I've finally got iCEcube2 working (MultiArch gave me some problem with X11 resolution been reset to 800x600, but I fixed that).
I've done some pratice to revamp my Verilog knowledge, not done any since a year, I modified the RGB_LED_BLINK sample code, just as PoC, to get more Colors ...
Now it is alternate with also magenta/cyan/yellow/while ...
If someone wish to test it, here in attachment ...
Next step, find duty to this small board : maybe I2C slave peripheral !
I didn't check yet if UPDuino_IOX_20170908.tar is doing so ...
Maybe DMX output thru I2C ?
I think I must dream more about it ...