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TeXitoi / keyberon

A rust crate to create a pure rust keyboard firmware.
MIT License
1.04k stars 79 forks source link

Enable debugging messages through the HID interface #111

Open borisfaure opened 1 year ago

borisfaure commented 1 year ago

When programming with qmk (https://docs.qmk.fm/#/), it is possible to use printf() to debug code when CONSOLE_ENABLE is set. Those messages can be read through hid_listen (https://www.pjrc.com/teensy/hid_listen.html). Could the same trick be implemented in keyberon? Do you have any pointers to do something like this when using no debugging probe? Thanks

TeXitoi commented 1 year ago

Keyberon is a library, so it doesn't enable any fancy thing. Without a probe, you can create a serial usb line, and log what you want in it. Every keyberon object should be Debug, so it should be quite easy.

TeXitoi commented 1 year ago

looks like https://github.com/rgoulter/keyboard-labs/blob/master/firmware/keyberon/src/bin/minif4-36-rev2021_1-rhs.rs use a HID and a serial usb endpoint at the same time, might be an interesting base.

borisfaure commented 1 year ago

I managed to run an example of a usb serial implementation on the chipset, as a standalone. However, I failed to have it run on the same pins as the HID implementation from Keyberon. I tried going a different way by having 2 HIDs (one for debugging) but so far, I can only make them conflict. Do you have any example of keyberon with 2 HIDs (one keyboard and one mouse for example)?

gzeronet commented 1 year ago

I managed to run an example of a usb serial implementation on the chipset, as a standalone. However, I failed to have it run on the same pins as the HID implementation from Keyberon. I tried going a different way by having 2 HIDs (one for debugging) but so far, I can only make them conflict. Do you have any example of keyberon with 2 HIDs (one keyboard and one mouse for example)?

Seems here is you need: https://github.com/dlkj/usbd-human-interface-device/blob/main/examples/src/bin/multi_device.rs#L83

Actually, I have let 2 HIDs (keyboard matrix and trackpoint module) work together on a stm32f401 board by sending usbd-human-interface-device keyboard & mouse reports to usb_device, and let mouse scroll button works on keyboard (but my code looks ugly).