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我想通过pc直接发脉冲给步进电机驱动器(不带串口通信模块),控制步进电机启停动作;脉冲经USB端口DATA+和DATA-连接步进驱动器plus+和plus-,方向接头悬空。结果电机没有反应。情况可能如下:1)端口地址没弄对,脉冲没输出去;2)步进驱动器不接受经串口协议封装的信号。请问如何解决?谢谢。代码如下:
// pulse_emission.cpp : 定义控制台应用程序的入口点。//
#include "stdafx.h"
#include <stdio.h>//</stdio.h>
#include <time.h>//</time.h>
#include <conio.h>//</conio.h>
//脉冲宽50ms;
const unsigned pulseWidthPlus = 50;
//脉冲槽宽50ms;
const unsigned pulseWidthMinus = 50;
//脉冲周期宽度100ms;
const unsigned pulseCycle = pulseWidthPlus + pulseWidthMinus;
void delay(clock_t nms)
{
clock_t start;
start = clock();
while((clock() - start) * CLOCKS_PER_SEC / 1000 < nms);
}
void output(int *port, char polarity)
{
int peak = 0;
if(polarity == '+') peak = 1;
else if(polarity == '-') peak = -1;
*port = peak;
}
void writeWaveform(int *port,unsigned pulseWidth, unsigned cycle, char polarity)
{
output(port,polarity);
delay(pulseWidth);
output(port,0);
delay(cycle - pulseWidth);
}
int _tmain(int argc, _TCHAR* argv[])
{
char ch = 0,nch;
int p = 5; // p的值端口地址(这里用内存单元表示)
int *port = &p;
while(1)
{
writeWaveform(port,pulseWidthPlus,pulseCycle,ch);
if(kbhit())
{
nch = _getch();
if(nch == 0X1B) break; // <esc> 退出</esc>
if(nch == ch && nch != '+' && nch != '-') continue;
if(nch == '+') printf("正在输出正脉冲。\n");
else printf("正在输出负脉冲。\n");
delay(10 * pulseCycle); // 转换输出脉冲极性时,需间隔的时间
ch = nch;
}
}
return 0;
}
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