#include <Arduino.h>
#include <ShiftRegister74HC595.h>

const int dataPin = 20;   /* DS */
const int latchPin = 21; /* STCP */
const int clockPin = 26; /* SHCP */

ShiftRegister74HC595<2> sr(dataPin, clockPin, latchPin);

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
}
unsigned int delayTime = 2000;


// 电机正转
void forward(unsigned long STEPS_PER_REV)
{

  // 设置电机顺时针旋转
  // digitalWrite(dirPin, LOW);
  sr.set(6, LOW);
  sr.set(4, HIGH);
  sr.set(2, LOW);
  sr.set(0, HIGH);

  // sr.set(14, LOW);
  // sr.set(12, LOW);
  // sr.set(10, LOW);
  // sr.set(8, LOW);

  // 电机慢速旋转
  for (int x = 0; x < STEPS_PER_REV; x++)
  {
    // digitalWrite(stepPin, HIGH);
    sr.set(7, HIGH);
    sr.set(5, HIGH);
    sr.set(3, HIGH);
    sr.set(1, HIGH);

    // sr.set(15, HIGH);
    // sr.set(13, HIGH);
    // sr.set(11, HIGH);
    // sr.set(9, HIGH);
    delayMicroseconds(delayTime);
    // digitalWrite(stepPin, LOW);
    sr.set(7, LOW);
    sr.set(5, LOW);
    sr.set(3, LOW);
    sr.set(1, LOW);

    // sr.set(15, LOW);
    // sr.set(13, LOW);
    // sr.set(11, LOW);
    // sr.set(9, LOW);
    delayMicroseconds(delayTime);
  }
}


void loop() {
  forward(200);
  delay(1000);
}