Toggle led ON pin PA_5 (LED1) when the button on pin PB_4 is released
Dependencies: Hotboards_buttons mbed
main.cpp@0:8bf973b68f0b, 2016-03-03 (annotated)
- Committer:
- Hotboards
- Date:
- Thu Mar 03 21:42:08 2016 +0000
- Revision:
- 0:8bf973b68f0b
first release
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
Hotboards | 0:8bf973b68f0b | 1 | |
Hotboards | 0:8bf973b68f0b | 2 | /* |
Hotboards | 0:8bf973b68f0b | 3 | * Toggle led ON pin PA_5 (LED1) when the button on pin PB_4 is released |
Hotboards | 0:8bf973b68f0b | 4 | */ |
Hotboards | 0:8bf973b68f0b | 5 | |
Hotboards | 0:8bf973b68f0b | 6 | #include "mbed.h" |
Hotboards | 0:8bf973b68f0b | 7 | #include "Hotboards_buttons.h" |
Hotboards | 0:8bf973b68f0b | 8 | |
Hotboards | 0:8bf973b68f0b | 9 | //Creates a single button object, when the button is pressed it gives you |
Hotboards | 0:8bf973b68f0b | 10 | //a LOW(0) value because it works with pull-ups. |
Hotboards | 0:8bf973b68f0b | 11 | Hotboards_buttons btn( PB_4 ); |
Hotboards | 0:8bf973b68f0b | 12 | //If your buttons gives you a HIGH(1) value when is pressed, then we need |
Hotboards | 0:8bf973b68f0b | 13 | //to create the button object with and extra parameter: |
Hotboards | 0:8bf973b68f0b | 14 | //Hotboards_buttons btn( PB_4 , 1 ); in any case the functions will return |
Hotboards | 0:8bf973b68f0b | 15 | //a HIGH(1) value any time the button is pressed |
Hotboards | 0:8bf973b68f0b | 16 | |
Hotboards | 0:8bf973b68f0b | 17 | //To our example we will use the led on the nucleo board |
Hotboards | 0:8bf973b68f0b | 18 | DigitalOut nucleoLed( LED1 ); |
Hotboards | 0:8bf973b68f0b | 19 | |
Hotboards | 0:8bf973b68f0b | 20 | int main() |
Hotboards | 0:8bf973b68f0b | 21 | { |
Hotboards | 0:8bf973b68f0b | 22 | while(1) |
Hotboards | 0:8bf973b68f0b | 23 | { |
Hotboards | 0:8bf973b68f0b | 24 | //The moment when the button is released the function will return a HIGH(1) |
Hotboards | 0:8bf973b68f0b | 25 | //value, it doesn`t matter if your button is configured with pull-ups(LOW) |
Hotboards | 0:8bf973b68f0b | 26 | //or pull-downs(HIGH) |
Hotboards | 0:8bf973b68f0b | 27 | if( btn.isReleased( ) ) |
Hotboards | 0:8bf973b68f0b | 28 | { |
Hotboards | 0:8bf973b68f0b | 29 | //Toggle led on the nucleo board |
Hotboards | 0:8bf973b68f0b | 30 | nucleoLed = !nucleoLed; |
Hotboards | 0:8bf973b68f0b | 31 | } |
Hotboards | 0:8bf973b68f0b | 32 | } |
Hotboards | 0:8bf973b68f0b | 33 | } |