在C语言中,可以使用以下步骤来截取串口数据:
引入头文件
```c
include include include include include include include ``` ```c int serial_fd = open("/dev/ttyS0", O_RDWR); if (serial_fd == -1) { perror("无法打开串口"); exit(1); } ``` ```c struct termios options; tcgetattr(serial_fd, &options); cfsetispeed(&options, B9600); // 设置波特率为9600 cfsetospeed(&options, B9600); options.c_cflag |= (CLOCAL | CREAD); // 启用接收和本地模式 options.c_cflag &= ~PARENB; // 无校验位 options.c_cflag &= ~CSTOPB; // 1个停止位 options.c_cflag &= ~CSIZE; // 数据位掩码 options.c_cflag |= CS8; // 8个数据位 tcsetattr(serial_fd, TCSANOW, &options); ``` ```c char buffer[MAX_BUFF_SIZE]; while (1) { int nread = read(serial_fd, buffer, MAX_BUFF_SIZE - 1); if (nread == -1) { perror("读取串口数据失败"); exit(1); } else if (nread == 0) { printf("串口已关闭\n"); break; } buffer[nread] = '\0'; printf("接收到的数据: %s\n", buffer); } ``` ```c close(serial_fd); ``` 示例代码 ```c include include include include include include include define MAX_BUFF_SIZE 256 int main() { int serial_fd = open("/dev/ttyS0", O_RDWR); if (serial_fd == -1) { perror("无法打开串口"); exit(1); } struct termios options; tcgetattr(serial_fd, &options); cfsetispeed(&options, B9600); // 设置波特率为9600 cfsetospeed(&options, B9600); options.c_cflag |= (CLOCAL | CREAD); // 启用接收和本地模式 options.c_cflag &= ~PARENB; // 无校验位 options.c_cflag &= ~CSTOPB; // 1个停止位 options.c_cflag &= ~CSIZE; // 数据位掩码 options.c_cflag |= CS8; // 8个数据位 tcsetattr(serial_fd, TCSANOW, &options); char buffer[MAX_BUFF_SIZE]; while (1) { int nread = read(serial_fd, buffer, MAX_BUFF_SIZE - 1); if (nread == -1) { perror("读取串口数据失败"); exit(1); } else if (nread == 0) { printf("串口已关闭\n"); break; } buffer[nread] = '\0'; printf("接收到的数据: %s\n", buffer); } close(serial_fd); return 0; } ``` 注意事项 `/dev/ttyS0` 或 `/打开串口
配置串口
读取串口数据
关闭串口
串口设备路径: