dat_fixture_wemos_stepper_test1.cpp

#include <ESP8266WiFi.h>

char ssid[] = "your ssid";
char pass[] = "your pass";

//*****************************************************
#define DIR_PIN D0
#define STEP_PIN D3
#define ENABLE_PIN D4
#define DISABLE     HIGH
#define ENABLE      LOW
#define int_period 500L // [µsec] time to next interrupt
#define m_step_count_down_time 4 // m_step_count_down_time*int_period[msec] count down timer to disable motor driver minimum time the stepper needs to perform one step keep it low to save current
//********************************************************

int     steps = 0;      // # of steps to be performed
int Periode   = 2000;   // [µsec] !!!  period time to next step
int Next_Step = Periode;// [µsec] !!!  count down timer current step
int m_step_count_down = 0;//[0,5msec]!!!  count down timer to disable motor driver
int RUN=LOW ; //if set t0 HIGH the motor will run for ever


void timer0_ISR (void)
{
  timer0_write(ESP.getCycleCount() + int_period * 80 ); //40000L); // 80MHz == int_period[msec]
  if (m_step_count_down-- <= 1) digitalWrite(ENABLE_PIN, DISABLE); // disable motor driver when step is performed

  if (steps > 0) // are there steps to be performed ?
  {
    Next_Step -= int_period ; // [µs];
    if (Next_Step <= Periode) //[µsec]period time to next step
    {
      digitalWrite(ENABLE_PIN, ENABLE); // enable motor driver 
      Next_Step += Periode;  //    Next_Step = Next_Step + Periode;
      digitalWrite( STEP_PIN, LOW);
      steps--; // it will decrement two times when performing one single step
      m_step_count_down = m_step_count_down_time ; // m_step_count_down_time*int_period[msec] count down timer to disable motor driver
      digitalWrite( STEP_PIN, HIGH);// perform one step
    }
  }
}

void stepper_init() {
  pinMode (ENABLE_PIN , OUTPUT);
  digitalWrite(ENABLE_PIN, DISABLE); // disable motor driver_2
  pinMode (STEP_PIN , OUTPUT);
  digitalWrite(STEP_PIN, LOW);
  pinMode (DIR_PIN , OUTPUT);
  noInterrupts();
  timer0_isr_init();
  timer0_attachInterrupt(timer0_ISR);
  timer0_write(ESP.getCycleCount() + 80000000L); // 80MHz == 1sec
  interrupts();
}

void stepper_drive(int dir, int steps /* ??? */) {
}

void setup()
{ 
  Serial.begin(9600);
  stepper_init();
}

void loop()
{
  if(RUN==HIGH)steps=100; // Run for ever
}


/*
BLYNK_WRITE(V1)
{
  Periode = param.asInt() ; // assigning incoming value from pin V1 to a variable
  if (Periode<int_period)   Serial.printf("Error Periode lower than int_period  ");
  Next_Step = Periode;
}

BLYNK_WRITE(V2)
{
  steps = param.asInt();// assigning incoming value from pin V2 to a variable
}


BLYNK_WRITE(V3)
{
  RUN = param.asInt(); // assigning incoming value from pin V3 to a variable
}
*/