…flash space.

2. Add flag INTERNAL_LIBM to mpconfigboard.mk files to signal using lib/libm.
3. Fix floating-point warnings in lib/libm
4. Turn off -finline-limit, no longer needed due to 1.
5. Add explicit flags for SPI_FLASH_FILESYSTEM and INTERNAL_FLASH_FILESYSTEM
to mpconfigboard.mk files, so they don't need to know the name of the .c file
that implements those. Makefile takes care of checking the flags and including
the right files.

adafruit#325 (comment)

appropriately to match board capabilities.

It used to introduce extra clocks to the bus rather than changing the
value output.

This fixes SD cards.

esp8266: Actually disable pins when reset on reload.

esp8266: Correct SPI functionality when write_value is provided.

For ESP8266, remove frozen module neopixel.py and add neopixel_write to mpconfigport.h. Use  [Adafruit_CircuitPython_Neopixel/neopixel.py](https://github.com/adafruit/Adafruit_CircuitPython_NeoPixel) instead.

If a soft reset happens while the gamepad module is scanning for button
presses, there is a moment when the pins get de-initialized, but the
gamepad module is still trying to read them, which ends in a crash.
We can avoid it by disabling scanning on reset.

…ith an 8Mbyte chip) (micropython#355)

Add supersized (8Mbyte SPI flash) FeatherM0Express support

…buffer of at least 1. (micropython#370)

Fixes micropython#358

…poll for existence.

This is a board definition for the uGame project:
https://hackaday.io/project/27629-game

uGame is a small handheld game console programmable with
CircuitPython. The hardware part of the project is pretty
much stable by now.

This is mostly for convenience, so that user code doesn't
need to add additional checks.

Also, bring the bitbangio into compatibility with busio wrt. empty
buffers.

…d-write

Allow empty reads and writes for busio.SPI

enable framebuf for ESP8266

…mpiled output.

Fix round().

This is a C module with some low-level functions required for the
CircuitPython "stage" library. It provides support for fast
rendering of tile grids and sprites on SPI-based RGB displays.

This makes it different from the bootloaders and Arduino.

Fixes micropython#324.

atmel-samd: Update Feather M0 Express USB PID in 2.x

micropython#427)

Update info about erasing CIRCUITPY to include flash erasers for non-Express boards.

Initially this library assumed the display is rotated by 90 degrees, so
the x and y were swapped. I'm now handling the display rotation in the
driver, with the hardware display settings, so the library should use
a sane order of x and y. This way it will work with any display
orientation.

Fix display orientation for _stage module

…n_libs

update CPX frozen modules to latest versions

The example code for the gamepad module would skip detected
button presses in the code that waits for a button to be released,
because it would run it even when no button is pressed.

Also updated the example pin names to not use RX and TX.

Fix example for gamepad

)

… boards

Itsybitsy m0 fixes

memory type for alt flash fix

…tstar LED + IR Receiver

pIRKey tested w/ hardware

Unless I have misunderstood something design guide should have matching the definition with [Unified Sensor Driver](https://github.com/adafruit/Adafruit_Sensor/blob/master/Adafruit_Sensor.h#L111).

Magnetometer values are also 3d vector of uT

aren't super dim. This will make status NeoPixels a bit bright
but one can use samd.set_rgb_status_brightness() to dim them.

… its unavaialable.

…s_brightness

Increase the status LED brightness a bit so that newer DotStars

…ython.

This fixes micropython#345 and fixes micropython#215.

Delete out of date docs, drivers and examples

…bsolete_drivers

Remove obsolete peripheral drivers in esp module