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.

$171,649 raised

of $1 goal

Funded! Order Below

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.


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 is the leading provider of processor cores, accelerators, and SoC IP to create domain-specific architecture based on the free and open RISC-V instruction set architecture. SiFive offers scalable, configurable processor cores pre-integrated with security, trace, and debug features for workload-specific accelerator designs. Founded by the inventors of RISC-V, SiFive has 15 design centers worldwide and backing from Sutter Hill Ventures, SK Hynix, Qualcomm Ventures, Western Digital, Intel Capital, Spark Capital, Osage University Partners, and Prosperity7 Ventures.

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!

Makers and Hackers

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