Solved
LPTIM2 Pulse Counter
On NUCLEO-H563ZI board I put 3KHz square wave on LPTIM2_ETR (PC4). I want LPTIM2 to continuously count. However the count never increases. LPTIM2 setup...
And
Clock looks like
MX_LPTIM2_Init() looks like
static void MX_LPTIM2_Init(void)
{
/* USER CODE BEGIN LPTIM2_Init 0 */
/* USER CODE END LPTIM2_Init 0 */
/* USER CODE BEGIN LPTIM2_Init 1 */
/* USER CODE END LPTIM2_Init 1 */
hlptim2.Instance = LPTIM2;
hlptim2.Init.Clock.Source = LPTIM_CLOCKSOURCE_ULPTIM;
hlptim2.Init.Clock.Prescaler = LPTIM_PRESCALER_DIV1;
hlptim2.Init.UltraLowPowerClock.Polarity = LPTIM_CLOCKPOLARITY_RISING;
hlptim2.Init.UltraLowPowerClock.SampleTime = LPTIM_CLOCKSAMPLETIME_DIRECTTRANSITION;
hlptim2.Init.Trigger.Source = LPTIM_TRIGSOURCE_SOFTWARE;
hlptim2.Init.Period = 65535;
hlptim2.Init.UpdateMode = LPTIM_UPDATE_IMMEDIATE;
hlptim2.Init.CounterSource = LPTIM_COUNTERSOURCE_EXTERNAL;
hlptim2.Init.Input1Source = LPTIM_INPUT1SOURCE_GPIO;
hlptim2.Init.Input2Source = LPTIM_INPUT2SOURCE_GPIO;
hlptim2.Init.RepetitionCounter = 0;
if (HAL_LPTIM_Init(&hlptim2) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN LPTIM2_Init 2 */
/* USER CODE END LPTIM2_Init 2 */
}Startup looks like
...
MX_LPTIM2_Init();
/* USER CODE BEGIN 2 */
...
HAL_LPTIM_Counter_Start(&hlptim2);
...Following HAL_LPTIM_Counter_Start() CR = 0x5 and and CFGR = 0x800001. But CNT is zero. Same result if I use alternate ETR PE0.
What is missing?
