STM32F407ZGT6 TIM8 CH2/3 PWM 互补不输出

xianglongjudz · 发表于 2019-8-19 11:29:02

下面是程序
TIM8定时器好像是工作了，但，PWM无输出
void IO_Configuration(void)
{
GPIO_InitTypeDef  GPIO_InitStructure;

      GPIO_InitStructure.GPIO_Pin = GPIO_PinSource0|GPIO_PinSource1;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_Init(GPIOB,&GPIO_InitStructure);

GPIO_PinAFConfig(GPIOC,GPIO_PinSource7|GPIO_PinSource8,GPIO_AF_TIM8);
GPIO_PinAFConfig(GPIOB,GPIO_PinSource0|GPIO_PinSource1,GPIO_AF_TIM8);
}

void TIM_Configuration(void)
{

  TIM_TimeBaseInitTypeDef TIM_TimeBaseStruct;
  TIM_DeInit(TIM8);
  TIM_TimeBaseStruct.TIM_Period       = 7000;
  TIM_TimeBaseStruct.TIM_Prescaler          = 0;
  TIM_TimeBaseStruct.TIM_ClockDivision       = TIM_CKD_DIV1;
  TIM_TimeBaseStruct.TIM_CounterMode    = TIM_CounterMode_Up;
  TIM_TimeBaseStruct.TIM_RepetitionCounter  = 0;
  TIM_TimeBaseInit(TIM8, &TIM_TimeBaseStruct);
}

void PWM_Configuration(void)
{
TIM_OCInitTypeDef       TIM_OCInitStructure;
TIM_BDTRInitTypeDef    TIM8_BDTRInitStruct;

TIM_OCInitStructure.TIM_OCMode                = TIM_OCMode_PWM1;
TIM_OCInitStructure.TIM_OutputState          = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_OutputNState          = TIM_OutputNState_Enable;
TIM_OCInitStructure.TIM_Pulse                  = 0;
TIM_OCInitStructure.TIM_OCPolarity    = TIM_OCPolarity_High;
TIM_OCInitStructure.TIM_OCNPolarity    = TIM_OCNPolarity_High;
TIM_OCInitStructure.TIM_OCIdleState    = TIM_OCIdleState_Reset;
TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCIdleState_Reset;
TIM_OC2Init(TIM8, &TIM_OCInitStructure);

TIM_OCInitStructure.TIM_OCMode                = TIM_OCMode_PWM1;
TIM_OCInitStructure.TIM_OutputState          = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_OutputNState          = TIM_OutputNState_Enable;
TIM_OCInitStructure.TIM_Pulse                  = 0;
TIM_OCInitStructure.TIM_OCPolarity    = TIM_OCPolarity_High;
TIM_OCInitStructure.TIM_OCNPolarity    = TIM_OCNPolarity_High;
TIM_OCInitStructure.TIM_OCIdleState    = TIM_OCIdleState_Reset;
TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCIdleState_Reset;
TIM_OC3Init(TIM8, &TIM_OCInitStructure);

TIM_OC2PreloadConfig(TIM8, TIM_OCPreload_Enable);
TIM_OC3PreloadConfig(TIM8, TIM_OCPreload_Enable);

TIM8_BDTRInitStruct.TIM_OSSRState = TIM_OSSRState_Enable;
TIM8_BDTRInitStruct.TIM_OSSIState = TIM_OSSIState_Enable;
TIM8_BDTRInitStruct.TIM_LOCKLevel = TIM_LOCKLevel_OFF;
TIM8_BDTRInitStruct.TIM_DeadTime    = 0x10;
TIM8_BDTRInitStruct.TIM_Break      = TIM_Break_Disable;
TIM8_BDTRInitStruct.TIM_BreakPolarity = TIM_BreakPolarity_High;
TIM8_BDTRInitStruct.TIM_AutomaticOutput = TIM_AutomaticOutput_Enable;
TIM_BDTRConfig(TIM8, &TIM8_BDTRInitStruct);

TIM_ARRPreloadConfig(TIM8, ENABLE);
      TIM_ClearITPendingBit(TIM8,TIM_IT_Update);
TIM_ITConfig(TIM8,TIM_IT_Update,ENABLE);
TIM_CtrlPWMOutputs(TIM8, ENABLE);

TIM_CCxCmd(TIM8,TIM_Channel_2,TIM_CCx_Enable);
TIM_CCxNCmd(TIM8,TIM_Channel_2,TIM_CCxN_Enable);
TIM_CCxCmd(TIM8,TIM_Channel_3,TIM_CCx_Enable);
TIM_CCxNCmd(TIM8,TIM_Channel_3,TIM_CCxN_Enable);
}

xianglongjudz · 发表于 2019-8-19 11:30:47

希望大家帮忙分析一下，是怎么回事呢？

xianglongjudz · 发表于 2019-8-19 11:48:05

本帖最后由 xianglongjudz 于 2019-8-19 11:52 编辑

顶一下，别再沉了

xianglongjudz · 发表于 2019-8-19 11:51:44

检查了，没有发现，PB0/1 PC7/8有被其它程序IO重复定义的！

glenxu · 发表于 2019-8-19 13:12:12

怎么没看见输出ENABLE !!!

xianglongjudz · 发表于 2019-8-19 14:17:25

glenxu 发表于 2019-8-19 13:12
怎么没看见输出ENABLE !!!

void RCC_Configuration(void)
{
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);//ê1ÄüPAê±Öó
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB, ENABLE);//ê1ÄüPBê±Öó
  RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC, ENABLE);//ê1ÄüPCê±Öó
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOD, ENABLE);//ê1ÄüPDê±Öó
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOE, ENABLE);//ê1ÄüPEê±Öó
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOF, ENABLE);//ê1ÄüPFê±Öó
  RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOG, ENABLE);//ê1ÄüPGê±Öó
RCC_AHB3PeriphClockCmd(RCC_AHB3Periph_FSMC , ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2 , ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3 , ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4 , ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM5 , ENABLE);
//RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM7 , ENABLE);//
RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM8 , ENABLE);//
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM12, ENABLE);//
}

在主程序里调用