Hands-On: ODX File Exploration

"""Parse ODX file and extract key information."""
import xml.etree.ElementTree as ET
from pathlib import Path

NS = {
    "odx": "http://www.asam.net/ODX"
}  # adjust namespace to match your ODX file version

def parse_odx(odx_path: str) -> dict:
    tree = ET.parse(odx_path)
    root = tree.getroot()

    result = {"ecu_variants": [], "base_variants": [], "functional_groups": []}

    # Find ECU-VARIANTs
    for ev in root.iter("ECU-VARIANT"):
        short_name = ev.findtext("SHORT-NAME", "")
        parent_refs = [p.get("ID-REF", "") for p in ev.findall(".//BASE-VARIANT-REF")]
        diag_comms  = [d.findtext("SHORT-NAME","") for d in ev.iter("DIAG-COMM")]
        result["ecu_variants"].append({
            "name": short_name,
            "parents": parent_refs,
            "service_count": len(diag_comms)
        })

    # Find BASE-VARIANTs
    for bv in root.iter("BASE-VARIANT"):
        result["base_variants"].append(bv.findtext("SHORT-NAME",""))

    return result

if __name__ == "__main__":
    import sys, json
    result = parse_odx(sys.argv[1])
    print(json.dumps(result, indent=2))

"""List all diagnostic services from an ODX file."""
import xml.etree.ElementTree as ET

def list_services(odx_path: str, variant_name: str = None) -> list:
    tree = ET.parse(odx_path)
    root = tree.getroot()
    services = []

    # Search in all DIAG-COMMS sections
    for diag_comm in root.iter("DIAG-COMM"):
        name = diag_comm.findtext("SHORT-NAME", "")
        # Find the request structure
        req = diag_comm.find(".//REQUEST")
        if req is not None:
            # First byte is usually the service ID
            params = req.findall(".//PARAM")
            service_id = None
            for p in params:
                if p.findtext("SHORT-NAME","") in ("SID","ServiceID","ID"):
                    service_id = p.findtext(".//CODED-VALUE","")
            services.append({
                "name": name,
                "service_id": service_id,
                "param_count": len(params)
            })
    return services

if __name__ == "__main__":
    import sys
    for svc in list_services(sys.argv[1]):
        print(f"  SID {svc['service_id']:>4}  {svc['name']:<40}  params={svc['param_count']}")