Building the tools
RISC-V is missing.

Crimspire is an embedded hardware company focused on the RISC-V ecosystem. We make debug probes, compute boards, and certified modules — the connective tissue between hobbyist boards and production hardware.

See HartProbe →
Founded 2024
Location Indianapolis, IN
Focus RISC-V Embedded Systems
Model Open Source Hardware
First Product HartProbe V1.0
Entity Crimspire LLC
HartProbe V1.0 — RISC-V Debug & Flash Probe Now in Development
RISC-V Carrier Board · Open Source · Sub-$55

HartProbe V1.0

Flash your board in 30 seconds. No drivers. No licensing. No J-Link.

View on GitHub Specifications
Sub-$55

Competitive with J-Link EDU with no licensing restrictions. Own your toolchain.

Zero-Config

Pre-built OpenOCD profiles for Milk-V, VisionFive 2, and StarFive boards.

Open Source

STM32-based firmware published on GitHub. Fork it. Own it.

Built in Public

Open Hardware

Every layer of HartProbe is open. Firmware, schematics, and board profiles — all on GitHub under permissive licenses.

  • Firmware — MIT license
  • KiCad schematics — CERN-OHL
  • OpenOCD configs — GPL-2.0
  • Documentation — CC BY 4.0
Hart Series Roadmap
01 / PROBE
HartProbe
RISC-V Debug & Flash Probe
In Development
02 / COMPUTE
HartBoard
RISC-V Robotics Compute Board
Coming Soon
03 / MODULE
HartModule
Certified RISC-V SoM
Roadmap
Technical Specifications
Host InterfaceUSB 2.0 Full Speed (CDC)
Debug ProtocolsJTAG · SWD · cJTAG
Target Voltage1.8V – 5V (selectable)
Max JTAG Clock10 MHz
FirmwareOpen source, STM32F103-based
SoftwareOpenOCD · GDB · pyOCD compatible
Board ProfilesMilk-V Duo/Mars · VisionFive 2 · StarFive JH7110
Form Factor35 × 18 mm · USB-C connector
Tested Boards
Milk-V Duo (64MB / 256MB)
Milk-V Mars (JH7110)
VisionFive 2 (StarFive JH7110)
StarFive VisionFive v1
Generic RISC-V JTAG targets