v4.2.0

• Added daemon flag for PortEventListener.

Change Log

v4.1.2

• Fixed bug with new Device Tree (Pi2) by changing GPIO_INTERRUPT_DEVICE
  from /sys/devices/virtual/gpio/ to /sys/class/gpio/ and changing udev
  rule.

v4.0.0

• Ignored "Interrupted system call" error in watch_port_events.
• Rewrite main functions into chip specific (MCP23S17) class.
• GPIOInterruptDevice class replacing core GPIO enable/disable functions.
• SPIDevice class replacing spisend function. Can now add in spi_callback
  function which is called before each SPI write.
• Updated installation instructions.

• Fixes the installation bug (accidentally removed the house keeping script in the Debian package).
• Adds physical level interrupt directions (IODIR_FALLING_EDGE, IODIR_RISING_EDGE).

Version 3.1 adds an adjustable settle time for interrupts which allows for the debouncing of noisy inputs. You can change this when you register a pin number on the PortEventListener like so:

listener = PortEventListener(port)
listener.register(pin_num, direction, callback, settle_time)

settle_time is optional and defaults to 0.020 seconds.

The packages for this release have been temporarily removed because they do not install correctly. A new release will be released very soon (sometime today 17/09/2013).

New in version 3.0.0:

• Added timeout class (fixing Issue #2) in interrupts.
• Added support for interrupts on multiple boards.
• Interrupts must be enabled/disabled manually. Automatic handling of this
  broke interrupts from multiple boards.

The PiFace Common module provides common functions and classes for interacting with PiFace products.