/*#############################################################

Program Name    : ex2_flash_leds
Author          : Grant Phillips
Date Modified   : 12/01/2016
Compiler        : ARMmbed
Tested On       : STM32F4-Discovery

Description     : Example program that flashes 8 LEDs at a rate
                  of 250ms.     

Requirements    : * STM32F4-Discovery Board
              
Circuit         : * 8 LEDs connected to PD15 - PD8

##############################################################*/

#include "mbed.h"

BusOut myleds(PD_8, PD_9, PD_10, PD_11, PD_12, PD_13, PD_14, PD_15);
//            bit0  bit1  bit2   bit3   bit4   bit5   bit6   bit7 . . . 

int main() {
    while(1) {
        
        myleds = 0xFF;      //write 8-bit value to 8 leds.  Could also have been: myleds = 255;
        wait(0.25);           
        myleds = 0x00;      //or myleds = 0;
        wait(0.25);
        myleds = 0xF0;
        wait(0.25);
        myleds = 0x0F;      //or myleds = 15;
        wait(0.25);
    }
}