Hello,
I got this stepper motor running code and it works fine. However I am trying to write a code to enable me to pause it and turn on led on pin 13, when I press a button and then have it continue running where it left off when I release the button.
I tried by attaching an interrupt but it didn’t work. The modifications I made are in bold. Anyone know what I did wrong?
I’m using an Arduino mega 2560.
Here is the code below. Any help will be appreciated.
//////////////////////////////////////////////////////////////////
//
2011 bildr
//Released under the MIT License - Please reuse change and share
//Using the easy stepper with your arduino
//use rotate and/or rotateDeg to controll stepper motor
//speed is any number from .01 -> 1 with 1 being fastest -
//Slower Speed == Stronger movement
/////////////////////////////////////////////////////////////////
#include <avr/interrupt.h>
# define LED_PIN 13
# define SWITCH_PIN 5 // pin 18 for interrupt on Arduino mega 2560
#define DIR_PIN 2
#define STEP_PIN 3
void setup() {
pinMode(DIR_PIN, OUTPUT);
pinMode(STEP_PIN, OUTPUT);
pinMode(LED_PIN, OUTPUT);
// switch input
pinMode(18, INPUT);
// attach the interrupt on pin 18
attachInterrupt(SWITCH_PIN, light, LOW);
}
void light() {
digitalWrite(LED_PIN, HIGH);
}
void loop(){
//rotate a specific number of degrees
rotateDeg(360, 1);
delay(1000);
rotateDeg(-360, .1); //reverse
delay(1000);
//rotate a specific number of microsteps (8 microsteps per step)
//a 200 step stepper would take 1600 micro steps for one full revolution
rotate(1600, .5);
delay(1000);
rotate(-1600, .25); //reverse
delay(1000);
}
void rotate(int steps, float speed){
//rotate a specific number of microsteps (8 microsteps per step) - (negitive for reverse movement)
//speed is any number from .01 -> 1 with 1 being fastest - Slower is stronger
int dir = (steps > 0)? HIGH:LOW;
steps = abs(steps);
digitalWrite(DIR_PIN,dir);
float usDelay = (1/speed) * 70;
for(int i=0; i < steps; i++){
digitalWrite(STEP_PIN, HIGH);
delayMicroseconds(usDelay);
digitalWrite(STEP_PIN, LOW);
delayMicroseconds(usDelay);
}
}
void rotateDeg(float deg, float speed){
//rotate a specific number of degrees (negitive for reverse movement)
//speed is any number from .01 -> 1 with 1 being fastest - Slower is stronger
int dir = (deg > 0)? HIGH:LOW;
digitalWrite(DIR_PIN,dir);
int steps = abs(deg)*(1/0.225);
float usDelay = (1/speed) * 70;
for(int i=0; i < steps; i++){
digitalWrite(STEP_PIN, HIGH);
delayMicroseconds(usDelay);
digitalWrite(STEP_PIN, LOW);
delayMicroseconds(usDelay);
}
}
