196 lines
6.4 KiB
ReStructuredText
196 lines
6.4 KiB
ReStructuredText
.. _install:
|
||
|
||
============
|
||
Installation
|
||
============
|
||
|
||
.. currentmodule:: picamera
|
||
|
||
|
||
.. _raspbian_install:
|
||
|
||
Raspbian installation
|
||
=====================
|
||
|
||
If you are using the `Raspbian`_ distro, it is best to install picamera using
|
||
the system's package manager: apt. This will ensure that picamera is easy to
|
||
keep up to date, and easy to remove should you wish to do so. It will also make
|
||
picamera available for all users on the system. To install picamera using apt
|
||
simply::
|
||
|
||
$ sudo apt-get update
|
||
$ sudo apt-get install python-picamera python3-picamera
|
||
|
||
To upgrade your installation when new releases are made you can simply use
|
||
apt's normal upgrade procedure::
|
||
|
||
$ sudo apt-get update
|
||
$ sudo apt-get upgrade
|
||
|
||
If you ever need to remove your installation::
|
||
|
||
$ sudo apt-get remove python-picamera python3-picamera
|
||
|
||
.. note::
|
||
|
||
If you are using a recent installation of Raspbian, you may find that the
|
||
python-picamera package is already installed (it is included by default
|
||
in recent versions).
|
||
|
||
.. _Raspbian: http://www.raspbian.org/
|
||
|
||
|
||
.. _non_raspbian_install:
|
||
|
||
Alternate distro installation
|
||
=============================
|
||
|
||
On distributions other than Raspbian, it is probably simplest to install system
|
||
wide using Python's ``pip`` tool::
|
||
|
||
$ sudo pip install picamera
|
||
|
||
If you wish to use the classes in the :mod:`picamera.array` module then specify
|
||
the "array" option which will pull in numpy as a dependency (be warned that
|
||
building numpy takes a *long* time on a Pi)::
|
||
|
||
$ sudo pip install "picamera[array]"
|
||
|
||
To upgrade your installation when new releases are made::
|
||
|
||
$ sudo pip install -U picamera
|
||
|
||
If you ever need to remove your installation::
|
||
|
||
$ sudo pip uninstall picamera
|
||
|
||
|
||
.. _firmware:
|
||
|
||
Firmware upgrades
|
||
=================
|
||
|
||
The behaviour of the Pi's camera module is dictated by the Pi's firmware. Over
|
||
time, considerable work has gone into fixing bugs and extending the
|
||
functionality of the Pi's camera module through new firmware releases. Whilst
|
||
the picamera library attempts to maintain backward compatibility with older Pi
|
||
firmwares, it is only tested against the latest firmware at the time of
|
||
release, and not all functionality may be available if you are running an older
|
||
firmware. As an example, the :attr:`~PiCamera.annotate_text` attribute relies
|
||
on a recent firmware; older firmwares lacked the functionality.
|
||
|
||
You can determine the revision of your current firmware with the following
|
||
command::
|
||
|
||
$ uname -a
|
||
|
||
The firmware revision is the number after the ``#``::
|
||
|
||
Linux kermit 3.12.26+ #707 PREEMPT Sat Aug 30 17:39:19 BST 2014 armv6l GNU/Linux
|
||
/
|
||
/
|
||
firmware revision --+
|
||
|
||
On Raspbian, the standard upgrade procedure should keep your firmware
|
||
up to date::
|
||
|
||
$ sudo apt-get update
|
||
$ sudo apt-get upgrade
|
||
|
||
.. warning::
|
||
|
||
Previously, these documents have suggested using the ``rpi-update`` utility
|
||
to update the Pi's firmware; this is now discouraged. If you have
|
||
previously used the ``rpi-update`` utility to update your firmware, you can
|
||
switch back to using ``apt`` to manage it with the following commands::
|
||
|
||
$ sudo apt-get update
|
||
$ sudo apt-get install --reinstall libraspberrypi0 libraspberrypi-{bin,dev,doc} raspberrypi-bootloader
|
||
$ sudo rm /boot/.firmware_revision
|
||
|
||
You will need to reboot after doing so.
