main.c

#include "pwm.h"
extern void printf(const char *fmt, ...);
void delay_ms(int ms)
{
	int i,j;
	for(i = 0; i < ms;i++)
		for (j = 0; j < 1800; j++);
}
int main()
{
	//蜂鸣器初始化
	hal_pwm_beep_init1();
	//马达
	 hal_pwm_motor_init1();
	//风扇
	 hal_pwm_blower_init1();
	while(1)
	{
	
	}
	return 0;
}

pwm.h

#ifndef __PWM_H__
#define __PWM_H__
#include "stm32mp1xx_gpio.h"
#include "stm32mp1xx_tim.h"
#include "stm32mp1xx_rcc.h"
//pwm方波
//蜂鸣器初始化
void hal_pwm_beep_init();
//马达
void hal_pwm_motor_init();
//风扇
void hal_pwm_blower_init();
//普通输出模式
//蜂鸣器初始化
void hal_pwm_beep_init1();
//马达
void hal_pwm_motor_init1();
//风扇
void hal_pwm_blower_init1();
#endif

pwm.c

#include"pwm.h"
//蜂鸣器初始化
void hal_pwm_beep_init(){
		//RCC初始化 PB6 使能ahb4 和apb1总线
		RCC->MP_AHB4ENSETR |= (0x1 << 1);
		RCC->MP_APB1ENSETR |= (0x1 << 2);
		//GPIO初始化
		//设置PE6引脚为复用模式 mode[13:12] 10
		GPIOB->MODER &=(~(0x3 << 12));
		GPIOB->MODER |= (0x1 <<13);
		//设置复用功能为TIM4 为AF2  [27:24] 0010
		GPIOB->AFRL &= (~(0xf << 24));
		GPIOB->AFRL |= (0x1 << 25);
		//TIM4初始化 
		TIM4->CR1 &=(~((0xf << 4)+0x1));
		TIM4->CR1 |=(0x1 << 7);
		TIM4->CR1 |=(0x1 << 4);
		TIM4->CR1 |=(0x1);
		//PWM方波频率为1000HZ
		//系统提供的时钟源为209MHZ
		//设置分频值 系统会自动加1
		TIM4->PSC =209-1;
		//设置自动重载计数器的值
		TIM4->ARR = 1000;
		//设置递减
		TIM4->CCR1 = 300;
		//设置输出捕获模式
		TIM4->CCMR1 &=(~(0x3));
		TIM4->CCMR1 &=(~(0X1 << 16));
		TIM4->CCMR1 &=(~(0X7 << 4));
		TIM4->CCMR1 |=(0x6 << 4);
		TIM4->CCMR1 |=(0x1 << 3);

		//设置捕获、比较寄存器
		TIM4->CCER |=(0x3);
		TIM4->CCER |=(~(0x1 << 3));

}
//马达
void hal_pwm_motor_init(){
		//RCC初始化 PF6 使能ahb4 和apb1总线
		RCC->MP_AHB4ENSETR |= (0x1 << 5);
		RCC->MP_APB2ENSETR |= (0x1 << 3);
		//GPIO初始化
		//设置PF6引脚为复用模式 mode[13:12] 10
		GPIOF->MODER &=(~(0x3 << 12));
		GPIOF->MODER |= (0x1 <<13);
		//设置复用功能为TIM4 为AF1  [27:24] 0001
		GPIOF->AFRL &= (~(0xf << 24));
		GPIOF->AFRL |= (0x1 << 24);
		//TIM4初始化 
		TIM16->CR1 &=(~((0xf << 4)+0x1));
		TIM16->CR1 |=(0x1 << 7);
		TIM16->CR1 |=(0x1 << 4);
		TIM16->CR1 |=(0x1);
		//PWM方波频率为1000HZ
		//系统提供的时钟源为209MHZ
		//设置分频值 系统会自动加1
		TIM16->PSC =209-1;
		//设置自动重载计数器的值
		TIM16->ARR = 1000;
		//设置递减
		TIM16->CCR1 = 300;
		//设置输出捕获模式
		TIM16->CCMR1 &=(~(0x3));
		TIM16->CCMR1 &=(~(0X1 << 16));
		TIM16->CCMR1 &=(~(0X7 << 4));
		TIM16->CCMR1 |=(0x6 << 4);
		TIM16->CCMR1 |=(0x1 << 3);

