lowRISC/opentitan
Aug 2025 – Jun 2026
8 Months active
Languages Used
HjsonSystemVerilogCHJSONPythonTclCSV
Technical Skills
Design VerificationFPGA designHardware DesignHardware VerificationIP IntegrationParameterization
Florian Glaser
PROFILE
Florian Glaser
Worked on the lowRISC/opentitan repository, delivering architectural improvements and automation for security-critical hardware modules and SoC integration. Focused on the CSRNG and CTR_DRBG paths, this developer unified data paths, streamlined verification, and enhanced error handling using SystemVerilog and C. They automated top-level port mapping and multi-power-domain configuration with Python and HJSON, enabling scalable integration across FPGA targets. Their work included refactoring module hierarchies, introducing cross-domain coordination, and expanding simulation support with Verilator. These efforts improved maintainability, reduced manual configuration risk, and strengthened test coverage, supporting robust hardware-software integration and efficient development cycles for complex digital systems.
Overall Statistics
Feature vs Bugs
89%Features
Repository Contributions
78Total
Bugs
2
Commits
78
Features
16
Lines of code
88,156
Activity Months8
Your Network
136 peopleWork History
June 2026
13 Commits • 3 Features
Jun 1, 2026June 2026 monthly summary for lowRISC/opentitan focused on delivering cross-Power Domain architecture and Verilator-based simulation enhancements, with emphasis on business value, cross-domain safety, and testability. The work strengthens multi-PD isolation, lint compliance, and validation coverage across Earlgrey and related variants, enabling safer design exploration and faster integration cycles.
13 Commits • 3 Features
Jun 1, 2026June 2026 monthly summary for lowRISC/opentitan focused on delivering cross-Power Domain architecture and Verilator-based simulation enhancements, with emphasis on business value, cross-domain safety, and testability. The work strengthens multi-PD isolation, lint compliance, and validation coverage across Earlgrey and related variants, enabling safer design exploration and faster integration cycles.
June 2026
May 2026
10 Commits • 2 Features
May 1, 2026May 2026 highlights: Implemented automatic multi-PD clock and reset path inference in Topgen, removing manual hier_paths and reducing misconfiguration risk. Overhauled multi-PD architecture across Earlgrey-related designs, introducing domain metadata, reorganized module hierarchy, and cross-board configuration regeneration to enable scalable power management. In parallel, updated environments, tests, and FPGA constraints to support the new topology. These changes improve maintainability, reduce setup time for new boards, and position the project to pursue further power optimization.
May 2026
10 Commits • 2 Features
May 1, 2026May 2026 highlights: Implemented automatic multi-PD clock and reset path inference in Topgen, removing manual hier_paths and reducing misconfiguration risk. Overhauled multi-PD architecture across Earlgrey-related designs, introducing domain metadata, reorganized module hierarchy, and cross-board configuration regeneration to enable scalable power management. In parallel, updated environments, tests, and FPGA constraints to support the new topology. These changes improve maintainability, reduce setup time for new boards, and position the project to pursue further power optimization.
April 2026
7 Commits • 3 Features
Apr 1, 2026April 2026 monthly summary for lowRISC/opentitan focusing on delivering cross-PD coordination, PD naming consistency, and DMA initialization improvements.
7 Commits • 3 Features
Apr 1, 2026April 2026 monthly summary for lowRISC/opentitan focusing on delivering cross-PD coordination, PD naming consistency, and DMA initialization improvements.
April 2026
March 2026
5 Commits • 1 Features
Mar 1, 2026March 2026 — lowRISC/opentitan: Delivered automation and maintainability improvements to support cross-target top-level integration for the Earlgrey family. Key efforts focused on unifying port map generation and instantiation across Earlgrey FPGA targets, English Breakfast, and general tops, removing hard-coded configurations, and enabling automated workflows via topgen/top-level HJSON. A parallel effort improved code readability in templates without altering functionality.
March 2026
5 Commits • 1 Features
Mar 1, 2026March 2026 — lowRISC/opentitan: Delivered automation and maintainability improvements to support cross-target top-level integration for the Earlgrey family. Key efforts focused on unifying port map generation and instantiation across Earlgrey FPGA targets, English Breakfast, and general tops, removing hard-coded configurations, and enabling automated workflows via topgen/top-level HJSON. A parallel effort improved code readability in templates without altering functionality.
