megamicros 3.1.4

Megamicros MEMS microphone array library for acoustic beamforming

megamicros

Megamicros library

Install

You can install Megamicros using the Phyton pip utility or from the GitHub repository.

Using pip install

First create your virtual environnement, then install:

  > virtualenv venv
  > source venv/bin/activate
  (venv) > pip install megamicros

Upgrading:

  > pip install --upgrade megamicros

Installing from the GitHub repository

Clone the Megamicros GitHub repository:

  > git clone https://github.com/bimea/megamicros.git

Create a virtual environnement in the megamicros repository and install the Python libraries needed for Megamicros to work in development mode:

  > cd megamicros
  > virtualenv venv
  > source venv/bin/activate
  > pip install -r requirements.txt
  > pip install -e ./

Issues with usb access

On windows systems

Before using the megamicros python library you must install the Zadig usb driver.

On MacOs / Linux systems

In some Linux distributions, only the root user has access to the USB port, so the following message may appear:

    ...
    aborting:  LIBUSB_ERROR_ACCESS [-3]

The USB devices are probably not accessible to users (test under root should be ok). You must then give user access to the usb port by creating a new device rules file:

    > sudo vi /etc/udev/rules.d/99-megamicros-devices.rules
    # Insert next lines which give access to the Megamicros devices (Mu32-usb2, Mu32-usb3, Mu256, Mu1024):
    SUBSYSTEM=="usb", ATTRS{idVendor}=="fe27", ATTRS{idProduct}=="ac00", MODE="0666"
    SUBSYSTEM=="usb", ATTRS{idVendor}=="fe27", ATTRS{idProduct}=="ac01", MODE="0666"
    SUBSYSTEM=="usb", ATTRS{idVendor}=="fe27", ATTRS{idProduct}=="ac03", MODE="0666"
    SUBSYSTEM=="usb", ATTRS{idVendor}=="fe27", ATTRS{idProduct}=="ac02", MODE="0666"

User should be also in the plugdev group. Check the group file:

    > vi /etc/group
    ...
    plugdev:x:46:user_account_login
    ...

If there is no entry with your user account (user_account_login above), then add your user account in the plugdev group. Unplugg and plugg your usb device. All should be fine.

!!! Note

Don't forget that if you run your Python programs on a virtual machine, usb ports should be declared as accessible on your VM.

Megamicros documentation

You can also consult the Megamicros project web page at readthedoc.bimea.io.