51单片机控制步进电机精确控制角度

#include <reg52.h> unsigned long beats=0; void startmotor(unsigned long angle); void main() { EA=1; TMOD=0X01; TH0=0XF8;//2ms TL0=0XCD; ET0=1; TR0=1; startmotor(360); while(1); } void startmotor(unsigned long angle) { EA=0; beats=(angle*4076)/360;//防止因为中断导致计算错误,因为以后的中断中需要使用到beats EA=1; } void InterruptTimer0() interrupt 1 { unsigned char tmp; static unsigned char index=0; unsigned char code beetcode[8]={0xe,0xc,0xd,0x9,0xb,0x3,0x7,0x6};//节拍对应IO口代码 TH0=0XF8; TL0=0XCD; if(beats!=0) { tmp=P1&0xf0; tmp|=beetcode[index]; P1=tmp; index++; if(index>=8)index=0; beats--; } else P1=P1|0X0F;//关闭所有相位 }