ARM作业 （0921-林雪阵）

#ifndef __PWM_H__
#define __PWM_H__

#include "stm32mp1xx_rcc.h"
#include "stm32mp1xx_gpio.h"
#include "stm32mp1xx_tim.h"
#include "stm32mp1xx_exti.h"
#include "stm32mp1xx_gic.h"

void pwm_init();
void pwm_close();
void pwm_open();

void motor_init();
void motor_close();
void fan_init();
void fan_close();


void gpio_init();
void pf9_gicd_init();
void pf9_dicc_init();
void pf9_exti_init();





#endif

.C

#include "pwm.h"


extern void printf(const char *fmt, ...);
extern void delay_ms(int ms);
void do_irq(void)
{
	// 1. 获取中断号   GICC_IAR[9:0]
	unsigned int irq_num;
	irq_num = GICC->IAR & 0x3FF;
	// 2. 进入到中断处理程序
	switch (irq_num)
	{

	case 97: // KEY2
		delay_ms(500);
		if(TIM4->CCER & (0x1))
		{
			pwm_close();
		}else
		{
			pwm_open();				
		}
		printf("key2######\n");
		//清除EXTI层挂起标志位
		EXTI->FPR1 |= (0x1 <<7);
		EXTI->FPR1 |= (0x1 <<8);
		EXTI->FPR1 |= (0x1 <<9);

		//清除GICD层挂起标志位
		GICD->ICPENDR[3] |= (0X1 <<3);
		GICD->ICPENDR[3] |= (0X1 <<1);
		GICD->ICPENDR[3] |= (0X1 <<2);



		break;
	case 98: // KEY3
		delay_ms(500);
		if(TIM4->CCER & (0x1))
		{
			motor_close();
		}else
		{
			motor_init();				
		}
		printf("key3######\n");

		//清除EXTI层挂起标志位
		EXTI->FPR1 |= (0x1 <<7);
		EXTI->FPR1 |= (0x1 <<8);
		EXTI->FPR1 |= (0x1 <<9);

		//清除GICD层挂起标志位
		GICD->ICPENDR[3] |= (0X1 <<3);
		GICD->ICPENDR[3] |= (0X1 <<1);
		GICD->ICPENDR[3] |= (0X1 <<2);
		break;
	case 99: // KEY1
		delay_ms(500);
		if(TIM4->CCER & (0x1))
		{
			fan_close();
		}else
		{
			fan_init();				
		}
		printf("key1######\n");

		//清除EXTI层挂起标志位
		EXTI->FPR1 |= (0x1 <<7);
		EXTI->FPR1 |= (0x1 <<8);
		EXTI->FPR1 |= (0x1 <<9);

		//清除GICD层挂起标志位
		GICD->ICPENDR[3] |= (0X1 <<3);
		GICD->ICPENDR[3] |= (0X1 <<1);
		GICD->ICPENDR[3] |= (0X1 <<2);
		break;

	}
	// 6. 清除GICC层的中断号  GICC_EOIR
	GICC->EOIR = irq_num;
}

.C

#include "pwm.h"

void pwm_init()
{
	//使能GPIOB,tim4
	RCC->MP_AHB4ENSETR |= (0x1<<1);
	RCC->MP_APB1ENSETR |= (0X1<<2);

	//配置GPIOB
	GPIOB->MODER &= (~(0X3 <<12));
	GPIOB->MODER |= (0x1 <<13);

	GPIOB->AFRL &= (~(0XF <<24));
	GPIOB->AFRL |= (0x1 <<25);

	//配置TIM4
	TIM4->CR1 |= (0X1 <<7);
	TIM4->CR1 &= (~(0X3 <<5));
	TIM4->CR1 |= (0X1 <<0);
	TIM4->CR1 |= (0X1 <<4);

