A Ruby extension for the ftd2xx usb driver (see ftdichip.com)
Intel Mac OSX (tested on Snow Leopard) FTDI D2XX device drivers, can be downloaded here: www.ftdichip.com/Drivers/D2XX/MacOSX/UniBin/D2XX0.1.7.dmg
note: The d2xx driver can not coexist with the VCP driver, if you have both
remove the VCP driver (see http://ftdichip.com for instuctions). Remember to do kextunload if you don't restart your system.
Initialize: If you have device that has been configured by a specific vendor, start by setting the VIDPID
Ftd2xx.ft_set_vidpid(0x1781,0x0c30)
verify that your device is connected and present (returns the number of ftdi enabled devices)
device_index = Ftd2xx.create_device_info_list - 1 open the device if not allready open
handle = Ftd2xx.open(device_index) optional if your vendor requires it, set baudrate etc.
Ftd2xx.ft_set_baud_rate(handle,4800) Ftd2xx.ft_set_timeouts(handle,5000,0)
Once you have initialized your device and have a handle you can start, reading and wirting to the device
The general reading loop looks like this:
bytes_read = 1 c = " " while (bytes_read != 0) and (c != "\n") c = " " bytes_read = Ftd2xx.read(@handle,c) end
The general writing loop looks like this:
"Hello World!".scan(/.{1,8}/).each do |str| Ftd2xx.write(handle,str) end
When your done, remember to close:
Ftd2xx.close
sudo gem install ruby-ftd2xx-0.0.1-universal-darwin-10 –no-ri –no-rdoc
If you feel like using this on another platform, the extension was generated by using swig (see swig.org).
cd to where you have ruby-ftd2xx installed and type
rake that will build a new gem for your platform.
The MIT License
© Copyright 2010 Pontus Strömdahl.
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
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