Hotboards MX / Mbed 2 deprecated Hotboards_button_status

The simplest program, read a single button on pin PB_4

Dependencies:   Hotboards_buttons mbed

main.cpp@0:61fb1e77eaee, 2016-03-03 (annotated)

Committer:
Hotboards
Date:
Thu Mar 03 19:50:53 2016 +0000
Revision:
0:61fb1e77eaee
first release

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Hotboards 0:61fb1e77eaee 1
Hotboards 0:61fb1e77eaee 2 /*
Hotboards 0:61fb1e77eaee 3 * The simplest program, read a single button on pin PB_4
Hotboards 0:61fb1e77eaee 4 */
Hotboards 0:61fb1e77eaee 5
Hotboards 0:61fb1e77eaee 6 #include "mbed.h"
Hotboards 0:61fb1e77eaee 7 #include "Hotboards_buttons.h"
Hotboards 0:61fb1e77eaee 8
Hotboards 0:61fb1e77eaee 9 //Creates a single button object, when the button is pressed it gives you
Hotboards 0:61fb1e77eaee 10 //a LOW(0) value because it works with pull-ups.
Hotboards 0:61fb1e77eaee 11 Hotboards_buttons btn( PB_4 );
Hotboards 0:61fb1e77eaee 12 //If your buttons gives you a HIGH(1) value when is pressed, then we need
Hotboards 0:61fb1e77eaee 13 //to create the button object with and extra parameter:
Hotboards 0:61fb1e77eaee 14 //Hotboards_buttons btn( PB_4 , 1 ); in any case the functions will return
Hotboards 0:61fb1e77eaee 15 //a HIGH(1) value any time the button is pressed
Hotboards 0:61fb1e77eaee 16
Hotboards 0:61fb1e77eaee 17 //To our example we will use the led on the nucleo board
Hotboards 0:61fb1e77eaee 18 DigitalOut nucleoLed( LED1 );
Hotboards 0:61fb1e77eaee 19
Hotboards 0:61fb1e77eaee 20 int main()
Hotboards 0:61fb1e77eaee 21 {
Hotboards 0:61fb1e77eaee 22 while(1)
Hotboards 0:61fb1e77eaee 23 {
Hotboards 0:61fb1e77eaee 24 //The moment when the button is pressed the function will return a HIGH(1)
Hotboards 0:61fb1e77eaee 25 //value, it doesn`t matter if your button is configured with pull-ups(LOW)
Hotboards 0:61fb1e77eaee 26 //or pull-downs(HIGH)
Hotboards 0:61fb1e77eaee 27 if( btn.status() )
Hotboards 0:61fb1e77eaee 28 {
Hotboards 0:61fb1e77eaee 29 //Button is pressed, led on the nucleo board is ON
Hotboards 0:61fb1e77eaee 30 nucleoLed = 1;
Hotboards 0:61fb1e77eaee 31 }
Hotboards 0:61fb1e77eaee 32 else
Hotboards 0:61fb1e77eaee 33 {
Hotboards 0:61fb1e77eaee 34 //Button is not pressed, led on the nucleo board is OFF
Hotboards 0:61fb1e77eaee 35 nucleoLed = 0;
Hotboards 0:61fb1e77eaee 36 }
Hotboards 0:61fb1e77eaee 37 //Just to poll not so often
Hotboards 0:61fb1e77eaee 38 wait_ms( 50 );
Hotboards 0:61fb1e77eaee 39 }
Hotboards 0:61fb1e77eaee 40 }
Hotboards 0:61fb1e77eaee 41