peripheral-config

peripheral-config is a skill for Claude Code, Codex from bahaabdelwahed/embedded-claude-plugin. It costs 105 tokens per session (1,310 once invoked), scanned A, original, MIT.

A set of instructions for configuring STM32 microcontroller peripherals such as GPIO, UART, SPI, I2C, timers, USB, CAN, and DMA. It extracts the required register settings and pin mappings from reference manuals and datasheets.

In plain words
What is it for?
Use it when initializing or debugging an STM32 peripheral. It helps identify clock, pin, register, interrupt, DMA, and enable settings from PDFs in the project's docs folder.
Why use it?
It reduces the chance of missing dependent setup steps, such as enabling a clock before accessing a peripheral or selecting the correct pin function.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it when initializing or debugging an STM32 peripheral. It helps identify clock, pin, register, interrupt, DMA, and enable settings from PDFs in the project's docs folder.

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Install with agentmods
npx agentmods add skills/bahaabdelwahed/embedded-claude-plugin/peripheral-config
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add bahaabdelwahed/embedded-claude-plugin --skill peripheral-config
Clone the repo
git clone --depth 1 https://github.com/bahaabdelwahed/embedded-claude-plugin

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for peripheral-config

README.md
[![agentmods](https://agentmods.dev/badge/skills/bahaabdelwahed/embedded-claude-plugin/peripheral-config/github.svg)](https://agentmods.dev/skills/bahaabdelwahed/embedded-claude-plugin/peripheral-config)
Your own site
<a href="https://agentmods.dev/skills/bahaabdelwahed/embedded-claude-plugin/peripheral-config"><img src="https://agentmods.dev/badge/skills/bahaabdelwahed/embedded-claude-plugin/peripheral-config/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for peripheral-config

Your own site · 80×15
<a href="https://agentmods.dev/skills/bahaabdelwahed/embedded-claude-plugin/peripheral-config"><img src="https://agentmods.dev/badge/skills/bahaabdelwahed/embedded-claude-plugin/peripheral-config.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 105 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,310 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00105 $0.01310
Opus 5 $0.00053 $0.00655
Sonnet 5 $0.00021 $0.00262
Haiku 4.5 $0.00011 $0.00131

Measured 9d ago against content hash 0cf839d761dd, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

peripheral-config scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 9d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/peripheral-config/SKILL.md · 123 lines

How it starts

The opening of the file, as written. The whole thing — 123 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Peripheral Configuration Extraction

Extract register-level peripheral configuration procedures from STM32 reference manual and datasheet PDFs.

Universal Peripheral Initialization Pattern

Every STM32 peripheral follows this initialization order:

  1. Enable peripheral clock in RCC register (AHBxENR or APBxENR)
  2. Configure GPIO pins with correct alternate function (AF number from datasheet)
  3. Configure peripheral registers (mode, speed, protocol settings)
  4. Configure NVIC if using interrupts (priority, enable IRQ)
  5. Configure DMA if using DMA transfers (stream/channel, direction, sizes)
  6. Enable the peripheral (set enable bit in control register)

This order is critical. Accessing peripheral registers before enabling the clock causes a bus fault.

Where to Find Configuration Information

GPIO Alternate Function Mapping (Datasheet)

Glob pattern: docs/datasheet/*.pdf

  1. Read the ToC to find "Alternate function mapping" table
  2. This table shows which AF number (AF0-AF15) connects each GPIO pin to each peripheral
  3. Example: PA9 AF7 = USART1_TX, PA10 AF7 = USART1_RX
  4. This is the MOST REFERENCED table during development

Peripheral Register Descriptions (Reference Manual)

Glob pattern: docs/reference-manual/*.pdf

  1. Read ToC (pages 1-5) to find the peripheral chapter
  2. Each peripheral chapter contains:
    • Functional description (how the peripheral works)
    • Block diagram
    • Configuration procedure (step-by-step)
    • Register descriptions with bit fields
    • Timing diagrams (for communication peripherals)

RCC Clock Enable Bits (Reference Manual)

  1. Find the "RCC" chapter
  2. Look for registers: RCC_AHB1ENR, RCC_AHB2ENR, RCC_APB1ENR, RCC_APB2ENR
  3. Each register has one bit per peripheral to enable its clock
  4. Know which bus the peripheral is on (AHB1/AHB2/APB1/APB2) to find the right register

NVIC and Interrupt Vectors

  1. Find the "Interrupts and events" chapter or "NVIC" section
  2. Contains the interrupt vector table with IRQ numbers
  3. Each peripheral's chapter also lists its interrupt sources

Read the full file on GitHub · 123 lines

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 9d ago First seen · 123 lines · 105 tokens per session scan A 0cf839d761dd

Subscribe to this mod's changes

peripheral-config is a skill published in the GitHub repository bahaabdelwahed/embedded-claude-plugin (5 stars, last pushed 5mo ago), licensed MIT. It adds 105 tokens to every session and 1,310 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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