CRC Library (Crc)

This service makes a CRC16 calculation on Crc_Length data bytes.

This service makes a CRC32 calculation on Crc_Length data bytes.

This service returns the version information of this module.

This service makes a CRC8 calculation on Crc_Length data bytes, with SAE J1850 parameters

This service makes a CRC8 calculation with the Polynomial 0x2F on Crc_Length

This service makes a CRC32 calculation on Crc_Length data bytes, using the polynomial 0x F4ACFB13. This CRC routine is used by E2E Profile 4.

This service makes a CRC64 calculation on Crc_Length data bytes, using the polynomial 0x42F0E1EBA9EA3693. This CRC routine is used by E2E Profile 7.

This service makes a CRC16 calculation on Crc_Length data bytes, using the polynomial 0x8005.

The CRC module shall implement the CRC16 routine based on the CCITT-FALSE CRC16 Standard, according to the following table: See Table 7.5.

The CRC module shall implement the CRC32 routine based on the IEEE-802.3 CRC32 Ethernet Standard, according to the following table: See Table 7.9.

If the CRC calculation within the function Crc_CalculateCRC16 is performed by hardware, then the CRC module's implementer shall ensure reentrancy of this function by implementing a (software based) locking mechanism.

If the CRC calculation within the function Crc_CalculateCRC32 is performed by hardware, then the CRC module's implementer shall ensure reentrancy of this function by implementing a (software based) locking mechanism.

The function Crc_GetVersionInfo shall return the version in- formation of the CRC module. The version information includes: • Module Id • Vendor Id • Vendor specific version numbers (SRS_BSW_00407).

If CRC routines are to be used as a library, the CRC modules' implementer shall develop the CRC module in a way that only those parts of the CRC code that are used by other modules are linked into the final binary.

The CRC function (with parameter Crc_IsFirstCall = TRUE) shall do the following operations: 1. As 'Initial value' of the CRC computation, uses the attribute 'Initial value' of the polynomial: Crc = P olynomialInitV al 2. If the attribute 'Input data reflected' of the polynomial is TRUE, then reflects input data (byte per byte) obtained via parameters Crc_DataPtr and Crc_Length : Data = re ect 8 ( Data ) (in the case 'Input data reflected' is TRUE) 3. Compute the CRC over the data, the last CRC and the CRC polynomial: Crc = f ( Data; Crc; P olynomial ) 4. Execute the XOR operation between crc and 'XOR value' of the polynomial: Crc = Crc  P olynomialXORV al 5. If the attribute 'Result data reflected' of the polynomial is TRUE, then reflect the CRC (over 8, 16 or 32 bits, depending on the CRC size): Crc = ref lect Crcsize ( Crc ) (in the case 'Result data reflected' is TRUE) 6. The CRC is returned: return Crc Steps 2 and 3 are performed as long as data are available

The function Crc_CalculateCRC16 shall perform a CRC16 cal- culation using polynomial 0x1021 on Crc_Length data bytes, pointed to by Crc_- DataPtr , with the starting value of Crc_StartValue16 .

The function Crc_CalculateCRC32 shall perform a CRC32 cal- culation using polynomial 0x04C11DB7 on Crc_Length data bytes, pointed to by Crc_DataPtr , with the starting value of Crc_StartValue32 .

If source code for caller and callee of the function Crc_GetVer- sionInfo is available, the CRC module should realize this function as a macro, de- fined in the modules header file.

Module Header File Imported Type Std Std_Types.h Std_VersionInfoType

The Crc_CalculateCRC8 function of the CRC module shall im- plement the CRC8 routine based on the SAE-J1850 CRC8 Standard, according to the following table: See Table 7.1.

The function Crc_CalculateCRC8 shall perform a CRC8 cal- culation using polynomial 0x1D on Crc_Length data bytes, pointed to by Crc_Dat- aPtr , with the starting value of Crc_StartValue8 .

If the CRC calculation within the function Crc_CalculateCRC8 is performed by hardware, then the CRC module's implementer shall ensure reentrancy of this function by implementing a (software based) locking mechanism.

