STM32F103C8T6实现呼吸灯代码

PWM.h

#ifndef __PWM_H
#define __PWM_H

void PWM_Init();
void PWM_SetCompare1(uint16_t Compare);

#endif

PWM.c

#include "stm32f10x.h" // Device header

void PWM_Init()
{
    
	RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2,ENABLE);  //开启定时器2
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);//通道2时钟使能函数
	
	GPIO_InitTypeDef GPIO_InitStructure; 				//定义GPIO初始化结构体变量
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;	//设置GPIO为推挽输出模式
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;			//设置 P1 P2
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;	//速度设置为 50MHz
	GPIO_Init(GPIOA, &GPIO_InitStructure);				//按照以上参数进行 GPIO的初始化
	
	TIM_InternalClockConfig(TIM2);//TIM的时基单元由内部时钟控制
	
	TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure;
	TIM_TimeBaseInitStructure.TIM_ClockDivision = TIM_CKD_DIV1;
	TIM_TimeBaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up;
	TIM_TimeBaseInitStructure.TIM_Period = 100 - 1; //ARR 自动重装器的值
	TIM_TimeBaseInitStructure.TIM_Prescaler = 720 - 1; //PSC 预分频器的值 对72M（720000000）进行 7200分频 即10K的频率下 计10000个数 1s的时间
	TIM_TimeBaseInitStructure.TIM_RepetitionCounter = 0;//重复计数器的值
	TIM_TimeBaseInit(TIM2,&TIM_TimeBaseInitStructure); 
	 	
	TIM_OCInitTypeDef TIM_OCInitStructure;
	TIM_OCStructInit(&TIM_OCInitStructure);
	TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
	TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;//输出极性选择
	TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;//输出状态使能
	TIM_OCInitStructure.TIM_Pulse = 10;//CCR
	TIM_OC1Init(TIM2,&TIM_OCInitStructure);
	
	
	TIM_Cmd(TIM2,ENABLE);
}


void PWM_SetCompare1(uint16_t Compare)//不断调整CCR，实现呼吸灯效果
{
    
	TIM_SetCompare1(TIM2, Compare);
}

main.c

#include "stm32f10x.h" // Device header
#include "Delay.h"
#include "LED.h"
#include "Key.h"
#include "OLED.H"
#include "PWM.H"

uint8_t i;

int main(void)
{
    
	OLED_Init();
	PWM_Init();
	
	while (1)
	{
    
		for ( i = 0; i <= 100; i++)
		{
    
			PWM_SetCompare1(i);
			Delay_ms(10);//延迟一下，不然会太快了
		}	
		for ( i = 0; i <= 100; i++)
		{
    
			PWM_SetCompare1(100 - i);
			Delay_ms(10);
		}
	}
}

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