linux串口通信驱动

# 检查权限
sudo chmod a+rw /dev/ttyS0

# 检查设备是否存在
ls /dev/ttyS*

# 检查设备是否被占用
lsof /dev/ttyS0

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

int main() {
    int fd;
    struct termios options;

    fd = open("/dev/ttyS0", O_RDWR | O_NOCTTY | O_NDELAY);
    if (fd == -1) {
        perror("open_port: Unable to open /dev/ttyS0");
        return -1;
    }

    tcgetattr(fd, &options);
    cfsetispeed(&options, B9600);
    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);

    // 进行数据传输

    close(fd);
    return 0;
}

options.c_cc[VTIME] = 10;  // 设置超时时间为10秒
options.c_cc[VMIN] = 0;