步距角为5.625°，减速比为1/64.
//数码管位 高位-----低位 //四个按键控制步进电机：正转，反转，加1，减1 //上电时电机启动，数码管上显示速度最小档1，加减档位均能通过数码管显示出来，电机采用单双八拍方式 //电机转速一共10档，通过按键调节转速 //电机正转时最高位数码管显示0，反转时显示1 #include<reg51.h> #define uchar unsigned char #define uint unsigned int #define led P0//数码管段选 //#define haha P2 sbit s1 = P3^4;sbit s2 = P3^5;sbit s3 = P3^6;sbit s4 =P3^7;//按键定义,s1正转，s2反转，s3加1，s4减1 sbit wei3 = P2^0;sbit wei2 = P2^2;sbit wei1 =P2^4;sbit wei0 = P2^6;//数码管位选定义 sbit a = P1^7;sbit b = P1^6;sbit c = P1^5;sbit d =P1^4;//脉冲信号输入端定义 uchar codetab[11]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0xff};//共阳数码管驱动信号0---9，不显示 uchar code time_counter[10][2]={{0xda,0x1c},{0xde,0xe4},{0xe1,0xec},{0xe5,0xd4},{0xe9,0xbc}, //9.7 ----1ms {0xed,0xa4},{0xf1,0x8c},{0xf5,0x74},{0xf9,0x5c},{0xfc,0x18}}; uchar codequdong[8]={0x80,0xc0,0x40,0x60,0x20,0x30,0x10,0x90}; uchar num1 = 0;//控制取励磁信号变量 uchar num2 = 8;
uchar k=1;//加减档位控制，1为最小档 bit flag1 = 0;//初始正转，正反转标志 uchar buf[4]={0,10,0,1};//数码管显示缓存，正转，不显示，不显示，显示1档位,高----低 //================================定时器0/1初始化函数================================ void T0_T1_init() { TMOD =0x11;//定时器0/1均工作于方式1,16位计时方式 TH1 = time_counter[k-1][0]; TL1 =time_counter[k-1][1];//定时器1，定时10ms用于步进电机转速控制 TR1 = 1; ET1= 1;//开定时器中断 EA = 1;//开总中断 } //================================ms级延时函数======================================= void delay1m(uint x) { uint i,j; for(i=0;i<x;i++) //连数x次，约 x ms for(j=0;j<120;j++); //数120 次，约1 ms } void display() { wei3=1;wei2=1;wei1=1;wei0=0;led= tab[buf[3]];delay1m(1);led=0xff; wei3=1;wei2=1;wei1=0;wei0=1;led = tab[buf[2]];delay1m(1);led=0xff; wei3=1;wei2=0;wei1=1;wei0=1;led = tab[buf[1]];delay1m(1);led=0xff; wei3=0;wei2=1;wei1=1;wei0=1;led= tab[buf[0]];delay1m(1);led=0xff; } //================================主函数============================================= void main() { T0_T1_init(); buf[1] =10;//不显示 while(1) { display(); if(s1== 0) { delay1m(3); if(s1== 0) { flag1= 0;//正转 buf[0]= 0;//最高位显示0 // haha = 0x00;//停止
} while(!s1)display(); } if(s2== 0 ) {
delay1m(3); if(s2== 0) {
flag1= 1;//反转 buf[0]= 1;//最高位显示1 // haha = 0x00;//停止 } while(!s2)display(); } if(s3== 0) //速度加1档 { delay1m(3); if(s3== 0) { k++; if(k> 10 ) { k = 1; } buf[2]=k/10; buf[3]=k%10; } while(!s3)display(); } if(s4== 0) //速度减1档 { delay1m(3); if(s4== 0) { k--; if(k== 0) { k = 10; } buf[2]=k/10; buf[3]=k%10; } while(!s4)display(); } }
} //==================================定时器1中断函数，用于脉冲频率控制===================================== void time1_interrupt()interrupt 3 { staticnum1 = 0; staticnum2 = 0; TH1 =time_counter[k-1][0]; TL1 =time_counter[k-1][1];//定时器1，定时1 用于步进电机转速控制 if(flag1== 0)//正转 { switch(num1) { case0:a = 1;b = 0;c = 0;d = 0;break; case1:a = 1;b = 1;c = 0;d = 0;break; case2:a = 0;b = 1;c = 0;d = 0;break; case3:a = 0;b = 1;c = 1;d = 0;break; case4:a = 0;b = 0;c = 1;d = 0;break; case5:a = 0;b = 0;c = 1;d = 1;break; case6:a = 0;b = 0;c = 0;d = 1;break; case7:a = 1;b = 0;c = 0;d = 1;break; } num1++; if(num1== 8)num1 = 0; } else //反转 { switch(num2) { case0:a = 1;b = 0;c = 0;d = 1;break; case1:a = 0;b = 0;c = 0;d = 1;break; case2:a = 0;b = 0;c = 1;d = 1;break; case3:a = 0;b = 0;c = 1;d = 0;break; case4:a = 0;b = 1;c = 1;d = 0;break; case5:a = 0;b = 1;c = 0;d = 0;break; case6:a = 1;b = 1;c = 0;d = 0;break; case7:a = 1;b = 0;c = 0;d = 0;break; } num2++; if(num2== 8)num2 = 0; } }
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