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我有一个步进电机 5V 4-Phase 5-Wire 和一个驱动板。

不幸的是，我没有原理图，也无法在互联网上的任何地方找到驱动板的原理图。无论如何，我按照应有的方式连接了所有东西并输入了代码（见下文），它工作正常，但它以大约 20 RPM 的速度旋转，这非常慢。

我不能再减少时间delayMicroseconds()了，因为如果我这样做了，电机就会停止旋转，并开始大声振动。请帮忙，我卡住了：

（8口接驱动器上的IN1，9口接IN2，10口接IN3，11口接IN4）

int Pin0 = 8;
int Pin1 = 9;
int Pin2 = 10;
int Pin3 = 11;
int _step = 0;
boolean dir = true;// gre
void setup()
{
  pinMode(Pin0, OUTPUT);
  pinMode(Pin1, OUTPUT);
  pinMode(Pin2, OUTPUT);
  pinMode(Pin3, OUTPUT);
}
void loop()
{
  switch(_step){  
  case 0:
  digitalWrite(Pin0, LOW);
  digitalWrite(Pin1, LOW);
  digitalWrite(Pin2, LOW);
  digitalWrite(Pin3, HIGH);
  break;
  case 1:
  digitalWrite(Pin0, LOW);
  digitalWrite(Pin1, LOW);
  digitalWrite(Pin2, HIGH);
  digitalWrite(Pin3, HIGH);
  break;
  case 2:
  digitalWrite(Pin0, LOW);
  digitalWrite(Pin1, LOW);
  digitalWrite(Pin2, HIGH);
  digitalWrite(Pin3, LOW);
  break;
  case 3:
  digitalWrite(Pin0, LOW);
  digitalWrite(Pin1, HIGH);
  digitalWrite(Pin2, HIGH);
  digitalWrite(Pin3, LOW);
  break;
  case 4:
  digitalWrite(Pin0, LOW);
  digitalWrite(Pin1, HIGH);
  digitalWrite(Pin2, LOW);
  digitalWrite(Pin3, LOW);
  break;
  case 5:
  digitalWrite(Pin0, HIGH);
  digitalWrite(Pin1, HIGH);
  digitalWrite(Pin2, LOW);
  digitalWrite(Pin3, LOW);
  break;
  case 6:
  digitalWrite(Pin0, HIGH);
  digitalWrite(Pin1, LOW);
  digitalWrite(Pin2, LOW);
  digitalWrite(Pin3, LOW);
  break;
  case 7:
  digitalWrite(Pin0, HIGH);
  digitalWrite(Pin1, LOW);
  digitalWrite(Pin2, LOW);
  digitalWrite(Pin3, HIGH);
  break;
  default:
  digitalWrite(Pin0, LOW);
  digitalWrite(Pin1, LOW);
  digitalWrite(Pin2, LOW);
  digitalWrite(Pin3, LOW);
  break;
}
if(dir){
  _step++;
 }else{
  _step--;
}
if(_step>7){
  _step=0;
}
if(_step<0){
  _step=7;
}
   delayMicroseconds(800);
}
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