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TallMike · 2024-10-15

We're running into a really weird situation with a bootloader that copies some code into ITCM. The bootloader initializes various peripherals and clocks and then copies data from the QSPI flash to both the SRAM and to the ITCM memory. Then we use t...

TallMike · 2024-09-18

Hi, I'm working on a bootloader for a board using the STM32H750IB (the Electro-Smith Daisy Seed), and have a few questions about what all needs to be done before jumping to the main image.The main image (a flat '.bin' file) is stored in a QSPI flash...

TallMike · 2024-07-05

Hi, We've been using a board (the Daisy Seed) that has an STM32H750IB and external QSPI flash chip.We're having an issue with some of the boards somehow getting into a persistent (across reset. power cycle, and chip erase) state whereby the SCB_Enabl...

TallMike · 2024-10-16

Thanks for the info! And wow! One other question: does this also happen when writing to SRAM? We are also copying to SRAM. Does it have the same issue as well? I didn't get a chance to do a test for that.

TallMike · 2024-10-15

Is this an actual valid solid solution? I would be worried that it does other unexpected things too unless this is a known issue?

TallMike · 2024-10-15

Right, sorry, here's the part number:;STM32H750IB And correct, it's not a per-se bootloader issue, it's a System Reset issue,And yes your understanding is correct: the last byte (e.g. the 10th) will get modified.

TallMike · 2024-07-24

Just to follow up: It appears that the EnableDCache was a Red Herring and the real issue appears to be with the QSPI flash sometimes randomly getting set to Write Protect mode due to some tweaky startup/GPIO timing.

TallMike · 2024-07-15

A few responses:For doing the testing, we were doing a full power cycle (unplugging the USB cable), both quickly and with several seconds between, and sometimes several hours or overnight.The code is being run directly from the Internal FLASH.Here's ...

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last-written byte of ITCM apparently getting modified by NVIC_SystemReset();

working on a bootloader for the STM32H750IB, and have questions, esp about SCB->VTOR

STM32H750IB getting into persistent problem with SCB_EnableDCache

Re: last-written byte of ITCM apparently getting modified by NVIC_SystemReset();

Re: last-written byte of ITCM apparently getting modified by NVIC_SystemReset();

Re: last-written byte of ITCM apparently getting modified by NVIC_SystemReset();

Re: STM32H750IB getting into persistent problem with SCB_EnableDCache

Re: STM32H750IB getting into persistent problem with SCB_EnableDCache