1
0
mirror of https://github.com/arduino/Arduino.git synced 2024-12-13 23:48:46 +01:00
Arduino/build/shared/examples/10.StarterKit/p10_Zoetrope/p10_Zoetrope.ino
2015-07-06 15:19:05 +02:00

109 lines
3.3 KiB
C++

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