UDF is almost done, it need to refine details, for now I tested simple UDF that only change the value of LATB register from 0xAA to 0xBB and viceversa with success, I need to test low priority interrupts with UDF and send/receive data over USB inside the UDF, may be a couple of days more and the software/firmware part of this project will be completed!!..

The next step will be redesign the board and include logic level shifting to SPI/I2C/USART pins, to interface 5V to 3.3/1.8/1.2 volts.

When all the UDF part be finished I will upload the source files to GitHub.