zephyrproject-rtos/trusted-firmware-m
Jan 2025 – Aug 2025
7 Months active
Languages Used
CCMakecmakeshellRSTShellrst
Technical Skills
Build SystemsEmbedded SystemsFirmware DevelopmentMemory ManagementRTOSC Programming
Ahmad EL JOUAID
PROFILE
Ahmad El Jouaid
Ahmad EL JOUAID contributed to the zephyrproject-rtos/trusted-firmware-m repository by developing and maintaining secure firmware update flows and platform support for STM32 microcontrollers. He engineered build system enhancements, refined memory partitioning, and integrated Trusted Firmware-M with STM32H5, U5, and WBA platforms, focusing on secure OTA updates and robust deployment. Using C, CMake, and embedded systems expertise, Ahmad addressed low-level issues such as flash memory management, cache handling, and driver updates. His work included documentation consolidation and regression test improvements, resulting in safer upgrades, improved build stability, and streamlined onboarding for developers working with secure embedded firmware on STM32 devices.
Overall Statistics
Feature vs Bugs
56%Features
Repository Contributions
28Total
Bugs
8
Commits
28
Features
10
Lines of code
33,078
Activity Months7
Your Network
96 people
Work History
August 2025
2 Commits • 1 Features
Aug 1, 2025August 2025: Key delivery focused on reliability and maintainability for STM32 TF-M builds. Delivered a bug fix to ensure correct handling of flash_layout.h offset during TF-M builds on stm32wba65i_dk, preventing non-secure apps from inadvertently using an offset of 0. Also consolidated STM32 platform documentation (U5, H5, L5, WBA) to reduce duplication and improve clarity. These efforts enhanced build correctness, security posture, and developer productivity.
2 Commits • 1 Features
Aug 1, 2025August 2025: Key delivery focused on reliability and maintainability for STM32 TF-M builds. Delivered a bug fix to ensure correct handling of flash_layout.h offset during TF-M builds on stm32wba65i_dk, preventing non-secure apps from inadvertently using an offset of 0. Also consolidated STM32 platform documentation (U5, H5, L5, WBA) to reduce duplication and improve clarity. These efforts enhanced build correctness, security posture, and developer productivity.
August 2025
June 2025
10 Commits • 2 Features
Jun 1, 2025June 2025 monthly summary for zephyrproject-rtos/trusted-firmware-m: Delivered cross-target enhancements, fixed reliability issues, and strengthened build stability. Focused on expanding testing coverage for STM32WBA/U5 via PSA API tests, addressing wake-up and cache-related issues to improve reliability in low-power and flash-heavy workflows, and performing HAL/OSPI maintenance to ensure smooth builds across STM32WBA6, U5, and H5 platforms. These efforts enable faster validation, reduce field issues, and broaden platform support for PSA testing and secure firmware validation.
June 2025
10 Commits • 2 Features
Jun 1, 2025June 2025 monthly summary for zephyrproject-rtos/trusted-firmware-m: Delivered cross-target enhancements, fixed reliability issues, and strengthened build stability. Focused on expanding testing coverage for STM32WBA/U5 via PSA API tests, addressing wake-up and cache-related issues to improve reliability in low-power and flash-heavy workflows, and performing HAL/OSPI maintenance to ensure smooth builds across STM32WBA6, U5, and H5 platforms. These efforts enable faster validation, reduce field issues, and broaden platform support for PSA testing and secure firmware validation.
May 2025
8 Commits • 3 Features
May 1, 2025May 2025 monthly summary for zephyrproject-rtos/trusted-firmware-m focused on STM32WBA platforms. Completed substantial build-system cleanup and platform hygiene, advanced TF-M image handling, and strengthened security isolation, contributing to more reliable upgrades and provisioning flows. Deliverables emphasized business value, safer memory management, and enhanced maintenance of the Trusted Firmware-M integration on STM32WBA-based targets.
8 Commits • 3 Features
May 1, 2025May 2025 monthly summary for zephyrproject-rtos/trusted-firmware-m focused on STM32WBA platforms. Completed substantial build-system cleanup and platform hygiene, advanced TF-M image handling, and strengthened security isolation, contributing to more reliable upgrades and provisioning flows. Deliverables emphasized business value, safer memory management, and enhanced maintenance of the Trusted Firmware-M integration on STM32WBA-based targets.
