DP44/docs/ai/Common/DTS.Common.Serialization/DDAS (Chrysler)/FromChrysler.md

source_files, generated_at, model, schema_version, sha256

source_files	generated_at	model	schema_version	sha256
Common/DTS.Common.Serialization/DDAS (Chrysler)/FromChrysler/ChannelDefinition.h Common/DTS.Common.Serialization/DDAS (Chrysler)/FromChrysler/FilePath.h Common/DTS.Common.Serialization/DDAS (Chrysler)/FromChrysler/DDASTestDefinition.h Common/DTS.Common.Serialization/DDAS (Chrysler)/FromChrysler/DataFloat.h	2026-04-17T15:36:51.829395+00:00	zai-org/GLM-5-FP8	1	39b9f7039a4c0cc0

DDAS (Chrysler) Serialization Module Documentation

1. Purpose

This module provides data structures and utilities for the DaimlerChrysler DDAS (Dynamic Data Acquisition System) file format. It defines the binary layout for test definitions, channel configurations, transducer data, and floating-point data files used in crash test data acquisition. The module handles serialization of test configurations, channel definitions, and acquired data, serving as the bridge between proprietary DDAS hardware and software analysis tools.

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2. Public Interface

ChannelDefinition.h

Structures:

• CHANNEL / PCHANNEL / PCHAN — A 64-bit aligned structure representing a data acquisition channel.
  • short Size — Size of the object
  • short Flags — Channel flags (bitfield)
  • char Name[64] — Channel name
  • char Sign[8] — Sign indicator (+, -, or blank)
  • char Axis[8] — Axis identifier (X, Y, Z, FX, MX, AX, etc.)
  • float FilterFreq — Filter frequency in Hz
  • float SetGain — Configured gain setting
  • float ActGain — Actual/measured gain
  • float Rcal — Shunt calibration resistance
  • float Excitation — Excitation voltage
  • byte byteSpares[4] — Spare bytes (formerly CalDate)
  • TRANSDUCER Transducer — Embedded transducer snapshot

Enumerations:

• ChannelFlags — Contains CHANFLAG_ACTIVE

Macros:

• ISCHANACTIVE(pChan) — Returns 1 if channel active flag is set
• SETCHANACTIVE(pChan) — Sets channel active flag
• CLRCHANACTIVE(pChan) — Clears channel active flag

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FilePath.h

Class: CFilePath

File path manipulation utility with the following public methods:

Method	Signature	Description
CFilePath	()	Constructor
~CFilePath	() virtual	Virtual destructor
operator=	(const CFilePath &src)	Assignment operator
Clear	void ()	Clears all path components
SetDrive	int (int nDriveAis1)	Sets drive by number (A=1)
SetDriveOrResource	int (char *szNewDrive, int* nNext)	Sets drive or network resource
SetDir	int (char *szNewDir, int* nNext)	Sets directory component
SetFile	int (char *szNewFile, int *nNext)	Sets filename component
SetExtension	int (char *szNewExt)	Sets file extension
SetFullFilePathAndName	int (char* szPathAndName)	Parses and sets complete path
ParseFilePathAndName	int (char *szPathAndName)	Parses path into components
GetFullFilePathAndName	const char* ()	Returns complete path string
GetFileName	const char* ()	Returns filename without extension
GetFileNameExt	const CString ()	Returns filename with extension
GetFileExtension	const char* ()	Returns file extension
FileExists	BOOL ()	Checks if file exists on disk
IsFileType	bool (char *szFileTypeExt)	Validates file extension matches
IsPathComplete	bool (int *pFlgValid)	Checks if path is fully specified
IsFileValid	bool (const char* szFileSpec, const char *szFileTypeExt, CString* pcsError)	Validates file specification
IsAllValidChars	bool (char* szInString, int* pnPosBad)	Validates characters in string

Enumerations:

• FileSpecOK — Bitmask flags for path validation:
  • FSPEC_EXTOK = 0x1 — Extension valid
  • FSPEC_NAMEOK = 0x2 — Filename valid
  • FSPEC_PATHOK = 0x4 — Path valid
  • FSPEC_ROOTOK = 0x8 — Drive/computer valid
  • `FSPEC_REL