	TIM4->CCMR1 &= (~(0X1 <<16));
	TIM4->CCMR1 &= (~(0X7 <<4));
	TIM4->CCMR1 |= (0X3 <<5);
	TIM4->CCMR1 |= (0X1 <<3);
	TIM4->CCMR1 &= (~(0X3 <<0));


	TIM4->CCER &= (~(0X1 <<1));
	TIM4->CCER &= (~(0X1 <<3));

	TIM4->PSC = 208;

	TIM4->ARR &= (~(0XFFFF));
	TIM4->ARR |= (0X3E8);

	TIM4->CCR1 &= (~(0XFFFF));
	TIM4->CCR1 |=(0X12C);
}
void pwm_open()
{
	
	TIM4->CCER |= (0X1<<0);
}
void pwm_close()
{
	TIM4->CCER &= (~(0X1));
}

void motor_init()
{
	//使能GPIOF,tim16
	RCC->MP_AHB4ENSETR |= (0x1<<5);
	RCC->MP_APB2ENSETR |= (0X1<<3);

	//配置GPIOF
	GPIOF->MODER &= (~(0X3 <<12));
	GPIOF->MODER |= (0x1 <<13);

	GPIOF->AFRL &= (~(0XF <<24));
	GPIOF->AFRL |= (0x1 <<24);

	//配置TIM16
	//1.设置分频
	//2.PWM分波
	//3.分波比
	TIM16->PSC = 208;
	TIM16->ARR &= (~(0XFFFF));
	TIM16->ARR |= (0X3E8);
	TIM16->CCR1 &= (~(0XFFFF));
	TIM16->CCR1 |=(0X12C);

	//4.设置为PWM1模式
	TIM16->CCMR1 &= (~(0X1 <<16));
	TIM16->CCMR1 &= (~(0X7 <<4));
	TIM16->CCMR1 |= (0X3 <<5);
	//5.预加载
	TIM16->CCMR1 |= (0X1 <<3);
	//6.输出模式
	TIM16->CCMR1 &= (~(0X3 <<0));

	//7.输出极高电平
	//8.比较捕获寄存器输出使能		
	TIM16->CCER &= (~(0X1 <<1));
	TIM16->CCER &= (~(0X1 <<3));
	TIM16->CCER |= (0X1<<0);

	//9.自动重载寄存器预加载使能
	//10.采用边沿对期
	//11.采用递减计数
	//12.设置计数器使能
	TIM16->CR1 |= (0X1 <<7);
	TIM16->CR1 |= (0X1 <<0);

	TIM16->BDTR |= (0X1 <<15);
}
void motor_close()
{
	
	TIM16->CCER &= (~(0X1<<0));
}
void fan_init()
{
	//使能GPIOE,tim1
	RCC->MP_AHB4ENSETR |= (0x1<<4);
	RCC->MP_APB2ENSETR |= (0X1<<0);

	//配置GPIOE
	GPIOF->MODER &= (~(0X3 <<18));
	GPIOF->MODER |= (0x1 <<19);

	GPIOF->AFRH &= (~(0XF <<4));
	GPIOF->AFRH |= (0x1 <<4);

	//配置TIM1
	//1.设置分频
	//2.PWM分波
	//3.分波比
	TIM1->PSC = 208;
	TIM1->ARR = 500;
	TIM1->CCR1 = 300;

	//4.设置为PWM1模式
	TIM1->CCMR1 &= (~(0X1 <<16));
	TIM1->CCMR1 &= (~(0X7 <<4));
	TIM1->CCMR1 |= (0X3 <<5);
	//5.预加载
	TIM1->CCMR1 |= (0X1 <<3);
	//6.输出模式
	TIM1->CCMR1 &= (~(0X3 <<0));

	//7.输出极高电平
	//8.比较捕获寄存器输出使能		
	TIM1->CCER &= (~(0X1 <<1));
	TIM1->CCER |= (0X1 <<3);
	TIM1->CCER |= (0X1<<0);

