STM32

高级定时器1，死区设置为什么没有效果

2019-07-21 04:14发布

站内问答 / STM32/STM8
2286 7 1033
void TIM1_PWM_Init(u32 arr,u32 psc)
{  
u32 TimerPeriod,ccr1,ccr2;

TIM_TimeBaseInitTypeDef   TIM_TimeBaseInitStructure;
TIM_OCInitTypeDef   TIM_OCInitStructure;
TIM_BDTRInitTypeDef     TIM_BdtrStructure;
GPIO_InitTypeDef GPIO_InitStructure;

RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOE,ENABLE);
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10 | GPIO_Pin_11;

GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
GPIO_Init(GPIOE,&GPIO_InitStructure);

GPIO_PinAFConfig(GPIOE,GPIO_PinSource8,GPIO_AF_TIM1);
GPIO_PinAFConfig(GPIOE,GPIO_PinSource9,GPIO_AF_TIM1);
GPIO_PinAFConfig(GPIOE,GPIO_PinSource10,GPIO_AF_TIM1);
GPIO_PinAFConfig(GPIOE,GPIO_PinSource11,GPIO_AF_TIM1);


TimerPeriod =  (SystemCoreClock / 10000 ) - 1;
  ccr1 = TimerPeriod / 2;  //1/2 = 50%
  ccr2 = TimerPeriod / 2;  //1/2 = 50%
  
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1,ENABLE);

  TIM_TimeBaseInitStructure.TIM_ClockDivision = TIM_CKD_DIV1; 
  TIM_TimeBaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up; 
  TIM_TimeBaseInitStructure.TIM_Prescaler = 199;   //Timer clock = sysclock /(TIM_Prescaler+1) = 168M
  TIM_TimeBaseInitStructure.TIM_RepetitionCounter = 0;
  TIM_TimeBaseInitStructure.TIM_Period = TimerPeriod - 1;//Period = (TIM counter clock / TIM output clock) - 1 = 20K
  TIM_TimeBaseInit(TIM1,&TIM_TimeBaseInitStructure);

  
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 = ccr1;
  TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
  TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCPolarity_High;
  TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set;
  TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCNIdleState_Reset;
  
  TIM_OC1Init(TIM1,&TIM_OCInitStructure);

  TIM_OCInitStructure.TIM_Pulse = ccr2;
  TIM_OC2Init(TIM1,&TIM_OCInitStructure);
  
//  TIM_OCInitStructure.TIM_Pulse = ccr3;
//  TIM_OC3Init(TIM1,&TIM_OCInitStructure);
  
//  TIM_OCInitStructure.TIM_Pulse = ccr4;
//  TIM_OC4Init(TIM1,&TIM_OCInitStructure);

  TIM_BdtrStructure.TIM_OSSRState       = TIM_OSSRState_Enable; //ê1?üTIM1 OSSR×′ì?
TIM_BdtrStructure.TIM_OSSIState       = TIM_OSSIState_Enable; //ê1?üTIM1 OSSI×′ì?
TIM_BdtrStructure.TIM_LOCKLevel       = TIM_LOCKLevel_1; //2???è?o???
TIM_BdtrStructure.TIM_DeadTime        = 20; //ê?3?′ò?aoí1?±?×′ì?????μ??óê±￡??à??ê±??
TIM_BdtrStructure.TIM_Break           = TIM_Break_Disable; //ê§?üTIM1é23μê?è?
TIM_BdtrStructure.TIM_BreakPolarity   = TIM_BreakPolarity_High; //TIM1é23μê?è?1ü????D???
TIM_BdtrStructure.TIM_AutomaticOutput = TIM_AutomaticOutput_Enable; //×??ˉê?3?1|?üê1?ü
TIM_BDTRConfig(TIM1, &TIM_BdtrStructure);

  
  TIM_Cmd(TIM1,ENABLE);
  TIM_CtrlPWMOutputs(TIM1,ENABLE);

} 
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7条回答
love515354
2019-07-21 06:29
 精彩回答 2  元偷偷看……0人看过

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