Integrate the ADF components as parts of MicroPython

Prepare

To use this integration, please read the documents of MicroPython and the README of MicroPython port for ESP32 first.

Build and flash

To build the project, please follow the steps below:

• Clone ESP-ADF, ESP-IDF, into your workspace and update all the submodules.
• ESP-IDF support HASH '6ccb4cf5b7d1fdddb8c2492f9cbc926abaf230df'.
• export ADF_PATH={ your ESP-ADF's path }
• export IDF_PATH={ your ESP-IDF's path }
• Clone MicroPython into ${ADF_PATH}/micropyton_adf.
• MicroPython support HASH '1f371947309c5ea6023b6d9065415697cbc75578'.
• cd ${IDF_PATH}, and apply the patch of ${ADF_PATH}/idf_patches/idf_v3.3_freertos.patch
• cd ${ADF_PATH}/micropyton_adf/micropython, and apply the patch of ${ADF_PATH}/micropyton_adf/mpmake.patch.
• select your audio board in ${ADF_PATH}/micropyton_adf/sdkconfig.adf.
• cd ${ADF_PATH}/micropyton_adf/micropython/mpy-cross, run make -j8.
• cd ${ADF_PATH}/micropyton_adf/micropython/ports/esp32, run make deploy -j8 BOARD=GENERIC_SPIRAM BAUD=921600 PORT={ your uart port }.

Libraries

audio - player and recorder

This module implements player and recorder

• player: encapsulates the ADF esp_audio, support local and online resources.
• recorder: record and encoding the voice into file.

NOTICE:

This a beta release as version '0.5-beta1', Classes and methods may be changed by further release.

Constructors

• class audio.player([state_callback])

  Create a player, state_callback is a monitor of player state, when state changed, this callback will be invoked.

  def cb(state):
      print(state) #'{{'media_src': 0, 'err_msg': 0, 'status': 1}}', media_src is reserved.
  
  p = audio.player(cb)
  # play music

• class audio.recorder()

  Create recorder.

  r = audio.recorder()

Functions

• audio.verno()

  version of audio module

  >>> audio.verno()
  '0.5-beta1'

• audio.mem_info()

  Show memory usage.

  >>> audio.mem_info()
  {'dram': 176596, 'inter': 212472, 'mem_total': 1197704}

Constants

Audio error type:

• audio.AUDIO_OK: ESP_ERR_AUDIO_NO_ERROR
• audio.AUDIO_FAIL : ESP_ERR_AUDIO_FAIL
• audio.AUDIO_NO_INPUT_STREAM : ESP_ERR_AUDIO_NO_INPUT_STREAM
• audio.AUDIO_NO_OUTPUT_STREAM : ESP_ERR_AUDIO_NO_OUTPUT_STREAM
• audio.AUDIO_NO_CODEC : ESP_ERR_AUDIO_NO_CODEC
• audio.AUDIO_HAL_FAIL : ESP_ERR_AUDIO_HAL_FAIL
• audio.AUDIO_MEMORY_LACK : ESP_ERR_AUDIO_MEMORY_LACK
• audio.AUDIO_INVALID_URI : ESP_ERR_AUDIO_INVALID_URI
• audio.AUDIO_INVALID_PARAMETER : ESP_ERR_AUDIO_INVALID_PARAMETER
• audio.AUDIO_NOT_READY : ESP_ERR_AUDIO_NOT_READY
• audio.AUDIO_TIMEOUT : ESP_ERR_AUDIO_TIMEOUT
• audio.AUDIO_ALREADY_EXISTS : ESP_ERR_AUDIO_ALREADY_EXISTS
• audio.AUDIO_LINK_FAIL : ESP_ERR_AUDIO_LINK_FAIL
• audio.AUDIO_OPEN : ESP_ERR_AUDIO_OPEN
• audio.AUDIO_INPUT : ESP_ERR_AUDIO_INPUT
• audio.AUDIO_PROCESS : ESP_ERR_AUDIO_PROCESS
• audio.AUDIO_OUTPUT : ESP_ERR_AUDIO_OUTPUT
• audio.AUDIO_CLOSE : ESP_ERR_AUDIO_CLOSE

class audio.player

Audio player now can support mp3,amr and wav, if more types are needed, please add the decoder in function audio_player_create.

Methods

• player.play(uri, pos=0, sync=False) Play the uri from specified position. if sync = True, the thread will be suspended until the music finished. uri formated as "file://sdcard/test.wav" or "https://dl.espressif.com/dl/audio/ff-16b-2c-44100hz.mp3".

• player.stop(termination=player.TERMINATION_NOW) Stop the player

• player.pause() Pause the player

• player.resume() Resume the player

• player.set_vol(vol) Set the volume of the audio board.

• player.get_vol() Get the volume of the audio board.

• player.get_state() Get the state of the player.

  >>> p = audio.player(None)
  >>> p.get_state()
  {'media_src': 0, 'err_msg': 0, 'status': 0}

• player.pos() Get the position in bytes of currently played music.

• player.time() Get the position in microseconds of currently played music.

Constants

Player termination type:

• TERMINATION_NOW: TERMINATION_TYPE_NOW
• TERMINATION_DONE: TERMINATION_TYPE_DONE

Player status type:

• STATUS_UNKNOWN: AUDIO_STATUS_UNKNOWN
• STATUS_RUNNING: AUDIO_STATUS_RUNNING
• STATUS_PAUSED: AUDIO_STATUS_PAUSED
• STATUS_STOPPED: AUDIO_STATUS_STOPPED
• STATUS_FINISHED: AUDIO_STATUS_FINISHED
• STATUS_ERROR: AUDIO_STATUS_ERROR

class audio.recorder

Methods

• recorder.start(path, format=PCM, maxtime=0, endcb=None) Start the recorder and save the voice into path with encoding the date as format. If maxtime > 0, recorder will stop automatic when the duration passed, endcb will be invoked if not None. If maxtime == 0, recorder will work until recorder.stop() is called.

• recorder.stop() Stop recording.

• recorder.is_running() Get the state of recorder, Bool.

Constants

format of final data:

• recorder.PCM
• recorder.AMR
• recorder.MP3
• recorder.WAV