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Embedded Linux µÄ»ù±¾¿´·¨

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Embedded Linux µÄ´úÂëʾÀý

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

#define LED_PATH "/sys/class/leds/led0/brightness"

int main() {
    int fd;
    char buf[2];

    fd = open(LED_PATH, O_WRONLY);
    if (fd < 0) {
        perror("Error opening LED file");
        exit(1);
    }

    // ¿ØÖÆ LED µÆÁÁ
    buf[0] = '1';
    write(fd, buf, 1);

    sleep(2); // ÑÓʱ 2 Ãë

    // ¿ØÖÆ LED µÆÃð
    buf[0] = '0';
    write(fd, buf, 1);

    close(fd);

    return 0;
}

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