MFC CserialPort串口通信 多线程

[zyqaly]

写的程序中用到了CSerialPort类来实现串口数据的读写。现打算实现这样一个功能：上位机循环不断的发指令到下位机（上下位机通过无线数传电台连到串口进行通信），下位机收到后返回应答，上位机收到应答后停止发送。
我现在在发送的命令按钮里用CSerialPort类的writetoport()方法可实现一次写，但放在循环里，重复写，应用程序有时就不响应其他动作。
想到的解决方法是，在命令按钮里创建一个线程，在线程处理函数中写一个循环，循环体为CSerialPort类的writetoport()方法。但碰到的问题是，一运行就提示：该内存不能读，不能写等错误。
请教各位：如何在线程中调用CSerialPort类的writetoport()方法？或有没有别的解决方法。谢谢！

[赵4老师]

仅供参考：

#pragma comment(lib,"user32")
#include <stdio.h>
#include <time.h>
#include <sys/timeb.h>
#include <windows.h>
char datestr[16];
char timestr[16];
char mss[4];
void log(char *s) {
    struct tm *now;
    struct timeb tb;

    ftime(&tb);
    now=localtime(&tb.time);
    sprintf(datestr,"%04d-%02d-%02d",now->tm_year+1900,now->tm_mon+1,now->tm_mday);
    sprintf(timestr,"%02d:%02d:%02d",now->tm_hour     ,now->tm_min  ,now->tm_sec );
    sprintf(mss,"%03d",tb.millitm);
    printf("%s %s.%s %s",datestr,timestr,mss,s);
}
VOID CALLBACK myTimerProc1(
  HWND hwnd, // handle of window for timer messages
  UINT uMsg, // WM_TIMER message
  UINT idEvent, // timer identifier
  DWORD dwTime // current system time
) {
 log("In myTimerProc1\n");
}
VOID CALLBACK myTimerProc2(
  HWND hwnd, // handle of window for timer messages
  UINT uMsg, // WM_TIMER message
  UINT idEvent, // timer identifier
  DWORD dwTime // current system time
) {
 log("In myTimerProc2\n");
}
int main() {
    int i;
    MSG msg;

    SetTimer(NULL,0,1000,myTimerProc1);
    SetTimer(NULL,0,2000,myTimerProc2);
    for (i=0;i<20;i++) {
        Sleep(500);
        log("In main\n");
        if (GetMessage(&msg,NULL,0,0)) {
            TranslateMessage(&msg);
            DispatchMessage(&msg);
        }

    }
    return 0;
}
//2012-07-26 17:29:06.375 In main
//2012-07-26 17:29:06.875 In myTimerProc1
//2012-07-26 17:29:07.375 In main
//2012-07-26 17:29:07.875 In myTimerProc2
//2012-07-26 17:29:08.375 In main
//2012-07-26 17:29:08.375 In myTimerProc1
//2012-07-26 17:29:08.875 In main
//2012-07-26 17:29:08.875 In myTimerProc1
//2012-07-26 17:29:09.375 In main
//2012-07-26 17:29:09.890 In myTimerProc2
//2012-07-26 17:29:10.390 In main
//2012-07-26 17:29:10.390 In myTimerProc1
//2012-07-26 17:29:10.890 In main
//2012-07-26 17:29:10.890 In myTimerProc1
//2012-07-26 17:29:11.390 In main
//2012-07-26 17:29:11.890 In myTimerProc2
//2012-07-26 17:29:12.390 In main
//2012-07-26 17:29:12.390 In myTimerProc1
//2012-07-26 17:29:12.890 In main
//2012-07-26 17:29:12.890 In myTimerProc1
//2012-07-26 17:29:13.390 In main
//2012-07-26 17:29:13.890 In myTimerProc2
//2012-07-26 17:29:14.390 In main
//2012-07-26 17:29:14.390 In myTimerProc1
//2012-07-26 17:29:14.890 In main
//2012-07-26 17:29:14.890 In myTimerProc1
//2012-07-26 17:29:15.390 In main
//2012-07-26 17:29:15.890 In myTimerProc2
//2012-07-26 17:29:16.390 In main
//2012-07-26 17:29:16.390 In myTimerProc1
//2012-07-26 17:29:16.890 In main
//2012-07-26 17:29:16.890 In myTimerProc1
//2012-07-26 17:29:17.390 In main
//2012-07-26 17:29:17.890 In myTimerProc2
//2012-07-26 17:29:18.390 In main
//2012-07-26 17:29:18.390 In myTimerProc1
//2012-07-26 17:29:18.890 In main
//2012-07-26 17:29:18.890 In myTimerProc1
//2012-07-26 17:29:19.390 In main
//2012-07-26 17:29:19.890 In myTimerProc2

[叶恭介叶恭介]

上位机循环不断的发指令到下位机，用定时器，定时器那里处理是否收到应答，收到关闭定时器，否则发指令

[zgl7903]

Debug版本调试运行，出现错误提示时重试运行，结合调用堆栈，修改代码

[qq_33833904]

也可以使用这几个API函数：createFile 打开串口。setcommstate设置串口。readfile读串口数据。writefile写串口数据，closefile关闭串口数据。

[sevancheng]

内存访问错误？？调试看看

[赵4老师]

Multiple Threads in the User Interface http://msdn.microsoft.com/zh-cn/library/ms810439.aspx

[万里无缘]

帮你顶上去, 兄弟, 有没有试过用该类, 生成多个对象 打开多个串口?

[xinhaoda]

串口很简单 贴代码 或者我给你一个实例