STM32H750 HRTIM输出2路PWM信号的奇怪问题

georgepcb · 发表于 2020-2-13 16:06:53

我采用 HRTIM 在 HRTIM_CHA1和HRTIM_CHA2管脚输出2路占空比可调的PWM信号，分别采用如下两种方式，通过示波器获取的结果如下：
void HAL_HRTIM_MspInit(HRTIM_HandleTypeDef* hrtimHandle)
{
  if(hrtimHandle->Instance==HRTIM1)
  {
__HAL_RCC_HRTIM1_CLK_ENABLE();

/* HRTIM1 interrupt Init */
HAL_NVIC_SetPriority(HRTIM1_Master_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(HRTIM1_Master_IRQn);
HAL_NVIC_SetPriority(HRTIM1_TIMA_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(HRTIM1_TIMA_IRQn);
HAL_NVIC_SetPriority(HRTIM1_FLT_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(HRTIM1_FLT_IRQn);
  }
}

void HAL_HRTIM_MspPostInit(HRTIM_HandleTypeDef* hrtimHandle)
{
  GPIO_InitTypeDef GPIO_InitStruct = {0};
  if(hrtimHandle->Instance==HRTIM1)
  {
__HAL_RCC_GPIOC_CLK_ENABLE();
__HAL_RCC_GPIOA_CLK_ENABLE();
/**HRTIM GPIO Configuration
PC6    ------> HRTIM_CHA1
PC7    ------> HRTIM_CHA2
*/
GPIO_InitStruct.Pin = GPIO_PIN_6|GPIO_PIN_7;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF1_HRTIM1;
HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
  }
}

void HAL_HRTIM_MspDeInit(HRTIM_HandleTypeDef* hrtimHandle)
{
  if(hrtimHandle->Instance==HRTIM1)
  {
/* Peripheral clock disable */
__HAL_RCC_HRTIM1_CLK_DISABLE();

/* HRTIM1 interrupt Deinit */
HAL_NVIC_DisableIRQ(HRTIM1_Master_IRQn);
HAL_NVIC_DisableIRQ(HRTIM1_TIMA_IRQn);
   HAL_NVIC_DisableIRQ(HRTIM1_FLT_IRQn);
  }
}

第一种方式：
void PWM_ConfigA(void)
{
  HRTIM_TimeBaseCfgTypeDef sConfig_time_base = {0};
  HRTIM_SimplePWMChannelCfgTypeDef pSimpleOCChannelCfg = {0};

  hhrtim.Instance = HRTIM1;
  hhrtim.Init.HRTIMInterruptResquests = HRTIM_IT_NONE;
  hhrtim.Init.SyncOptions = HRTIM_SYNCOPTION_NONE;
  if (HAL_HRTIM_Init(&hhrtim) != HAL_OK)
  {
ErrorHandler();
  }
  sConfig_time_base.PrescalerRatio = HRTIM_PRESCALERRATIO_DIV1;
  sConfig_time_base.Mode = HRTIM_MODE_CONTINUOUS;
  sConfig_time_base.RepetitionCounter = 0;

  sConfig_time_base.Period =  1000;

  if (HAL_HRTIM_TimeBaseConfig(&hhrtim, HRTIM_TIMERINDEX_TIMER_A, &sConfig_time_base) != HAL_OK)
  {
ErrorHandler();
  }

  pSimpleOCChannelCfg.Pulse =  250;
  pSimpleOCChannelCfg.Polarity = HRTIM_OUTPUTPOLARITY_HIGH;
  pSimpleOCChannelCfg.IdleLevel = HRTIM_OUTPUTIDLELEVEL_INACTIVE;

  if (HAL_HRTIM_SimplePWMChannelConfig(&hhrtim, HRTIM_TIMERINDEX_TIMER_A, HRTIM_OUTPUT_TA1, &pSimpleOCChannelCfg) != HAL_OK)
  {
ErrorHandler();
  }

  if (HAL_HRTIM_SimplePWMChannelConfig(&hhrtim, HRTIM_TIMERINDEX_TIMER_A, HRTIM_OUTPUT_TA2, &pSimpleOCChannelCfg) != HAL_OK)
  {
ErrorHandler();
  }

  HAL_HRTIM_MspPostInit(&hhrtim);

  if (HAL_HRTIM_SimplePWMStart(&hhrtim, HRTIM_TIMERINDEX_TIMER_A, HRTIM_OUTPUT_TA1) != HAL_OK)
  {
ErrorHandler();
  }

  if (HAL_HRTIM_SimplePWMStart(&hhrtim, HRTIM_TIMERINDEX_TIMER_A, HRTIM_OUTPUT_TA2) != HAL_OK)
  {
ErrorHandler();
  }
}
运行后示波器观察只有HRTIM_CHA1有输出，占空比正确25%; HRTIM_CHA2则没有输出。就算注释掉HRTIM_CHA1输出，HRTIM_CHA2仍然没有输出。

然后我换一种方式：
void PWM_Config(void)
{
  HRTIM_TimeBaseCfgTypeDef sConfig_time_base = {0};
  HRTIM_TimerCfgTypeDef pTimerCfg = {0};
  HRTIM_CompareCfgTypeDef sConfig_compare = {0};
  HRTIM_OutputCfgTypeDef sConfig_output_config = {0};

  hhrtim.Instance = HRTIM1;
  hhrtim.Init.HRTIMInterruptResquests = HRTIM_IT_NONE;
  hhrtim.Init.SyncOptions = HRTIM_SYNCOPTION_NONE;
  if (HAL_HRTIM_Init(&hhrtim) != HAL_OK)
  {
ErrorHandler();
  }

