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104 lines
3.3 KiB
C++
104 lines
3.3 KiB
C++
/*
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Arduino Starter Kit example
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Project 10 - Zoetrope
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This sketch is written to accompany Project 10 in the Arduino Starter Kit
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Parts required:
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- two 10 kilohm resistors
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- two momentary pushbuttons
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- one 10 kilohm potentiometer
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- motor
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- 9V battery
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- H-Bridge
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created 13 Sep 2012
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by Scott Fitzgerald
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Thanks to Federico Vanzati for improvements
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http://www.arduino.cc/starterKit
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This example code is part of the public domain.
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*/
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const int controlPin1 = 2; // connected to pin 7 on the H-bridge
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const int controlPin2 = 3; // connected to pin 2 on the H-bridge
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const int enablePin = 9; // connected to pin 1 on the H-bridge
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const int directionSwitchPin = 4; // connected to the switch for direction
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const int onOffSwitchStateSwitchPin = 5; // connected to the switch for turning the motor on and off
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const int potPin = A0; // connected to the potentiometer's output
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// create some variables to hold values from your inputs
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int onOffSwitchState = 0; // current state of the on/off switch
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int previousOnOffSwitchState = 0; // previous position of the on/off switch
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int directionSwitchState = 0; // current state of the direction switch
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int previousDirectionSwitchState = 0; // previous state of the direction switch
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int motorEnabled = 0; // Turns the motor on/off
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int motorSpeed = 0; // speed of the motor
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int motorDirection = 1; // current direction of the motor
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void setup() {
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// initialize the inputs and outputs
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pinMode(directionSwitchPin, INPUT);
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pinMode(onOffSwitchStateSwitchPin, INPUT);
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pinMode(controlPin1, OUTPUT);
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pinMode(controlPin2, OUTPUT);
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pinMode(enablePin, OUTPUT);
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// pull the enable pin LOW to start
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digitalWrite(enablePin, LOW);
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}
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void loop() {
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// read the value of the on/off switch
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onOffSwitchState = digitalRead(onOffSwitchStateSwitchPin);
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delay(1);
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// read the value of the direction switch
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directionSwitchState = digitalRead(directionSwitchPin);
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// read the value of the pot and divide by 4 to get a value that can be
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// used for PWM
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motorSpeed = analogRead(potPin) / 4;
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// if the on/off button changed state since the last loop()
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if (onOffSwitchState != previousOnOffSwitchState) {
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// change the value of motorEnabled if pressed
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if (onOffSwitchState == HIGH) {
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motorEnabled = !motorEnabled;
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}
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}
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// if the direction button changed state since the last loop()
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if (directionSwitchState != previousDirectionSwitchState) {
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// change the value of motorDirection if pressed
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if (directionSwitchState == HIGH) {
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motorDirection = !motorDirection;
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}
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}
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// change the direction the motor spins by talking to the control pins
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// on the H-Bridge
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if (motorDirection == 1) {
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digitalWrite(controlPin1, HIGH);
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digitalWrite(controlPin2, LOW);
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} else {
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digitalWrite(controlPin1, LOW);
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digitalWrite(controlPin2, HIGH);
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}
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// if the motor is supposed to be on
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if (motorEnabled == 1) {
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// PWM the enable pin to vary the speed
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analogWrite(enablePin, motorSpeed);
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} else { // if the motor is not supposed to be on
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//turn the motor off
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analogWrite(enablePin, 0);
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}
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// save the current on/off switch state as the previous
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previousDirectionSwitchState = directionSwitchState;
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// save the current switch state as the previous
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previousOnOffSwitchState = onOffSwitchState;
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}
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