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rp2350: native tinyusb host mode#10652
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This PR adds the ability to use both CIRCUITPY_USB_DEVICE=0 and CIRCUITPY_USB_HOST=1 on raspberrypi rp23xx boards to indicate that the native usb pins DP/DM should be configured in HOST mode using the TinyUSB stack.
TinyUSB does not properly handle non-pio RP2350 host mode though so this PR doesn't currently enable the desired functionality. There is an un-merged TinyUSB PR (hathach/tinyusb#2474) which may be applicable to the problem but doesn't solve the problem in it's current state.
The recent usb/core/Device.c logic and memory updates have also changed the TinyUSB behavior but I haven't spent enough time to understand what the impacts are.
I've also included the board files for the Olimex RP2350pc as it's one of the boards that would benefit from this capability and I thought people might like to see how the feature would be configured. however if there's interest in applying the core changes before the TinyUSB issues have been resolved I can drop those files from the PR.