STM32

stm32f103输出互补的PWM波存在问题

2019-08-14 17:51发布

站内问答 / STM32/STM8
14011 1 1464
代码如下
void TIM1_PWM_Init(u16 arr,u16 psc)
{  
  GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
TIM_OCInitTypeDef  TIM_OCInitStructure;
TIM_BDTRInitTypeDef TIM_BDTRInitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);// ʹÄÜTIME1ʱÖÓ
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_GPIOB|RCC_APB2Periph_AFIO, ENABLE);  //ʹÄÜGPIOºÍAFIO¸´Óù¦ÄÜʱÖÓ
                                                                       
  //½«Ô­±¾µ&AumlB13¡¢14µÄTIM1_ch1Nch2NÓ³Éäµ&frac12A7¡&centB0
  //ÉèÖøÃÒý½ÅΪ¸´ÓÃÊä³ö¹¦ÄÜ,Êä³öTIM1 CH1µ&AumlWMÂö³å²¨ÐÎ
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7|GPIO_Pin_8|GPIO_Pin_9; //TIM1_CH1ch2
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;  //¸´ÓÃÍÆÍìÊä³ö
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin =GPIO_Pin_0; //TIM1_CH1Nch2N
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;  //¸´ÓÃÍÆÍìÊä³ö
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure);
GPIO_PinRemapConfig(GPIO_PartialRemap_TIM1,ENABLE);//ÖØÓ³Éä

TIM_TimeBaseStructure.TIM_Period = arr; //ÉèÖÃÔÚÏÂÒ»¸ö¸üÐÂʼþ×°Èë»î¶¯µÄ×Ô¶¯ÖØ×°ÔؼĴæÆ÷ÖÜÆÚµÄÖµ
TIM_TimeBaseStructure.TIM_Prescaler =psc; //ÉèÖÃÓÃÀ´×÷ΪTIMxʱÖÓƵÂʳýÊýµÄÔ¤·ÖƵֵ  ²»·ÖƵ
TIM_TimeBaseStructure.TIM_ClockDivision = 0; //ÉèÖÃʱÖÓ·Ö¸î:TDTS = Tck_tim
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;  //TIMÏòÉϼÆÊýģʽ
TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure); //¸ù¾ÝTIM_TimeBaseInitStructÖÐÖ¸¶¨µÄ²ÎÊý³õʼ»¯TIMxµÄʱ¼ä»ùÊýµ¥Î»
  TIM_ARRPreloadConfig(TIM1,DISABLE);//½ûÖ¹ARRԤװ»º³åÆ÷

TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2; //Ñ¡Ôñ¶¨Ê±Æ÷ģʽ:TIMÂö³å¿í¶Èµ÷ÖÆģʽ2
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //±È½ÏÊä³öʹÄÜ
TIM_OCInitStructure.TIM_Pulse = 0; //ÉèÖôý×°È벶»ñ±È½Ï¼Ä´æÆ÷µÄÂö³åÖµ
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; //Êä³ö¼«ÐÔ:TIMÊä³ö±È½Ï¼«ÐÔ¸ß
TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High; //Êä³ö¼«ÐÔ:TIMÊä³ö±È½Ï¼«ÐÔ¸ß
TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Reset;
TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCIdleState_Reset;
TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;//»¥²¹Êä³öʹÄÜ

