c windows串口读写
时间: 2023-07-25 16:11:40 浏览: 44
你可以使用Windows API来进行串口读写。以下是一个简单的示例代码:
```c
#include <stdio.h>
#include <windows.h>
int main()
{
HANDLE hSerial;
DCB dcbSerialParams = {0};
COMMTIMEOUTS timeouts = {0};
DWORD dwBytesRead = 0;
char read_buffer[256] = {0};
// 打开串口
hSerial = CreateFile("COM1", GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
if (hSerial == INVALID_HANDLE_VALUE) {
printf("Error: Unable to open serial port\n");
return 1;
}
// 配置串口参数
dcbSerialParams.DCBlength = sizeof(dcbSerialParams);
if (!GetCommState(hSerial, &dcbSerialParams)) {
printf("Error: Unable to get serial port state\n");
CloseHandle(hSerial);
return 1;
}
dcbSerialParams.BaudRate = CBR_9600;
dcbSerialParams.ByteSize = 8;
dcbSerialParams.StopBits = ONESTOPBIT;
dcbSerialParams.Parity = NOPARITY;
if (!SetCommState(hSerial, &dcbSerialParams)) {
printf("Error: Unable to set serial port state\n");
CloseHandle(hSerial);
return 1;
}
// 配置读取超时时间
timeouts.ReadIntervalTimeout = 50;
timeouts.ReadTotalTimeoutConstant = 50;
timeouts.ReadTotalTimeoutMultiplier = 10;
if (!SetCommTimeouts(hSerial, &timeouts)) {
printf("Error: Unable to set serial port timeouts\n");
CloseHandle(hSerial);
return 1;
}
// 读取串口数据
if (!ReadFile(hSerial, read_buffer, sizeof(read_buffer), &dwBytesRead, NULL)) {
printf("Error: Unable to read from serial port\n");
CloseHandle(hSerial);
return 1;
}
printf("Read %d bytes from serial port: %s\n", dwBytesRead, read_buffer);
// 关闭串口
CloseHandle(hSerial);
return 0;
}
```
在上面的示例代码中,我们打开了COM1串口,并将波特率设置为9600,数据位设置为8,停止位设置为1,无奇偶校验。然后,我们读取串口数据,并将其输出到控制台上。你可以根据自己的需求修改代码。