STM32 PWM输出程序源码+头文件

ID:292626 · 发表于 2018-3-16 10:07

#include "pbdata.h"
void RCC_Configuration(void);
void GPIO_Configuration(void);
void TIM3_Configuration(void);
int main(void)
{
  u8 led_fx=1;
u16 led_dt=0;

RCC_Configuration(); //系统时钟初始化
GPIO_Configuration();//端口初始化
TIM3_Configuration();

while(1)
  {
if(led_fx==1)
led_dt++;
else
led_det--;
if(led_dt==300)
   led_fx=0;
if(led_det==0)
led_fx=0;

TIM_SetCompare2(TIM3, led_dt);
  }
}
void RCC_Configuration(void)
{
  SystemInit ();
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB,ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3,ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB1Periph_AFIO,ENABLE);
}
void GPIO_Configuration(void)
{
  GPIO_InitTypeDef GPIO_InitStructure;
//LED
GPIO_InitStructure.GPIO_Pin=GPIO_Pin_5;
GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode=GPIO_Mode_AF_PP;
GPIO_Init(GPIOB,&GPIO_InitStructure);
}
void TIM3_Configuration(void)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseStruct;
TIM_OCInitTypeDef TIM_OCInitStructure;

GPIO_PinRemapConfig(GPIO_PartialRemap_TIM3, ENABLE);
//TIM3初始化
TIM_TimeBaseStruct.TIM_Period=900;//初值
TIM_TimeBaseStruct.TIM_Prescaler=0;//预分频
TIM_TimeBaseStruct.TIM_ClockDivision=0;
TIM_TimeBaseStruct.TIM_CounterMode=TIM_CounterMode_Up;//向上
TIM_TimeBaseInit(TIM3,&TIM_TimeBaseStruct);
//PWM初始化
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
TIM_OCInitStructure.TIM_OutputState=TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low;

TIM_OC2Init(TIM3,&TIM_OCInitStructure);
TIM_OC2PreloadConfig(TIM3, TIM_OCPreload_Enable);

TIM_Cmd(TIM3,ENABLE);
}

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STM32 PWM输出程序源码+头文件

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