File content as of revision 5:e17647bbb68e:

/* mbed Example Program
 * Copyright (c) 2006-2014 ARM Limited
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
#include "mbed.h"

DigitalOut myled(LED1);

int main() {
    int connected = myled.is_connected();   // check that myled object is initialized and connected to a pin
    if(connected){
        printf("myleD is initialized and connected!\n\r");
    }
    
    while(1) {
        myled = 1;          // set LED1 pin to high
        printf("\n\r myled = %d",myled);
        wait(0.5);
        
        myled.write(0);     // set LED1 pin to low
        printf("\n\r myled = %d",myled.read() );
        wait(0.5);
    }
}