About FredS

FredS · 2024-07-05

Hallo everyone,Since some time I struggle to get DMA access working on a STM32H723. I was pointed out this MCU is a complicated beast, but I would at least expect sensible, coherent documentation for it.When I look at page 683, I see:on next pag...

FredS · 2024-06-11

Hallo everyone,As engineer who started to explore the world of MCU's years after my retirement, I regularly encounter problems that puzzle me for some time. However, since I'm stuck for several days now, I decided to ask for assistance by this forum....

FredS · 2024-05-10

Hallo,I needed more performance for my project, so I replaced my STM32F401 Blackpill by a WeAct STM32H723VGT6 board. I adapted my HW to accomodate the different layout of the H723 board and modified my application where needed because differences in ...

FredS · 2024-04-09

Hallo everyone,As a relative newbe in the world of MCU programming, I am wrestling go get my application running. The origin of the errors is unclear, although I have the impression it is related to conflicts of peripherals or time. I still use CUBEI...

FredS · 2024-03-28

Hallo everyone,Before I encountered a bug in an USB_OTG_FS library function (see previous post), I struggled to find out when the function 'CDC_Transmit_FS(uint8_t* Buf, uint16_t Len)' has finished, meaning the content of the 'Buf' argument is compl...

FredS · 2024-07-09

Hallo Jacky,All over sudden it is very busy around this topic.To answer you question: arriving on page 4 of RM0533, I already had so many questions and uncertainties, I decided to stop reading further for this moment. When things are not clear and I ...

FredS · 2024-07-09

Hallo Jacky,Please look back, the version differences were stated by Jan Waclawek. I even didn't have seen that RM before.Greetings, Fred

FredS · 2024-07-09

Hallo Jan,It looks like there has changed a lot more than you pointed out: Revision 3 of RM0433 shows chapter 16.4.3 on page 630, while Revision 6 shows chapter 15.6.3 on page 671.Greetings, Fred

FredS · 2024-07-09

Dear Jan,As many times before, thank you for your reply. It is really a gotcha that a firm as ST doesn't manage to produce descriptive and coherent documentation.I will need some time to translate/interpret the example for the 'USB OTG register...

FredS · 2024-07-09

Hallo Jacky,Thank you for your reply and clarification. I think I understand the issues you explained, confiming the chosen method is a matter of taste.However, you didn't reply on the second part of my question: how should I specify a DMAMUX r...

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Confusion on DMAMUX registers in RM0468

SPI DMA request triggered by Timer-compare

HW or SW issue?

Readout external ADC by SPI doesn't work correctly

How to get callback 'CDC_TransmitCplt_FS(.......)' invoked

Re: Confusion on DMAMUX registers in RM0468

Re: Confusion on DMAMUX registers in RM0468

Re: Confusion on DMAMUX registers in RM0468

Re: Confusion on DMAMUX registers in RM0468

Re: Confusion on DMAMUX registers in RM0468