SparkFun RED-V Thing Plus - SiFive RISC-V FE310 SoC

The SparkFun RED-V (pronounced “red-five”) Thing Plus is a low-cost, development board in our popular Thing Plus footprint and adds in the Freedom E310 core and RISC-V instruction set architecture (ISA). What sets the RED-V Thing Plus apart is the completely open-source approach from hardware to ISA. That means anyone can make full use the microcontroller without requiring royalties, licenses, or non-disclosure agreements.

The RED-V Thing Plus comes programmed with a simple bootloader The modern USB-C connector makes it easy to program over USB connectivity or use as a JTAG interface via the FE310's NXP K22 ARM Cortex-M4. For more advanced users who prefer to use the power and speed of professional tools, we've also exposed the JTAG connector. Since the Thing Plus footprint is also Feather-compatible, you can take advantage of existing shield options. We have included a Qwiic connector to enable future use of our handy plug-and-play I2C Qwiic Connect System which means no soldering or shields are required*. With so much freedom & growing industry functionality, the SparkFun RED-V Thing Plus is an ideal choice for your RISC-V project.

The on board Freedom E310 (FE310) is the first member of the Freedom Everywhere family of customizable SoCs from SiFive. Designed for microcontroller, embedded, IoT, and wearable applications, the FE310 features SiFive’s E31 CPU Coreplex, a high-performance, 32-bit RV32IMAC core. Running at 150MHz, the FE310 is among the fastest microcontrollers in the market. Additional features include a 16KB L1 Instruction Cache, a 16KB Data SRAM scratchpad, hardware multiply/divide, a debug module, flexible clock generation with on-chip oscillators and PLLs, and a wide variety of peripherals including UARTs, QSPI, PWMs, and timers. Multiple power domains and a low-power standby mode ensure a wide variety of applications can benefit from the FE310. The RED-V Thing Plus requires Freedom Studio software or a Zephyr RTOS build environment set up to program the board and interface with it.

Note: Please be aware that Qwiic Libraries are not yet available for the Freedom Studio SDK or the Zephyr environment that runs on the FE310. We will continue to update the community as these become available.

  • Feather Compatible Footprint
  • Microcontroller: SiFive Freedom E310 (FE310)
    • CPU: SiFive E31 CPU
    • Architecture: 32-bit RV32IMAC
    • Speed: 150MHz
    • Performance: 1.61 DMIPs/MHz
    • Memory: 16 KB Instruction Cache, 16 KB Data Scratchpad
    • Other Features: Hardware Multiply/Divide, Debug Module, Flexible Clock Generation with on-chip oscillators and PLLs
  • Operating Voltage: 3.3 V and 1.8 V
  • External Wakeup Pins: 1 (& button)
  • Host Interface (USB-C): Program, Debug, and Serial Communication
  • Qwiic Connector

SparkFun RED-V Thing Plus - SiFive RISC-V FE310 SoC Product Help and Resources

New!

RED-V Thing Plus Hookup Guide

November 22, 2019

This guide will go over the hardware of the RED-V Thing Plus.
New!

RED-V Development Guide

November 27, 2019

This guide will help you get the RED-V RedBoard or Thing Plus up and running for the exhaust port. Depending on personal preference, there are a few environments to get started with the boards. All wings report in... we're going in full-throttle.

Core Skill: Programming

If a board needs code or communicates somehow, you're going to need to know how to program or interface with it. The programming skill is all about communication and code.

5 Programming

Skill Level: Expert - You should be extremely comfortable programming on various hardware in several languages.
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Core Skill: Electrical Prototyping

If it requires power, you need to know how much, what all the pins do, and how to hook it up. You may need to reference datasheets, schematics, and know the ins and outs of electronics.

2 Electrical Prototyping

Skill Level: Rookie - You may be required to know a bit more about the component, such as orientation, or how to hook it up, in addition to power requirements. You will need to understand polarized components.
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  • Assuming Q1 in the schematic is a p-FET to cut power from battery when USB is applied, it is placed incorrectly in the schematic: the source should be on the high side and the drain should be on the low side. As it is now, the source/drain protection diode in most discrete FETs will pass current in that polarity regardless of what is going on at the gate voltage.

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