Shiny and New: the SPI to AXI4-Lite Bridge

Following a user request, we have created an open-source SPI to AXI4-Lite bridge which allows you to access register banks generated by airhdl.com from any microcontroller over a Serial Peripheral Interface (SPI).

SPI to AXI4-Lite Bridge

The bridge is available in both VHDL and SystemVerilog versions, and comes as a single, self-contained file with no additional dependencies. It supports all four combinations of SPI clock phases and polarities, also known as SPI modes.

The source-code repository includes a VHDL testbench that was developed using the Open-Source VHDL Verification Methodology (OSVVM). The simulation requires a VHDL-2008 capable simulator such as Aldec Riviera-Pro.

We are releasing the SPI to AXI4-Lite bridge under a permissive Apache License 2.0, which allows you to use it in commercial applications.

Please feel free to try it out and let us know what you think!

Published by

Guy Eschemann

Founder and CEO at noasic GmbH.