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Step 9Displaying images / animations on the matrix - quick hack
So it's only got 8x8 pixel and a few colors available.
First use something like Gimp to scale down you favorite image to exactly 8x8 pixels and save it as ".ppm" raw format (not ASCII). PPM is easy to read and process in a Perl script. Using ImageMagick and the command line tool "convert" won't work properly.
Upload the new arduino code, then use the Perl script to upload to the controller.
The flicker is just a mismatch of LED refresh and my camera's frame rate. After updating the code a bit, it runs quite zippy. All images are transfered live over serial as you see them.
Longer animations could be stored in an external EEPROM like it is done in various spoke-pov boards.
First use something like Gimp to scale down you favorite image to exactly 8x8 pixels and save it as ".ppm" raw format (not ASCII). PPM is easy to read and process in a Perl script. Using ImageMagick and the command line tool "convert" won't work properly.
Upload the new arduino code, then use the Perl script to upload to the controller.
The flicker is just a mismatch of LED refresh and my camera's frame rate. After updating the code a bit, it runs quite zippy. All images are transfered live over serial as you see them.
Longer animations could be stored in an external EEPROM like it is done in various spoke-pov boards.
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May 20, 2009. 12:56 PMmadworm (author)
says:
Here's another video. The data is now stored in the chip's memory, so it's a lot faster. I had to slow it down quite a bit, otherwise you'd only see a static image.
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