I'm futzing around with sequencing the multiplexed configuration to do something other than light the whole thing.

http://svn.red-bean.com/bbum/trunk/avr/peggybum/

That version is multiplexed only -- all signs of charlieplexing removed -- and has been refactored to have a lightAll() function that'll light all rows consecutively exactly once (and you can easily control how long each row stays lit).

BTW: if you set the delay per row to 1000U, it makes the board exceedingly uncomfortable to look it. Seizure inducing, even. Ouch.

Cool-- thanks for posting that!

>Seizure inducing
Yup. I've actually worked with the delay function the same way that you have, adding the delay time as a uint. Two fun things to play with like that: Turn the delay long enough that only one row is on at a time-- it shows you how (goddamn) bright these LEDs really are. Secondly, ramp that variable-- it's neat to see the transition between blinky/flashy and what your eye perceives as continuous.

Maybe I'll also post some of the other firmware versions that I've written....

Woot! Simple three phased animation!

I refactored the heck out of the code such that the source now provides a fairly decent example for doing multi-frame animation. Fairly decent -- there is still much room for improvement.

http://svn.red-bean.com/bbum/trunk/avr/peggybum/

When fired up, the board will:

- alternate lines for a few seconds; even / odd / even / odd, etc...

- divide the lines into quadrants vertically and alternative 1st / 3rd, 2nd / 4th for a few seconds

- display solid for as long as it does the two animations combined

When hacking on this, keep in mind that there is no true notion of a fixed fame duration. Any given frame is only as long as the durations of the lines in the frame combined.

Enjoy.

Okay, here's one of mine. The whole image fades in and out gently. Every other time, there is some noise-- a bit like retro-video scanlines-- added across the image. Download the source code here. (6 kB .ZIP file)