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

Program Name    : ex7_led_count
Author          : Grant Phillips
Date Modified   : 12/01/2016
Compiler        : ARMmbed
Tested On       : STM32F4-Discovery

Description     : Increments a counter from 0 to 255 repeatedly
                  in 200ms delays and display the count value
                  on 8 LEDs    

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() {
    uint8_t count=0;
    
    while(1) {
        myleds = count;         //display count on LEDs
        count = count + 1;      //increment count; because count is a 8-bit unsigned value, the count will "roll-over" from 255 back to 0 again
        wait(0.2);              //wait 200ms   
    }
}