linux串口中断接收程序

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

void serial_isr(int fd) {
    char buffer[256];
    int n = read(fd, buffer, sizeof(buffer));
    if (n > 0) {
        buffer[n] = '\0';
        printf("Received data: %s\n", buffer);
    }
}

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

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

    // 配置串口参数
    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;
    options.c_lflag &= ~(ICANON | ECHO | ECHOE | ISIG);
    options.c_oflag &= ~OPOST;
    tcsetattr(fd, TCSANOW, &options);

    // 设置中断处理
    fcntl(fd, F_SETOWN, getpid());
    int flags = fcntl(fd, F_GETFL, 0);
    fcntl(fd, F_SETFL, flags | O_ASYNC);

    while (1) {
        pause(); // 等待中断信号
    }

    close(fd);
    return 0;
}