Mbed led blinking demo for STM32F3Discovery board

main.cpp

/**
 * Simple Mbed led blinking demo for STM32F3Discovery board.
 *
 * It uses leds that are attached to pins PE_8 - PE_15.
 */
#include "mbed.h"

int main()
{
    uint8_t mask = 0x01;
    PortOut leds(PortE);

    while (true) {
        leds = mask << 8;
        mask = (mask << 1) + (mask & 0x80 ? 0 : 1);
        wait_ms(50);
    }
}