#include "stm32f4xx.h"
unsigned int buftime;
unsigned int waittime;
int delay;
int check;
float timer;
void SystemInit() {
	//enable clocking
	RCC->AHB1ENR|= 0x00000008;   //for Port D (RCC_AHB1ENR) led

	RCC->AHB1ENR|= 0x00000001;   //for Port A (RCC_AHB1ENR) Button

	//setup direction for PD12 (GPIOx_MODER)
	GPIOD->MODER|= 0x55000000;   // output of port D
	GPIOA->MODER|= 0x00000000;   // input of port A pin 0


}
 int wait(unsigned int ms);   // just delay
 //#define  delay   your_number_of_ms
unsigned long GlobalTime;
#define MAXGLOBALTIME 0x10000000

void Input()
{
	int inp=0;
	while (1)
	{
		if (inp==0)
		{
			buftime=2000000;
			waittime=2000000;
			delay=100;
			check=0;
			return;
		}
	}
}
void Output()
{
	return;
}
void GreatWork()
{
	if (( GPIOA->IDR & 0x00000001) == 0)
		{
			if (check==1)
			{
				waittime=buftime;
				check=0;
				buftime=400000;
			}

			GPIOD->ODR|= 0x00003000;
			wait(waittime*(delay/100));
			GPIOD->ODR &= ~0x00003000;
			wait(waittime);
			GPIOD->ODR|= 0x0000C000;
			wait(waittime*(delay/100));
			GPIOD->ODR &= ~0x0000C000;
			wait(waittime);
		}
		if (( GPIOA->IDR & 0x00000001) == 1)
		{
			check=1;
			buftime=buftime+100000;

			GPIOD->ODR|= 0x00003000;
			wait(waittime);
			GPIOD->ODR &= ~0x00003000;
			wait(waittime*(delay/100));
			GPIOD->ODR|= 0x0000C000;
			wait(waittime);
			GPIOD->ODR &= ~0x0000C000;
			wait(waittime*(delay/100));
		}
}




int main () {

  while (1)
	{

	}
}

void * const Tasks[ ] __attribute__((at(0x08001000))) = {
Input,
Output,
GreatWork,
0
};