  HAL_HRTIM_MspPostInit(&hhrtim);

  sConfig_time_base.RepetitionCounter = 0;
  sConfig_time_base.PrescalerRatio = HRTIM_PRESCALERRATIO_DIV1
  sConfig_time_base.Mode = HRTIM_MODE_CONTINUOUS;

  sConfig_time_base.Period = 1000;
  if (HAL_HRTIM_TimeBaseConfig(&hhrtim, HRTIM_TIMERINDEX_TIMER_A, &sConfig_time_base) != HAL_OK)
  {
ErrorHandler();
  }

  pTimerCfg.InterruptRequests = HRTIM_TIM_IT_NONE;
  pTimerCfg.DMARequests = HRTIM_TIM_DMA_NONE;
  pTimerCfg.HalfModeEnable = HRTIM_HALFMODE_DISABLED;
  pTimerCfg.StartOnSync = HRTIM_SYNCSTART_DISABLED;
  pTimerCfg.ResetOnSync = HRTIM_SYNCRESET_DISABLED;
  pTimerCfg.DACSynchro = HRTIM_DACSYNC_NONE;
  pTimerCfg.PreloadEnable = HRTIM_PRELOAD_ENABLED;
  pTimerCfg.UpdateGating = HRTIM_UPDATEGATING_INDEPENDENT;
  pTimerCfg.BurstMode = HRTIM_TIMERBURSTMODE_MAINTAINCLOCK;
  pTimerCfg.RepetitionUpdate = HRTIM_UPDATEONREPETITION_ENABLED;
  pTimerCfg.PushPull = HRTIM_TIMPUSHPULLMODE_DISABLED;
  pTimerCfg.FaultEnable = HRTIM_TIMFAULTENABLE_NONE;
  pTimerCfg.FaultLock = HRTIM_TIMFAULTLOCK_READWRITE;
  pTimerCfg.DeadTimeInsertion = HRTIM_TIMDEADTIMEINSERTION_ENABLED;
  pTimerCfg.DelayedProtectionMode = HRTIM_TIMER_A_B_C_DELAYEDPROTECTION_DISABLED;
  pTimerCfg.UpdateTrigger = HRTIM_TIMUPDATETRIGGER_NONE;
  pTimerCfg.ResetTrigger = HRTIM_TIMRESETTRIGGER_NONE;
  pTimerCfg.ResetUpdate = HRTIM_TIMUPDATEONRESET_DISABLED;

  pTimerCfg.DMASrcAddress = 0x0000;
  pTimerCfg.DMADstAddress = 0x0000;
  pTimerCfg.DMASize = 0x1;
  if (HAL_HRTIM_WaveformTimerConfig(&hhrtim, HRTIM_TIMERINDEX_TIMER_A, &pTimerCfg) != HAL_OK)
  {
ErrorHandler();
  }

  sConfig_compare.AutoDelayedMode = HRTIM_AUTODELAYEDMODE_REGULAR;
  sConfig_compare.AutoDelayedTimeout = 0;
  sConfig_compare.CompareValue = 250;
  if (HAL_HRTIM_WaveformCompareConfig(&hhrtim, HRTIM_TIMERINDEX_TIMER_A, HRTIM_COMPAREUNIT_1, &sConfig_compare) != HAL_OK)
  {
ErrorHandler();
  }

  sConfig_output_config.Polarity = HRTIM_OUTPUTPOLARITY_HIGH;
  sConfig_output_config.SetSource = HRTIM_OUTPUTSET_TIMCMP1;
  sConfig_output_config.ResetSource = HRTIM_OUTPUTRESET_TIMCMP1;
  sConfig_output_config.IdleMode = HRTIM_OUTPUTIDLEMODE_NONE;
  sConfig_output_config.IdleLevel = HRTIM_OUTPUTIDLELEVEL_INACTIVE;
  sConfig_output_config.FaultLevel = HRTIM_OUTPUTFAULTLEVEL_NONE;
  sConfig_output_config.ChopperModeEnable = HRTIM_OUTPUTCHOPPERMODE_DISABLED;
  sConfig_output_config.BurstModeEntryDelayed = HRTIM_OUTPUTBURSTMODEENTRY_REGULAR;

  if (HAL_HRTIM_WaveformOutputConfig(&hhrtim, HRTIM_TIMERINDEX_TIMER_A, HRTIM_OUTPUT_TA1, &sConfig_output_config) != HAL_OK)
  {
ErrorHandler();
  }
  sConfig_output_config.SetSource = HRTIM_OUTPUTSET_NONE;
  sConfig_output_config.ResetSource = HRTIM_OUTPUTRESET_NONE;
  sConfig_output_config.Polarity = HRTIM_OUTPUTPOLARITY_LOW;
  if (HAL_HRTIM_WaveformOutputConfig(&hhrtim, HRTIM_TIMERINDEX_TIMER_A, HRTIM_OUTPUT_TA2, &sConfig_output_config) != HAL_OK)
  {
ErrorHandler();
  }

  HAL_HRTIM_MspPostInit(&hhrtim);

  if (HAL_HRTIM_WaveformOutputStart(&hhrtim, HRTIM_OUTPUT_TA1 + HRTIM_OUTPUT_TA2) != HAL_OK)
  {
ErrorHandler();
  }

  if (HAL_HRTIM_WaveformCounterStart(&hhrtim, HRTIM_TIMERID_TIMER_A) != HAL_OK)
  {
ErrorHandler();
  }
}

示波器观察到CHA1和CHA2都有输出，但是占空比固定为50%，不是需要的25%（已经关闭了pTimerCfg.HalfModeEnable = HRTIM_HALFMODE_DISABLED;）。

请问，我该如何在HRTIM_CHA1和CHA2都获得可调占空比的输出波形啊？

谢谢！