Page 116 - ARM Based Microcontroller Projects Using MBED

102 7. USING THE Mbed WITH SIMPLE PROJECTS

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

RANDOMLY FLASHING LEDs
======================
In this version of teh program the delay between the outputs
is random and varies between 0 and 300ms.

Author: Dogan Ibrahim
Date : August 2018
File : Christmas-2
*************************************************************/
#include "mbed.h"
BusOut LEDS(PC_0,PC_1,PC_2,PC_3,PC_4,PC_5,PC_6,PC_7);

int main()
{
int Number, Tim;
float Del;

while(1)
{
Number = rand() % 256; // Random number 0-255
Tim = rand() % 11; // Random number 0 - 10
Del = Tim *0.03; // Random delay 0-300ms
LEDS = Number; // Turn ON LEDs
wait(Del); // Random delay
}
}

FIG. 7.37 Modified program.

7.10 PROJECT 7—LED CONTROL WITH PUSH-BUTTON

7.10.1 Description

In this project the user push-button and the user LED on the Nucleo-F411RE development
board are used. The LED flashes 3 times when the button is pressed.

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