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Riscy00_UPP
Riscy00_UPP
Associate II
May 5, 2023
Solved

STMBW55 LPTIM1 PWM Mode Continuous is working but no interrupt

Attached is the IOC setup for simple continuous PWM Mode from LPTIM1 from STM32BW55 (all Cube IDE/MX updated with the library, etc).. RB2 showing the waveform as per Peroid and Pulse width (from 64MHz clock input) but I get no interrupt (enabled by IOC setting). I have looked thro the documents and could not find something useful. Have I missed something?

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Riscy00_UPP
Riscy00_UPPBest answer
Associate II
May 5, 2023

This HAL_LPTIM_TriggerCallback() interrupt would not work due to a Software Trigger, so I replace it with HAL_LPTIM_AutoReloadMatchCallback() and it worked fine.

Sorry to bother you, you can close it.

BTW: The documentation for LPTIM is a mess, no guidelines when using CubeMX, demo code there is out of date. Too much what and too little how.

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Riscy00_UPP
Riscy00_UPPAuthorBest answer
Associate II
May 5, 2023

This HAL_LPTIM_TriggerCallback() interrupt would not work due to a Software Trigger, so I replace it with HAL_LPTIM_AutoReloadMatchCallback() and it worked fine.

Sorry to bother you, you can close it.

BTW: The documentation for LPTIM is a mess, no guidelines when using CubeMX, demo code there is out of date. Too much what and too little how.

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