求助这个f4板子怎么没有配置pwm成功，对应pb10

dinglou

#include "timer.h"
#include "led.h"

void TIM2_Int_Init(u16 arr,u16 psc)
{
  TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
        NVIC_InitTypeDef NVIC_InitStructure;

        RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
       
        TIM_TimeBaseStructure.TIM_Period = arr;
        TIM_TimeBaseStructure.TIM_Prescaler =psc; μ
        TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
        TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;  
        TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);

        TIM_ITConfig(TIM2,TIM_IT_Update,ENABLE );

       
        NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn;  
        NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;  
        NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3;
        NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
        NVIC_Init(&NVIC_InitStructure);


        TIM_Cmd(TIM2, ENABLE);

void TIM2_IRQHandler(void)   
{
        if (TIM_GetITStatus(TIM2, TIM_IT_Update) != RESET)  
                {
                TIM_ClearITPendingBit(TIM2, TIM_IT_Update  );  
                LED1=!LED1;
                }
}

void TIM2_PWM_Init(u16 arr,u16 psc)
{
        GPIO_InitTypeDef  GPIO_InitStructure;
        TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
        TIM_OCInitTypeDef TIM_OCInitLouding;
       
        RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
        RCC_AHB1PeriphResetCmd(RCC_AHB1Periph_GPIOB, ENABLE);
                //RCC_APB2PeriphResetCmd(RCC_APB2Periph_GPIOB | RCC_APB2Periph_AFIO,ENABLE);
               //GPIO_PinRemapConfig(GPIO_Remap_TIM2, ENABLE);
       
        RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB, ENABLE);
       
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;                       
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
        GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;//éÏà-       
             //GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;                
            //GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;               
  GPIO_Init(GPIOB, &GPIO_InitStructure);                                       

  TIM_TimeBaseStructure.TIM_Period = arr;
        TIM_TimeBaseStructure.TIM_Prescaler =psc;
        TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
        TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
        TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);

        TIM_OCInitLouding.TIM_OCMode=TIM_OCMode_PWM2;
        TIM_OCInitLouding.TIM_OCPolarity=TIM_OCPolarity_High;
        TIM_OCInitLouding.TIM_OutputState=TIM_OutputState_Enable;
        TIM_OC3Init(TIM2,&TIM_OCInitLouding);
        TIM_OC2PreloadConfig(TIM2, TIM_OCPreload_Enable);
       
        TIM_Cmd(TIM2, ENABLE);
}

DFY

①引脚没用复用 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
②使用错误的3初始化函数
TIM_OC3Init(TIM2,&TIM_OCInitLouding);


建议你先把正点原子的PWM实验对照一下步骤就知道错哪了
然后把定时器这章看一下

dinglou

DFY 发表于 2020-9-5 16:25
①引脚没用复用 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
②使用错误的3初始化函数
TIM_OC3Init(T ...

好的，谢谢。已经成功了