue + incrBy;
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}
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if(sensorValue >= 50 && outputValue > 0){
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outputValue = outputValue - incrBy;
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}
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analogWrite(headlight, outputValue);
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}
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void blinker(){ // Controls the blinkers
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unsigned long currentMillis = millis();
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// Get info from switches
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lBnkSwSt = digitalRead(lBnkSw);
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rBnkSwSt = digitalRead(rBnkSw);
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// Automatically turn off LEDs if switch is off
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if(lBnkSwSt == LOW){ digitalWrite(lBnk, LOW); }
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if(rBnkSwSt == LOW){ digitalWrite(rBnk, LOW); }
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if(lBnkSwSt == HIGH){ // Test if left blinker switch is on
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if(currentMillis - previousMillis >= bnkSpeed){
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previousMillis = currentMillis;
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if(lBnkSt == LOW)
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lBnkSt = HIGH;
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else
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lBnkSt = LOW;
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digitalWrite(lBnk, lBnkSt); // Begin blinking
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}
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}
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if(rBnkSwSt == HIGH){ // Test if right blinker is on
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if(currentMillis - previousMillis >= bnkSpeed){
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previousMillis = currentMillis;
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if(rBnkSt == LOW)
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rBnkSt = HIGH;
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else
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rBnkSt = LOW;
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digitalWrite(rBnk, rBnkSt); // Begin blinking
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}
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}
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}
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void loop() {
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headLight();
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blinker();
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}
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