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June 29, 2012 AT 2:00 am

Tricking a BeagleBone to Output Video

Florian shows us how to trick the BeagleBone to output video.   By making the BeagleBone think it has the DVI Cape plugged in, it would output video.

I decided to attempt to connect the PSP Screen I fumbled together earlier to the Beagle board since all the necessary signals are readily available and a display driver is included in the Ångström distro.  How hard could it be ? Right ..?
Beaglebone Capes are recognized by the kernel via their eeprom. This memory holds identification and configuration data for each Cape. In order to impersonate the DVI Cape I used an ATmega32 to talk to Beagle’s I2C bus and mimicking that very specific eeprom. The actual memory contents for the DVI Cape eeprom can be downloaded from the website.
via HaD

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