Macro __HAL_TIM_SET_Compare does not work

Question

Trying to adjust the PWM period value using the macro

__HAL_TIM_SET_COMPARE(&htim4,TIM_CHANNEL_3,299);

but it does not work.

However the macro

__HAL_TIM_SET_AUTORELOAD(&htim4, 599);

works fine.

why the __HAL_TIM_SET_COMPARE does not work ?.

The board I am using is NUCLEO-F401RE with CUBE-MX generated project on Truestudio.

And if you enable preload register first? Saying *not working* is very strong. Is the value written to register? — unalignedmemoryaccess, Feb 22 '19 at 12:57
@tilz0r the __HAL_TIM_GET_COMPARE confirms the register value is loaded :- Current ARR=599 CRR=299 — TonyP, Feb 22 '19 at 13:33
Then macro works ok. You will need to focus to somewhere else instead. — unalignedmemoryaccess, Feb 22 '19 at 13:34
@tilz0r .. seeking help .. any lead where to look for ?, If I use HAL_TIM_ConfigChannel(...) it works fine.. but I think doing it via Macro is more elegant — TonyP, Feb 22 '19 at 17:57
Check what is different in config channel versus what you do. — unalignedmemoryaccess, Feb 22 '19 at 17:58

score 2 · Accepted Answer · answered Feb 25 '19 at 22:15

2

I had similar issues with this macro, and would opt instead for:

htim4.Instance->CCR3=299;

Supposing you want to set the capture and compare register of channel three for htim4 to 299 to modify your PWM duty cycle.

answered Feb 25 '19 at 22:15

kpg987

1 Answers1