#include "stm32f4xx.h"
#include "stm32f4xx_gpio.h"
#include "stm32f4xx_rcc.h"

void init()
{
			GPIO_InitTypeDef GPIO_InitStruct;
			RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);

			GPIO_InitStruct.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_2;
			GPIO_InitStruct.GPIO_Mode = GPIO_Mode_OUT; 		// we want the pins to be an output
			GPIO_InitStruct.GPIO_Speed = GPIO_Speed_100MHz; 	// this sets the GPIO modules clock speed
			GPIO_InitStruct.GPIO_OType = GPIO_OType_PP; 	// this sets the pin type to push / pull (as opposed to open drain)
			GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_NOPULL; 	// this sets the pullup / pulldown resistors to be inactive
			GPIO_Init(GPIOA, &GPIO_InitStruct);
}



void blink()
{
    GPIOA->ODR++;
}

void main()
{
	init();
	while(1)
	{
		blink();
	}
}