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我正在使用 STM32L476 Nucleo 板和 STM32CubeMX。我想将输出比较通道 1 用于 2 毫秒的超时。我已经配置了定时器，但定时器没有为输出比较提供中断。我在给定时器的时间段内收到中断，但不是为了输出比较。

这是我的计时器配置：

static void MX_TIM1_Init(void)
{

  /* USER CODE BEGIN TIM1_Init 0 */

  /* USER CODE END TIM1_Init 0 */

  TIM_ClockConfigTypeDef sClockSourceConfig = {0};
  TIM_SlaveConfigTypeDef sSlaveConfig = {0};
  TIM_MasterConfigTypeDef sMasterConfig = {0};
  TIM_OC_InitTypeDef sConfigOC = {0};
  TIM_BreakDeadTimeConfigTypeDef sBreakDeadTimeConfig = {0};

  /* USER CODE BEGIN TIM1_Init 1 */

  /* USER CODE END TIM1_Init 1 */
  htim1.Instance = TIM1;
  htim1.Init.Prescaler = TIMER1_PRESCALER_VAL;
  htim1.Init.CounterMode = TIM_COUNTERMODE_UP;
  htim1.Init.Period = TIMER_PERIOD;
  htim1.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
  htim1.Init.RepetitionCounter = 0;
  htim1.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;
  if (HAL_TIM_Base_Init(&htim1) != HAL_OK)
  {
    Error_Handler();
  }
  sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_INTERNAL;
  if (HAL_TIM_ConfigClockSource(&htim1, &sClockSourceConfig) != HAL_OK)
  {
    Error_Handler();
  }
  if (HAL_TIM_OC_Init(&htim1) != HAL_OK)
  {
    Error_Handler();
  }
  sSlaveConfig.SlaveMode = TIM_SLAVEMODE_DISABLE;
  sSlaveConfig.InputTrigger = TIM_TS_ITR0;
  if (HAL_TIM_SlaveConfigSynchro(&htim1, &sSlaveConfig) != HAL_OK)
  {
    Error_Handler();
  }
  sMasterConfig.MasterOutputTrigger = TIM_TRGO_OC1REF;
  sMasterConfig.MasterOutputTrigger2 = TIM_TRGO2_RESET;
  sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
  if (HAL_TIMEx_MasterConfigSynchronization(&htim1, &sMasterConfig) != HAL_OK)
  {
    Error_Handler();
  }
  sConfigOC.OCMode = TIM_OCMODE_ACTIVE;
  sConfigOC.Pulse = 1000 * TIMER_OC_1_VAL;
  sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;
  sConfigOC.OCNPolarity = TIM_OCNPOLARITY_HIGH;
  sConfigOC.OCFastMode = TIM_OCFAST_DISABLE;
  sConfigOC.OCIdleState = TIM_OCIDLESTATE_RESET;
  sConfigOC.OCNIdleState = TIM_OCNIDLESTATE_RESET;
  if (HAL_TIM_OC_ConfigChannel(&htim1, &sConfigOC, TIM_CHANNEL_1) != HAL_OK)
  {
    Error_Handler();
  }
  sBreakDeadTimeConfig.OffStateRunMode = TIM_OSSR_DISABLE;
  sBreakDeadTimeConfig.OffStateIDLEMode = TIM_OSSI_DISABLE;
  sBreakDeadTimeConfig.LockLevel = TIM_LOCKLEVEL_OFF;
  sBreakDeadTimeConfig.DeadTime = 0;
  sBreakDeadTimeConfig.BreakState = TIM_BREAK_DISABLE;
  sBreakDeadTimeConfig.BreakPolarity = TIM_BREAKPOLARITY_HIGH;
  sBreakDeadTimeConfig.BreakFilter = 0;
  sBreakDeadTimeConfig.Break2State = TIM_BREAK2_DISABLE;
  sBreakDeadTimeConfig.Break2Polarity = TIM_BREAK2POLARITY_HIGH;
  sBreakDeadTimeConfig.Break2Filter = 0;
  sBreakDeadTimeConfig.AutomaticOutput = TIM_AUTOMATICOUTPUT_DISABLE;
  if (HAL_TIMEx_ConfigBreakDeadTime(&htim1, &sBreakDeadTimeConfig) != HAL_OK)
  {
    Error_Handler();
  }
  /* USER CODE BEGIN TIM1_Init 2 */
  HAL_TIM_OC_Start_IT(&htim1,TIM_IT_CC1);

  /* USER CODE END TIM1_Init 2 */
  HAL_TIM_MspPostInit(&htim1);

}

我尝试更改该sConfigOC.Pulse值，但没有看到预期的行为。

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3 回答 3

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您是否在中断处理程序中检查正确的中断标志？另请记住，您必须立即清除标志。

我的 IRQHandler 看起来像这样，如果这对你有帮助的话。

void TIM3_IRQHandler(void) {

    if(LL_TIM_IsActiveFlag_CC1(TIM3) == 1) {
        LL_TIM_ClearFlag_CC1(TIM3);
        TimerCaptureCompare_Callback();
    }
}

编辑：

看起来不错，HAL_TIM_OC_DelayElapsedCallback只有在定时器溢出（即重置）时才会触发中断。 这意味着您必须启用溢出中断，因为HAL_TIM_OC_Start_IT只有启用捕获/比较中断。您只需要在启用计时器之前启用它。

__HAL_TIM_ENABLE_IT(&tim3, TIM_IT_UPDATE );
于 2020-04-01T15:34:14.813 回答
0

首先，您必须在启动定时器之前初始化输出引脚，如下所示：

/* USER CODE END TIM1_Init 2 */
HAL_TIM_MspPostInit(&htim1);

/* USER CODE BEGIN TIM1_Init 2 */
HAL_TIM_OC_Start_IT(&htim1,TIM_IT_CC1);

其次，您必须启动输出计时器

HAL_TIM_OC_Start_IT( &htim1, TIM_CHANNEL_1 );
HAL_TIM_Base_Start_IT( &htim1 );

你的输出引脚是这样启用的：（此代码适用于 Stm32F4xx）

GPIO_InitStruct.Pin = GPIO_PIN_9; // channel 1
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
GPIO_InitStruct.Alternate = GPIO_AF1_TIM1;
HAL_GPIO_Init(GPIOE, &GPIO_InitStruct);

我不确定您是否需要 BREAK 代码。看看参考手册中的17.3.12使用break函数

于 2020-05-04T13:54:48.027 回答
0

尝试将“TIM_IT_CC1”替换为“TIM_CHANNEL_1”。

于 2020-04-29T23:27:26.677 回答