Linux 关闭串口接收

stty -F /dev/ttyS0 -icanon -echo

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

int main() {
    int fd = open("/dev/ttyS0", O_RDWR | O_NOCTTY);
    if (fd == -1) {
        perror("open");
        return 1;
    }

    struct termios options;
    tcgetattr(fd, &options);
    options.c_cflag &= ~ICANON; // 关闭规范模式
    options.c_cflag &= ~ECHO;   // 关闭回显
    tcsetattr(fd, TCSANOW, &options);

    close(fd);
    return 0;
}

#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/select.h>

int main() {
    int fd = open("/dev/ttyS0", O_RDWR | O_NOCTTY);
    if (fd == -1) {
        perror("open");
        return 1;
    }

    fd_set readfds;
    FD_ZERO(&readfds);
    FD_SET(fd, &readfds);

    struct timeval timeout;
    timeout.tv_sec = 0;
    timeout.tv_usec = 0;

    int ret = select(fd + 1, &readfds, NULL, NULL, &timeout);
    if (ret == -1) {
        perror("select");
    } else if (ret == 0) {
        // 超时，没有数据可读
        printf("No data available to read.\n");
    } else {
        if (FD_ISSET(fd, &readfds)) {
            // 有数据可读，但我们可以选择不读取
            printf("Data is available, but we choose not to read it.\n");
        }
    }

    close(fd);
    return 0;
}

close(/dev/ttyS0)

close(fd);