STM32F401 bootloader

[sandmix]

Is this bootloader available for 401 series ? Thanks

[stevstrong]

Unfortunatelly coulöd´t finish it yet.
But any support is welcome :).

[sandmix]

I'm still learning it, for now my skills wouldn't be enought, wanted to know what's the benefit of this bootloader compared to STM32_HID_Bootloader

[stevstrong]

Well the main difference is the underlying protocol, which makes it a bit more universal.
But the upload speed is approximately same.

[sandmix]

I was thinking it uses almost the same protocol and it detects also as HID. Maybe you have something for 401 so I can start from there or there is nothing for it ?

[stevstrong]

I was planning to program a simplified USB driver for F4 family as the existing one is not very efficient.
But I do not have anything in usable form, it is all in development phase without any description yet.

[sandmix]

Simplified you mean HID ? I star analizing info from here Serasidis/STM32_HID_Bootloader@7a23820
maybe it will help.

[stevstrong]

No, simplified I mean almost bare metal, the HAL drivers are pretty bloated and it is hard to understand the concept behind.
But you could try to use it.

[sandmix]

if you have some code for F4 I can try to look into it, already checked hid bootloader and weact one. could make weact working with hid-flash changed vid and pid but it stops:

[1209:BEBA] device is found !
Sending command...
Flashing firmware...
. 1024 Bytes