espressif/esp-usb
Dec 2024 – Apr 2026
12 Months active
Languages Used
CC++CMakePythonMarkdownShellYAML
Technical Skills
Embedded SystemsFile SystemsUSBDriver DevelopmentStorageC Programming
igor.masar
PROFILE
Igor.masar
Igor Masar developed and maintained core USB features for the espressif/esp-usb repository, delivering new APIs, hardware support, and robust driver enhancements over a twelve-month period. He implemented device formatting, performance optimizations, and explicit FIFO configuration, using C and C++ to improve embedded system reliability and portability. Igor refactored hardware abstraction layers, expanded support to new microcontrollers like ESP32-H4 and ESP32-S31, and enhanced USB Type-C state management. His work included thorough documentation, Doxygen integration, and rigorous test coverage, resulting in a maintainable codebase that improved developer onboarding, device compatibility, and the stability of USB workflows across platforms.
Overall Statistics
Feature vs Bugs
69%Features
Repository Contributions
14Total
Bugs
4
Commits
14
Features
9
Lines of code
8,472
Activity Months12
Your Network
250 peopleSame Organization
@espressif.com209
Work History
April 2026
2 Commits • 1 Features
Apr 1, 2026April 2026 performance summary for espressif/esp-usb focused on expanding platform coverage and delivering a stable, documented release for USB Host on ESP32-S31. Implemented ESP32-S31 support in the USB Host manifest and docs, updated documentation targets and Kconfig reference generation to describe HS DWC_OTG capabilities, 16 host channels, and SPIRAM-backed host options. Released USB Host 1.4.0 with version bump and changelog updates, improving release readiness for customers adopting the ESP32-S31 target.
2 Commits • 1 Features
Apr 1, 2026April 2026 performance summary for espressif/esp-usb focused on expanding platform coverage and delivering a stable, documented release for USB Host on ESP32-S31. Implemented ESP32-S31 support in the USB Host manifest and docs, updated documentation targets and Kconfig reference generation to describe HS DWC_OTG capabilities, 16 host channels, and SPIRAM-backed host options. Released USB Host 1.4.0 with version bump and changelog updates, improving release readiness for customers adopting the ESP32-S31 target.
April 2026
March 2026
2 Commits • 1 Features
Mar 1, 2026March 2026 (2026-03) monthly summary for espressif/esp-usb. Focused on improving developer usability and USB reliability through documentation improvements and robust descriptor parsing. Highlights: - USB API Documentation and Developer Usability: added generated USB API and Kconfig references, aligned with ESP-IDF Doxygen style, refreshed public API comments and examples, and integrated references into usb_device.rst and usb_host.rst. No functional changes. - Hub Descriptor Handling and Device Compatibility: hardened parsing of hub descriptors by validating response lengths, safely caching received bytes, and logging warnings for unexpected descriptor types to improve compatibility with non-standard devices. These efforts reduce onboarding time, improve device compatibility, and support a more maintainable codebase.
March 2026
2 Commits • 1 Features
Mar 1, 2026March 2026 (2026-03) monthly summary for espressif/esp-usb. Focused on improving developer usability and USB reliability through documentation improvements and robust descriptor parsing. Highlights: - USB API Documentation and Developer Usability: added generated USB API and Kconfig references, aligned with ESP-IDF Doxygen style, refreshed public API comments and examples, and integrated references into usb_device.rst and usb_host.rst. No functional changes. - Hub Descriptor Handling and Device Compatibility: hardened parsing of hub descriptors by validating response lengths, safely caching received bytes, and logging warnings for unexpected descriptor types to improve compatibility with non-standard devices. These efforts reduce onboarding time, improve device compatibility, and support a more maintainable codebase.
February 2026
1 Commits • 1 Features
Feb 1, 2026February 2026 — Esp-usb: Delivered a beta USB Type-C TCPM with FUSB302 backend, enabling robust attach/detach detection, cable orientation, and power-role control across multiple ports. Implemented a shared worker-task runtime for multi-port IRQ handling and a clear install/uninstall lifecycle. Provided a pd_fusb302 example, target test app, manifests, docs, and licensing alignment. No major bug fixes were documented this month; primary focus was feature delivery, code quality, and comprehensive documentation. Impact: establishes a solid foundation for USB-C state management in Esp-usb, reducing integration risk and accelerating multi-port deployments. Technologies/skills demonstrated: USB Type-C TCPM design, FUSB302 backend integration, multi-port orchestration, API design, SDK integration, and thorough documentation.
