Month: 2026-01 | levizh/rt-thread: Key USB improvements and stability fixes. Delivered a major USB stack upgrade and a critical host controller fix, reinforcing device compatibility and reliability for production deployments.

August 2025 performance summary focusing on USB subsystem improvements across two repositories. The work delivered strengthens USB stability, compatibility, and developer productivity, delivering measurable business value for product readiness and time-to-market.

July 2025 performance summary focusing on USB framework enhancements, versioning utilities, and cross-repo portability. Key deliverables include CherryUSB framework enhancements and v1.5.1 release in levizh/rt-thread, adding CDC ACM device framework enhancements, host serial support, DFS read/write return type fixes, WebUSB descriptor length fixes, DWC2 GCCCFG configurations, and a dynamic FIFO sizing/DMA mode refactor with support for new STM32 and AT32 families. In OpenSiFli/SiFli-SDK, introduced RT_VERSION_CHECK macro in rtdef.h to enable version-based conditional compilation. The combined work improves USB stack reliability, hardware coverage, and build-time maintainability across RT-Thread-based projects.

June 2025: Implemented a comprehensive CherryUSB driver and firmware upgrade to v1.5.0 across the levizh/rt-thread repository, consolidating the upgrade across multiple files to improve device compatibility and performance. The change positions the project for smoother hardware integration and future feature work while maintaining focus on stability and maintainability.

In March 2025, levizh/rt-thread focused on strengthening USB stack reliability and broadening platform support. The CherryUSB upgrade to v1.4.3 introduced enhanced USB controller support, refined Mass Storage Class readiness checks, expanded driver support (Asix, RTL8152, BL616), and OS compatibility improvements, accompanied by a threading refactor for better cross-OS behavior. A targeted bug fix corrected the USBD_IRQHandler argument handling on nRF5x, enabling proper USB interrupt management. These changes collectively improve hardware compatibility, stability, and maintainability, delivering more robust USB functionality across supported platforms.

December 2024 monthly summary for levizh/rt-thread: Delivered a targeted upgrade of the CherryUSB library to v1.4.2, adding Kendryte K230 device support and Android Open Accessory (AOA) functionality. Implemented across build and integration surfaces—including updates to Kconfig, READMEs, and SConscript—and introduced new AOA class files. The change set centers on expanding hardware compatibility and enabling Android accessory workflows, anchored by commit 243854a35367cd741398feaffbdad11deac8fb28 (update(cherryusb): update to v1.4.2).