Nuclei FPGA Evaluation Kit

Overview

Nuclei have customized different FPGA evaluation boards (called Nuclei FPGA Evaluation Kit), which can be programmed with Nuclei Demo/Eval SoC FPGA bitstream.

• Nuclei FPGA Evaluation Kit, 100T version

  This 100T version is a very early version which widely used since 2019, it has a Xilinx XC7A100T FPGA chip on the board.

Nuclei FPGA Evaluation Kit, 100T Version

• Nuclei FPGA Evaluation Kit, DDR 200T version

  This DDR 200T version is a latest version which provided since 2020.09, it has a Xilinx XC7A200T FPGA chip on the board, and the onboard DDR could be connected to Nuclei RISC-V Core.

  This board is a choice to replace the 100T version, and it could be use to evaluate any Nuclei RISC-V core.

  We also use this version of board to evaluate Nuclei UX class core which can run Linux on it, it you want to run Linux on this board, please refer to Nuclei Linux SDK.

Nuclei FPGA Evaluation Kit, DDR 200T Version

• Nuclei FPGA Evaluation Kit, MCU 200T version

  This MCU 200T version is a latest version which provided since 2020.09, it has a Xilinx XC7A200T FPGA chip on the board, but there is no DDR chip on the board.

  This board is a choice to replace the 100T version, and it could be use to evaluate any Nuclei RISC-V core with don’t use DDR.

Nuclei FPGA Evaluation Kit, MCU 200T Version

There are also other fpga board we supported, such as KU060 and VCU118 board, please contact with our sales for details.

Click Nuclei FPGA Evaluation Kit Board Documents to access the documents of these boards.

Setup

Follow the guide in Nuclei FPGA Evaluation Kit Board Documents to setup the board, make sure the following items are set correctly:

• Use Nuclei FPGA debugger to connect the MCU-JTAG on board to your PC in order to download and debug programs and monitor the UART message.

• Power on the board using USB doggle(for 100T) or DC 12V Power(for MCU 200T or DDR 200T).

• The Nuclei FPGA SoC FPGA bitstream with Nuclei RISC-V evaluation core inside is programmed to FPGA on this board.

• Following steps in debugger kit manual to setup JTAG drivers for your development environment

How to use

For Nuclei FPGA Evaluation board:

• evalsoc can run on this fpga board, please choose the correct SoC.

• DOWNLOAD support all the modes list in DOWNLOAD

  • You can find default used linker scripts for different download modes in SoC/evalsoc/Board/nuclei_fpga_eval/Source/GCC/.

    • evalsoc.memory: Memory information for evalsoc

    • gcc_evalsoc_sram.ld: Linker script file for DOWNLOAD=sram

    • gcc_evalsoc_flashxip.ld: Linker script file for DOWNLOAD=flashxip

  • If you want to specify your own modified linker script, you can follow steps described in Change Link Script

  • If you want to change the base address or size of SRAM, FlashXIP of linker script file, you can adapt the evalsoc.memory file.

• CORE support all the cores list in CORE

• Its openocd configuration file can be found in SoC/evalsoc/Board/nuclei_fpga_eval/openocd_evalsoc.cfg

To run this application in Nuclei FPGA Evaluation board in Nuclei N100 SDK, you just need to use this SOC and BOARD variables.

### For evalsoc
# Clean the application with DOWNLOAD=sram CORE=n100
make SOC=evalsoc BOARD=nuclei_fpga_eval DOWNLOAD=sram CORE=n100 clean
# Build the application with DOWNLOAD=sram CORE=n100
make SOC=evalsoc BOARD=nuclei_fpga_eval DOWNLOAD=sram CORE=n100 all
# Upload the application using openocd and gdb with DOWNLOAD=sram CORE=n100
make SOC=evalsoc BOARD=nuclei_fpga_eval DOWNLOAD=sram CORE=n100 upload
# Debug the application using openocd and gdb with DOWNLOAD=sram CORE=n100
make SOC=evalsoc BOARD=nuclei_fpga_eval DOWNLOAD=sram CORE=n100 debug
### For evalsoc
# Clean the application with DOWNLOAD=sram CORE=n100
make SOC=evalsoc BOARD=nuclei_fpga_eval DOWNLOAD=sram CORE=n100 clean
# Upload the application using openocd and gdb with DOWNLOAD=sram CORE=n100
make SOC=evalsoc BOARD=nuclei_fpga_eval DOWNLOAD=sram CORE=n100 upload

If you want to try other toolchain, such as nuclei llvm or terapines zcc, you can pass an extra TOOLCHAIN make variable.

Note

• You can change the value passed to CORE according to the Nuclei Demo SoC Evaluation Core the Nuclei FPGA SoC you have.

• You can also change the value passed to DOWNLOAD to run program in different modes.

• The FreeRTOS and UCOSII demos maybe not working in flashxip download mode in Nuclei FPGA board due to program running in Flash is really too slow. If you want to try these demos, please use sram download mode.