Hardware Abstraction Layer (HAL)

Defines the interface layer between your firmware application and hardware peripherals — GPIO, SPI, I2C, UART, ADC drivers with clean API definitions.

Why It Matters

A well-designed HAL makes your firmware portable across hardware revisions and MCU families. It's essential for testing with mocks and for AI tools to generate driver code correctly.

What's Included

HAL design philosophy
Peripheral interfaces
Driver API definitions
Error handling patterns
Platform-specific implementations
Testing strategy

How It's Generated

1

AI Research

Gemini with Google Search Grounding researches current SDK documentation, API references, and best practices for your specific hardware platform.

2

Document Generation

GPT-5.1 generates a comprehensive HAL Doc using the research context, tailored to your project requirements and hardware.

3

Review & Edit

Review the generated document, make edits directly, or use AI refinement to adjust specific sections with custom instructions.

4

Export & Use

Download as part of your project bundle. The document integrates with all other generated docs and code scaffolds.

Other Document Types

PRD

Comprehensive document defining what your firmware product needs to do — functional requirements, non-functional requirements, power budgets, user stories, and acceptance criteria.

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Architecture Doc

High-level system design showing how firmware modules interact — task architecture, communication patterns, memory layout, and dependency maps with Mermaid diagrams.

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State Machine

Formal definition of your firmware's state machine — states, transitions, guards, actions, and error recovery paths visualized with state diagrams.

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Context Bundle

Machine-readable JSON file containing all project context — hardware specs, pin mappings, library versions, and configuration — optimized for AI coding tools to consume.

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Bootloader/OTA

Complete specification for the device bootloader, firmware update mechanism (DFU), and over-the-air update flow — memory partitioning, image signing, and rollback strategy.

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Impl Plan

Phase-by-phase development roadmap breaking the firmware project into sprint-sized work packages with dependencies, milestones, and effort estimates.

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Frequently Asked Questions

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