How to add one pushbutton to control stepper motor？

Projects Programming
1

When I test following code, I hope it start to run after push button is pressed, but it always ran, means
push button didn't work at all? Can somebody check the code for me?

Thanks!

#define X_DIR     3       
#define X_STP     4       
int pushbuttonpin = 7;    //Pin for momentary push button switch or sensor
int val=0;

void step(boolean dir, byte dirPin, byte stepperPin, int steps)
{
  
  digitalWrite(dirPin, dir);
  delay(50);
  for (int i = 0; i < steps; i++) {
    digitalWrite(stepperPin, HIGH);
    delayMicroseconds(800);  
    digitalWrite(stepperPin, LOW);
    delayMicroseconds(800);  
  }
}
void setup(){

  Serial.begin(9600);
  pinMode(pushbuttonpin, INPUT);   //Declare push button switch pin as input
 
  pinMode(X_DIR, OUTPUT); pinMode(X_STP, OUTPUT);
    
}
void loop(){
  val=digitalRead(pushbuttonpin);
  if(val==HIGH)
  {
  step(true, X_DIR, X_STP, 800); 
    delay(1000); 
  step(false, X_DIR, X_STP, 400); 
 
}
}
3

yes, I have external resistor, How to change code? Thanks!

5

Have you made sure that the button is not in floating state?

You have many delay() in your code. To allow the program to respond to the button pushed any time you must get rid of delay() and use millis() for timing

6

same as following example,

8

Problem is solved! Connect GND of Arduino board to push button GND.

Thanks !