mbed_example / Mbed OS DigitalIn_HelloWorld

DigitalIn Hello World

Fork of DigitalIn_HelloWorld_Mbed by Mbed

Use

The DigitalIn API is used to read a digital pin. The value will be either 0 or 1. Buttons and switches are some of the more common digital inputs.

API

API reference.

Import librarymbed

No documentation found.

main.cpp@7:64e67ec4441e, 2015-03-27 (annotated)

Committer:
mbedAustin
Date:
Fri Mar 27 21:24:54 2015 +0000
Revision:
7:64e67ec4441e
Parent:
6:315942f167d7
Child:
8:ef3558374977
removed check requirement

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbedAustin 4:9b20ef58e04c 1 /* mbed Example Program
mbedAustin 4:9b20ef58e04c 2 * Copyright (c) 2006-2014 ARM Limited
mbedAustin 4:9b20ef58e04c 3 *
mbedAustin 4:9b20ef58e04c 4 * Licensed under the Apache License, Version 2.0 (the "License");
mbedAustin 4:9b20ef58e04c 5 * you may not use this file except in compliance with the License.
mbedAustin 4:9b20ef58e04c 6 * You may obtain a copy of the License at
mbedAustin 4:9b20ef58e04c 7 *
mbedAustin 4:9b20ef58e04c 8 * http://www.apache.org/licenses/LICENSE-2.0
mbedAustin 4:9b20ef58e04c 9 *
mbedAustin 4:9b20ef58e04c 10 * Unless required by applicable law or agreed to in writing, software
mbedAustin 4:9b20ef58e04c 11 * distributed under the License is distributed on an "AS IS" BASIS,
mbedAustin 4:9b20ef58e04c 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mbedAustin 4:9b20ef58e04c 13 * See the License for the specific language governing permissions and
mbedAustin 4:9b20ef58e04c 14 * limitations under the License.
mbedAustin 4:9b20ef58e04c 15 */
mbed_official 0:aaf5a9d465fd 16 #include "mbed.h"
mbedAustin 5:fa65447e171b 17
mbedAustin 6:315942f167d7 18 DigitalIn mypin(BUTTON1); // change this to the button on your board
mbedAustin 5:fa65447e171b 19 DigitalOut myled(LED1);
mbedAustin 5:fa65447e171b 20
mbedAustin 5:fa65447e171b 21 int main()
mbedAustin 5:fa65447e171b 22 {
mbedAustin 7:64e67ec4441e 23 // check mypin object is initialized and connected to a pin
mbedAustin 7:64e67ec4441e 24 if(mypin.is_connected()) {
mbedAustin 5:fa65447e171b 25 printf("mypin is connected and initialized! \n\r");
mbedAustin 5:fa65447e171b 26 }
mbedAustin 5:fa65447e171b 27
mbedAustin 7:64e67ec4441e 28 // Optional: set mode as PullUp/PullDown/PullNone/OpenDrain
mbedAustin 7:64e67ec4441e 29 mypin.mode(PullNone); /
mbedAustin 5:fa65447e171b 30
mbedAustin 5:fa65447e171b 31 // press the button and see the console / led change
mbed_official 0:aaf5a9d465fd 32 while(1) {
mbedAustin 5:fa65447e171b 33 printf("mypin has value : %d \n\r", mypin.read());
mbedAustin 5:fa65447e171b 34 myled = mypin; // toggle led based on value of button
mbed_official 0:aaf5a9d465fd 35 wait(0.25);
mbed_official 0:aaf5a9d465fd 36 }
mbedAustin 5:fa65447e171b 37 }