bfd-strtt-rtt

name	bfd-strtt-rtt
description	Use when capturing SEGGER RTT over ST-Link via memory polling, or when implementing and diagnosing strtt-style RTT control-block scanning and ring-buffer polling.

BFD STRTT RTT

Use this skill for polling-based ST-Link RTT workflows inspired by strtt. This skill is independent from J-Link RTT and independent from J-Link HSS.

Quick Start

python3 ./.codex/skills/bfd-project-init/scripts/bootstrap.py --project-root . --mode check

python3 BFD-Kit/scripts/bfd_stlink_rtt.py \
  --elf "${STM32_ELF}" \
  --role boot \
  --duration 5 \
  --output logs/rtt/stlink_rtt.log

Core Pattern

• Resolve _SEGGER_RTT from ELF when possible.
• Fall back to scanning STM32_RTT_SCAN_WINDOW for "SEGGER RTT".
• Parse SEGGER_RTT_CB and buffer descriptors.
• Poll unread bytes from the selected up-buffer.
• Write back RdOff after host-side consumption.

Hard Rules

• This path is RTT polling, not HSS.
• Prefer it for textual boot/diag/runtime evidence, not for high-rate scalar sampling.
• If no usable payload is captured, fall back to bfd-data-acquisition.
• If the probe is J-Link, use bfd-rtt-logger for native J-Link RTT instead of this skill.

Related Skills

• bfd-rtt-logger
• bfd-stlink-interface
• bfd-data-acquisition