STM32F030 PB14和PB15无法输出PWM求助

wayhe 提问时间：2016-4-6 23:41 /

我需要使用STM32f030 的TIM1 的CH2和CH3通道输出互补PWM信号，实际测试发现PB14（TIM1_CH2N）PB15（TIM1_CH3N）无法输出，而TIM1_CH2和TIM1_CH3能正常输出。一直找不到原因。TIM1初始化程序如下：
void Time1_Configuration(void)
{
TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
      TIM_OCInitTypeDef       TIM_OCInitStructure;
      TIM_BDTRInitTypeDef    TIM_BDTRInitStructure;

//TIM_PeriodÉèÖÃÁËÔÚÏÂÒ»¸ö¸üÐÂÊÂ¼þ×°Èë»î¶¯µÄ×Ô¶¯ÖØ×°ÔØ¼Ä´æÆ÷ÖÜÆÚµÄÖµ¡£ËüµÄÈ¡Öµ±ØÐëÔÚ0x0000ºÍ0xFFFFÖ®¼ä
TIM_TimeBaseStructure.TIM_Period = TimerPeriod;                                                             //ÉèÖÃ¶¨Ê±Æ÷Ô¤·ÖÆµÖµÎª0
      //TIM_PrescalerÉèÖÃÁËÓÃÀ´×÷ÎªTIMxÊ±ÖÓÆµÂÊ³ýÊýµÄÔ¤·ÖÆµÖµ¡£ËüµÄÈ¡Öµ±ØÐëÔÚ0x0000ºÍ0xFFFFÖ®¼ä
TIM_TimeBaseStructure.TIM_Prescaler = 0;                                                 //ÉèÖÃ¶¨Ê±Æ÷Ê±ÖÓ·ÖÆµÖµ
TIM_TimeBaseStructure.TIM_ClockDivision = 0;                                                 //Ê±ÖÓ·Ö¸î
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;             //ÉèÖÃ¶¨Ê±Æ÷ÏòÉÏ¼ÆÊý
      TIM_TimeBaseStructure.TIM_RepetitionCounter = 0;                                  //ÉèÖÃ¶¨Ê±Æ÷ÖØ×°ÔØÖµ
TIM_TimeBaseInit(TIM1, & TIM_TimeBaseStructure);                                     //ÅäÖÃ¶¨Ê±Æ÷1

      /* ÆµµÀ1£¬2£¬3£¬4µÄPWM Ä£Ê½ÉèÖÃ */
      TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;                   //PWM1Ä£Ê½
      TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;       //Êä³ö±È½Ï×´Ì¬
      TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;    //»¥²¹Êä³ö±È½Ï×´Ì¬
      TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;             //Êä³ö¼«ÐÔÎªL
      TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High;          //»¥²¹Êä³ö¼«ÐÔÎªH
      TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Reset;          //¿ÕÏÐ×´Ì¬ÏÂÊä³ö¼«ÐÔReset
      TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCIdleState_Reset;       //¿ÕÏÐ×´Ì¬»¥²¹ÏÂÊä³ö¼«ÐÔ

      TIM_OCInitStructure.TIM_Pulse = Channel2Pulse;                                              //Ê¹ÄÜÆµµÀ2ÅäÖÃÖÜÆÚ
      TIM_OC2Init(TIM1, &TIM_OCInitStructure);

      TIM_OCInitStructure.TIM_Pulse = Channel3Pulse;                                              //Ê¹ÄÜÆµµÀ3ÅäÖÃÖÜÆÚ
      TIM_OC3Init(TIM1, &TIM_OCInitStructure);


      //TIM_OC2PreloadConfig(TIM1, TIM_OCPreload_Enable);                                     //Ê¹ÄÜÍ¨µÀ2Ô¤×°ÔØ
      //TIM_OC3PreloadConfig(TIM1, TIM_OCPreload_Enable);                                     //Ê¹ÄÜÍ¨µÀ3Ô¤×°ÔØ
      //TIM_ARRPreloadConfig(TIM1, ENABLE);


