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Piotr Krzyzanowski

PROFILE

Piotr Krzyzanowski

Piotr Krzyżanowski developed and enhanced embedded benchmarking and driver validation frameworks across NordicBuilder/sdk-nrf, AmbiqMicro/ambiqzephyr, and zephyrproject-rtos/zephyr repositories. He engineered multicore power measurement, dynamic frequency switching, and robust test automation for peripherals such as SPI, PWM, and GPIO, leveraging C, Device Tree, and Zephyr RTOS. His work included implementing LED-based activity visualization, YAML-driven test harnesses, and overlay-based hardware configuration to improve observability and reliability. By expanding edge-case test coverage and automating validation for new hardware platforms, Piotr delivered maintainable, data-driven solutions that accelerated performance analysis, reduced regressions, and strengthened production readiness in embedded systems.

Overall Statistics

Feature vs Bugs

88%Features

Repository Contributions

26Total
Bugs
2
Commits
26
Features
14
Lines of code
4,008
Activity Months9

Work History

October 2025

1 Commits • 1 Features

Oct 1, 2025

October 2025: Delivered GPIO testing support for the NRF54H20 CPUPPR board by adding overlay files and configuring LED and GPIO hog settings to enable comprehensive GPIO driver tests and extend test coverage on new hardware, ensuring compatibility with existing test infrastructure.

July 2025

3 Commits • 2 Features

Jul 1, 2025

July 2025 monthly summary for AmbiqMicro/ambiqzephyr focusing on test automation and validation. Delivered extended API test coverage for clock control and enhanced PWM loopback tests across NRF platforms. These efforts strengthen reliability, early defect detection, and platform confidence ahead of production releases.

May 2025

1 Commits • 1 Features

May 1, 2025

May 2025 monthly wrap-up: Expanded SPI loopback test coverage in AmbiqMicro/ambiqzephyr by adding a NULL buffer test, strengthening driver reliability and edge-case handling with minimal maintenance. Validates spi_loopback_transceive behavior when both TX and RX buffers are NULL, reducing risk of regressions in SPI paths and improving production confidence.

April 2025

6 Commits • 2 Features

Apr 1, 2025

April 2025 performance summary for NordicBuilder/sdk-nrf: Delivered expanded low-power measurement capabilities and robust test coverage for LFRC clock sources and SPI wakeup, with targeted bug fixes that improve measurement accuracy, benchmarking reliability, and data-driven optimization of Nordic SoCs.

February 2025

5 Commits • 1 Features

Feb 1, 2025

February 2025 performance-focused iteration in NordicBuilder/sdk-nrf, driving cross-peripheral testing of dynamic Global Domain frequency switching and stabilizing multicore benchmarks.

January 2025

2 Commits • 1 Features

Jan 1, 2025

January 2025 monthly summary for NordicBuilder/sdk-nrf: Delivered Benchmarking Instrumentation and Test Suite Enhancements to improve visibility, measurement accuracy, and validation in multicore Nordic builds. Implemented visual LED indicators in multicore benchmarks for core/activity visualization and introduced a fast TIMER validation test suite to measure elapsed time across clock frequencies. The work is tracked by commits 750ddf47271c8169f1a4d01f7204db72a6db474c and 50601fe5dd4ff3a0e0b1c13edd35c989510ecfaf. Impact: faster performance analysis, quicker debugging, and more reliable multicore benchmarking; enables data-driven optimization and improved release readiness.

December 2024

1 Commits • 1 Features

Dec 1, 2024

December 2024 monthly summary for NordicBuilder/sdk-nrf focusing on power measurement observability improvements in multicore benchmarks.

November 2024

4 Commits • 2 Features

Nov 1, 2024

2024-11 Monthly Summary for NordicBuilder/sdk-nrf: Expanded benchmarking capabilities and improved stability, delivering clock control-enabled peripheral_load tests and a new power-consumption benchmark suite, while removing an obsolete Global Power Domains workaround to streamline CI. These efforts enhanced measurement accuracy, reduced flaky test behavior, and provided actionable data for hardware performance optimization.

October 2024

3 Commits • 3 Features

Oct 1, 2024

Concise monthly summary for 2024-10 highlighting delivered features, testability improvements, and cross-repo collaboration in embedded power/perf benchmarks. Focused on business value from power benchmarking and testability improvements across two repositories.

Activity

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Quality Metrics

Correctness85.8%
Maintainability85.0%
Architecture82.0%
Performance76.6%
AI Usage20.0%

Skills & Technologies

Programming Languages

CCMakeCMakeScriptDTSDevice TreeKconfigYAML

Technical Skills

BenchmarkingBuild SystemsC ProgrammingCI/CDCI/CD ConfigurationConfigurationDevice DriversDevice TreeDevice Tree ConfigurationDriver DevelopmentDriver TestingEmbedded SystemsEmbedded Systems TestingGPIOGPIO Control

Repositories Contributed To

4 repos

Overview of all repositories you've contributed to across your timeline

NordicBuilder/sdk-nrf

Oct 2024 Apr 2025
6 Months active

Languages Used

CCMakeKconfigYAMLDevice TreeCMakeScriptDTS

Technical Skills

BenchmarkingBuild SystemsDevice DriversEmbedded SystemsPower ManagementTesting

AmbiqMicro/ambiqzephyr

May 2025 Jul 2025
2 Months active

Languages Used

C

Technical Skills

Driver DevelopmentEmbedded SystemsTestingC ProgrammingDriver TestingHardware Configuration

kholia/zephyr

Oct 2024 Oct 2024
1 Month active

Languages Used

C

Technical Skills

Device DriversEmbedded SystemsHardware Configuration

zephyrproject-rtos/zephyr

Oct 2025 Oct 2025
1 Month active

Languages Used

C

Technical Skills

Device DriversEmbedded SystemsHardware TestingZephyr RTOS

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