SVD Register Tuner

Interactive register bit-field viewer and C code generator for embedded development.

SVD Register Tuner parses your device's SVD file and gives you an interactive bit-field HUD right in the VS Code sidebar click bits, pick enum values, and copy ready-to-use C code. This saves time instead of stop referencing SVD file everytime during development.

Getting Started

1. Install the extension
2. Open a C/C++ embedded project with an SVD file in the workspace
3. The extension auto-detects your SVD File from the workspace.
4. Place your cursor on a register expression — the sidebar HUD loads it automatically.

Release v0.1.0

• Cursor Driven Register Detection to open the selected register from the code.
• Interactive Bit-Field Grid to toggle the bits of the register.
• Field Editor for the Register Bits.
• C Code Generator.
• Register Browser to browse registers from the SVD.
• Auto-Detection of the svd file from Workspace.

Cursor-Driven Register Detection

Move your cursor to any register expression in C/C++ code and the HUD automatically resolves it:

• GPIOA->MODER, RCC->AHB1ENR, TIM2->CR1
• GPIOA_MODER, RCC_AHB1ENR (underscore style)
• Direct address literals (*(volatile uint32_t*)0x40020000)

Interactive Bit-Field Grid

• Visual 32-bit (or 16/8-bit) grid color-coded by field
• Click any bit to toggle it
• Multi-bit fields supported with XOR toggle
• Read-only fields clearly marked

Field Editor

• Checkbox for single-bit fields
• Dropdown for fields with enumerated values (e.g. Input/Output/Alternate/Analog)
• Number input for multi-bit fields without enums
• Enum propagation across peripheral siblings (GPIOB gets GPIOA's enums automatically)

C Code Generator

Four code styles, one click to copy or insert at cursor:

• Read-Modify-Write — safe, preserves other bits
• Raw Write — direct full register write
• CMSIS Macros — MODIFY_REG / SET_BIT / CLEAR_BIT
• Commented — RMW with full field documentation

Register Browser

Browse all peripherals and registers from the sidebar idle state. Search/filter by name. Click any register to view its bit-fields.

Requirements

• VS Code 1.85.0 or later
• An SVD file for your target microcontroller (CMSIS-SVD format)

License

MIT