      /* PWM ËÀÇøÊ±¼äÉèÖÃ */
      TIM_BDTRInitStructure.TIM_OSSRState = TIM_OSSRState_Enable;             //Enable Running State
      TIM_BDTRInitStructure.TIM_OSSIState = TIM_OSSIState_Enable;             //Enable Idle State
      TIM_BDTRInitStructure.TIM_LOCKLevel = TIM_LOCKLevel_1;                //Set the lock level
      TIM_BDTRInitStructure.TIM_DeadTime = 20;                               //ËÀÇøÊ±¼ä:0x00-0xff
      TIM_BDTRInitStructure.TIM_Break = TIM_Break_Enable;                   //Enable the Break function
      TIM_BDTRInitStructure.TIM_BreakPolarity = TIM_BreakPolarity_High;
      TIM_BDTRInitStructure.TIM_AutomaticOutput = TIM_AutomaticOutput_Enable;  //Ê¹ÄÜ×Ô¶¯Êä³ö.

      TIM_BDTRConfig(TIM1, &TIM_BDTRInitStructure);

      TIM_ClearFlag(TIM1, TIM_FLAG_Update);                                                          //Çå³ýÖÐ¶Ï±êÖ¾·ÀÖ¹ÅäÖÃÍê³É´ò¿ªÖÐ¶ÏÊ±Á¢¼´²úÉúÖÐ¶Ï
      //TIM_ITConfig(TIM1, TIM_IT_Update, ENABLE );                                           //Ê¹ÄÜ¶¨Ê±Æ÷1¸üÐÂÖÐ¶Ï


      TIM_Cmd(TIM1, ENABLE);                                                                                           //Ê¹ÄÜ¶¨Ê±Æ÷1¹¦ÄÜ
      TIM_CtrlPWMOutputs(TIM1, ENABLE);                            //TIM1 Ö÷Êä³öÊ¹ÄÜ

}

IO初始化
RCC_AHBPeriphClockCmd( RCC_AHBPeriph_GPIOA, ENABLE);

GPIO_InitStruct.GPIO_Pin = TxD2 | RxD2 | PWM1L | PWM2L;          //¶Ë¿ÚTxD2 -> PA2 / RxD2 -> PA3 / PWM1L -> PA9 / PWM2L -> PA10
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF;                               //¸´ÓÃ
GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;                         //×î´óÊä³öËÙ¶È50MHz
GPIO_InitStruct.GPIO_OType = GPIO_OType_PP;                                  //¸´ÓÃ¹¦ÄÜÍÆÍìÊä³ö
GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_UP ;                               //ÉÏÀ
GPIO_Init(GPIOA, &GPIO_InitStruct);

GPIO_PinAFConfig(GPIOA, GPIO_PinSource2, GPIO_AF_1);                //USART2_TX
      GPIO_PinAFConfig(GPIOA, GPIO_PinSource3, GPIO_AF_1);                //USART2_RX
GPIO_PinAFConfig(GPIOA, GPIO_PinSource9, GPIO_AF_2);                //TIM1_CH2
GPIO_PinAFConfig(GPIOA, GPIO_PinSource10, GPIO_AF_2);             //TIM1_CH3

   RCC_AHBPeriphClockCmd( RCC_AHBPeriph_GPIOB, ENABLE);

GPIO_InitStruct.GPIO_Pin = TxD1 | RxD1 | PWM1H | PWM2H;          //¶Ë¿ÚTxD1 -> PB6 / RxD1 -> PB7 / PWM1H -> PB14 / PWM2H -> PB15
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF;                               //¸´ÓÃ
GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;                         //×î´óÊä³öËÙ¶È50MHz
GPIO_InitStruct.GPIO_OType = GPIO_OType_PP;                                     //¸´ÓÃ¹¦ÄÜÍÆÍìÊä³ö
GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_UP ;                   //
GPIO_Init(GPIOB, &GPIO_InitStruct);

