GroupGets LoFive R1 1

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This article describes specifics for the GroupGets LoFive R1.1 board based on a SiFive FE310.


Minimum requirements

Preparing for J-Link

GroupGets LoFive R1.1 does not come with a standard debug connector but populates the debug JTAG signals on a 2x14 Arduino compatible pin header. Therefore, it can be manually wired in case J-Link shall be connected to it.

The following guide will describe how the LoFive Board can be connected to your J-Link Base V10 or higher. Other J-Links might work as well but wiring might be slightly different. All needed information can be found in the probe related documentation.

  • The LoFive board does not come with the pin header populated so first the pin headers need to be soldered to your board.
  • Now connect the board with e.g. jumperwires to your J-Link probe.
  • The following table shows how the Signals should be connected on both the board and J-Link side.
J-Link 20 pin debug interface Pin on eval board Arduino header
Pin 1 (VTref) +3.3Vout
Pin 4 (GND) GND
Pin 5 (TDI) TDI
Pin 7 (TMS) TMS
Pin 9 (TCK) TCK
Pin 13 (TDO) TDO
Pin 19 (5V-Supply) +5Vin

The resulting connection will then look like this:


  • The use of the 5V-Supply pin on the J-Link is optional and can be used to power the target board through the J-Link. How is explained in the J-Link user guide UM08001. Alternatively you can connect an external 5 V power supply as well to the target board pin and use a second GND pin for the external power supply.
  • Verify the Connection with e.g. J-Link Commander. The output should look as follows:

Commander FE310.png

Debugging in SEGGER Embedded Studio

Example projects for SEGGER Embedded Studio

The following example project was created with the SEGGER Embedded Studio project wizard and runs out-of-the-box on the LoFive board. It is a simple Hello World sample and can be downloaded here:

Hello World sample