About martin.k

martin.k · 2019-04-01

Hell ST community!I have made a board with an STM32H743ZI MCU on it. It has connections to pins where serveral USART peripherals sit (without pull-ups) and uses USB FS on PA9 to PA12.My problem is that the DFU bootloader does not show up via USB. If ...

martin.k · 2016-12-16

Posted on December 16, 2016 at 20:15Hello experts.Currently I experience a very strange problem with my firmware for a STM32F334.I just switched from the debug configuration to release, uploaded the code to the device and it behaves totally differen...

martin.k · 2015-01-03

Posted on January 03, 2016 at 15:27Hi,i recently ran into a problem with a FOC SDK 4.2 base motor control project.After assembling a project for Eclipse AC6 (API sources + EWARM library from web edition) I got usage faults during the execution of a ...

martin.k · 2019-04-05

It's okay. You already helped me a lot.For now im okay with writing a custom bootloader. By using that DFU application example it wouldn't be so much effort, I think.

martin.k · 2019-04-04

And the question remains: Why does it work when I do a "System Reset" with the STlink software. Where is the difference to a "NVIC_SystemReset" call and a "Power-on reset"?Ohh, and executing that software reset from my firmware with a connected debug...

martin.k · 2019-04-04

I do know HSE is off by default and the RCC will be de-initialized before it is used. This is how the code is generated by CubeMX and I wouldn't expect it to be different in the bootloader.However, it does not explain why it's not working...According...

martin.k · 2019-04-04

It's a really weird problem... At least I made a little progress:Frist of all, I've measured that start up delay. It's between 2 and 3ms, if the HSE starts. I say "if it starts", beacause the bootloader obviously does not enable it.If I power on with...

martin.k · 2019-04-01

Ugh... This is really hard to say. It's an 25 MHz crystal from Abracon: ABM3-25.000MHZ-D2Y-T with 18pF load capacitors.Do you think TIM17 measures the wrong frequency, due to a longer startup delay? But, shouldn't this wait for stable conditons? And ...

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Why STM32H743ZI DFU bootloader does not come up?

Code compiled as Release behaves different than Debug code

FOC SDK 4.2 clearing thumb mode with Eclipse AC6

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Re: Why STM32H743ZI DFU bootloader does not come up?

Re: Why STM32H743ZI DFU bootloader does not come up?

Re: Why STM32H743ZI DFU bootloader does not come up?