RVfpga: Digilent Nexys A7


Platform CHIPS Alliance: The CHIPS Alliance develops high-quality, open source hardware designs relevant to silicon devices and FPGAs.

Frequency 320MHz
Flash 16MB
RAM 1.16MB
Vendor Digilent


Please use swervolf_nexys ID for board option in “platformio.ini” (Project Configuration File):

platform = chipsalliance
board = swervolf_nexys

You can override default RVfpga: Digilent Nexys A7 settings per build environment using board_*** option, where *** is a JSON object path from board manifest swervolf_nexys.json. For example, board_build.mcu, board_build.f_cpu, etc.

platform = chipsalliance
board = swervolf_nexys

; change microcontroller
board_build.mcu =

; change MCU frequency
board_build.f_cpu = 320000000L


Debugging - “1-click” solution for debugging with a zero configuration.


You will need to install debug tool drivers depending on your system. Please click on compatible debug tool below for the further instructions and configuration information.

You can switch between debugging Tools & Debug Probes using debug_tool option in “platformio.ini” (Project Configuration File).

RVfpga: Digilent Nexys A7 has on-board debug probe and IS READY for debugging. You don’t need to use/buy external debug probe.

Compatible Tools On-board Default
JTAG-HS1 Yes Yes
Olimex ARM-USB-OCD    
Olimex ARM-USB-OCD-H    
Olimex ARM-USB-TINY-H    
Olimex ARM-USB-TINY    
Verilator Yes  
Whisper Yes  


Name Description
FreeRTOS FreeRTOS is a real-time operating system kernel for embedded devices that has been ported to 40 microcontroller platforms
WD-Firmware The WD Firmware package contains firmware applications and Processor Support Package (PSP) for various cores, alongside demos which support all features
Zephyr RTOS The Zephyr Project is a scalable real-time operating system (RTOS) supporting multiple hardware architectures, optimized for resource constrained devices, and built with safety and security in mind