TIM_OC1Init(TIM1, &TIM_OCInitStructure);  //¸ù¾ÝTIM_OCInitStructÖÐÖ¸¶¨µÄ²ÎÊý³õʼ»¯ÍâÉèTIMx
  TIM_OC2Init(TIM1, &TIM_OCInitStructure);  //¸ù¾ÝTIM_OCInitStructÖÐÖ¸¶¨µÄ²ÎÊý³õʼ»¯ÍâÉèTIMx
// TIM_OC3Init(TIM1, &TIM_OCInitStructure);  //¸ù¾ÝTIM_OCInitStructÖÐÖ¸¶¨µÄ²ÎÊý³õʼ»¯ÍâÉèTIMx
// TIM_OC4Init(TIM1, &TIM_OCInitStructure);  //¸ù¾ÝTIM_OCInitStructÖÐÖ¸¶¨µÄ²ÎÊý³õʼ»¯ÍâÉèTIMx
//siqu/////////////////////////////////////////////////////////////////////////////////////////////////
TIM_BDTRInitStructure.TIM_OSSRState = TIM_OSSRState_Disable;
TIM_BDTRInitStructure.TIM_OSSIState = TIM_OSSIState_Disable;
TIM_BDTRInitStructure.TIM_LOCKLevel = TIM_LOCKLevel_OFF;
//bit7~5 = 111,Ôòdeadtime = (32 + (bit4~bit0)* 16*1/fosc)ns = (32+31)*16*1/72000000 = 14us
TIM_BDTRInitStructure.TIM_DeadTime = 0x10; //ÕâÀïµ÷ÕûËÀÇø´óС0-0xff     ËÀÇø×î´ó14us
TIM_BDTRInitStructure.TIM_Break = TIM_Break_Disable;
TIM_BDTRInitStructure.TIM_BreakPolarity = TIM_BreakPolarity_High;
TIM_BDTRInitStructure.TIM_AutomaticOutput = TIM_AutomaticOutput_Disable;
TIM_BDTRConfig(TIM1, &TIM_BDTRInitStructure);
  TIM_CtrlPWMOutputs(TIM1,ENABLE);//¸ß¼¶¶¨Ê±Æ÷µÄÊä³ö¿ØÖÆʹÄÜɲ³µMOEÖ÷Êä³öʹÄÜ
TIM_OC1PreloadConfig(TIM1, TIM_OCPreload_Enable);  //CH1ԤװÔØʹÄÜ  
TIM_OC2PreloadConfig(TIM1, TIM_OCPreload_Enable);  //CH1ԤװÔØʹÄÜ  
// TIM_OC3PreloadConfig(TIM1, TIM_OCPreload_Enable);  //CH1ԤװÔØʹÄÜ  
// TIM_OC4PreloadConfig(TIM1, TIM_OCPreload_Enable);  //CH1ԤװÔØʹÄÜ  
TIM_ARRPreloadConfig(TIM1, ENABLE); //ʹÄÜTIMxÔÚARRÉϵÄԤװÔؼĴæÆ÷

TIM_Cmd(TIM1, ENABLE);  //ʹÄÜTIM1

   
}

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1条回答
南方
2019-08-14 23:11
void TIM1_PWM_OCxN_Init(void)
{
  GPIO_InitTypeDef GPIO_InitStructure;
  TIM_TimeBaseInitTypeDef TIM_BaseInitStructure;
        TIM_BDTRInitTypeDef TIM_BDTRInitStructure;
  TIM_OCInitTypeDef TIM_OCInitStructure;

  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_GPIOB|RCC_APB2Periph_GPIOE, ENABLE);
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);      
  
        GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
        GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
        GPIO_Init(GPIOB, &GPIO_InitStructure);

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8 ;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(GPIOA, &GPIO_InitStructure);

  TIM_BaseInitStructure.TIM_Period = 4999;//576-1;//   //125kHZ  (72M/125k)-1=575
  TIM_BaseInitStructure.TIM_Prescaler = 2;
  TIM_BaseInitStructure.TIM_ClockDivision = 0;
  TIM_BaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up;
  TIM_BaseInitStructure.TIM_RepetitionCounter = 0;
  TIM_TimeBaseInit(TIM1, &TIM_BaseInitStructure);

  TIM_ARRPreloadConfig(TIM1, ENABLE);
       
  TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
  TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;
  TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
  TIM_OCInitStructure.TIM_OCNPolarity =TIM_OCNPolarity_High; //TIM_OCNPolarity_Low;
  TIM_OCInitStructure.TIM_OCIdleState  = TIM_OCIdleState_Set;         //???????1
  TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCIdleState_Reset;   //?????????0  
  TIM_OCInitStructure.TIM_Pulse = 2500;///288;  // 50%???= 576/2
  TIM_OC1Init(TIM1, &TIM_OCInitStructure);

  TIM_OC1PreloadConfig(TIM1, TIM_OCPreload_Enable);   
//  ËàÇøéèÖà  
        TIM_BDTRInitStructure.TIM_OSSRState = TIM_OSSRState_Enable;  
        TIM_BDTRInitStructure.TIM_OSSIState = TIM_OSSIState_Enable;
        TIM_BDTRInitStructure.TIM_LOCKLevel = TIM_LOCKLevel_OFF;  
        TIM_BDTRInitStructure.TIM_DeadTime = 0x90;  //Õaàïμ÷ÕûËàÇø′óD¡0-0xff  0x90¼′ËàÇøê±¼äÎa2us×óóò
        TIM_BDTRInitStructure.TIM_Break = TIM_Break_Disable;  
        TIM_BDTRInitStructure.TIM_BreakPolarity = TIM_BreakPolarity_High;   
        TIM_BDTRInitStructure.TIM_AutomaticOutput = TIM_AutomaticOutput_Enable;  
        TIM_BDTRConfig(TIM1, &TIM_BDTRInitStructure);  
        TIM_Cmd(TIM1, ENABLE); //ê1Äü¶¨ê±Æ÷1
        TIM_CtrlPWMOutputs(TIM1, ENABLE);

  TIM_Cmd(TIM1, ENABLE);

  TIM_CtrlPWMOutputs(TIM1, ENABLE);
}

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