How does the tinyusb host stack work?

[MCube99]

Hello all, just a question on how the tuh_stack works for tinyusb, since I have no idea how it gets its event and populates it with values(especially the rhport stuff). How does it get the events stuff is my main Q

[cleverca22]

https://github.com/librerpi/lk-overlay/blob/master/platform/bcm28xx/dwc2/dwc2.c

this is a dwc2 host mode driver i wrote for the pi1-pi3 family

hcd_init() gets called by tinyusb to bring the controller online, that initializes things and enables the IRQ handler

when the irq handler detects a device detecting, it calls hcd_event_device_attach() to tell tinyusb that a device is ready to enumerate

tinyusb will call hcd_edpt_open() for each endpoint its opening
and hcd_edpt_xfer() to do an actual transfer
the irq handler should then run hcd_event_xfer_complete() when a transfer is complete