I wanted to share some signaling software I wrote for the Propeller 2 - and have been using for some time.
I call it PWM-54. The software generates square wave signals - and uses 9 sets of 6 synchronous channels. This can easily be changed to ALL 54 channels being synchronous.
If you own a Propeller 2 board - this software code is available below for testing. I wrote it in SPIN2 - and compiled it with Propeller Tool.
It might be useful to your projects - especially if they involve multiple 1/4-wave divisions.
The menu setup & README file are organized around my own Testbed experiments - but it still works pretty good.
The software also includes a 5 layer wave-division multiplexer, and a sine-wave generator.