#include "stm32f10x.h"
#include "gpio.h"

int main ( void )
{
	RCC->APB2ENR |= (0x01 << 2) | (0x01 << 3) | (0x01 << 4) ;
	
	GPIOC->CRH=GPIOC->CRH&~(0xF<<((9-8)*4));
	GPIOC->CRH|=0x4<<((9-8)*4);//PC9 en floating input
	
	GPIOC->CRH=GPIOC->CRH&~(0xF<<((8-8)*4));
	GPIOC->CRH|=0x2<<((8-8)*4);//PC8 en pull-up 2MHz

	while (1)
	{
		//GPIOC->ODR<<8 = GPIOC->IDR<<9;
		//GPIOC->IDR<<9=(GPIOC->ODR<<8 & 0x1);
		if (GPIOC->IDR&(0x1<<9==0x01)){
		GPIOC->ODR|=0x01<<7;
		}
	}
}