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
Install the extension
Open a C/C++ embedded project with an SVD file in the workspace
The extension auto-detects your SVD File from the workspace.
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)