	//9.自动重载寄存器预加载使能
	//10.采用边沿对期
	//11.采用递减计数
	//12.设置计数器使能

	TIM1->BDTR |= (0X1 <<15);

	TIM1->CR1 |= (0X1 <<7);
	TIM1->CR1 &= (~(0X3 <<5));
	TIM1->CR1 |= (0X1 <<0);
	TIM1->CR1 |= (0X1 <<4);

}
void fan_close()
{
	
	TIM1->CCER &= (~(0X1<<0));
}

void gpio_init()
{
	RCC->MP_AHB4ENSETR |= (0X1 <<5);
	GPIOF->MODER &= (~(0X3 <<18));
	GPIOF->MODER &= (~(0X3 <<16));
	GPIOF->MODER &= (~(0X3 <<14));
}
//初始化EITI层
void pf9_exti_init()
{
	/****设置EXTI系列寄存器*****/

	//1.中断寄存器与GPIO连接
	EXTI->EXTICR3 &= (~(0xff << 8));
	EXTI->EXTICR3 |= (0X05 << 8);
	EXTI->EXTICR3 &= (~(0xff << 0));
	EXTI->EXTICR3 |= (0X05 << 0);
	EXTI->EXTICR2 &= (~(0xff << 24));
	EXTI->EXTICR2 |= (0X05 << 24);
	
	//2.检测事件为下降沿
	EXTI->FTSR1 |= (0X1 <<7);
	EXTI->FTSR1 |= (0X1 <<8);
	EXTI->FTSR1 |= (0X1 <<9);

	//3.设置中断屏蔽寄存器为不屏蔽
	EXTI->C1IMR1 |= (0X1 <<7);
	EXTI->C1IMR1 |= (0X1 <<8);
	EXTI->C1IMR1 |= (0X1 <<9);

}
//初始化GICD层
void pf9_gicd_init()
{

	/*****设置GICD系列寄存器*****/
	//使能GICD(全局）
	GICD->CTRL |= (0X1 <<0);
	//中断设置使能（对应中断号）
	GICD->ISENABLER[3] |= (0X1 <<3);
	GICD->ISENABLER[3] |= (0X1 <<1);
	GICD->ISENABLER[3] |= (0X1 <<2);
	//中断优先级设置
	GICD->IPRIORITYR[24] &= (~(0X1F <<11));
	GICD->IPRIORITYR[24] |= (0X1 <<11);
	GICD->IPRIORITYR[24] &= (~(0X1F <<19));
	GICD->IPRIORITYR[24] |= (0X1 <<19);
	GICD->IPRIORITYR[24] &= (~(0X1F <<27));
	GICD->IPRIORITYR[24] |= (0X1 <<27);
	//选择CPU,0号，设置中断目标分配
	GICD->ITARGETSR[24] &= (~(0X3 <<8));
	GICD->ITARGETSR[24] |= (0X1 <<8);
	GICD->ITARGETSR[24] &= (~(0X3 <<16));
	GICD->ITARGETSR[24] |= (0X1 <<16);
	GICD->ITARGETSR[24] &= (~(0X3 <<24));
	GICD->ITARGETSR[24] |= (0X1 <<24);


}

//初始化GICC层
void pf9_dicc_init()
{

	/*****设置GICC系列寄存器*****/

	//使能GICC
	GICC->CTRL |= (0X1 <<0);
	//输入中断优先级
	GICC->PMR &= (~(0X1F <<3));
	GICC->PMR |= (0XF <<3);
}

main.c

#include "./include/pwm.h"



extern void printf(const char *fmt, ...);

void delay_ms(unsigned int ms)

{

	int i, j;

	for (i = 0; i < ms; i++)

		for (j = 0; j < 1800; j++)

			;

}





int main()

{

	gpio_init();

	pwm_init();

	pf9_gicd_init();

	pf9_dicc_init();

	pf9_exti_init();

	while (1)

	{



	}

	return 0;

}