About Russeree

Russeree · 2024-01-09

I have a few questions about the DFU mode on the STM32F723. My goal is to enable users to flash a binary file to the MCU via a USB connection. My implementation is that i placed a 22uF capacitor on the boot0 pin then tied another IO pin (EO) in this ...

Russeree · 2021-05-17

Currently working on a Bitcoin hardware wallet on the STM32F7 Discovery platform. I wanted to use the cryptographic library to secure information stored in the EEPROM as well as perform hashing functions. VFP is not supported in libSTM32Cryptographic...

Russeree · 2019-09-10

Hey guys/gals, I have a UART TX and DMA issue, I can't call HAL_UART_Transmit_DMA sequentially in the same functions, the first call is successful but the UART gstate gets stuck in the TX_BUSY state so a second call fails to execute. Heres some detai...

Russeree · 2024-01-11

Thanks so much you inspired me to build it! And it does support USB 2.0 High Speed. I open sourced it too! https://github.com/russeree/nyan-keys-dfu-bootloader/tree/master

Russeree · 2024-01-09

Sorry to double post, but before I go down this rabbit hole, is it possible to flash the EEPROM at runtime? Could I just write a small DFU compatible program? Run it then flash over the top of the existing memory and reset with the NVIC?

Russeree · 2024-01-09

Wow... Absolutely an amazing catch. Yeah I didn't realize that there were 2 distinct PHY output pins for USB OTG Full Speed and USB High Speed. I guess my next step is to write some sort of alternative DFU compatible state for my device that enables ...

Russeree · 2021-05-17

Found the solution for F7 users. Download patch 3.1.3 for the crypto lib and use the libraries for the H7 series chip. The lib you are looking for is 'STM32CryptographicV3.1.3_CM7_GCC_ot_fpu.a'

Russeree · 2019-09-10

EDIT: Please see my response below, I didn't know that the admins disabled the ability to delete a post.

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STM32F723 DFU Mode - Questions

Cryptographic Library VFP support on STM32F7

Sequential calls to HAL_UART_Transmit_DMA Unexpected Behavior.

Re: STM32F723 DFU Mode - Questions

Re: STM32F723 DFU Mode - Questions

Re: STM32F723 DFU Mode - Questions

Re: Cryptographic Library VFP support on STM32F7

Re: Sequential calls to HAL_UART_Transmit_DMA Unexpected Behavior.