      GPIO_PinAFConfig(GPIOB, GPIO_PinSource6, GPIO_AF_0);                //USART1_TX -> PB6
GPIO_PinAFConfig(GPIOB, GPIO_PinSource7, GPIO_AF_0);                //USART1_RX -> PB7
GPIO_PinAFConfig(GPIOB, GPIO_PinSource14, GPIO_AF_2);             //TIM1_CH2N
GPIO_PinAFConfig(GPIOB, GPIO_PinSource15, GPIO_AF_2);             //TIM1_CH3N

找了很久找不到问题点。

赞收藏评论11 发布时间：2016-4-6 23:41

11个回答

wayhe 回答时间：2016-4-7 16:02:37

有没有人遇到过，支支招呀。

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suoma 回答时间：2016-4-7 20:19:22

这是PWM专用引脚还是？不是就要使能该功能
然后示波器观察波形

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wayhe 回答时间：2016-4-7 22:15:39

PB14和PB15的复用功能2就是TIM1_CH2N,TIM1_CH3N,用示波器测试无信号输出。

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alisa123 回答时间：2016-4-8 08:31:59

wayhe 发表于 2016-4-7 22:15
PB14和PB15的复用功能2就是TIM1_CH2N,TIM1_CH3N,用示波器测试无信号输出。

最好能对着寄存器看看，有没有使能PWM输出，直接用库有时候会很坑人的。

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wayhe 回答时间：2016-4-8 17:15:17

alisa123 发表于 2016-4-8 08:31
最好能对着寄存器看看，有没有使能PWM输出，直接用库有时候会很坑人的。 ...

昨晚熬夜搞定了，确实是被库坑害了。对ST的库真是爱恨交加，害人的货。

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手机用户3314123041 回答时间：2017-11-2 09:07:51

wayhe 发表于 2016-4-8 17:15
昨晚熬夜搞定了，确实是被库坑害了。对ST的库真是爱恨交加，害人的货。

你好，请问是什么原因？最后怎么解决的呢？我现在也是遇到这个问题怎么搞都没有输出。。。。。。

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samhong 回答时间：2017-11-2 11:09:36

寄存器,古老的是好东西。被很多人忘了...

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wayhe 回答时间：2017-11-2 15:22:40

手机用户3314123041 发表于 2017-11-2 09:07
你好，请问是什么原因？最后怎么解决的呢？我现在也是遇到这个问题怎么搞都没有输出。。。。。。 ...

好久了，我也不记得改哪里了，要仔细核对一下寄存器。

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手机用户3314123041 回答时间：2017-11-2 15:29:01

wayhe 发表于 2017-11-2 15:22
好久了，我也不记得改哪里了，要仔细核对一下寄存器。

我改用TIM15了，谢谢了

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a707083746 回答时间：2020-5-26 16:59:04

我用的标准库没问题

这个库：
/**
  ******************************************************************************
  * @file stm32f0xx_tim.c
  * @author  MCD Application Team
  * @version V1.5.0
  * @date 05-December-2014
.......*/
void GPIO_Configuration(void)
{//PB15
  GPIO_InitTypeDef GPIO_InitStructure;
  RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOB , ENABLE);
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_15;
  GPIO_Init(GPIOB, &GPIO_InitStructure);
  GPIO_PinAFConfig(GPIOB, GPIO_PinSource15, GPIO_AF_2);
}
void TIM1_Config(void)
{//TIM1_CH3N
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
TIM_DeInit(TIM1);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);
TIM_TimeBaseStructure.TIM_Prescaler = 4000;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseStructure.TIM_Period = 144;
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseStructure.TIM_RepetitionCounter = 0x0;
TIM_TimeBaseInit(TIM1,&TIM_TimeBaseStructure);

TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Disable;//关
TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;
TIM_OCInitStructure.TIM_Pulse = 50;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low;
TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCPolarity_Low;
TIM_OC3Init(TIM1,&TIM_OCInitStructure);

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

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