51單片機(jī)控制步進(jìn)電機(jī)程序及硬件電路圖

1、 #include <AT89X51.h> static unsigned int count; /計(jì)數(shù)static int step_index; /步進(jìn)索引數(shù)，值為07static bit turn; /步進(jìn)電機(jī)轉(zhuǎn)動(dòng)方向static bit stop_flag; /步進(jìn)電機(jī)停止標(biāo)志static int speedlevel; /步進(jìn)電機(jī)轉(zhuǎn)速參數(shù)，數(shù)值越大速度越慢，最小值為1，速度最快static int spcount; /步進(jìn)電機(jī)轉(zhuǎn)速參數(shù)計(jì)數(shù)void delay(unsigned int endcount); /延時(shí)函數(shù)，延時(shí)為endcount*0.5毫秒void gorun

2、(); /步進(jìn)電機(jī)控制步進(jìn)函數(shù)void main(void) count = 0; step_index = 0; spcount = 0; stop_flag = 0; P1_0 = 0; P1_1 = 0; P1_2 = 0; P1_3 = 0; EA = 1; /允許CPU中斷 TMOD = 0x11; /設(shè)定時(shí)器0和1為16位模式1 ET0 = 1; /定時(shí)器0中斷允許 TH0 = 0xFE; TL0 = 0x0C; /設(shè)定時(shí)每隔0.5ms中斷一次 TR0 = 1; /開(kāi)始計(jì)數(shù) turn = 0; speedlevel = 2; delay(10000); speedlevel = 1

3、; do speedlevel = 2; delay(10000); speedlevel = 1; delay(10000); stop_flag=1; delay(10000); stop_flag=0; while(1); /定時(shí)器0中斷處理 void timeint(void) interrupt 1 TH0=0xFE; TL0=0x0C; /設(shè)定時(shí)每隔0.5ms中斷一次 count+; spcount-; if(spcount<=0) spcount = speedlevel; gorun(); void delay(unsigned int endcount) count=0

4、; dowhile(count<endcount);void gorun() if (stop_flag=1) P1_0 = 0; P1_1 = 0; P1_2 = 0; P1_3 = 0; return; switch(step_index) case 0: /0 P1_0 = 1; P1_1 = 0; P1_2 = 0; P1_3 = 0; break; case 1: /0、1 P1_0 = 1; P1_1 = 1; P1_2 = 0; P1_3 = 0; break; case 2: /1 P1_0 = 0; P1_1 = 1; P1_2 = 0; P1_3 = 0; break

5、; case 3: /1、2 P1_0 = 0; P1_1 = 1; P1_2 = 1; P1_3 = 0; break; case 4: /2 P1_0 = 0; P1_1 = 0; P1_2 = 1; P1_3 = 0; break; case 5: /2、3 P1_0 = 0; P1_1 = 0; P1_2 = 1; P1_3 = 1; break; case 6: /3 P1_0 = 0; P1_1 = 0; P1_2 = 0; P1_3 = 1; break; case 7: /3、0 P1_0 = 1; P1_1 = 0; P1_2 = 0; P1_3 = 1; if (turn=0) step_index+; if (step