[beagleboard] i2c-bus - A new Node.js I2C module

[Brian Cooke]

I've written a new Node.js module called i2c-bus for accessing I2C devices
on Linux boards like the BeagleBone Black.

It can be found here on github: https://github.com/fivdi/i2c-bus

[Brian Cooke]

Sure, here are a number of things that come to mind:

- All methods have asynchronous and synchronous forms (i2c has the
synchronous form although it looks like it has the asynchronous form)
- It offers more complete support for the SMBus protocols (quick
command, send byte, receive byte, write byte/word, read byte/word, I2C
block transaction (I2C block transaction are not part of the SMBus
specification))
- It supports plain I2C (see methods i2cRead, i2cReadSync, i2cWrite,
i2cWriteSync)
- It offers runtime information about the functionality supported by the
bus/adapter (like 'i2cdetect -F 1', see methods i2cFuncs and i2cFuncsSync,
see example
https://github.com/fivdi/i2c-bus/blob/master/example/i2cdetect.js)
- One i2c-bus object can handle multiple devices
- Because it supports the SMBus receive byte protocol (see methods
receiveByte and receiveByteSync) it's possible to scan for devices (like
'i2cdetect -y -r 1', see example
https://github.com/fivdi/i2c-bus/blob/master/example/i2cscan.js). This
resolves https://github.com/kelly/node-i2c/issues/27
- ...

Can you describe any advantages it has over node-i2c?

Post by Brian Cooke
I've written a new Node.js module called i2c-bus for accessing I2C

devices

Post by Brian Cooke
on Linux boards like the BeagleBone Black.
It can be found here on github: https://github.com/fivdi/i2c-bus
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[Brian Cooke]

There is one more thing:


- i2c-bus is io.js and Node.js compatible - tested with io.js 1.0.2 on a
BeagleBone Black running Ubuntu 14.04.1 LTS (GNU/Linux 3.14.26-ti-r43
armv7l)

[Andrew Snider]

Thanks for this, I was looking at node-i2c & how to implement scan & went
all cross eyed.

Post by Brian Cooke
- i2c-bus is io.js and Node.js compatible - tested with io.js 1.0.2 on
a BeagleBone Black running Ubuntu 14.04.1 LTS (GNU/Linux 3.14.26-ti-r43
armv7l)