|
||
|
||
.. note::
|
||
|
||
Please note that the `PiTFT`_ screen (and similar GPIO-driven screens)
|
||
requires a custom firmware for operation. This firmware lags behind the
|
||
official firmware and at the time of writing lacks several features
|
||
including long exposures and text overlays.
|
||
|
||
.. _PiTFT: http://www.adafruit.com/product/1601
|
||
|
||
|
||
.. _dev_install:
|
||
|
||
Development installation
|
||
========================
|
||
|
||
If you wish to develop picamera itself, it is easiest to obtain the source by
|
||
cloning the GitHub repository and then use the “develop” target of the Makefile
|
||
which will install the package as a link to the cloned repository allowing
|
||
in-place development (it also builds a tags file for use with vim/emacs with
|
||
Exuberant’s ctags utility). The following example demonstrates this method
|
||
within a virtual Python environment::
|
||
|
||
$ sudo apt-get install lsb-release build-essential git git-core \
|
||
exuberant-ctags python-virtualenv python3-virtualenv python-dev \
|
||
python3-dev libjpeg8-dev zlib1g-dev libav-tools \
|
||
texlive-latex-recommended texlive-latex-extra texlive-fonts-recommended
|
||
$ virtualenv -p /usr/bin/python3 sandbox
|
||
$ source sandbox/bin/activate
|
||
(sandbox) $ git clone https://github.com/waveform80/picamera.git
|
||
(sandbox) $ cd picamera
|
||
(sandbox) $ make develop
|
||
|
||
To pull the latest changes from git into your clone and update your
|
||
installation::
|
||
|
||
$ source sandbox/bin/activate
|
||
(sandbox) $ cd picamera
|
||
(sandbox) $ git pull
|
||
(sandbox) $ make develop
|
||
|
||
To remove your installation blow away the sandbox and the clone::
|
||
|
||
$ rm -fr ~/sandbox/ ~/picamera/
|
||
|
||
For anybody wishing to hack on the project, I would strongly recommend reading
|
||
through the :class:`PiCamera` class' source, to get a handle on using the
|
||
``mmalobj`` layer. This is a layer introduced in picamera 1.11 to ease the
|
||
usage of ``libmmal`` (the underlying library that picamera, ``raspistill``,
|
||
and ``raspivid`` all rely upon).
|
||
|
||
Beneath ``mmalobj`` is a :mod:`ctypes` translation of the ``libmmal`` headers
|
||
but my hope is that most developers will never need to deal with this
|
||
directly (thus, a working knowledge of C is hopefully no longer necessary to
|
||
hack on picamera).
|
||
|
||
Various classes for specialized applications also exist
|
||
(:class:`PiCameraCircularIO`, :class:`~array.PiBayerArray`, etc.)
|
||
|
||
Even if you don’t feel up to hacking on the code, I’d love to hear suggestions
|
||
from people of what you’d like the API to look like (even if the code itself
|
||
isn’t particularly pythonic, the interface should be)!
|
||
|
||
|
||
.. _test_suite:
|
||
|
||
Test suite
|
||
==========
|
||
|
||
If you wish to run the picamera test suite, follow the instructions in
|
||
:ref:`dev_install` above and then make the "test" target within the sandbox::
|
||
|
||
$ source sandbox/bin/activate
|
||
(sandbox) $ cd picamera
|
||
(sandbox) $ make test
|
||
|
||
.. warning::
|
||
|
||
The test suite takes a *very* long time to execute (at least 1 hour on an
|
||
overclocked Pi 3). Depending on configuration, it can also lockup the
|
||
camera requiring a reboot to reset, so ensure you are familiar with SSH or
|
||
using alternate TTYs to access a command line in the event you need to
|
||
reboot.
|
||
|