GitHub - raphui/epc: A tiny compiler for application-level configuration in embedded firmware.

epc - Embedded Parameters Compiler

epc (Embedded Parameters Compiler) is a lightweight DSL and expression engine designed to describe software parameters for embedded applications.
Its goal is to let firmware developers define configuration values, thresholds, constants, and other application-level parameters in a structured, human-readable format, and compile them into binary data that the firmware can directly use.

Features

• JSON/DTC-inspired syntax with {} for nodes and = for properties
• Supports arithmetic (+ - * / %) and bitwise operations (& | ^ ~ << >>)
• Typed values: u8, u16, u32 for accurate representation in firmware
• Easy to extend with new operators or additional node types
• Built-in C preprocessor support:
  • #define for constants
  • #include for parameter headers
• Generates binary output ready for firmware consumption

Getting started

Prerequisites

• gcc
• cpp

Usage

$ ./epc input_file.params output.bin

Build

$ make

Example

• config.h:

#define MAX_CLIENT	10
#define TIMEOUT_MS	60 * 1000

#define MAX_VOLUME	100
#define DEFAULT_VOLUME	MAX_VOLUME - 90

• example.params:

#include "config.h"

{
    network {
        max_clients = <MAX_CLIENTS, u8>;
        timeout_ms = <TIMEOUT_MS, u16>;
    };

    audio {
        default_volume = <DEFAULT_VOLUME, u8>;
        gain_factors = <0x5, u16>, <0x6, u16>, <0xA, u16>;
    };
}

• Generated binary:

$ ./epc example/example.params example.bin
$ xxd example.bin
00000000: 0a60ea0a 05000600  .`......
00000008: 0a00