bfd-register-capture

name	bfd-register-capture
description	Use when sampling STM32 peripheral registers, tracking register changes over time, or exporting register snapshots to CSV for hardware-state analysis.

BFD Register Capture

Self-Improvement Loop (Required)

• When this skill encounters a build, flash, debug, script-usage, or other workflow problem, do not stop at the local workaround after the issue is solved.
• Record the resolved issue and lesson in BFD-Kit/.learnings/ERRORS.md and/or BFD-Kit/.learnings/LEARNINGS.md; unresolved capability gaps go to BFD-Kit/.learnings/FEATURE_REQUESTS.md.
• Promote reusable fixes into the affected BFD-Kit asset in the same task when feasible: update the relevant SKILL.md, script, wrapper, or resource so the next run benefits by default.
• When a learning is promoted into a skill or script, append a short entry to BFD-Kit/.learnings/CHANGELOG.md and mention the improvement in the task close-out.

Use this skill to capture register evidence with repeatable scripts.

Quick Start

1. Run bootstrap profile first.
2. Select peripheral and register set.
3. Capture short first, then extend duration.

Core Commands

# 0) Bootstrap profile (required)
python3 ./.codex/skills/bfd-project-init/scripts/bootstrap.py --project-root . --mode check

# USART1, 1 second
./.codex/skills/bfd-register-capture/scripts/capture_registers.sh -p USART1 -d 1 -o logs/debug/usart1_1s.csv

# FDCAN1 key status registers
./.codex/skills/bfd-register-capture/scripts/capture_registers.sh -p FDCAN1 -r CCCR,PSR,ECR,IR,TXBRP,RXF0S -d 5 -o logs/debug/fdcan1_status.csv

# Fast status check
./.codex/skills/bfd-register-capture/scripts/capture_registers.sh -p FDCAN1 -s

# High-frequency batch capture
./.codex/skills/bfd-register-capture/scripts/jlink_batch_capture.sh USART1 10 logs/debug/usart1_batch.csv

Workflow

1. Run bootstrap profile.
2. Define peripheral and registers.
3. Run short validation capture.
4. Run production capture and export CSV.

Hard Rules

• Fail-fast if bootstrap profile is missing.
• Save final captures under logs/debug/.
• Do not sample unknown peripheral addresses.
• Treat zero-sample output as failed capture.

Scripts

• .codex/skills/bfd-register-capture/scripts/capture_registers.sh
• .codex/skills/bfd-register-capture/scripts/capture_registers.ps1
• .codex/skills/bfd-register-capture/scripts/jlink_batch_capture.sh
• .codex/skills/bfd-register-capture/scripts/jlink_fast_capture.py

Related Skills

• bfd-project-init
• bfd-debug-executor
• bfd-rtt-logger
• bfd-data-acquisition