esp32控制8个步进电机同时运动

ESP32控制8个步进电机同时运动（74HC595）

连线图+程序+仿真

https://wokwi.com/projects/333693682987303506

通过使用74HC595模块进行IO扩展，实现esp32使用3个引脚控制8个步进电机同时运动

Arduino程序

所用到的库：

• ShiftRegister74HC595

#include <Arduino.h>
#include <ShiftRegister74HC595.h>
// https://github.com/Simsso/ShiftRegister74HC595

const int dataPin = 5;   /* DS */
const int clockPin = 19; /* SHCP */
const int latchPin = 18; /* STCP */

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

// 电机正转
void forward(unsigned long STEPS_PER_REV)
{
  unsigned int delayTime = 800;

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

  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 setup()
{
}

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

74HC595串联连线

8位串行输入并行输出（SIPO）移位寄存器 使用74HC595移位寄存器扩展微控制器上的输出引脚数量。

引脚名称

Pin	Description
DS	Serial input
SHCP	Serial clock
STCP	Storage (latch) pin
OE	Output enable, active low. Connect to GND if not used.
Q0…Q7	Parallel output
Q7S	Serial output*
MR	Reset (clear), active low. Connect to VCC if not used
GND	Ground
VCC	Supply voltage

使用 Q7S 将多个 74HC595 单元链接在一起 : 将 Q7S 连接到下一个 74HC595 芯片的 DS 引脚。

注：SHCP、STCP也需连接