node-SPI

This is a library made as a wrapper around ioctl to controll SPI ports in embedded linux. It has been tested with the raspberry Pi and an mcp3008 chip only, though I expect it to work elsewhere with other ICs as well.

If you find any bugs or have any patches please let me know!

Usage

rom nodejs script include with var spi = require('./path/to/module/rSPI') or place module in an appropriate node_modules directory.

Functions:

spi.configSPI(mode,max_clock,device)
    takes SPI mode, clock rate, and device path (eg /dev/spidev0.1 )
    If system defaults are okay then no need to call configSPI
spi.readwriteSPI(tx_data,device)
    takes a device path, and an array of numbers interpreted as bytes
    writes bytes and returs the same number of read bytes from spidev

See code comments for more details.

Build Instructions

Dependencies

• npm -- This comes with newer versions of node

• node-gyp -- this tool automates building node modules (requires a system compiler)

  npm install -g node-gyp

to build you must first configure

node-gyp configure

and finally build

node-gyp build

the addon is now in /build/Release/*.node to use the addon move rSPI.node to either the global node_modules directory or place it in a your a folder called node_modules with in your project directory