#include "stm32f4xx.h"
#include "LED.h"
void EXTILine0_Config(void);
/************************************************************/
void EXTI0_IRQHandler(void){
	if(EXTI_GetITStatus(EXTI_Line0) != RESET){
		/* Toggle LED4 */
		LED_TGL(LED4);
		/* Clear the EXTI line 0 pending bit */
		EXTI_ClearITPendingBit(EXTI_Line0);
	}
}
/************************************************************/
int main(void){
	LED_Init();
	EXTILine0_Config();
	EXTI_GenerateSWInterrupt(EXTI_Line0);
	while (1){
	}
}
/************************************************************/
void EXTILine0_Config(void){
	
	GPIO_InitTypeDef   GPIO_InitStructure;
	NVIC_InitTypeDef   NVIC_InitStructure;
	EXTI_InitTypeDef   EXTI_InitStructure;
	
	/* Enable GPIOA clock */
	RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);
	/* Enable SYSCFG clock */
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);
	
	/* Configure PA0 pin as input floating */
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
	GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
	GPIO_Init(GPIOA, &GPIO_InitStructure);
	
	/* Connect EXTI Line0 to PA0 pin */
	SYSCFG_EXTILineConfig(EXTI_PortSourceGPIOA, EXTI_PinSource0);
	
	/* Configure EXTI Line0 */
	EXTI_InitStructure.EXTI_Line = EXTI_Line0;
	EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
	EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;  
	EXTI_InitStructure.EXTI_LineCmd = ENABLE;
	EXTI_Init(&EXTI_InitStructure);
	
	/* Enable and set EXTI Line0 Interrupt to the lowest priority */
	NVIC_InitStructure.NVIC_IRQChannel = EXTI0_IRQn;
	NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x01;
	NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x01;
	NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
	NVIC_Init(&NVIC_InitStructure);
}