Karnaugh Interactive Extendable ASIC Simulation Board AKA Karnix ASB-254.

Features:

• RPi3 form factor board with 40pin head connector
• Lattice ECP5 25K FPGA, RISC-V ready
• SRAM 16x256 KBits (512 KB)
• NOR flash 128 MBits for FPGA configs
• EEPROM 1Kbits (128 bytes) for user settings
• Ethernet 10/100Base-TX
• RS-485 transceiver
• HDMI connector directly connected to FPGA
• SPI DAC 4 channels (2 for audio)
• SPI ADC 4 channels + 1 mic in
• 4 keys and 4 LEDs
• 4 pin audio jack connected to DAC/ADC
• Built-in FT2232D based programmer

Board images

Karnix v1.0 bugs

Version 1.0 appeared to be buggy:

• Ethernet does not work because of wrong power wiring.
• FT2232D IOVCC was wrongly wired to +5V instead of +3V3.
• Some issues with footprints.

Examples

• Directory Examples/VexRiscvWithHUB12ForKarnix contains complete implementation of HUB-12/HUB-75 adapter for LED matrixes written in C running on VexRiscv soft-core. It provides Modbus/UDP interface to corresponding LED matrix.

Video

https://www.youtube.com/watch?v=xr0pdGuJbXQ