WIP: add sphinx docs

audio docs copypasted from moon2's work

docs/Makefile

+# Minimal makefile for Sphinx documentation
+#
+
+# You can set these variables from the command line, and also
+# from the environment for the first two.
+SPHINXOPTS    ?=
+SPHINXBUILD   ?= sphinx-build
+SOURCEDIR     = .
+BUILDDIR      = _build
+
+# Put it first so that "make" without argument is like "make help".
+help:
+	@$(SPHINXBUILD) -M help "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)
+
+.PHONY: help Makefile
+
+# Catch-all target: route all unknown targets to Sphinx using the new
+# "make mode" option.  $(O) is meant as a shortcut for $(SPHINXOPTS).
+%: Makefile
+	@$(SPHINXBUILD) -M $@ "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)

docs/badge/badge_link.rst

+.. _Badge Link:
+
+Badge Link
+==========
+
+Badge Link is a protocol for digital communication over the 3.5mm ports.
+
+You can configure individual pins (tip, ring) of each of the two 3.5mm ports
+(line in, line out) to be used as TX or RX for UART, at any baud rate up to
+5mbit in theory. In practice lower baud rates are recommended to avoid data
+corruption.
+
+MIDI can be used by configuring the baud rate to 31250. There is no galvanic
+isolation, but there are current limiting resistors.
+
+The input protection can handle between +5v and -3v.
+
+For the micropython badge link API, see the :ref:`badge_link<py_badge_link>` API docs
+

docs/badge/hardware_specs.rst

+Hardware Specs
+==============
+
+* ESP32-S3 SoC
+   * 240MHz
+   * 8MiB SPI RAM, 512KiB SRAM
+   * 16MiB flash
+   * WiFi (2.4GHz, b/g/n)
+   * Bluetooth LE (no bluetooth audio)
+* Round display, 240x240px, compatible with GC9A01
+* Two speakers
+* Two 3.5mm ports
+   * Headphone / line out and microphone / line in
+   * :ref:`Badge Link`
+      * Can be configured in each 3.5mm port (3.3v UART)
+      * MIDI compatible (31250 baud UART)
+* USB-C
+   * Two modes:
+     * USB Serial/JTAG (implemented in hardware)
+     * TinyUSB (for serial, mass storage, USB MIDI)
+   * SBU1/SBU2 (sideband use) pins have UART RX/TX for early debug
+   * Passive analog audio out
+   * Not supported: USB host
+* 40 RGB LEDs (WS2812C)
+* MicroSD card slot
+* Accelerometer? XXX
+* Battery compatible with MCH2022 badge
+

docs/conf.py

+import os
+
+# Configuration file for the Sphinx documentation builder.
+#
+# For the full list of built-in configuration values, see the documentation:
+# https://www.sphinx-doc.org/en/master/usage/configuration.html
+
+# -- Project information -----------------------------------------------------
+# https://www.sphinx-doc.org/en/master/usage/configuration.html#project-information
+
+project = 'flow3r'
+copyright = '2023'
+author = 'ccc'
+
+# -- General configuration ---------------------------------------------------
+# https://www.sphinx-doc.org/en/master/usage/configuration.html#general-configuration
+
+extensions = []
+
+templates_path = ['_templates']
+exclude_patterns = ['_build', 'Thumbs.db', '.DS_Store']
+
+
+
+# -- Options for HTML output -------------------------------------------------
+# https://www.sphinx-doc.org/en/master/usage/configuration.html#options-for-html-output
+
+html_theme = 'sphinx_rtd_theme'
+html_static_path = ['_static']

docs/index.rst

+.. flow3r documentation master file, created by
+   sphinx-quickstart on Sun Jun 11 19:43:11 2023.
+   You can adapt this file completely to your liking, but it should at least
+   contain the root `toctree` directive.
+
+Welcome to flow3r's documentation!
+==================================
+
+.. toctree::
+   :maxdepth: 1
+   :caption: The badge:
+
+   badge/hardware_specs.rst
+   badge/badge_link.rst
+
+.. toctree::
+   :maxdepth: 1
+   :caption: Python API:
+
+   python/overview.rst
+   python/audio.rst
+
+
+Indices and tables
+==================
+
+* :ref:`genindex`
+* :ref:`modindex`
+* :ref:`search`