1 Commits • 1 Features
Feb 1, 2026February 2026 — Esp-usb: Delivered a beta USB Type-C TCPM with FUSB302 backend, enabling robust attach/detach detection, cable orientation, and power-role control across multiple ports. Implemented a shared worker-task runtime for multi-port IRQ handling and a clear install/uninstall lifecycle. Provided a pd_fusb302 example, target test app, manifests, docs, and licensing alignment. No major bug fixes were documented this month; primary focus was feature delivery, code quality, and comprehensive documentation. Impact: establishes a solid foundation for USB-C state management in Esp-usb, reducing integration risk and accelerating multi-port deployments. Technologies/skills demonstrated: USB Type-C TCPM design, FUSB302 backend integration, multi-port orchestration, API design, SDK integration, and thorough documentation.
February 2026
January 2026
1 Commits
Jan 1, 2026January 2026 (2026-01): espressif/esp-usb – FTDI VCP driver robustness enhancements. Implemented fixes to correct bitfield interpretation and added data length validation prior to parsing SerialState, boosting reliability of USB-serial data handling and reducing edge-case failures.
January 2026
1 Commits
Jan 1, 2026January 2026 (2026-01): espressif/esp-usb – FTDI VCP driver robustness enhancements. Implemented fixes to correct bitfield interpretation and added data length validation prior to parsing SerialState, boosting reliability of USB-serial data handling and reducing edge-case failures.
October 2025
1 Commits • 1 Features
Oct 1, 20252025-10 Monthly Summary: ESP32-H4 USB support added to espressif/esp-usb (Device and Host) with explicit DP/DM pin mapping and H4 PHY considerations. Feature gating updated to include ESP32-H4; docs, examples, and pin-map references updated. No major bugs fixed this month; focus on hardware support expansion and documentation to accelerate developer onboarding and broaden USB use cases.
1 Commits • 1 Features
Oct 1, 20252025-10 Monthly Summary: ESP32-H4 USB support added to espressif/esp-usb (Device and Host) with explicit DP/DM pin mapping and H4 PHY considerations. Feature gating updated to include ESP32-H4; docs, examples, and pin-map references updated. No major bugs fixed this month; focus on hardware support expansion and documentation to accelerate developer onboarding and broaden USB use cases.
October 2025
September 2025
1 Commits • 1 Features
Sep 1, 2025September 2025: Delivered ESP32-H4 support for esp-usb, expanding hardware compatibility and enabling Full-Speed operation with sensible defaults. Implemented MSC buffer size/range defaults, added ESP32-H4 target to idf_component.yml, and updated CHANGELOG to document the new support. The commit provides a production-ready extension with clear release notes and preparation for downstream testing.
September 2025
1 Commits • 1 Features
Sep 1, 2025September 2025: Delivered ESP32-H4 support for esp-usb, expanding hardware compatibility and enabling Full-Speed operation with sensible defaults. Implemented MSC buffer size/range defaults, added ESP32-H4 target to idf_component.yml, and updated CHANGELOG to document the new support. The commit provides a production-ready extension with clear release notes and preparation for downstream testing.
June 2025
1 Commits • 1 Features
Jun 1, 2025June 2025: Delivered a strategic USB PHY refactor and internal API migration for espressif/esp-usb, enabling better hardware control and unified code organization. Key changes include moving USB PHY source and header from usb/ to esp_hw_support, replacing public GPIO driver APIs with internal Low-Level (LL) APIs, removing deprecated PHY helper functions, and consolidating SoC-specific declarations. This work reduces API surface, enhances maintainability, and sets the stage for faster, more reliable USB feature delivery across supported platforms.
1 Commits • 1 Features
Jun 1, 2025June 2025: Delivered a strategic USB PHY refactor and internal API migration for espressif/esp-usb, enabling better hardware control and unified code organization. Key changes include moving USB PHY source and header from usb/ to esp_hw_support, replacing public GPIO driver APIs with internal Low-Level (LL) APIs, removing deprecated PHY helper functions, and consolidating SoC-specific declarations. This work reduces API surface, enhances maintainability, and sets the stage for faster, more reliable USB feature delivery across supported platforms.
June 2025
May 2025
1 Commits
May 1, 2025May 2025 monthly summary focused on cross-architecture log formatting portability improvements in the USB host controller. A targeted fix was applied to esp-usb (USB host controller) to ensure log messages handling FIFO line sizes are correctly formatted on all architectures by replacing the generic %u with PRIu32, without changing runtime behavior.
