Last week I finished the first prototype of my HU3900 controller board. Thankfully no circuit mistake and It’s working as intended.

I wrote a simple program for flashing its LED in a semi-random pattern with a dimming effect controlled by the on-chip PWM generator.

Since the software’s random number generator is a pseudo-random generator, I have to find a way to get different random patterns out of different chips. To address that, I wrote a routine to fetch the IC’s 96-bits unique ID and program my random number generator based on that 96-bits ID.

The audio playback on the HU3900-LA variant is also working!