STM32 Timer Output compare not working proper

Thread Starter

ep.hobbyiest

Joined Aug 26, 2014
153
I am using STM32L476 Nucleo board and cubemx. I want to use Output compare channel 1 for timeout of 2ms. i have configure the timer but timer is not giving interrupt for Output compare. i am getting interrupt for period i gives for timer. but not for output compare. Here is my timer configuration.


Code:
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);

}
i tried changing the sConfigOC.Pulse value but i don't see expected behavior.
 

MrChips

Joined Oct 2, 2009
20,914
You have not shown all of your code.
How are you testing your board?
Have you configured a GPIO pin to give an output?
Where is your interrupt handler code?
 

Thread Starter

ep.hobbyiest

Joined Aug 26, 2014
153
Hi
i am using STM32L476 and Cubemx for HAL. I want to use timer in OC mode to use as timeout. timer interrupt is working but i don't see OC mode working. i tried to use callback, intterupt but i don't see expected behaviour.
here is code link attached.
 

MrChips

Joined Oct 2, 2009
20,914
Hi
i am using STM32L476 and Cubemx for HAL. I want to use timer in OC mode to use as timeout. timer interrupt is working but i don't see OC mode working. i tried to use callback, intterupt but i don't see expected behaviour.
here is code link attached.
How are you testing your code?
How do you know that interrupt is working?
 

MrChips

Joined Oct 2, 2009
20,914
You have to be more specific.
You need to show what works and what doesn't work,
and what tools you are using to indicate working and not working, i.e. oscilloscope, LED, voltmeter, simulator, debugger, etc.

I can help you with this if you were to follow through in a more timely fashion.
 
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