stm32 tim5输出PWM程序

以下是一个简单的基于STM32 TIM5的PWM输出程序：

#include "stm32f4xx.h"
#include "stm32f4xx_tim.h"
#include "stm32f4xx_rcc.h"

int main(void)
{
   //初始化TIM5
   TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStruct;
   RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM5, ENABLE);
   TIM_TimeBaseInitStruct.TIM_Prescaler = 1000;
   TIM_TimeBaseInitStruct.TIM_CounterMode = TIM_CounterMode_Up;
   TIM_TimeBaseInitStruct.TIM_Period = 100;
   TIM_TimeBaseInitStruct.TIM_ClockDivision = TIM_CKD_DIV1;
   TIM_TimeBaseInitStruct.TIM_RepetitionCounter = 0;
   TIM_TimeBaseInit(TIM5, &TIM_TimeBaseInitStruct);

   //初始化PWM模式
   TIM_OCInitTypeDef TIM_OCInitStruct;
   TIM_OCInitStruct.TIM_OCMode = TIM_OCMode_PWM1;
   TIM_OCInitStruct.TIM_OutputState = TIM_OutputState_Enable;
   TIM_OCInitStruct.TIM_OutputNState = TIM_OutputNState_Disable;
   TIM_OCInitStruct.TIM_Pulse = 50;
   TIM_OCInitStruct.TIM_OCPolarity = TIM_OCPolarity_High;
   TIM_OCInitStruct.TIM_OCNPolarity = TIM_OCNPolarity_Low;
   TIM_OCInitStruct.TIM_OCIdleState = TIM_OCIdleState_Reset;
   TIM_OCInitStruct.TIM_OCNIdleState = TIM_OCNIdleState_Reset;
   TIM_OC1Init(TIM5, &TIM_OCInitStruct);

   //启动TIM5
   TIM_Cmd(TIM5, ENABLE);

   while(1){
      //do something
   }
}

这个程序会在PA0引脚上输出一个50%的占空比的PWM波形，具体的占空比和频率可以通过修改TIM_OCInitStruct中的参数来实现。