#include "stm32l0xx.c"
#include <stdio.h>
// Where is the led is connected
// Port:A
// Pin:PA5
#define GPIOAEN						        (1U<<0)
#define PIN5 						          (1UL<<5)
#define LED_PIN					        	PIN5
void setup() 
{
  RCC->IOPENR=GPIOAEN	;
  GPIOA->MODER |=(1<<10);
  GPIOA->MODER &=~(1<<11);
	while(1)
	{
      GPIOA->ODR ^=LED_PIN;
		for(long i=0;i<1000000;i++);
  }
}

void loop() 
{

}