This also improves Palette so it stores the original RGB888 colors.
Lastly, it adds I2CDisplay as a display bus to talk over I2C. Particularly
useful for the SSD1306.
Fixes#1828. Fixes#1956
I designed this really tiny, minimalist font for use on very small
displays. On uGame it lets one see the whole text that CircuitPython
prints on boot. The characters are 4x6 pixels each, and they are
optimized for legibility (large x-height, right angles, blocky shapes).
It might make sense to also use that font in other boards.
This started while adding USB MIDI support (and descriptor support is
in this change.) When seeing that I'd have to implement the MIDI class
logic twice, once for atmel-samd and once for nrf, I decided to refactor
the USB stack so its shared across ports. This has led to a number of
changes that remove items from the ports folder and move them into
supervisor.
Furthermore, we had external SPI flash support for nrf pending so I
factored out the connection between the usb stack and the flash API as
well. This PR also includes the QSPI support for nRF.
Some boards (like the uGame10) may want to have their own set of extra
modules. This change lets them override EXTRA_BUILTIN_MODULES in their
mpconfigboard.h and makes the ugame10 board do that.
This introduces a new spi_flash_api.h that works for both SPI and
QSPI. The previous spi_flash functions are now called external_flash
to minimize confusion.
There have been multiple uGame prototypes with differences in the pins
and other details. This updates the board definition to fit the final
uGame 10 design.
