A simple library for accessing the MCP23S17 port expander through SPI. See
example.c for ideas on how to use.
http://piface.github.io/libmcp23s17
Build the docs with:
$ git clone https://github.com/piface/libmcp23s17.git
$ cd libmcp23s17/docs/
$ doxygen mcp23s17-doc.conf
To view as HTML, point your browser to libmcp23s17/docs/html/index.html.
To view as PDF:
$ cd latex/
$ make
The pdf is called refman.pdf.