L297、L298驱动步进电机及其测试程序
ming
posted @ 2010年5月30日 13:16
in 电子技术
, 9199 阅读
基于ST公司的两相步进电机驱动芯片L297和L298的步进电机驱动方案，在工业应用中已经非常成熟了。通过Google和百度等搜索引擎，都能搜索到很多资料。这些资料中图文并茂，可以直接拿来使用。
这几日，忽心血来潮，自己非想倒腾一下，并将它作为自己的技术积累。所以就动手用proteus做了一个仿真电路，用Keil C编译了个测试程序，并实际测试，让电机转了起来。
电路图如下：
图中U1为L298是为功率放大模块；U2为L297为逻辑控制模块；U3为AT89C2051为控制芯片；其他阻容元件不在赘述。此电路非常简单易用。
测试程序如下:
//P1_0为方向输出端，P1_1为脉冲输出端
//本测试程序运行在8051系列单片机环境下
#include<reg51.h>
#define unit unsigned int
sbit CW=P1^0;
sbit CLK=P1^1;
unit time;
int m;
delay(){
for(m=0;m<10000;m++){;}
for(m=0;m<10000;m++){;}
for(m=0;m<10000;m++){;}
for(m=0;m<10000;m++){;}
for(m=0;m<10000;m++){;}
}
void timer0(void) interrupt 1 using 1{
if (time<=16000) /*脉冲数*/
{
TR0=0;
CLK=!CLK;
for(m=0;m<30;m++)
{
;
}
CLK=!CLK;
time++;
}
else {
TR0=0;
time=1;
CW=!CW; /*改变方向*/
delay();
}
TH0=(65536-1000)/256;
TL0=(65536-1000)%256;
TR0=1;
}
void main(void)
{
time=1;
TMOD=0x01;
CW=0;
CLK=0;
delay();
TH0=(65536-1000)/256;
TL0=(65536-1000)%256;
EA=1;
ET0=1;
TR0=1;
do {}
while (1);
}
L297、L298驱动两相步进电机的proteus仿真电路和测试程序打包下载连接如下：
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附件不能下载了，能补上吗
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