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This is a project to provide automated control over a relay that switches
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Scematics for the audio switching unit can be found in the project directory.
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In summary, a relay is controlled to switch stereo input audio between two
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outputs. Also, one of the outputs can be overridden by plugging in some
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The software below is for a MinimusUSB and will turn it in to a USB serisl
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device with a unique vendor and product id. It is based on LUFA.
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Download the LUFA project and unpack it in to the root directory of this
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project. Then, either rename the LUFA directory to "LUFA", or just symlink to
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it (which will allow you to have several versions of the library, should you
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$ wget http://lufa-lib.googlecode.com/files/LUFA-120730.zip
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$ unzip LUFA-120730.zip
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$ ln -s LUFA-120730 LUFA
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Having unpacked LUFA, build the audio-switcher software.
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Then, plug in your MinimusUSB, put it in to DFU upload mode (whilst holding
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down button B, press reset). You can confirm it is ready with `lsusb`, which
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should list the following device present:
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Now upload the audio switcher software.
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Finally, reset the MinimusUSB. You can confirm that the software is working
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with `lsusb`, which should show the following device present:
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You can find out more about the excellent LUFA project here:
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http://www.fourwalledcubicle.com/LUFA.php
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