ChibiOs

[litezxc]

Hi, ChibiOs is empty, what to fill with?

[elagil]

Make sure to clone submodules with git submodule update --init --recursive

[litezxc]

yes, blackpill :)

stm32f401xB/C ID 0x423 flash 256kb CPU Cortex-M4
The problem is with the device initialization; it does not appear when connected :)

[elagil]

Blackpill uses a 25 MHz oscillator, not 24.576 MHz. So I expect that the USB clock is wrong (must be very close to 48 MHz) - or some other hardware difference.

[litezxc]

ok. thank u

[elagil]

I am sure https://github.com/blus-audio/firmware-rs can be adapted to the hardware with little effort. I will make a firmware for you to test at some point, but expect some delay.

Just follow this issue blus-audio/firmware-rs#1
I will need your assistance for testing, I don't have this hardware.

[litezxc]

You are magic man!

[litezxc]

I downloaded the latest release in hex format and uploaded default_firmware.hex, but the new device did not appear. :(

[litezxc]

It's fun 💯