#include "stm32l0xx.c"
#include <stdio.h>
// Where is the led is connected
// Port:A
// Pin:PA5
// Where is the PUSH BTN is connected
// Port:C
// Pin:PC13
#define GPIOAEN		(1U<<0)
#define GPIOCEN		(1U<<0)
#define PIN5 		(1U<<5)
#define LED_PIN		PIN5
#define PIN6 		(1U<<6)
#define BTN_PIN		PIN6
void setup() 
{
  RCC->IOPENR=GPIOAEN	;
	GPIOA->MODER |=(1<<10);
	GPIOA->MODER &=~(1<<11);

	GPIOA->MODER &=~(1<<12);
	GPIOA->MODER &=~(1<<13);
  GPIOA->PUPDR &=~(1<<13);
	GPIOA->PUPDR |=(1<<12);

	while(1)

	{
		if((GPIOA->IDR & BTN_PIN) )
		{
			GPIOA->BSRR=LED_PIN;
		}
		else
		{
			GPIOA->BSRR=(1<<21);
		}


	 }
}

void loop() 
{

}