Specification of CRC Routines
V4.0.0
R4.0 Rev 1
Table of Contents
1 Introduction and functional overview ................................................................... 5
2 Acronyms and abbreviations ............................................................................... 6
3 Related documentation........................................................................................ 7
3.1 Input documents........................................................................................... 7
3.2 Related standards and norms ...................................................................... 7
4 Constraints and assumptions .............................................................................. 8
4.1 Limitations.................................................................................................... 8
4.2 Applicability to car domains.......................................................................... 8
5 Dependencies to other modules.......................................................................... 9
5.1 File structure ................................................................................................ 9
6 Requirements traceability.................................................................................. 10
7 Functional specification ..................................................................................... 15
7.1 Basic Concepts of CRC Codes .................................................................. 15
7.1.1 Mathematical Description ....................................................................... 15
7.1.2 Euclidian Algorithm for Binary Polynomials and Bit-Sequences ............. 17
7.1.3 CRC calculation, Variations and Parameter ........................................... 18
7.2 Standard parameters.................................................................................. 18
7.2.1 8-bit CRC calculation.............................................................................. 19
7.2.1.1 8-bit SAE J1850 CRC Calculation................................................ 19
7.2.1.2 8-bit 0x2F polynomial CRC Calculation ....................................... 19
7.2.2 16-bit CRC calculation............................................................................ 20
7.2.3 32-bit CRC calculation............................................................................ 20
7.3 General behavior........................................................................................ 21
7.4 Error classification...................................................................................... 21
7.5 Error detection............................................................................................ 21
7.6 Error notification ......................................................................................... 21
7.7 Version check............................................................................................. 21
7.8 Debugging concept .................................................................................... 21
8 API specification................................................................................................ 22
8.1 Imported types............................................................................................ 22
8.2 Type definitions .......................................................................................... 22
8.3 Function definitions .................................................................................... 22
8.3.1 8-bit CRC Calculation ............................................................................. 22
8.3.1.1 8-bit SAE J1850 CRC Calculation................................................ 22
8.3.1.2 8-bit 0x2F polynomial CRC Calculation ....................................... 23
8.3.2 16-bit CRC Calculation ........................................................................... 24
8.3.3 32-bit CRC Calculation ........................................................................... 25
8.3.4 Crc_GetVersionInfo ................................................................................ 25
8.4 Call-back notifications ................................................................................ 26
8.5 Scheduled functions................................................................................... 26
8.6 Expected Interfaces.................................................................................... 26
8.6.1 Mandatory Interfaces.............................................................................. 26
3 of 34 Document ID 016: AUTOSAR_SWS_CRCLibrary
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