Page 118 - ARM Based Microcontroller Projects Using MBED

104 7. USING THE Mbed WITH SIMPLE PROJECTS

/*********************************************************************

PUSH BUTTON WITH LED
====================
In this program teh user Button (BUTTON1) and the User LED (LED1)
are used. When the button is pressed the LED flashed 3 times with
one second delay between each output.
Author: Dogan Ibrahim
Date : August 2018
File : Push
**********************************************************************/
#include "mbed.h"
DigitalOut led(LED1); // LED1 isoutput
DigitalIn button(BUTTON1); // BUTTON1 is input

int main()
{
while(1) // DO forever
{
if(button == 0) // If button is pressed
{
for(int k = 0; k < 3; k++) // Do 3 times
{
led = 1; // LED ON
wait(1.0); // Wait 1 second
led = 0; // LED OFF
wait(1.0); // Wait 1 second
}
}
}
}

FIG. 7.40 Program listing.

7.11 PROJECT 8—CHANGING LED FLASHING RATE

7.11.1 Description
In this project the user push-button and the user LED on the Nucleo-F411RE development
board are used. The LED flashing rate is changed every time the button is pressed. This is
done by changing the delay between the flashes.

7.11.2 Aim

The aim of this project is to show how the user push-button on the Nucleo board can
be used.