#include "stm32f4xx.h"
#include "stm32f4_discovery.h"

GPIO_InitTypeDef GPIO_InitLed;
EXTI_InitTypeDef EXTI_InitSensor;
NVIC_InitTypeDef NVIC_InitSensor;

void Delay(__IO uint32_t nCount)

{
	while(nCount--)
	{

	}
}

int main(void)
{
	RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOD, ENABLE);
	RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);

    RCC_AHB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);

	GPIO_InitLed.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1;
	GPIO_InitLed.GPIO_Mode = GPIO_Mode_OUT;
	GPIO_InitLed.GPIO_OType = GPIO_OType_PP;
	GPIO_InitLed.GPIO_PuPd = GPIO_PuPd_NOPULL;
	GPIO_InitLed.GPIO_Speed = GPIO_Speed_50MHz;
        GPIO_Init(GPIOD, &GPIO_InitLed);

	GPIO_InitLed.GPIO_Pin = GPIO_Pin_1;
	GPIO_InitLed.GPIO_Mode = GPIO_Mode_IN;
	GPIO_InitLed.GPIO_Mode = GPIO_OType_PP;
	GPIO_InitLed.GPIO_PuPd = GPIO_PuPd_DOWN;
	GPIO_InitLed.GPIO_Speed = GPIO_Speed_50MHz;
	GPIO_Init(GPIOA, &GPIO_InitLed);


	SYSCFG_EXTILineConfig(EXTI_PortSourceGPIOA, EXTI_PinSource1);

	EXTI_InitSensor.EXTI_Line = EXTI_Line1;
	EXTI_InitSensor.EXTI_Mode = EXTI_Mode_Interrupt;
	EXTI_InitSensor.EXTI_Trigger = EXTI_Trigger_Rising;
	EXTI_InitSensor.EXTI_LineCmd = ENABLE;
	EXTI_Init(&EXTI_InitSensor);

	NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);

	NVIC_InitSensor.NVIC_IRQChannel = EXTI1_IRQn;
	NVIC_InitSensor.NVIC_IRQChannelPreemptionPriority = 0;
	NVIC_InitSensor.NVIC_IRQChannelSubPriority = 0;
	NVIC_InitSensor.NVIC_IRQChannelCmd = ENABLE;
	NVIC_Init(&NVIC_InitSensor);

	while (1)
  {
	GPIO_WriteBit(GPIOD, GPIO_Pin_0, Bit_SET);
	Delay(16800000);
	GPIO_WriteBit(GPIOD, GPIO_Pin_0, Bit_RESET);
	Delay(16800000);
  }
}
void EXTI1_PIRQHandler(void)
{
	if(EXTI_GetPIRStatus(EXTI_Line1) != RESET)
	{
		GPIO_WriteBit(GPIOD, GPIO_Pin_1, Bit_SET);
		Delay(33600000);
		GPIO_WriteBit(GPIOD, GPIO_Pin_1, Bit_RESET);
		EXTI_ClearPIRPendingBit(EXTI_Line1);
     }

}