LTspice Language Support and Netlist Syntax Highlighting for VS Code
Adds syntax highlighting support for LTspice netlist files (.cir, .sp, etc.) in Visual Studio Code.
Features
- Basic and dedicated syntax highlighting for LTspice netlist files
- Recognition of circuit components, directives, parameters and other syntax elements
- Supported file extensions:
.cir, .sp, .ckt, .net, .sub, .lib
Installation
- Open VS Code
- Go to Extensions view (Ctrl+Shift+X or Cmd+Shift+X)
- Search for "vscode-ltspice" or your extension name
- Click Install
Or install directly from VS Code Marketplace.
Usage
After installation, VS Code will automatically recognize the following file types and apply syntax highlighting:
.cir, .ckt (circuit files).sp (SPICE netlists).net (netlist files).sub, .lib (subcircuits and libraries)
Simply open any file with these extensions to see the syntax highlighting in action.
Supported Functions
- Elements (
A, C, D, J, K, L, M, N, O, Q, R, S, T, U, W, X, Z, @, &)
- Sources (
B, E, F, G, H, I, V)
- Directives (
.tran, .fra, .param, .model, etc.)
- Function blocks (
.subckt/.ends, .machine/.endmach, etc.)
- The global reference node "GND" (
0) and numeric literals (0, 1e-3, 10k, etc.)
- Operators (
+, -, *, /, **, &, |, !, etc.)
- Builtin functions (
i, v, sin, cos, exp, idt, ddt, delay, etc.)
- Comments (line comments starting with
* or ;)
Known Limitations
- Currently provides basic syntax highlighting only (no code completion or error checking)
- Builtin functions up to LTspice 17.1
Contributing
Issues and pull requests are welcome! Please submit via GitHub repository.
Acknowledgement
Many thanks to Xuan Li. This extension starts from Li's work, SPICE, and is adjusted to LTspice.
License
MIT License
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