dm542_Ｃ５１_coverh65_dm542_51单片机DM542_57步进电机；_

#include <reg52.h> #include <intrins.h> #define uchar unsigned char #define uint unsigned int sbit PUL=P1^2; //位定义PUL sbit DIR=P1^0; //位定义DIR sbit ENA=P1^1; //位定义ENA uchar i; void delay (uint z)//延时函数 { uint x,y; for(x=z;x>0;x--) for(y=14;y>0;y--); } void delay_us(uint x ) { for (i=0;i<x;i++) { _nop_(); } } void main() { DIR = 0; ENA = 1; delay(100); while(1) { PUL = 0; delay_us(1); PUL = 1; delay_us(6); //7--18 ,4--25 , 5--22.4 6--20.2 } }