can-dbc

A CAN-dbc format parser written with Rust's nom parser combinator library.

1. Example

Read dbc file and generate Rust structs based on the messages/signals defined in the dbc.

use can_dbc::DBC;
use codegen::Scope;

use std::fs::File;
use std::io;
use std::io::prelude::*;

fn main() -> io::Result<()> {
    let mut f = File::open("./examples/sample.dbc")?;
    let mut buffer = Vec::new();
    f.read_to_end(&mut buffer)?;

    let dbc = can_dbc::DBC::from_slice(&buffer).expect("Failed to parse dbc file");

    let mut scope = Scope::new();
    for message in dbc.messages() {
        for signal in message.signals() {

            let mut scope = Scope::new();
            let message_struct = scope.new_struct(message.message_name());
            for signal in message.signals() {
                message_struct.field(signal.name().to_lowercase().as_str(), "f64");
            }
        }
    }

    println!("{}", scope.to_string());
    Ok(())
}

For a proper implementation for reading or writing CAN frames according to the DBC, I recommend you take a look at dbc-codegen.

2. Example

The file parser simply parses a dbc input file and prints the parsed content.

cargo test && ./target/debug/examples/file_parser -i examples/sample.dbc

Installation

can-dbc is available on crates.io and can be included in your Cargo enabled project like this:

[dependencies]
can-dbc = "3.0"

Implemented DBC parts

• version
• new_symbols
• bit_timing (deprecated but mandatory)
• nodes
• value_tables
• messages
• message_transmitters
• environment_variables
• environment_variables_data
• signal_types
• comments
• attribute_definitions
• sigtype_attr_list (format missing documentation)
• attribute_defaults
• attribute_values
• value_descriptions
• category_definitions (deprecated)
• categories (deprecated)
• filter (deprecated)
• signal_type_refs
• signal_groups
• signal_extended_value_type_list

Deviating from standard

• multispace between parsers instead of single space allowing e.g. (two spaces) SIG_GROUP 13.
• VAL_ suffix may be ; or ;

Alternatives

• canparse

Credits

Test dbcs files were copied from the cantools project.

License Checks

This project uses cargo-deny for checking the licenses of dependencies. To run the check locally run the following:

cargo install cargo-deny
cargo deny check