STM32 MCUs products

LPTIM interrupt can't wake STM32u5 from STOP low power mode

I am trying to us the LPTIM low power timer to trigger interrupts intermittently while the MCU is in STOP2 mode, but I am unable to do so. I am testing the interrupts by toggling a GPIO pin and checking the output on a scope.Without STOP mode I see t...

How to use LPTIM_TimeOut for a simple one-shot delay ?

I'm trying to realize some simple timings/delays in my application using the LPTIM, and although most of it is working, I don't understand it 100%.So the LPTIM is set up to run on the LSE clock (32768 Hz) (with a prescaler of 16, so the LPTIM is runn...

Quad encoder user input using interrupts (LPTIM)

I'm attempting to use a quad encoder as user input. It is connected to the LPTIM1, so I was going to use the HAL functions with encoder mode. I want to be able to sense both the direction and amount of turn of the encoder in order to move selection ...

I am using STM32G0 MCU in a new project. I would like to know if is possible to use a LPTIM in free running mode and read the counter value just like a time stamp. I intented to use the reading for measuring the time between two isrs. BR Gilberto

Sometimes LPTIM2 does not start when using one shot mode. I see this happened 4 years ago to another user and their question went unanswered. So I'll try. (STM32L4R5ZIT6)

// Code to start the one shot timer void set_delta_alarm(Long t) { LL_LPTIM_Enable(LPTIM2); while (0 == LL_LPTIM_IsEnabled(LPTIM2)) ; LL_LPTIM_SetAutoReload(LPTIM2, t); // * TE_SECOND / ONE_SECOND); LL_LPTIM_ClearFLAG_ARRM(LPTIM2); LL_LPTIM_Star...

ulrta low power 4 channel pulse counter

HiI would like to design an ultra low power pulse counter based. The LPTIM is the best option. However, my application require's 4 channels. Is there anyway to achive this with the STM32?BRGilberto

It is possible to use LPTIM to capture external pulse duration? I am using a SMT32L452 micro-controller

It is possible to use LPTIM to capture external pulse duration? I am using a SMT32L452 micro-controllerI think it is possible but I can't find hal for:Start lptim to capture external edgecallback functioncorrect setup on cube mx

LPTIM fires unexpected CMPM interrupts

I struggled with the CMPM interrupt and made a small test programm to reproduce the bug.To see whats going on I use an oscilloscope with 2 GPIO pins called A and B.​Pseudo Code:​LPTIM_IRQHandler() { setGpioA; clearFlag_CMPM; resetGpioA; } ​ main()...

The match interrupt on LPTIMx->CCRx is triggered when LPTIMx->CNT > LPTIM->CCRx - not on equal (=) as one might expect

On the STM32U5xx, ST decided to keep this interpretation of "match". It is present on other chips as well, see https://community.st.com/s/question/0D53W000004J0srSAC/stm32l0-lptim-generating-random-compare-match-interrupt-when-changing-compare-match-...