PWM相位差

最新推荐文章于 2024-05-07 15:12:02 发布

Alex.Wang~

最新推荐文章于 2024-05-07 15:12:02 发布

阅读量2.2k

点赞数 1

CC 4.0 BY-SA版权

分类专栏：单片机

本文链接：https://blog.youkuaiyun.com/wangtao19932008/article/details/106538243

单片机专栏收录该内容

25 篇文章

订阅专栏

#include "tim.h"
#include "stm32f10x.h"

void TIM3_Config(uint16_t pre,uint16_t arr)
{
   TIM_TimeBaseInitTypeDef  TIM_TimeBaseInitStructure;

   RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3,ENABLE);
   //这个函数就在一开始的时候使用切记
   TIM_DeInit(TIM3);
   //TIM
   TIM_TimeBaseInitStructure.TIM_Prescaler = pre;
   TIM_TimeBaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up;
   TIM_TimeBaseInitStructure.TIM_Period	 = arr;
   TIM_TimeBaseInitStructure.TIM_ClockDivision = 0;
   TIM_TimeBaseInitStructure.TIM_RepetitionCounter = 0;
   TIM_TimeBaseInit(TIM3,&TIM_TimeBaseInitStructure);

   //open periph
   TIM_Cmd(TIM3,ENABLE);
   
}
//TIM3 CH1 PA6  CH2 PA7
void PWM_Config(uint16_t pulse,uint16_t deg,FunctionalState status)
{
	TIM_OCInitTypeDef  TIM_OCInitStructure;
	GPIO_InitTypeDef  GPIO_InitStructure;
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_AFIO,ENABLE);

	//GPIO

  	 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7;
	 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
	 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
	 GPIO_Init(GPIOA,&GPIO_InitStructure);

	//TIM OC
	TIM_OC1PreloadConfig(TIM3,TIM_OCPreload_Enable);
	TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_Toggle;
	if(status)
	{
	   TIM_OCInitStructure.TIM_OutputState	= TIM_OutputState_Enable;
	}
	else
	{
	   TIM_OCInitStructure.TIM_OutputState	= TIM_OutputState_Disable;
	}
	TIM_OCInitStructure.TIM_Pulse = 0;
	TIM_OCInitStructure.TIM_OCPolarity	= TIM_OCPolarity_High;
	TIM_OC1Init(TIM3,&TIM_OCInitStructure);

	TIM_OC1PreloadConfig(TIM3,TIM_OCPreload_Enable);
	TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_Toggle;
	if(status)
	{
	   TIM_OCInitStructure.TIM_OutputState	= TIM_OutputState_Enable;
	}
	else
	{
	   TIM_OCInitStructure.TIM_OutputState	= TIM_OutputState_Disable;
	}
	TIM_OCInitStructure.TIM_Pulse = pulse;
    //当小于等于180度的时候使用相反的极性
	if(deg<=180)
	{
	   TIM_OCInitStructure.TIM_OCPolarity	= TIM_OCPolarity_Low;
	}
	//当大于的时候使用相同的极性
	else
	{
	   TIM_OCInitStructure.TIM_OCPolarity	= TIM_OCPolarity_High;
	}
	TIM_OC2Init(TIM3,&TIM_OCInitStructure);

    //最后一句使用
	TIM_CtrlPWMOutputs(TIM3,ENABLE);
}
/*
   *第一个参数是分频数
   *第二个参数是频率
   *第三个参数是需要相差的相位差多少度
   *第四个参数是关闭PWM输出与否
*/
void TIM_Func(uint16_t pre,uint16_t frequency,uint16_t deg,FunctionalState status)
{
   uint16_t pulse;
   uint16_t temp = 0;
   
   temp = deg;
   //时基的频率比需要的频率快一倍，因此周期短一半   传入的都是整数，，，，，在处理的时候才进行了减去一的操作
   TIM3_Config(pre-1,(72000000/pre)/(frequency*2)-1);
   //设置deg小于180度
   deg = deg%180;  
   //根据给定的deg求得需要反转的时间是什么时候，这里需要注意的是除以的是谁
   pulse = (deg/360.0)*(72000000/pre)/(frequency);
   //传入参数
   PWM_Config(pulse,temp,status);
}

#include "tim.h"

int main(void)
{
 
   TIM_Func(72,2,360,ENABLE);
   while(1);
}