		//设置捕获、比较寄存器
		TIM16->CCER |=(0x3);
		TIM16->CCER |=(~(0x1 << 3));
		TIM16->BDTR |=(0x1 <<15);

}
//风扇
void hal_pwm_blower_init(){
	//RCC初始化 PE9 使能ahb4 和apb1总线
		RCC->MP_AHB4ENSETR |= (0x1 << 4);
		RCC->MP_APB2ENSETR |= (0x1);
	//GPIO初始化
		//设置PE9引脚为复用模式 mode[13:12] 10
		GPIOE->MODER &=(~(0x3 << 18));
		GPIOE->MODER |= (0x1 <<19);
	//设置复用功能为TIM4 为AF1  [7:4] 0001
		GPIOE->AFRH &= (~(0xf << 4));
		GPIOE->AFRH |= (0x1 << 4);
		//TIM4初始化 
		TIM1->CR1 &=(~((0xf << 4)+0x1));
		TIM1->CR1 |=(0x1 << 7);
		TIM1->CR1 |=(0x1 << 4);
		TIM1->CR1 |=(0x1);
		//PWM方波频率为1000HZ
		//系统提供的时钟源为209MHZ
		//设置分频值 系统会自动加1
		TIM1->PSC =209-1;
		//设置自动重载计数器的值
		TIM1->ARR = 1000;
		//设置递减
		TIM1->CCR1 = 300;
		//设置输出捕获模式
		TIM1->CCMR1 &=(~(0x3));
		TIM1->CCMR1 &=(~(0X1 << 16));
		TIM1->CCMR1 &=(~(0X7 << 4));
		TIM1->CCMR1 |=(0x6 << 4);
		TIM1->CCMR1 |=(0x1 << 3);

		//设置捕获、比较寄存器
		TIM1->CCER |=(0x3);
		TIM1->CCER |=(~(0x1 << 3));
		TIM1->BDTR |=(0x1 <<15);

}





//蜂鸣器初始化
void hal_pwm_beep_init1(){
		//RCC初始化 PB6 使能ahb4 
		RCC->MP_AHB4ENSETR |= (0x1 << 1);
		//GPIO初始化
		//设置PE6引脚为复用模式 mode[13:12] 10
		GPIOB->MODER &=(~(0x3 << 12));
		GPIOB->MODER |= (0x1 <<12);
		GPIOB->OTYPER &=(~(0x1 << 6));
		GPIOB->OSPEEDR &=(~(0x1 << 13));
		GPIOB->OSPEEDR |=(0x1 <<12);
		GPIOB->PUPDR &=(~(0x3 <<12));
		GPIOB->ODR |=(0x1 << 6);
}
//马达
void hal_pwm_motor_init1(){
		//RCC初始化 PF6 使能ahb4 
		RCC->MP_AHB4ENSETR |= (0x1 << 5);
		//GPIO初始化
		//设置PF6引脚为复用模式 mode[13:12] 10
		GPIOF->MODER &=(~(0x3 << 12));
		GPIOF->MODER |= (0x1 <<12);

		GPIOF->OTYPER &=(~(0x1 << 6));
		GPIOF->OSPEEDR &=(~(0x1 << 13));
		GPIOF->OSPEEDR |=(0x1 <<13);
		GPIOF->PUPDR &=(~(0x3 <<12));
		GPIOF->ODR |=(0x1 << 6);

}
//风扇
void hal_pwm_blower_init1(){
	//RCC初始化 PE9 使能ahb4
		RCC->MP_AHB4ENSETR |= (0x1 << 4);
	//GPIO初始化
		//设置PE9引脚为复用模式 mode[13:12] 10
		GPIOE->MODER &=(~(0x3 << 18));
		GPIOE->MODER |= (0x1 <<18);
		GPIOE->OTYPER &=(~(0x1 << 9));
		GPIOE->OSPEEDR &=(~(0x1 << 18));
		GPIOE->OSPEEDR |=(0x1 <<19);
		GPIOE->PUPDR &=(~(0x3 <<18));
		GPIOE->ODR |=(0x1 << 9);

}