About JWilk.1

JWilk.1 · 2020-11-21

Hello,I am measuring execution time of a function that operates with floating point numbers and noticed that it is more than I expect. I am using Nucleo F429ZI, clock is configured to the 50 MHz. For measuring the execution time I use TIM6 configured...

JWilk.1 · 2020-06-23

Hello,I am observing a strange behaviour of the first few PWM pulses after a change in duty cycle. I use HAL_TIM_PWM_Stop, HAL_TIM_ConfigChannel (with the changed Pulse) and then HAL_TIM_PWM_Start. What happens is that for around 1 millisecond the ...

JWilk.1 · 2020-11-22

I also agree that this is the finest method. However, due to the current situation (COVID, quarantine) I don't have an oscilloscope near at hand.

JWilk.1 · 2020-11-22

Thanks to all of you for the quick responses.I missed the fact that the prescaler value is preloaded. So after configuring the prescaler I added: TIM6->EGR = TIM_EGR_UG;And the counter was showing 0. After removing the prescaler at all, I got CNT of ...

JWilk.1 · 2020-06-24

Hello,I used pin C9 on a different hardware. Today I tested on a Nucleo board as you suggested and there the pin that was multiplexed for TIM3 CH4 is B1 (I wanted to keep the demo application without many changes). As for the "test point", I meant t...

JWilk.1 · 2020-06-24

Sorry, only one picture got uploaded. Here is the picture when the PWM is stopped before changing the duty.

JWilk.1 · 2020-06-24

Hello Jan,The problem happens with 50% duty cycle as well. I have run it on a STM32F429ZI Nucleo-144 board. What I did is to modify the project provided by ST (Projects/STM32F429ZI-Nucleo/Examples/TIM/TIM_PWMOutput) and modified the code by adding t...

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Performance of floating point operations of F429

Strange behavior of PWM

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