1 Activate LPTIM in STM32Cube
1. Detailed explanation of LPTIM timeout interrupt
The library functions used are:
HAL_StatusTypeDefHAL_LPTIM_TimeOut_Start_IT(LPTIM_HandleTypeDef *hlptim, uint32_t Period,uint32_t Timeout)
The calculation formula of timing time:
/* Timeout = (Compare + 1) / LPTIM_Clock
Timeout = (Period + 1) / LPTIM_Clock
LPTIM_Clock: Low Power Timer Clock: in CUBU software
Select the clock you want to use for calculations. For example: 16Mhz
Timing 1s: 1s=(Period+1)/16000000
The interrupt function used is:
/**
*@brief Compare match callback in nonblocking mode
*@param hlptim : LPTIM handle
* @retval None
*/
void HAL_LPTIM_CompareMatchCallback(LPTIM_HandleTypeDef*hlptim)
{
/*Timeout was reached, turn on LED2 */
//Write the interrupt service function here
}
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