About STsch.1

STsch.1 · 2022-01-24

Hi,From the errata sheet I have seen, that the STM32F7x2 has a problem with the cache in write through:Errata:https://www.st.com/resource/en/errata_sheet/es0360-stm32f72xxx-and-stm32f73xxx-device-limitations-stmicroelectronics.pdfDatasheet:https://ww...

STsch.1 · 2022-01-21

Hi,I have seen, that for the bootloader with just one image, it is only possible to use the YMODEM with UART for updating the firmware with the SBSFU. Now what I'm am concerned about is, that the YMODEM seems not to be very error tolerant. So, what f...

STsch.1 · 2022-01-20

Hi,I have a bit trouble understanding the two keys in the SBSFU and which pairs is actually used. From AN5056, chapter 5 there is stated how to generate the two different methods and the AES key I could successfully adjust. With the ECCKEY method and...

STsch.1 · 2022-01-11

Hi,When I have a look at the AN5056(https://www.st.com/resource/en/application_note/dm00414677-integration-guide-for-the-xcubesbsfu-stm32cube-expansion-package-stmicroelectronics.pdf), there is a possibility on page 39 to improve the boot time. That ...

STsch.1 · 2022-01-11

Hi,I try to use the SBSFU in a project with a STM32F722 and so far it works to flash an initial firmware. Now what I would like to do is to update the firmware and for that, since I can only use one image because of the limited flash size, I corrupt ...

STsch.1 · 2022-01-24

Ah ok, thank you. So that is the reason I have no CRC errors there. So this problem from the errata sheet does only apply, when the core uses the SRAM1 and not when I use DTCM only?

STsch.1 · 2022-01-24

Ok, thank you for your answer. The strange thing is, that I don't have this for the DTCM, but only for the SRAM1? I also check always for the DMA_Callback to ensure, that the DMA finished the writing, so this should not behave like that.So if it is a...

STsch.1 · 2022-01-21

Ok, thank you jocelyn, that is exactly what I wanted to know. So this is fully safe then.

STsch.1 · 2022-01-21

Hi Arno, thank you for your response.Yes it checks the firmware header, but what if the CRC is correct of one of the packages from the YMODEM protocol and there are still some corrupt bits somewhere in this package (since it is only CRC16). Can the b...

STsch.1 · 2022-01-21

Ok, it was indeed my mistake, I commented out too much code. Thank you.

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STM32F7 data corruption when using SPI with DMA in SRAM1 instead of DTCM

YMODEM for SBSFU safe enough?

SBSFU - ECCKEY and AES Key

SBSFU - Improve boot time not working

SBSFU - flash erase 0x0000 instead of 0xFFFF

Re: STM32F7 data corruption when using SPI with DMA in SRAM1 instead of DTCM

Re: STM32F7 data corruption when using SPI with DMA in SRAM1 instead of DTCM

Re: YMODEM for SBSFU safe enough?

Re: YMODEM for SBSFU safe enough?

Re: SBSFU - Improve boot time not working