I ported the code to C. Now it is easier for me to work with.

This makes it easy to scale things, so now I have 10 boucing lights instead of one:

bounce3.mpg – 3MB

I’m no ASM master, so I could probably be doing it the hard way, but this code in ASM:

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I finally got the code worked out for bouncing a little ball around. Here’s a short movie:

bounce.avi – 200KB
MPG1 format – 1.1MB
I think next, I am going to rewrite all this code in C. The ASM is getting too complex for me to manage efficiently, I spend too much time tracking down ASM bugs versus actually writing code.

I hardcoded this pattern to load into SRAM on bootup:

Ok, now I’ve written the code to display patterns from RAM, but I haven’t written the code to actually update those patterns. So I’m not sure exactly where this pattern is coming from. But it’s slightly more interesting looking now:

Still the same problem with the ‘off’ leds lighting up slightly, but I think it’s not too bad for now. Next up, I think I’ll animate a simple 1-pixel ‘ball’ bouncing around or something.

March 13th:
Here it is you can see the different colors possible:

One problem, is I am using shift registers without a latch. So as the data is shifted into place, it appears on the incorrect LEDs for a very short amount of time. Which causes them to light up a short amount of time. I’m not sure there is anything I can do about this, besides shifting the data into place faster: currently my AVR is clocked at 8mhz, but it supports up to 16mhz (I just need to put in a different crystal). I think best solution is to use a latch though.