mirror of
https://github.com/arduino/Arduino.git
synced 2024-11-29 10:24:12 +01:00
109 lines
3.3 KiB
C++
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;
|
|
}
|
|
|
|
|
|
|
|
|