May 2025
1 Commits
May 1, 2025May 2025 monthly summary focused on cross-architecture log formatting portability improvements in the USB host controller. A targeted fix was applied to esp-usb (USB host controller) to ensure log messages handling FIFO line sizes are correctly formatted on all architectures by replacing the generic %u with PRIu32, without changing runtime behavior.
April 2025
1 Commits • 1 Features
Apr 1, 2025April 2025: Implemented explicit FIFO configuration for the USB Host Controller Driver via HAL API in espressif/esp-usb, enabling manual sizing of RX, Non-Periodic TX, and Periodic TX FIFOs with a Kconfig-based default fallback. This replaces the prior bias-based sizing and lays the groundwork for tunable performance and stability across USB data paths. No major bugs were reported this month; ongoing work focuses on HAL-driven configurability and throughput optimizations.
1 Commits • 1 Features
Apr 1, 2025April 2025: Implemented explicit FIFO configuration for the USB Host Controller Driver via HAL API in espressif/esp-usb, enabling manual sizing of RX, Non-Periodic TX, and Periodic TX FIFOs with a Kconfig-based default fallback. This replaces the prior bias-based sizing and lays the groundwork for tunable performance and stability across USB data paths. No major bugs were reported this month; ongoing work focuses on HAL-driven configurability and throughput optimizations.
April 2025
March 2025
1 Commits
Mar 1, 2025Monthly summary for 2025-03: Focused on correcting USB host error handling in espressif/esp-usb and aligning API return values with actual behavior. Delivered a bug fix for closing unopened devices and updated documentation to reflect the correct return values, reducing integration issues and improving developer trust. This work reinforces the USB host reliability and supports downstream application stability.
March 2025
1 Commits
Mar 1, 2025Monthly summary for 2025-03: Focused on correcting USB host error handling in espressif/esp-usb and aligning API return values with actual behavior. Delivered a bug fix for closing unopened devices and updated documentation to reflect the correct return values, reducing integration issues and improving developer trust. This work reinforces the USB host reliability and supports downstream application stability.
February 2025
1 Commits • 1 Features
Feb 1, 2025February 2025: Delivered TinyUSB MSC Driver Performance and Reliability Enhancements in espressif/esp-usb. Implemented caching of sector size and count to reduce redundant calls and added storage buffering for write operations, deferring actual writes to a dedicated task. This improves responsiveness and reliability of the USB Mass Storage interface, reduces CPU overhead, and enhances overall storage throughput in embedded USB workflows.
1 Commits • 1 Features
Feb 1, 2025February 2025: Delivered TinyUSB MSC Driver Performance and Reliability Enhancements in espressif/esp-usb. Implemented caching of sector size and count to reduce redundant calls and added storage buffering for write operations, deferring actual writes to a dedicated task. This improves responsiveness and reliability of the USB Mass Storage interface, reduces CPU overhead, and enhances overall storage throughput in embedded USB workflows.
February 2025
December 2024
1 Commits • 1 Features
Dec 1, 2024December 2024: Delivered the Mass Storage Class (MSC) host device formatting capability in the espressif/esp-usb repository, enabling a public API to format MSC devices and ensuring correct data removal during formatting. Implemented the public API function msc_host_vfs_format and added tests to verify that formatting reliably clears existing data, reducing manual steps and data remnants in MSC workflows. This work enhances device provisioning reliability and supports broader USB mass-storage use cases.
December 2024
1 Commits • 1 Features
Dec 1, 2024December 2024: Delivered the Mass Storage Class (MSC) host device formatting capability in the espressif/esp-usb repository, enabling a public API to format MSC devices and ensuring correct data removal during formatting. Implemented the public API function msc_host_vfs_format and added tests to verify that formatting reliably clears existing data, reducing manual steps and data remnants in MSC workflows. This work enhances device provisioning reliability and supports broader USB mass-storage use cases.
Activity
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Quality Metrics
Correctness96.4%
Maintainability91.4%
Architecture95.8%
Performance89.2%
AI Usage21.4%
Skills & Technologies
Programming Languages
CC++CMakeMarkdownPythonShellYAML
Technical Skills
API designC ProgrammingC programmingC++DebuggingDoxygenDriver DevelopmentEmbedded SystemsFile SystemsHardware Abstraction Layer (HAL)KconfigMicrocontroller DevelopmentPortabilityRefactoringStorage
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