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How to make a 1 us interrupt timer in stm32f103?

Hello, i want to make a 1 us interrupt timer in for my stm32f103 in timer 2, i could make 10 us n 5 us, but in lower than that its not working truely! what should i do?!

/* TIM2 init function */
static void MX_TIM2_Init(void)
{

  TIM_ClockConfigTypeDef sClockSourceConfig;
  TIM_MasterConfigTypeDef sMasterConfig;
	
  htim2.Instance = TIM2;
  htim2.Init.Prescaler = 0;
  htim2.Init.CounterMode = TIM_COUNTERMODE_UP;
  htim2.Init.Period = 359;
	
  htim2.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
  htim2.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;
  if (HAL_TIM_Base_Init(&htim2) != HAL_OK)
  {
    _Error_Handler(__FILE__, __LINE__);
  }

  sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_INTERNAL;
  if (HAL_TIM_ConfigClockSource(&htim2, &sClockSourceConfig) != HAL_OK)
  {
    _Error_Handler(__FILE__, __LINE__);
  }

  sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
  sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
  if (HAL_TIMEx_MasterConfigSynchronization(&htim2, &sMasterConfig) != HAL_OK)
  {
    _Error_Handler(__FILE__, __LINE__);
  }

}

it's workin with this for 5 us.

Parents
  • If I want to travel at 125mph, it is not realistic to expect to be able to do that on a bicycle.

    Given your clock setup, the timer functionality, how fast your code executes, etc - is it realistic to expect to get 1us? Or is that just too fast to be realistic.

    You do the maths ...

    Again, this has little or nothing to do with Keil or ARM - it is down to the specifics of the ST chip.

Reply
  • If I want to travel at 125mph, it is not realistic to expect to be able to do that on a bicycle.

    Given your clock setup, the timer functionality, how fast your code executes, etc - is it realistic to expect to get 1us? Or is that just too fast to be realistic.

    You do the maths ...

    Again, this has little or nothing to do with Keil or ARM - it is down to the specifics of the ST chip.

Children