/****************************************************************************
*   Copyright: (C)2014 Î人ÁèÔÆǶÈëʽʵÑéÊÒ www.emblinux.com
*      Author: GuoWenxue<guowenxue@gmail.com> QQ: 281143292
* Description: ·Ü¶·STM32v5¿ª·¢°å°´¼ü²Ù×÷º¯Êý,°´KEY1ÔòLED1ÁÁ,°´KEY2ÔòLED2ÁÁ,°´KEY3ÔòLED3ÁÁ
*
*       KEY1-PC5  KEY2-PC2  KEY3-PC3   
*       LED1-PB5  LED2-PD6  LED3-PD3
* 
*   ChangeLog:
*        °æ±¾ºÅ     ÈÕÆÚ       ×÷Õß      ˵Ã÷
*        V1.0.0  2014.08.25  GuoWenxue   ·¢²¼¸Ã°æ±¾
****************************************************************************/
#include "stm32f10x.h"
#include "stm32f10x_exti.h"
#include "stm32f10x_rcc.h"
#include "misc.h"
#include "stm32v5_led.h"
#include "stm32v5_key.h"

#define DEFINE_PIN_EXTI(group, pin, IRQn, SubPriority) \
void init_P##group##pin##_as_EXTI(void) \
{ \
	GPIO_InitTypeDef GPIO_InitStructure; \
	EXTI_InitTypeDef EXTI_InitStructure; \
	NVIC_InitTypeDef NVIC_InitStructure; \
	\
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIO##group|RCC_APB2Periph_AFIO, ENABLE); \
	\
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_##pin;	\
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU; \
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; \
  GPIO_Init(GPIO##group, &GPIO_InitStructure); \
	\
	GPIO_EXTILineConfig(GPIO_PortSourceGPIO##group, GPIO_PinSource##pin); \
  EXTI_InitStructure.EXTI_Line = EXTI_Line##pin; \
  EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt; \
  EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling; \
  EXTI_InitStructure.EXTI_LineCmd = ENABLE; \
  EXTI_Init(&EXTI_InitStructure);	\
	\
	NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1); \
  NVIC_InitStructure.NVIC_IRQChannel = IRQn;	\
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; \
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1; \
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;	\
  NVIC_Init(&NVIC_InitStructure); \
} 

/* Key1(PC5) configured as EXTI5, SubPriority as 1 */
DEFINE_PIN_EXTI(C, 5, EXTI9_5_IRQn, 1)

/* Key2(PC2) configured as EXTI2, SubPriority as 2 */
DEFINE_PIN_EXTI(C, 2, EXTI2_IRQn, 2)

/* Key3(PC3) configured as EXTI3, SubPriority as 3 */
DEFINE_PIN_EXTI(C, 3, EXTI3_IRQn, 3)

/* PC5 Key1 interrupt handler */
void EXTI9_5_IRQHandler(void)
{
	static uint8_t        led1_status = OFF;
	
	if(EXTI_GetITStatus(EXTI_Line5) != RESET)
	{
		led1_status ^= 1;	
		turn_led(LED1, led1_status);
//		EXTI_ClearITPendingBit(EXTI_Line5);
  }
}

/* PC2 Key2 interrupt handler */
void EXTI2_IRQHandler(void)
{
	static uint8_t        led2_status = OFF;
	
	if(EXTI_GetITStatus(EXTI_Line2) != RESET)
	{
		led2_status ^= 1;		
		turn_led(LED2, led2_status);
		EXTI_ClearITPendingBit(EXTI_Line2);
  }
}

/* PC3 Key3 interrupt handler */
void EXTI3_IRQHandler(void)
{
	static uint8_t        led3_status = OFF;
	
	if(EXTI_GetITStatus(EXTI_Line3) != RESET)
	{
		led3_status ^= 1;
		turn_led(LED3, led3_status);
		EXTI_ClearITPendingBit(EXTI_Line3);
  }
}

void init_keys_interrupt(void)
{
	init_PC5_as_EXTI();
	init_PC2_as_EXTI();
	init_PC3_as_EXTI();
}