A module to control Raspberry Pi GPIO channels
Project description
This package provides a Python module to control the GPIO on a Raspberry Pi.
Note that this module is unsuitable for real-time or timing critical applications. This is because you can not predict when Python will be busy garbage collecting. It also runs under the Linux kernel which is not suitable for real time applications - it is multitasking O/S and another process may be given priority over the CPU, causing jitter in your program. If you are after true real-time performance and predictability, buy yourself an Arduino http://www.arduino.cc !
Note that the current release does not support SPI, I2C, hardware PWM or serial functionality on the RPi yet. This is planned for the near future - watch this space! One-wire functionality is also planned.
Although hardware PWM is not available yet, software PWM is available to use on all channels.
For examples and documentation, visit http://sourceforge.net/p/raspberry-gpio-python/wiki/Home/
Change Log
0.7.1
Better RPi board + peri_addr detection (issue 190 / 191)
Fix PyEval_InitThreads deprecation warning for Python 3.9 (issue 188)
Fix build using GCC 10 (issue 187)
Fix docstrings to not include licence
Remove Debian/Raspbian stretch packaging support
Use setuptools instead of distutils
Added detection of Zero 2 W
Tested and working with Python 2.7, 3.7, 3.8, 3.9, 3.10
0.7.0
Updated RPI_INFO to include RPi 4B
Fixed pull up/down for Pi4 (issue 168)
Fix spelling mistake in docstrings
Tested and working on Raspbian Buster + Python 3.8.0b2
Fix board detection for aarch64 (Issues 161 / 165)
Fix checking mmap return value in c_gpio.c (issue 166)
0.6.5
Fix exception on re-export of /sys/class/gpio/gpioNN
0.6.4
Event cleanup bug (issue 145)
Raise exception for duplicate PWM objects (issue 54 - Thijs Schreijer <thijs@thijsschreijer.nl>)
Fix build warnings (Issue 146 - Dominik George)
test.py runs unchanged for both python 2+3
Soft PWM stops running fix (Issues 94, 111, 154)
Soft PWM segfault fix (Luke Allen pull request)
0.6.3
Fix code so it builds under PyPy (Gasper Zejn)
os.system breaks event detection - Matt Kimball (issue 127)
0.6.2
Rewrote Debian packaging mechanism
RPI_INFO reports Pi 3
Changed module layout - moved C components to RPi._GPIO
0.6.1
Update RPI_INFO to detect more board types
Issue 118 - add_event_detect sometimes gives runtime error with unpriv user
Issue 120 - setmode() remembers invalid mode
0.6.0a3
Now uses /dev/gpiomem if available to avoid being run as root
Fix warnings with pull up/down on pins 3/5
Correct base address on Pi 2 when devicetree is disabled
caddr_t error on compile (Issue 109)
Error on invalid parameters to setup() (issue 93)
Add timeout parameter to wait_for_edge() (issue 91)
0.5.11
Fix - pins > 26 missing when using BOARD mode
Add getmode()
Raise exception when a mix of modes is used
GPIO.cleanaup() unsets the current pin mode
0.5.10
Issue 95 - support RPi 2 boards
Introduce RPI_INFO
Deprecate RPI_REVISION
Issue 97 - fixed docstring for setup()
0.5.9
Issue 87 - warn about pull up/down on i2c pins
Issue 86/75 - wait_for_edge() bugfix
Issue 84 - recognise RPi properly when using a custom kernel
Issue 90 - cleanup() on a list/tuple of channels
0.5.8
Allow lists/tuples of channels in GPIO.setup()
GPIO.output() now allows lists/tuples of values
GPIO.wait_for_edge() bug fixes (issue 78)
0.5.7
Issue 67 - speed up repeated calls to GPIO.wait_for_event()
Added bouncetime keyword to GPIO.wait_for_event()
Added extra edge/interrupt unit tests
GPIO.wait_for_event() can now be mixed with GPIO.add_event_detect()
Improved cleanups of events
Issue 69 resolved
0.5.6
Issue 68 - support for RPi Model B+
Fix gpio_function()
0.5.5
Issue 52 - ‘unallocate’ a channel
Issue 35 - use switchbounce with GPIO.event_detected()
Refactored events code
Rewrote tests to use unittest mechanism and new test board with loopbacks
Fixed adding events after a GPIO.cleanup()
Issue 64 - misleading /dev/mem permissions error
Issue 59 - name collision with PWM constant and class
0.5.4
Changed release status (from alpha to full release)
Warn when GPIO.cleanup() used with nothing to clean up (issue 44)
Avoid collisions in constants (e.g. HIGH / RISING / PUD_DOWN)
Accept BOARD numbers in gpio_function (issue 34)
More return values for gpio_function (INPUT, OUTPUT, SPI, I2C, PWM, SERIAL, UNKNOWN)
Tidy up docstrings
Fix /dev/mem access error with gpio_function
0.5.3a
Allow pydoc for non-root users (issue 27)
Fix add_event_detect error when run as daemon (issue 32)
Simplified exception types
Changed from distribute to pip
0.5.2a
Added software PWM (experimental)
Added switch bounce handling to event callbacks
Added channel number parameter to event callbacks (issue 31)
Internal refactoring and code tidy up
0.5.1a
Fixed callbacks for multiple GPIOs (issue 28)
0.5.0a
Added new edge detection events (interrupt handling) - Added add_event_detect() - Added remove_event_detect() - Added add_event_callback() - Added wait_for_edge()
Removed old experimental event functions - Removed set_rising_event() - Removed set_falling_event() - Removed set_high_event() - Removed set_low_event()
Changed event_detected() for new edge detection functionality
input() now returns 0/LOW == False or 1/HIGH == True (integers) instead of False or True (booleans).
Fix error on repeated import (issue 3)
Change SetupException to a RuntimeError so it can be caught on import (issue 25, Chris Hager <chris@linuxuser.at>)
Improved docstrings of functions
0.4.2a
Fix for installing on Arch Linux (Python 3.3) (issue 20)
Initial value when setting a channel as an output (issue 19)
0.4.1a
Added VERSION
Permit input() of channels set as outputs (Eric Ptak <trouch@trouch.com>)
0.4.0a
Added support for Revision 2 boards
Added RPI_REVISION
Added cleanup() function and removed automatic reset functionality on program exit
Added get_function() to read existing GPIO channel functionality (suggestion from Eric Ptak <trouch@trouch.com>)
Added set_rising_event()
Added set_falling_event()
Added set_high_event()
Added set_low_event()
Added event_detected()
Added test/test.py
Converted debian to armhf
Fixed C function short_wait() (thanks to Thibault Porteboeuf <thibaultporteboeuf@gmail.com>)
0.3.1a
Fixed critical bug with swapped high/low state on outputs
Added pull-up / pull-down setup functionality for inputs
0.3.0a
Rewritten as a C extension
Now uses /dev/mem and SoC registers instead of /sys/class/gpio
Faster!
Make call to GPIO.setmode() mandatory
Added GPIO.HIGH and GPIO.LOW constants
0.2.0
Changed status from alpha to beta
Added setmode() to be able to use BCM GPIO 00.nn channel numbers
Renamed InvalidPinException to InvalidChannelException
0.1.0
Fixed direction bug
Added MANIFEST.in (to include missing file)
Changed GPIO channel number to pin number
Tested and working!
0.0.3a
Added GPIO table
Refactored
Fixed a few critical bugs
Still completely untested!
0.0.2a
Internal refactoring. Still completely untested!
0.0.1a
First version. Completely untested until I can get hold of a Raspberry Pi!
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