HiFive1 Rev B

by SiFive

An open source, RISC-V development platform with wireless connectivity

View all updates Mar 31, 2019

LED Pendulum Demo

Since we launched the campaign two weeks ago, we have over 300 backers of this project. The production run of the HiFive1 Rev Bs are well underway and the PCBs are being fabricated.

As a fun little project, one of our engineers, Nate, created an LED pendulum using an LED light ring and an accelerometer connected to the HiFive1 Rev B. The LED ring lights up based on the rotation of the platform.

The primary components for the project are

Running on Zephyr, the application that runs on HiFive1 Rev B reads the effect of gravity on the accelerometer over I2C and lights up the corresponding LED using the SPI controller. The demo code is available at https://github.com/sifive/hifive1-revb-pendulum along with the instructions on how to build the hardware.

Happy hacking.

$84,752 raised

of $1 goal

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Product Choices


HiFive1 Rev B

Get a single HiFive1 Rev B dev kit, featuring the FE310-G002, SiFive's second generation open source RISC-V 32-bit SoC.


HiFive1 Rev B Five-pack

What’s better than a single HiFive1 Rev B? Get one for you, and one for your friends!


Five-pack of SiFive FE310-G002 Chips

Five FE310-G002 chips to use as you wish. This is the same second-generation SiFive Freedom Everywhere 310 chip used on the HiFive1 Rev B board.



SiFive brings the power of open source and software automation to the semiconductor industry, making it possible to develop new hardware faster and more affordably than ever before. From the first RISC-V silicon (Freedom E310) to the first 4+1 Linux-capable RISC-V SoC (Freedom U540), SiFive continues to innovate and provide the most complete RISC-V solutions in the market. With our platform for rapidly designing, testing and building RISC‑V-based core IP and chips, we’re accelerating the pace of innovation for businesses large and small.

David Lee

Senior Product Marketing Manager

Naveed Sherwani


Yunsup Lee

Co-Founder and CTO

Krste Asanovic

Co-Founder and Chief Architect

Andrew Waterman

Co-Founder and Chief Engineer

Albert Huntington

Director of Engineering

Jack Kang

VP of Product and Business Development

Han Chen

Chief Engineer, Implementations and Methodology

Megan Wachs

VP of Hardware Engineering

David Patterson

Technical Advisor

Mark Horowitz

Technical Advisor

The Rest of the SiFive Team!

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