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Scott Shawcroft 360475e266
Implement audiobusio and enhance PIO for it 
This adds I2SOut and PDMIn support via PIO.

StateMachines can now:
 * read and read while writing
 * transfer in 1, 2 or 4 byte increments
 * init pins based on expected defaults automatically
 * be stopped and restarted
 * rxfifo can be cleared and rxstalls detected (good for tracking when
   the reading code isn't keeping up)

Fixes #4162
 		2021-02-23 15:50:00 -08:00
..
bindings/rp2pio Implement audiobusio and enhance PIO for it 2021-02-23 15:50:00 -08:00
boards Merge pull request #4228 from ZodiusInfuser/rp2040-boards 2021-02-23 10:00:19 -08:00
common-hal Implement audiobusio and enhance PIO for it 2021-02-23 15:50:00 -08:00
peripherals Add initial RP2040 support 2021-01-20 19:16:56 -08:00
sdk@55346c9530 Update to the very latest SDK w/GP15 restore 2021-02-05 18:44:06 -08:00
sdk_config/pico Add initial RP2040 support 2021-01-20 19:16:56 -08:00
supervisor Implement audiobusio and enhance PIO for it 2021-02-23 15:50:00 -08:00
.gitignore Add initial RP2040 support 2021-01-20 19:16:56 -08:00
Makefile raspberrypi: implement os.urandom 2021-02-17 17:49:25 -06:00
README.rst Add initial RP2040 support 2021-01-20 19:16:56 -08:00
audio_dma.c Implement audiobusio and enhance PIO for it 2021-02-23 15:50:00 -08:00
audio_dma.h Add PWM based audio playback 2021-02-09 15:38:33 -08:00
background.c Update to the very latest SDK w/GP15 restore 2021-02-05 18:44:06 -08:00
background.h Add initial RP2040 support 2021-01-20 19:16:56 -08:00
bs2_default_padded_checksummed.S Update to the very latest SDK w/GP15 restore 2021-02-05 18:44:06 -08:00
fatfs_port.c Add initial RP2040 support 2021-01-20 19:16:56 -08:00
link.ld Update to the very latest SDK w/GP15 restore 2021-02-05 18:44:06 -08:00
mpconfigport.h Add PWM based audio playback 2021-02-09 15:38:33 -08:00
mpconfigport.mk Implement audiobusio and enhance PIO for it 2021-02-23 15:50:00 -08:00
mphalport.c Add initial RP2040 support 2021-01-20 19:16:56 -08:00
mphalport.h Add initial RP2040 support 2021-01-20 19:16:56 -08:00
qstrdefsport.h Add initial RP2040 support 2021-01-20 19:16:56 -08:00

README.rst 

RP2040
==================

This port supports many development boards that utilize RP2040 chips. See
https://circuitpython.org/downloads for all supported boards.


Building
--------

For build instructions see this guide: https://learn.adafruit.com/building-circuitpython/


Port Specific modules
---------------------

.. toctree::
    ../../shared-bindings/rp2pio/index