用C语言编写串口1发送数据给串口2程序代码
时间: 2024-05-11 11:19:58 浏览: 14
以下是用C语言编写的串口1发送数据给串口2的程序代码,假设串口1的端口号为COM1,串口2的端口号为COM2,波特率为9600,数据位为8位,停止位为1位,无校验位:
```c
#include <windows.h>
int main()
{
HANDLE hComm1, hComm2;
char data[100] = "Hello World!"; // 要发送的数据
DWORD dwBytesWritten;
// 打开串口1
hComm1 = CreateFile("COM1", GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, 0, NULL);
if (hComm1 == INVALID_HANDLE_VALUE)
{
printf("Failed to open COM1!\n");
return 1;
}
// 打开串口2
hComm2 = CreateFile("COM2", GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, 0, NULL);
if (hComm2 == INVALID_HANDLE_VALUE)
{
printf("Failed to open COM2!\n");
CloseHandle(hComm1);
return 1;
}
// 配置串口1的参数
DCB dcb1;
GetCommState(hComm1, &dcb1);
dcb1.BaudRate = CBR_9600;
dcb1.ByteSize = 8;
dcb1.Parity = NOPARITY;
dcb1.StopBits = ONESTOPBIT;
SetCommState(hComm1, &dcb1);
// 配置串口2的参数
DCB dcb2;
GetCommState(hComm2, &dcb2);
dcb2.BaudRate = CBR_9600;
dcb2.ByteSize = 8;
dcb2.Parity = NOPARITY;
dcb2.StopBits = ONESTOPBIT;
SetCommState(hComm2, &dcb2);
// 发送数据
if (WriteFile(hComm1, data, strlen(data), &dwBytesWritten, NULL))
{
printf("Data sent to COM1: %s\n", data);
if (WriteFile(hComm2, data, strlen(data), &dwBytesWritten, NULL))
{
printf("Data sent to COM2: %s\n", data);
}
else
{
printf("Failed to send data to COM2!\n");
}
}
else
{
printf("Failed to send data to COM1!\n");
}
// 关闭串口
CloseHandle(hComm1);
CloseHandle(hComm2);
return 0;
}
```
需要注意的是,串口的配置参数需要与接收端的参数一致,否则数据可能无法正常传输。另外,在实际使用中,还需要考虑数据的传输方式、数据格式等问题。
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