Support for STM OTG_FS core present in STM32F4xx (and higher) series microcontrollers

thousandeyes-fwieland commented 4 years ago

Eg. the STM32F446xx family has OTG_FS and OTG_HS cores which can function both as peripheral and host (for USB OTG). I would like to be able to use this crate with the OTG_FS core in peripheral mode. I can help with the implementation, but will need some pointers on where to start.

I'm currently trying to find out more about the OTG_FS core itself.

TeXitoi commented 4 years ago

There is a WiP here: https://github.com/Disasm/stm32f429-usbd-fs

Disasm commented 4 years ago

I think that driver for OTG_FS&HS should live in a different crate for multiple reasons:

These peripherals are completely different and require different device-specific parameters
OTG_FS peripheral is present not only in STM32, but also in GD32VF103. I'm going to rename stm32f429-usbd-fs into something like synopsys-usb

@thousandeyes-fwieland Feel free to join stm32f429-usbd-fs development. At the moment, that driver works for STM32F429 and STM32F401 MCUs, but there are a lot of things to do:

Separating the driver code from the hal libraries in the same way as it done in stm32-usbd.
Replacing hs/fs features with configuration flag. Ideally, user should be able to use this driver for both HS and FS peripherals at the same time (F429 has both).
Fix stm32-rs patch set to support more devices.
Investigate the differences between F429 and the other F4xx with the updated USB OTG IP (for example, F413). Add support for these chips.

TeXitoi commented 4 years ago

@Disasm you make it work on GD32VF103?

Disasm commented 4 years ago

@TeXitoi I tried to plug this library in for GD32VF103, but it didn't work out of the box. I'm planning to add GD32VF103 support anyway.

Disasm commented 4 years ago

Closing the issue as synopsys-usb-otg was released and a lot of problems solved since then.

stm32-rs / stm32-usbd

Support for STM OTG_FS core present in STM32F4xx (and higher) series microcontrollers #19