November 2025
4 Commits • 2 Features
Nov 1, 2025November 2025 monthly summary focusing on delivering reliability, correctness, and streamlined verification for the opentitan CSRNG path and related interfaces.
4 Commits • 2 Features
Nov 1, 2025November 2025 monthly summary focusing on delivering reliability, correctness, and streamlined verification for the opentitan CSRNG path and related interfaces.
November 2025
October 2025
17 Commits • 2 Features
Oct 1, 2025October 2025 monthly summary for lowRISC/opentitan focusing on security-critical CSRNG and CTR_DRBG work. Delivered major architectural and verification improvements, unifying the CTR_DRBG path, simplifying control flows, and expanding NIST-compatible testing to strengthen security, interoperability, and reliability. The changes reduce complexity, improve testability, and drive performance and area benefits, with breaking API changes reflected in version 3.0.0 and accompanying reset requirements.
October 2025
17 Commits • 2 Features
Oct 1, 2025October 2025 monthly summary for lowRISC/opentitan focusing on security-critical CSRNG and CTR_DRBG work. Delivered major architectural and verification improvements, unifying the CTR_DRBG path, simplifying control flows, and expanding NIST-compatible testing to strengthen security, interoperability, and reliability. The changes reduce complexity, improve testability, and drive performance and area benefits, with breaking API changes reflected in version 3.0.0 and accompanying reset requirements.
September 2025
12 Commits • 1 Features
Sep 1, 2025For Sep 2025, delivered a broad CSRNG module refactor for opentitan across CTR_DRBG update and generate paths, the block encryption interface, and state management. The work focused on readability, naming consistency, data-path simplifications, and verification robustness, without altering external functionality. Key groundwork includes consolidating interfaces to block_encrypt, modernizing data paths with struct-based storage, and aligning DV/testbenches and documentation. These changes improve maintainability, enable faster future feature work, and preserve performance.
12 Commits • 1 Features
Sep 1, 2025For Sep 2025, delivered a broad CSRNG module refactor for opentitan across CTR_DRBG update and generate paths, the block encryption interface, and state management. The work focused on readability, naming consistency, data-path simplifications, and verification robustness, without altering external functionality. Key groundwork includes consolidating interfaces to block_encrypt, modernizing data paths with struct-based storage, and aligning DV/testbenches and documentation. These changes improve maintainability, enable faster future feature work, and preserve performance.
September 2025
August 2025
10 Commits • 2 Features
Aug 1, 2025August 2025 performance summary for lowRISC/opentitan CSRNG work. Delivered centralized parameter management and internal data-path refactor to improve consistency, maintainability, and verification rigor. Key changes consolidated CSRNG design parameters into csrng_pkg.sv, standardized top-level parameters, and derived NumApps from Hjson to unify hardware app count. Refined internal data paths (csrng_core_data_t) and updated data-path structures to support cleaner command/update paths, while tightening verification paths and reducing cmdreq FIFO usage. Completed a targeted removal of a large cmdreq FIFO to simplify architecture and reduce resource footprint. These changes collectively reduce configuration risk, improve DV coverage, and enable faster integration and testing across the project.
August 2025
10 Commits • 2 Features
Aug 1, 2025August 2025 performance summary for lowRISC/opentitan CSRNG work. Delivered centralized parameter management and internal data-path refactor to improve consistency, maintainability, and verification rigor. Key changes consolidated CSRNG design parameters into csrng_pkg.sv, standardized top-level parameters, and derived NumApps from Hjson to unify hardware app count. Refined internal data paths (csrng_core_data_t) and updated data-path structures to support cleaner command/update paths, while tightening verification paths and reducing cmdreq FIFO usage. Completed a targeted removal of a large cmdreq FIFO to simplify architecture and reduce resource footprint. These changes collectively reduce configuration risk, improve DV coverage, and enable faster integration and testing across the project.
Activity
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Quality Metrics
Correctness93.4%
Maintainability87.8%
Architecture92.8%
Performance86.0%
AI Usage26.4%
Skills & Technologies
Programming Languages
CCSVHJSONHjsonPythonSystemVerilogTcl
Technical Skills
C programmingCryptographyDesign VerificationDevice DriversDigital DesignDocumentationDriver DevelopmentEmbedded SystemsFPGAFPGA DevelopmentFPGA designFPGA developmentHJSON configurationHardware DesignHardware Verification
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