无人机同时链接两个串口的c语言代码

以下是使用C语言同时链接两个串口的基本代码示例：

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

int main(int argc, char *argv[]) {
    int fd1, fd2;
    struct termios options;
    char buf[255];

    // 打开串口1
    fd1 = open("/dev/ttyUSB0", O_RDWR | O_NOCTTY | O_NDELAY);
    if (fd1 == -1) {
        perror("Cannot open serial port 1.\n");
        exit(EXIT_FAILURE);
    }

    // 打开串口2
    fd2 = open("/dev/ttyUSB1", O_RDWR | O_NOCTTY | O_NDELAY);
    if (fd2 == -1) {
        perror("Cannot open serial port 2.\n");
        exit(EXIT_FAILURE);
    }

    // 设置串口1参数
    tcgetattr(fd1, &options);
    cfsetispeed(&options, B9600);
    cfsetospeed(&options, B9600);
    options.c_cflag &= ~PARENB;
    options.c_cflag &= ~CSTOPB;
    options.c_cflag &= ~CSIZE;
    options.c_cflag |= CS8;
    options.c_cflag &= ~CRTSCTS;
    options.c_cflag |= CREAD | CLOCAL;
    options.c_iflag &= ~(IXON | IXOFF | IXANY);
    options.c_lflag &= ~(ICANON | ECHO | ECHOE | ISIG);
    options.c_oflag &= ~OPOST;
    options.c_cc[VMIN] = 1;
    options.c_cc[VTIME] = 0;
    tcsetattr(fd1, TCSANOW, &options);

    // 设置串口2参数
    tcgetattr(fd2, &options);
    cfsetispeed(&options, B9600);
    cfsetospeed(&options, B9600);
    options.c_cflag &= ~PARENB;
    options.c_cflag &= ~CSTOPB;
    options.c_cflag &= ~CSIZE;
    options.c_cflag |= CS8;
    options.c_cflag &= ~CRTSCTS;
    options.c_cflag |= CREAD | CLOCAL;
    options.c_iflag &= ~(IXON | IXOFF | IXANY);
    options.c_lflag &= ~(ICANON | ECHO | ECHOE | ISIG);
    options.c_oflag &= ~OPOST;
    options.c_cc[VMIN] = 1;
    options.c_cc[VTIME] = 0;
    tcsetattr(fd2, TCSANOW, &options);

    // 读取数据并转发
    while (1) {
        memset(buf, 0, sizeof(buf));
        if (read(fd1, buf, sizeof(buf)) != -1) {
            write(fd2, buf, strlen(buf));
        }
        memset(buf, 0, sizeof(buf));
        if (read(fd2, buf, sizeof(buf)) != -1) {
            write(fd1, buf, strlen(buf));
        }
    }

    // 关闭串口
    close(fd1);
    close(fd2);

    return 0;
}

这段代码打开了两个串口`/dev/ttyUSB0`和`/dev/ttyUSB1`，并分别设置了相同的参数。在主循环中，读取一个串口的数据并将其发送到另一个串口，以实现串口数据的转发。