VC6.0与34401通信
时间: 2023-09-20 21:03:39 浏览: 36
要让VC6.0与34401通信,您需要使用34401的通信协议来编写VC6.0应用程序。34401通信协议通常是通过串行端口实现的。
以下是一个简单的示例代码,用于在VC6.0中使用34401通信协议:
```c++
#include <windows.h>
#include <stdio.h>
int main() {
HANDLE hCom;
DCB dcb;
COMMTIMEOUTS timeouts;
char buffer[1024];
DWORD read, written;
BOOL success;
// 打开串口
hCom = CreateFile("COM1", GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, 0, NULL);
if (hCom == INVALID_HANDLE_VALUE) {
printf("Error: Unable to open COM1\n");
return 1;
}
// 配置串口
dcb.DCBlength = sizeof(DCB);
success = GetCommState(hCom, &dcb);
if (!success) {
printf("Error: Unable to get comm state\n");
CloseHandle(hCom);
return 1;
}
dcb.BaudRate = CBR_9600;
dcb.ByteSize = 8;
dcb.Parity = NOPARITY;
dcb.StopBits = ONESTOPBIT;
success = SetCommState(hCom, &dcb);
if (!success) {
printf("Error: Unable to set comm state\n");
CloseHandle(hCom);
return 1;
}
// 设置超时
timeouts.ReadIntervalTimeout = 50;
timeouts.ReadTotalTimeoutMultiplier = 10;
timeouts.ReadTotalTimeoutConstant = 100;
timeouts.WriteTotalTimeoutMultiplier = 10;
timeouts.WriteTotalTimeoutConstant = 100;
success = SetCommTimeouts(hCom, &timeouts);
if (!success) {
printf("Error: Unable to set comm timeouts\n");
CloseHandle(hCom);
return 1;
}
// 读取数据
success = ReadFile(hCom, buffer, sizeof(buffer), &read, NULL);
if (!success) {
printf("Error: Unable to read from COM1\n");
CloseHandle(hCom);
return 1;
}
printf("Read %d bytes: %s\n", read, buffer);
// 写入数据
success = WriteFile(hCom, "Hello world!", 12, &written, NULL);
if (!success) {
printf("Error: Unable to write to COM1\n");
CloseHandle(hCom);
return 1;
}
printf("Wrote %d bytes\n", written);
// 关闭串口
CloseHandle(hCom);
return 0;
}
```
以上代码仅供参考,具体实现需要根据34401通信协议的具体要求进行编写。