May 2025
April 2025
1 Commits • 1 Features
Apr 1, 2025April 2025: Delivered a targeted documentation improvement in zephyrproject-rtos/trusted-firmware-m to correct the STM32WBA65_DK product URL, improving developer onboarding and reducing confusion. This aligns product references with the correct page and preserves change traceability.
April 2025
1 Commits • 1 Features
Apr 1, 2025April 2025: Delivered a targeted documentation improvement in zephyrproject-rtos/trusted-firmware-m to correct the STM32WBA65_DK product URL, improving developer onboarding and reducing confusion. This aligns product references with the correct page and preserves change traceability.
March 2025
2 Commits • 1 Features
Mar 1, 2025March 2025: Delivered governance and platform-configuration improvements for Trusted Firmware-M in the Zephyr project. Strengthened maintainership, ensured TF-Mv2.2.0 compatibility on STM32 platforms, and reduced risk through targeted configuration fixes. The work enhances onboarding, memory partitioning accuracy, and build stability, enabling faster feature delivery and safer releases.
2 Commits • 1 Features
Mar 1, 2025March 2025: Delivered governance and platform-configuration improvements for Trusted Firmware-M in the Zephyr project. Strengthened maintainership, ensured TF-Mv2.2.0 compatibility on STM32 platforms, and reduced risk through targeted configuration fixes. The work enhances onboarding, memory partitioning accuracy, and build stability, enabling faster feature delivery and safer releases.
March 2025
February 2025
2 Commits
Feb 1, 2025February 2025: Strengthened firmware deployment reliability and platform readiness for STM32, delivering two major fixes and platform-wide configuration improvements. Key work included stabilizing the Firmware Update Service and updating regression tests for compatibility with the latest CubeProgrammer, plus upgrading the STM32WBA HAL drivers to v1.6.0 and aligning code with the new driver APIs. These changes enhance firmware update success rates, expand platform coverage, and improve regression accuracy, reducing field risk and supporting faster release cycles.
February 2025
2 Commits
Feb 1, 2025February 2025: Strengthened firmware deployment reliability and platform readiness for STM32, delivering two major fixes and platform-wide configuration improvements. Key work included stabilizing the Firmware Update Service and updating regression tests for compatibility with the latest CubeProgrammer, plus upgrading the STM32WBA HAL drivers to v1.6.0 and aligning code with the new driver APIs. These changes enhance firmware update success rates, expand platform coverage, and improve regression accuracy, reducing field risk and supporting faster release cycles.
January 2025
3 Commits • 2 Features
Jan 1, 2025January 2025 — Delivered two platform-specific updates for zephyrproject-rtos/trusted-firmware-m, focusing on robust and secure firmware updates for STM32 devices. Key features: (1) Firmware Update Partition support for STM32H5, including build system and flash layout updates; (2) Secure Firmware Update integration for STM32U5 (BL2/TFM), including partition addition and bootloader/TFM configuration. Major bugs fixed: resolved issues in Add Firmware Update partition flow on STM32U5 to ensure boot compatibility. Overall impact: enables secure OTA updates, improves deployment resilience, and reduces field update risk. Technologies/skills demonstrated: embedded firmware development, bootloaders (BL2), Trusted Firmware-M integration, STM32H5/U5, build system and flash layout updates, OTA/security.
3 Commits • 2 Features
Jan 1, 2025January 2025 — Delivered two platform-specific updates for zephyrproject-rtos/trusted-firmware-m, focusing on robust and secure firmware updates for STM32 devices. Key features: (1) Firmware Update Partition support for STM32H5, including build system and flash layout updates; (2) Secure Firmware Update integration for STM32U5 (BL2/TFM), including partition addition and bootloader/TFM configuration. Major bugs fixed: resolved issues in Add Firmware Update partition flow on STM32U5 to ensure boot compatibility. Overall impact: enables secure OTA updates, improves deployment resilience, and reduces field update risk. Technologies/skills demonstrated: embedded firmware development, bootloaders (BL2), Trusted Firmware-M integration, STM32H5/U5, build system and flash layout updates, OTA/security.
January 2025
Activity
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Quality Metrics
Correctness90.8%
Maintainability91.4%
Architecture89.4%
Performance81.8%
AI Usage20.0%
Skills & Technologies
Programming Languages
CCMakeRSTShellcmakerstshell
Technical Skills
Build SystemBuild System ConfigurationBuild SystemsC ProgrammingCMakeCache ManagementConfiguration ManagementCryptographyDevice DriversDocumentationDriver DevelopmentEmbedded SystemsFirmware DevelopmentFlash Memory ManagementHAL Driver Development
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