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67-gdsii-generator
This is the technical specification. The deliverable it describes is the full 67-gdsii-generator blueprint package.
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Status: Ready for distribution — version 2.0.0-STANDALONE
Status: Ready for distribution — version 2.0.0-STANDALONE
The GDSII Generator is a self-contained, zero-dependency Python tool that reads foundry delivery specification files and produces binary GDSII Stream version 6 layout files ready for tape-out handoff to any foundry. It ships as a standalone CD image (with Windows autorun) that can be used with any
FOUNDRY_DELIVERY_PACKAGE_* folder—whether the customer has one package or dozens spread across different machines. The generator creates a die-outline boundary on GDSII layer 1 and a power ring boundary on GDSII layer 2 for each design, using die dimensions extracted from the specification file. Generated layouts are compatible with all major EDA tool suites, including Cadence Virtuoso, Synopsys IC Compiler, and any tool that reads GDSII v6 binary streams.The entire tool uses only the Python standard library—there is nothing to
Read section 3 for $1.90pip install. It requires Python 3.6 or higher and runs on Windows, Linux, and macOS. A top-level PowerShell orchestrator (Make-GDSII.ps1) wraps the three Python scripts into a single command with environment checks, generation, and verification.The binary writer in
Read section 4 for $1.90FAILSAFE_GDSII_GENERATOR.py emits these GDSII record types in sequence:Each generated
Read section 5 for $1.90.gds file contains a single top-level cell named after the design. Inside the cell are exactly two BOUNDARY elements:The
Read section 6 for $1.90extract_die_size() function in FAILSAFE_GDSII_GENERATOR.py searches specification key-value pairs for any of the following field names (case-insensitive): area, die_area, die_size, chip_area, chip_size. It parses WxH notation (e.g. 2.5mm x 3.0mm or 500um x 800um), converting millimetre values to microns by multiplying by 1000. If no parseable size is found, the generator defaults to 1000 × 1000 μm.When the user does not provide a
Read section 7 for $1.90--package argument, both FAILSAFE_GDSII_GENERATOR.py and CHECK_SETUP.py run the find_foundry_package() function, which searches these locations in order:At each location, it checks one level of subdirectories (then two levels) for any folder whose name contains
Read section 8 for $1.90FOUNDRY_DELIVERY_PACKAGE (case-insensitive) and that contains a SPECIFICATIONS subfolder with at least one .txt file. PermissionError exceptions during the two-level scan are silently skipped.VERIFY_GDSII.py is a standalone verification script (no imports beyond sys, struct, and pathlib) that can check a single .gds file or scan an entire directory. For each file it validates:Output uses Unicode check/cross marks and reports per-file validity plus a final tally of valid vs. invalid counts. Exit code is 0 when all files pass, 1 when any file fails.
Read section 10 for $1.90The binary GDSIIÂ v6 files produced by this generator are compatible with:
Read section 11 for $1.90The top-level entry point for power users. It wraps all three Python scripts into a single command and adds pre-flight checks that catch the most common failure modes before wasting a long run:
Read section 12 for $1.90The orchestrator performs these steps in sequence:
Read section 13 for $1.90Helper functions
Read section 14 for $1.90Write-Step, Write-Ok, Write-Warn2, and Write-Bad provide colour-coded console output (Cyan/Green/Yellow/Red).An interactive menu-driven launcher for users who prefer not to use the command line. It presents six numbered options:
Read section 15 for $1.90Before showing the menu, it prompts for the foundry package path (or Enter to auto-detect). Uses
Read section 16 for $1.90setlocal enabledelayedexpansion for proper variable expansion inside if blocks.AUTORUN.inf is a standard Windows autorun configuration. It sets the disc label to GDSII Generator - Standalone CD, declares no media files (MusicFiles=0, PictureFiles=0, VideoFiles=0), and launches GDSII_GENERATOR\RUN_GDSII_GENERATION.bat on disc insertion.Module-level constants:
Read section 18 for $1.90VERSION = "2.0.0-STANDALONE", SCRIPT_NAME = "FAILSAFE_GDSII_GENERATOR", SCRIPT_DIR, CONFIG_FILE, LOG_FILE, PROGRESS_FILE.Imports (all standard library):
Read section 19 for $1.90os, sys, json, struct, shutil, pathlib.Path, datetime.datetime, argparse, traceback.Imports:
Read section 20 for $1.90sys, os, argparse, pathlib.Path.Imports:
Read section 21 for $1.90sys, struct, pathlib.Path.Parameters:
Read section 22 for $1.90$Package (string), $Design (string), $Output (string), $Resume (switch), $CheckOnly (switch). Uses $ErrorActionPreference = 'Stop'.12 files across 3 directories. Total source: 1,956 lines. Estimated disc size: 50–100 KB.
Read section 23 for $1.90This package ships on a single Blu-ray disc, posted to the delivery address on your order. The archive on the disc is AES-256 encrypted; the passphrase is sent separately, by email, once the disc is despatched — so the disc alone is of no use to anyone who intercepts it.
Read section 24 for $1.90Discs are despatched by tracked, signed-for post. Allow 5 business days for mastering and verification before despatch.
Read section 25 for $1.90