Skip to content
This repository has been archived by the owner on Jan 16, 2019. It is now read-only.

Latest commit

 

History

History
70 lines (53 loc) · 2.93 KB

README.md

File metadata and controls

70 lines (53 loc) · 2.93 KB
Raw

PyBdEcho

An audio demonstration using MicroPython, the PyBoard and its AMP Skin.

For a discussion of the application and its development refer to my EuroPython presentation in Rimini (July 2017) or PyConUK in Cardiff (October 2017).

Construction

You need good soldering skills to build the AMP skin. Once built you'll be able to access the speaker using DAC port 1 and the microphone via the ADC on X22.

Installation

The code's been tested with:

  • PyBoard v1.1
  • Audio Skin v1.0
  • MicroPython v1.9.2

Remember to always correctly eject the PyBoard from your workstation. If you do not you can corrupt files on Board.

If you need to update your PyBoard firmware first disconnect it from your workstation and, if attached, remove the audio skin. You can then Update your PyBoard firmware and then re-connect the audio skin before re-connecting the PyBoard to your workstation.

When connected the PyBoard should appear as a USB flash device (probably called PYBFLASH).

Copy main.py and PyBdEcho.py from the PyBdEcho project to the root of the device, replacing the files that are there if you need to.

Wait for the PyBoard RED LED to extinguish (it takes a few seconds) and then hit the board's RST button.

If all's gone well after rebooting the RED LED will extinguish after a few seconds and the GREEN LED should be slowly toggling (with a period of 1.5 seconds). The toggling LED indicates that the record/playback loop is on-hold, i.e. is running but not listening. The on-hold mode is great for live presentations to avoid the board triggering on your speech until you're ready.

Hitting the USR button will put the board into listen mode (indicated by a solid GREEN LED). When listening you should be able to speak (closely to the microphone) and, when you've stopped speaking (or when the recording buffer is exhausted) the device should replay what it heard.

Hitting the USR button will toggle the device between its on-hold and listening modes.

Presentation

Presentation slide (exported as a PDF document) can be found in the presentation directory.

EuroPython Issue 2

Contains the following minor corrections to the original presentation slides.

  • Typo in first bullet-point of slide 15. 4096 should be 4095
  • Correction of the block diagram in slide 23. The green LED was shown as the Playback LED when it should have been the blue LED