Accelstepper not moving closed loop stepper

[jackson]

I am trying to control a closed loop stepper and driver with a teensy 4.0. I would like to use the accelstepper library, but thus far I can't get it to move the motor. When I run the first sketch below, the motor turns with speed controlled by the delay. When I try running the example accelstepper constant speed sketch nothing happens. I have also tried sourcing 5v and dropping the voltage before it gets back to the 3v tolerant pins, but no dice. Any ideas what could be causing the issue? Thanks.

#include <Arduino.h>

const int pulPin = 6;  // PUL
const int dirPin = 7; // DIR

void setup() {
  pinMode(pulPin,OUTPUT);
  pinMode(dirPin,OUTPUT);

  digitalWrite(dirPin,HIGH);
  delayMicroseconds(5);
}
void loop() {
  // put your main code here, to run repeatedly:
  digitalWrite(pulPin,HIGH);
  delayMicroseconds(200);
  digitalWrite(pulPin,LOW);
  delayMicroseconds(200);
}

Accelstepper example:

// ConstantSpeed.pde
#include <Arduino.h>
#include <AccelStepper.h>
AccelStepper stepper(1,6,7);
void setup()
{  
   stepper.setMaxSpeed(1000);
   stepper.setSpeed(50);        
}
void loop()
{  
   stepper.runSpeed();
}

Picture of my wiring:



Link to driver manual:
https://drive.google.com/file/d/1MvoFV1bskU-Ns0xVLWQ15e_bsfoLMbrN/view

 

[MarkT]

AccelStepper was written for slow microcontrollers and doesn't have enough delay for the
pulse generation.

Try

void setup()
{  
   stepper.setMinPulseWidth(15);
   stepper.setMaxSpeed(1000);
   stepper.setSpeed(50);        
}

The library uses a default of 5µs, expecting the overheads to stretch this to at least 10µs required by most optocouplers.
The T4's overheads are a few tens of nanoseconds so this doesn't work.

 

[jackson]

Wow... one line fixed days of headache. Next time I'll start on this forum. Maybe the accelstepper page on the pjrc site should be updated with this bit of information? I didn't see any mention of it. Thanks!!