- October 3rd, 2010
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In my last post I mentioned working on getting composite video out of my Launchpad (MSP430G2231). My problem was a low horizontal resolution due to a CPU speed limitation. Since then, I’ve been able to get the MSP430′s Universal Serial Interface (USI) to spit out the video data. I’ve got the USI acting like a shift register, so the CPU only needs to load it with the video data periodically. I got the idea from batsocks.co.uk.
Right now, the program seems to have vertical sync and horizontal sync timings correct. These are handled in software and by Timer A respectively. The pixels are stored in an array and copied to the USI. I would say the most tedious stuff is out of the way.
I was hoping to make something like the Batsocks TellyMate Shield.
I’m in my second semester of college for my CE bachelors and I work part time, so right now I’m just too busy to give this project the attention it needs. I figure I might as well let the source out in case someone could use it, as I probably won’t be working on it for awhile. This requires the modified setDCO library.
Schematic and test pattern (0×88).