io.c

/*
     ____ __     ____   ___    ____ __         (((((()
    | |_  \ \  /   ) ) | |  ) | |_  \ \  /  \(@)- /
    |_|__  \_\/  __)_) |_|_/  |_|__  \_\/   /(@)- \
                                               ((())))
 */
#include <ctype.h>
#include <string.h>
#include <stdio.h>
#include "ev3.h"
#include "ev3_port.h"

/*  WARNING!
 *  Please build and install ev3dev-c static library before make this example.
 *  See README.
 */

int main( void )
{
    char s[ 256 ];
    int state;

    if ( ev3_init() < 1 ) return ( 1 );

    if ( ev3_listdir( "/sys/class/leds", s, sizeof( s ))) {
        printf( "leds folder: %s\n", s );
    } else {
        printf( "ERROR: ev3_listdir( leds )\n" );
    }
    if ( ev3_read_int( "/sys/class/leds/ev3:left:red:ev3dev/brightness", &state )) {
        if ( !ev3_write_int( "/sys/class/leds/ev3:left:red:ev3dev/brightness", ( state ) ? 0 : 255 )) {
            printf( "ERROR: ev3_write_int( brightness )\n" );
        }
    } else {
        printf( "ERROR: ev3_read_int( brightness )\n" );
    }
    if ( ev3_listdir( "/sys/class/lego-port", s, sizeof( s ))) {
        printf( "lego-port folder: %s\n", s );
    } else {
        printf( "ERROR: ev3_listdir( lego-port )\n" );
    }
    if ( ev3_listdir( "/sys/class/lego-sensor", s, sizeof( s ))) {
        printf( "lego-sensor folder: %s\n", s );
    } else {
        printf( "ERROR: ev3_listdir( lego-sensor )\n" );
    }
    if ( ev3_listdir( "/sys/class/tacho-motor", s, sizeof( s ))) {
        printf( "tacho-motor folder: %s\n", s );
    } else {
        printf( "ERROR: ev3_listdir( tacho-motor )\n" );
    }
    ev3_uninit();

    return ( 0 );
}