DigitalIn Hello World
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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
main.cpp@4:9b20ef58e04c, 2015-03-27 (annotated)
- Committer:
- mbedAustin
- Date:
- Fri Mar 27 20:13:29 2015 +0000
- Revision:
- 4:9b20ef58e04c
- Parent:
- 3:e2f865861a7a
- Child:
- 5:fa65447e171b
Added license to main.c file.
Who changed what in which revision?
User | Revision | Line number | New 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" |
mbed_official | 0:aaf5a9d465fd | 17 | |
mbed_official | 0:aaf5a9d465fd | 18 | DigitalIn enable(p5); |
mbed_official | 0:aaf5a9d465fd | 19 | DigitalOut led(LED1); |
mbed_official | 0:aaf5a9d465fd | 20 | |
mbedAustin | 3:e2f865861a7a | 21 | // blink LED when enable line is high |
mbed_official | 0:aaf5a9d465fd | 22 | int main() { |
mbed_official | 0:aaf5a9d465fd | 23 | while(1) { |
mbed_official | 0:aaf5a9d465fd | 24 | if(enable) { |
mbed_official | 0:aaf5a9d465fd | 25 | led = !led; |
mbed_official | 0:aaf5a9d465fd | 26 | } |
mbed_official | 0:aaf5a9d465fd | 27 | wait(0.25); |
mbed_official | 0:aaf5a9d465fd | 28 | } |
mbed_official | 0:aaf5a9d465fd | 29 | } |