linux c++ 串口通信封装代码

你好，以下是一个基本的串口通信封装代码示例：

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

int set_port(int fd, int baud_rate) {
    struct termios options;
    tcgetattr(fd, &options);
    switch (baud_rate) {
        case 9600:
            cfsetispeed(&options, B9600);
            cfsetospeed(&options, B9600);
            break;
        case 19200:
            cfsetispeed(&options, B19200);
            cfsetospeed(&options, B19200);
            break;
        case 38400:
            cfsetispeed(&options, B38400);
            cfsetospeed(&options, B38400);
            break;
        case 57600:
            cfsetispeed(&options, B57600);
            cfsetospeed(&options, B57600);
            break;
        case 115200:
            cfsetispeed(&options, B115200);
            cfsetospeed(&options, B115200);
            break;
        default:
            return -1;
    }
    options.c_cflag |= CLOCAL;
    options.c_cflag |= CREAD;
    options.c_cflag &= ~CSIZE;
    options.c_cflag |= CS8;
    options.c_cflag &= ~PARENB;
    options.c_cflag &= ~CSTOPB;
    options.c_cc[VMIN] = 1;
    options.c_cc[VTIME] = 0;
    tcflush(fd, TCIFLUSH);
    if (tcsetattr(fd, TCSANOW, &options) != 0) {
        return -1;
    }
    return 0;
}

int open_port(char *port_name) {
    int fd;
    fd = open(port_name, O_RDWR | O_NOCTTY | O_NDELAY);
    if (fd == -1) {
        return -1;
    }
    fcntl(fd, F_SETFL, 0);
    return fd;
}

int serial_send(int fd, char *data) {
    int len = strlen(data);
    int res = write(fd, data, len);
    if (res != len) {
        return -1;
    }
    return 0;
}

int serial_receive(int fd, char *buffer, int buffer_size) {
    memset(buffer, 0, buffer_size);
    int res = read(fd, buffer, buffer_size - 1);
    if (res == -1) {
        return -1;
    }
    buffer[res] = 0;
    return res;
}

int main(int argc, char *argv[]) {
    int fd;
    char buffer[256];
    fd = open_port("/dev/ttyS0");
    if (fd == -1) {
        printf("Failed to open serial port!\n");
        exit(1);
    }
    set_port(fd, 9600);
    while (1) {
        printf("Please enter data to send (q to quit):\n");
        fgets(buffer, sizeof(buffer), stdin);
        if (buffer[0] == 'q') {
            break;
        }
        serial_send(fd, buffer);
        serial_receive(fd, buffer, sizeof(buffer));
        printf("%s\n", buffer);
    }
    close(fd);
    return 0;
}

希望对你有帮助！