docs/make.bat

+@ECHO OFF
+
+pushd %~dp0
+
+REM Command file for Sphinx documentation
+
+if "%SPHINXBUILD%" == "" (
+	set SPHINXBUILD=sphinx-build
+)
+set SOURCEDIR=.
+set BUILDDIR=_build
+
+%SPHINXBUILD% >NUL 2>NUL
+if errorlevel 9009 (
+	echo.
+	echo.The 'sphinx-build' command was not found. Make sure you have Sphinx
+	echo.installed, then set the SPHINXBUILD environment variable to point
+	echo.to the full path of the 'sphinx-build' executable. Alternatively you
+	echo.may add the Sphinx directory to PATH.
+	echo.
+	echo.If you don't have Sphinx installed, grab it from
+	echo.https://www.sphinx-doc.org/
+	exit /b 1
+)
+
+if "%1" == "" goto help
+
+%SPHINXBUILD% -M %1 %SOURCEDIR% %BUILDDIR% %SPHINXOPTS% %O%
+goto end
+
+:help
+%SPHINXBUILD% -M help %SOURCEDIR% %BUILDDIR% %SPHINXOPTS% %O%
+
+:end
+popd

docs/python/audio.rst

+.. py:module:: audio
+
+``audio`` module
+================
+
+(XXX when it says bool in the python api that's often an int, should change
+that)
+
+.. py:function:: headset_is_connected() -> bool
+.. c:function:: uint8_t audio_headset_is_connected()
+
+   Returns 1 if headphones with microphone were connected to the headphone
+   jack at the last call of audio_update_jacksense.
+
+.. py:function:: headphones_are_connected() -> bool
+.. c:function:: uint8_t audio_headphones_are_connected()
+
+   Returns 1 if headphones with or without microphone were connected to the
+   headphone jack at the last call of audio_update_jacksense.
+
+.. py:function:: headphones_detection_override(enable : bool)
+.. c:function:: void audio_headphones_detection_override(uint8_t enable)
+
+   If a sleeve contact mic doesn't pull the detection pin low enough the
+   codec's built in headphone detection might fail. Calling this function
+   with 'enable = 1' overrides the detection and assumes there's headphones
+   plugged in. Call with 'enable = 0' to revert to automatic detection.
+
+.. py:function:: headphones_set_volume_dB(vol_dB : float) -> float
+.. c:function:: float audio_headphones_set_volume_dB(float vol_dB);
+.. py:function:: speaker_set_volume_dB(vol_dB : float) -> float
+.. c:function:: float audio_speaker_set_volume_dB(float vol_dB);
+.. py:function:: set_volume_dB(vol_dB : float) -> float
+.. c:function:: float audio_set_volume_dB(float vol_dB);
+
+   Attempts to set target volume for the headphone output/onboard speakers
+   respectively, clamps/rounds if necessary and returns the actual volume.
+   Absolute reference arbitrary.
+   Does not unmute, use :code:`audio_{headphones_/speaker_/}set_mute` as
+   needed.
+   Enters fake mute if requested volume is below the value set by
+   :code:`audio_{headphones/speaker}_set_minimum_volume_user`.
+
+   Note: This function uses a hardware PGA for the coarse value and software
+   for the fine value. These two methods are as of yet not synced so that
+   there may be a transient volume "hiccup". "p1" badges only use software
+   volume. The unspecified variant automatically chooses the adequate channel
+   (**).
+
+
+.. py:function:: headphones_adjust_volume_dB
+.. py:function:: speaker_adjust_volume_dB
+.. py:function:: adjust_volume_dB
+
+.. py:function:: headphones_get_volume_dB
+.. py:function:: speaker_get_volume_dB
+.. py:function:: get_volume_dB
+
+.. py:function:: headphones_get_mute
+.. py:function:: speaker_get_mute
+.. py:function:: get_mute
+
+.. py:function:: headphones_set_mute
+.. py:function:: speaker_set_mute
+.. py:function:: set_mute
+
+.. py:function:: headphones_set_minimum_volume_dB
+.. py:function:: speaker_set_minimum_volume_dB
+.. py:function:: headphones_set_maximum_volume_dB
+.. py:function:: speaker_set_maximum_volume_dB
+
+.. py:function:: headphones_get_minimum_volume_dB
+.. py:function:: speaker_get_minimum_volume_dB
+.. py:function:: headphones_get_maximum_volume_dB
+.. py:function:: speaker_get_maximum_volume_dB
+
+.. py:function:: headphones_get_volume_relative
+.. py:function:: speaker_get_volume_relative
+.. py:function:: get_volume_relative

docs/python/overview.rst

+Python API
+==========