linux串口发送成功

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

int main() {
    int fd;
    struct termios options;
    char *dev = "/dev/ttyS0"; // 串口设备文件
    char data[] = "Hello, Serial Port!";

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

    // 配置串口
    tcgetattr(fd, &options);
    cfsetispeed(&options, B9600); // 设置波特率为9600
    cfsetospeed(&options, B9600);
    options.c_cflag |= (CLOCAL | CREAD);
    options.c_cflag &= ~PARENB;
    options.c_cflag &= ~CSTOPB;
    options.c_cflag &= ~CSIZE;
    options.c_cflag |= CS8;
    tcsetattr(fd, TCSANOW, &options);

    // 发送数据
    int len = write(fd, data, sizeof(data) - 1);
    if (len == -1) {
        perror("Failed to write to serial port");
    } else {
        printf("Sent %d bytes to serial port\n", len);
    }

    // 关闭串口设备文件
    close(fd);

    return 0;
}