尊龙凯时人生就是搏

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ǶÈëʽ Linux ÊÇÒ»ÖÖÔÚǶÈëʽϵͳÖÐÔËÐÐµÄ Linux ²Ù×÷ϵͳ£¬Ëü¾ßÓпªÔ´ºÍ¿É¶¨ÖƵÄÌص㣬ÆÕ±éÓ¦ÓÃÓÚÖÖÖÖǶÈëʽװ±¸ÖС£Ïàʶ Embedded Linux µÄ»ù±¾¿´·¨¹ØÓÚ´ÓÊÂǶÈëʽ¿ª·¢ÊÂÇéµÄÖ°Ô±ºÜÊÇÖ÷Òª£¬±¾ÎĽ«´Ó»ù±¾¿´·¨ÈëÊÖ£¬ÍŽáÏêϸµÄ´úÂëʾÀýÀ´ÏÈÈÝ Embedded Linux µÄÏà¹Ø֪ʶ¡£

Embedded Linux µÄ»ù±¾¿´·¨

ÄںˣºLinux ÄÚºËÊÇ Embedded Linux µÄ½¹µã²¿·Ö£¬ËüÖÎÀíÓ²¼þ×ÊÔ´¡¢ÌṩϵͳŲÓýӿÚ£¬²¢ÈÏÕæµ÷ÀíºÍÖÎÀíϵͳ×ÊÔ´¡£Ç¶Èëʽװ±¸µÄÓ²¼þÖ§³ÖºÍ¹¦Ð§ÊµÏÖ¶¼ÒÀÀµÓÚ Linux Äںˡ£

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Embedded Linux µÄ´úÂëʾÀý

½ÓÏÂÀ´£¬ÎÒÃǽ«Í¨¹ýÒ»¸ö¼òÆ LED ¿ØÖƵĴúÂëʾÀýÀ´ÑÝʾÔõÑùÔÚ Embedded Linux ÖбàдºÍÔËÐÐÓ¦ÓóÌÐò¡£ÎÒÃǼÙÉ迪·¢°åÉÏÅþÁ¬ÁËÒ»¸ö LED µÆ£¬²¢ÇÒÒѾ­¼ÓÔØÁËÏìÓ¦µÄÄÚºËÄ£¿é¡£

#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;
}

µÇ¼ºó¸´ÖÆ

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