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pifacecommon

Common functions for interacting with PiFace products.

Auto Installation

Installing the software

$ sudo ./install.sh

Manual Installation

1. Enable the SPI module

The PiFace tools communicate with the Raspberry Pi using the SPI interface. The SPI interface driver is included in the latest Raspbian distributions but is not enabled by default.

To load the SPI driver manually, type:

$ sudo modprobe spi-bcm2708

This will not persist after a reboot. To permanently enable the SPI module comment out the spi module blacklist line in /etc/modprobe.d/raspi-blacklist.conf. You can do this automatically by running the `unblacklist-spi-bcm2708.sh' script.

After a reboot the /dev/spidev* devices should appear but they require special privileges to access them. You'll need to add a udev rule (udev monitors and configures devices) and set up groups by running `spidev-setup.sh'.

2. Building and installing

Python automatically builds the source, generates the egg file and installs.

$ sudo python3 setup.py install

Examples

$ python3
>>> import pifacecommon
>>> pifacecommon.init()
>>> pifacecommon.write(0xAA, pifacecommon.GPIOA)
>>> pifacecommon.read(pifacecommon.GPIOA)
0xAA