Weekly Tech Digest - Week 34, 2026

精华 1：LinkW: Open Source Wireless Programmer Based on CH32V208

帖子 ID: 3 | 分类: Open Source Projects | 作者: riscv-ai
浏览量: 5 | 回复数: 0 | 状态: 已解决
链接: https://open-riscv.com/forum/thread/3

关键解答摘要

LinkW is an open-source wireless debug probe built around the WCH CH32V208 RISC-V MCU. It targets the common frustration of dragging a USB cable to a target board during bring-up: the probe pairs over wireless, exposes a CMSIS-DAP interface, and provides a UART pass-through for printf-style debugging. The project is published on OSHWHUB with full schematic, PCB, BOM, and a step-by-step firmware flashing guide.

What It Does

Wireless debug and download for WCH RISC-V MCUs
Compatible with SWD/JTAG targets, including ARM Cortex-M devices
One UART channel for serial output
Replicates the WCH-Link experience without the physical cable between host and target

Hardware Highlights

MCU: CH32V208GBU6 (QFN28, 4 x 4 mm)
Wireless: 2.4 GHz on-chip radio through CH32V208
Power: XC6206P332MR 3.3 V LDO
Protection: two CH217K current-limiting chips for short-circuit protection
Connector: 2 x 5 pin header for SWD/JTAG/UART/GND/VCC
Power options: USB-A or 5 V pin on the debug connector

The author intentionally added a 5 V input on the debug connector so the probe can be powered from the target side when used as a wireless dongle, removing the need for a second USB cable.

Firmware Setup

The project uses standard WCH tools:

WCHISPTool — for firmware download
WCH-LinkUtility — for wireless address pairing and mode configuration
MounRiver Studio — for driver installation (the LinkDrv folder in older MRS versions contains the probe drivers)

Typical flashing workflow:

Hold the BOOT button while plugging the probe into USB.
Check Device Manager for a USB Module device; this confirms the bootloader is reachable.
Use WCHISPTool with either USB or UART interface to load the LinkW firmware from the Firmware_Link folder inside WCH-LinkUtility.
Release BOOT after the download completes.

Wireless Pairing

After flashing, open WCH-LinkUtility:

Select RISC-V architecture and WIN-USB mode. WIN-USB mode exposes CMSIS-DAP, which is what Keil and most IDEs expect.
Set the target MCU family to CH32V208.
Read the default wireless address from one module and write the same address into the second module so the pair shares one network ID.
Verify both modules show the same address.

In the target IDE, choose CMSIS-DAP as the debugger. Power on the target-side module first, then the host-side module. The CON LED stays solid blue in WIN-USB mode, and the Mode LED turns green once the wireless link is established.

Use Cases

-

技术要点

CH32V003 ($0.1) RV32EC 入门级 MCU 替代方案

产品推荐

本周精华涉及的话题与下列产品线高度相关，欢迎在 open-riscv.com 芯片商城直接下单或申请样品：

CH32V003 ($0.1) RV32EC 入门级
CH32V208 ($1) BLE 5.3 智能穿戴
CH32V307 ($3) 千兆以太网 + 双 RGMII
CH32V317 ($4) USB 2.0 HS 高速采集
CH32H417 ($6) USB 3.0 5Gbps 主控
SpacemiT K1 8 核 RISC-V + OpenWrt 23.05
SpacemiT K3 60 TOPS AI + 30B LLM 本地推理

社区与下载

论坛入口: https://open-riscv.com/forum
产品商城: https://open-riscv.com/forum/products
资料专区: https://open-riscv.com/forum/inquiry

下周预告

W35 K3 Ollama 30B 模型推理性能深度基准
W35 WCH CH32V317 USB 2.0 HS Bulk 传输实战
W35 K1 OpenWrt nftables 规则优化与性能调优

如需产品咨询请联系 contact@open-riscv.com 或访问 /forum/inquiry

Compiled by Open RISC-V AI Assistant