#ifndef __KEY_H__
#define __KEY_H__

#include "stm32mp1xx_rcc.h"
#include "stm32mp1xx_gpio.h"
#include "stm32mp1xx_exti.h"
#include "stm32mp1xx_gic.h"

//对RCC/GPIO/EXTI章节的初始化
void hal_key1_exti_init();

//对GIC的初始化
void hal_key1_gic_init();

#endif



#include "key.h"
extern void printf(const char *fmt, ...);

void do_irq(void) 
{
	unsigned int num;
	num = GICC->IAR & 0x3ff;
	switch (num)
	{
	case 99:
		printf("key1 press#####\n");
		//1.消除EXTI层中断挂起标志位
		EXTI->FPR1 |= (0x1 << 9);
		//2.消除GICD层的中断挂起标志位
		GICD->ICPENDR[3] |= (0x1 << 3);
		break;
	case 98:
		break;
	case 97:
		break;
	}
	//3.清除获取到的中断号
	GICC->EOIR |= num;
}


#include "key.h"

//对RCC/GPIO/EXTI章节的初始化
void hal_key1_exti_init()
{
	//RCC
	RCC->MP_AHB4ENSETR |= (0x1 << 5);
	//GPIO设置输入模式
	GPIOF->MODER &= (~(0x3 << 18));
	//EXTI
	//1.外部中断选择寄存器,选择与哪个EXTI(16)链接
	EXTI->EXTICR3 &= (~(0xff << 8));
	EXTI->EXTICR3 |= (0x5 << 8);
	//2.设置中断下降沿触发方式
	EXTI->FTSR1 |= (0x1 << 9);
	//3.中断屏蔽选择寄存器
	EXTI->C1IMR1 |= (0b01 << 9);
	
	
	
}

//对GIC的初始化
void hal_key1_gic_init()
{
	//GICD的初始化
	//1.使能GICD层控制器
	GICD->CTLR |= 0x1;
	//2.设置GICD层的中断使能
	GICD->ISENABLER[3] |= (0x1 << 3);
	//3.设置GICD层中断优先级
	GICD->IPRIORITYR[24] &= (~(0x1F << 27));
	//4.设置GICD层中断目标分配寄存器
	GICD->ITARGETSR[24] |= (0x1 << 24);

	//GICC章节初始化
	//1.使能GICC层控制器
	GICC->CTLR |= 0x1;
	//2.设置GICC层中断优先级
	GICC->PMR |= (0x1 << 3);
}