linux串口接收处理

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <termios.h>

#define SERIAL_PORT "/dev/ttyS0"
#define BAUD_RATE B9600

int main() {
    int fd;
    struct termios options;
    char buffer[256];

    // 打开串口设备
    fd = open(SERIAL_PORT, O_RDWR | O_NOCTTY | O_NDELAY);
    if (fd == -1) {
        perror("Failed to open serial port");
        return -1;
    }

    // 设置串口参数
    tcgetattr(fd, &options);
    cfsetispeed(&options, BAUD_RATE);
    cfsetospeed(&options, BAUD_RATE);
    options.c_cflag |= (CLOCAL | CREAD);
    options.c_cflag &= ~PARENB;
    options.c_cflag &= ~CSTOPB;
    options.c_cflag &= ~CSIZE;
    options.c_cflag |= CS8;
    options.c_lflag &= ~(ICANON | ECHO | ECHOE | ISIG);
    options.c_oflag &= ~OPOST;
    tcsetattr(fd, TCSANOW, &options);

    // 接收数据
    while (1) {
        int n = read(fd, buffer, sizeof(buffer) - 1);
        if (n > 0) {
            buffer[n] = '\0';
            printf("Received: %s\n", buffer);
        }
        usleep(100000); // 延时100ms
    }

    // 关闭串口设备
    close(fd);
    return 0;
}