[MacRuby-devel] CNC Machine control using USB to IEEE 1284 Parallel port adapter

[Jordan K. Hubbard]

On Jan 17, 2012, at 7:07 PM, Scott Ribe wrote:

> On Jan 17, 2012, at 7:11 PM, Robert Rice wrote:
> 
>> Prolific provides documentation for the simple report protocol for the device. I suspect that an appropriate driver already exists for this device but how would I find it?

I actually rather doubt that a driver for this device already exists, unless you happen to google around for "Prolific USB 1284" and get a hit for a Mac OS X driver somewhere.  The vendor's own web site suggests a rather strong Windows-bias, however, and I would have to guess that writing a KExt is in your future.   Once you've done that, whatever protocol you talk to the /dev node is more or less up to you, and should be notionally as easy as opening the device for R/W from your MacRuby program and doing the appropriate data exchange with it.

I would recommend starting here:  http://developer.apple.com/library/mac/#referencelibrary/GettingStarted/GS_HardwareDrivers/_index.html

:-)

- Jordan

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