The CRC function (with parameter Crc_IsFirstCall = FALSE) shall do the following operations: 1. As 'Initial value' of the CRC computation, uses the parameter Crc_StartValueX (where X is 8, 8H2F, 16, 32, P4 or 64) that should be the CRC result of the last call. The result is then XORed with 'XOR value' and reflected if 'Result data reflected' of the polynomial is TRUE: Crc = Crc _ StartV alueX  P olynomialXORV al Crc = re ect Crcsize ( Crc ) (in the case 'Result data reflected' is TRUE) Steps 2 to 6 are identical to [SWS_Crc_00014].

The Crc_CalculateCRC8H2F function of the CRC module shall implement the CRC8 routine based on the generator polynomial 0x2F, according to the following table: See Table 7.3.

The function Crc_CalculateCRC8H2F shall perform a CRC8 calculation with the polynomial 0x2F on Crc_Length data bytes, pointed to by Crc_- DataPtr , with the starting value of Crc_StartValue8H2F .

If the CRC calculation within the function Crc_Calculate- CRC8H2F is performed by hardware, then the CRC module's implementer shall ensure reentrancy of this function by implementing a (software based) locking mechanism.

CRC_VENDOR_ID #define/ uint16 Vendor ID of the dedicated implementation of this module according to the AUTOSAR vendor list CRC_MODULE_ID #define/ uint16 Module ID of this module from Module List CRC_AR_RELEASE_MAJOR_VERSION #define/ uint8 Major version number of AUTOSAR release on which the appropriate implementation is based on. CRC_AR_RELEASE_MINOR_VERSION #define/ uint8 Minor version number of AUTOSAR release on which the appropriate implementation is based on. CRC_AR_RELEASE_REVISION_VERSION #define/ uint8 Patch level version number of AUTOSAR release on which the appropriate implementation is based on. CRC_SW_MAJOR_VERSION #define/ uint8 Major version number of the vendor specific implementation of the module. The numbering is vendor specific. CRC_SW_MINOR_VERSION #define/ uint8 Minor version number of the vendor specific implementation of the module. The numbering is vendor specific. CRC_SW_PATCH_VERSION #define/ uint8 Patch level version number of the vendor specific implementation of the module. The numbering is vendor specific.

The standardized common published parameters as required by SRS_BSW_00402 in the SRS General on Basic Software Modules [3] shall be pub- lished within the header file of this module and need to be provided in the BSW Mod- uleDescription. The according module abbreviation can be found in the List of Basic Software Modules [10].

These requirements are not applicable to this specification.

The Crc_CalculateCRC8 function of the CRC module shall pro- vide the following CRC results, according to the following table: See Table 7.2.

The Crc_CalculateCRC8H2F function of the CRC module shall provide the following CRC results, according to the following table: See Table 7.4.

The Crc_CalculateCRC16 function of the CRC module shall provide the following CRC results, according to the following table: See Table 7.6.

The Crc_CalculateCRC32 function of the CRC module shall provide the following CRC results, according to the following table: See Table 7.10.

The CRC module shall implement the CRC32 routine using the 0xF4'AC'FB'13 polynomial, according to the following table: See Table 7.11.

The Crc_CalculateCRC32P4 function of the CRC module shall provide the following CRC results, according to the following table: See Table 7.12.

The function Crc_CalculateCRC32P4 shall perform a CRC32 calculation using polynomial 0xF4ACFB13 on Crc_Length data bytes, pointed to by Crc_DataPtr , with the starting value of Crc_StartValue32 .

If the CRC calculation within the function Crc_Calculate- CRC32P4 is performed by hardware, then the CRC module's implementer shall ensure reentrancy of this function by implementing a (software based) locking mechanism.

The CRC module shall implement the CRC64 routine using the 0x42'F0'E1'EB'A9'EA'36'93 polynomial, according to the following table: See Table 7.13.

The Crc_CalculateCRC64 function of the CRC module shall provide the following CRC results, according to the following table: See Table 7.14.

The function Crc_CalculateCRC64 shall perform a CRC64 calculation using polynomial 0x42F0E1EBA9EA3693 on Crc_Length data bytes, pointed to by Crc_DataPtr , with the starting value of Crc_StartValue64 .

If the CRC calculation within the function Crc_CalculateCRC64 is performed by hardware, then the CRC module's implementer shall ensure reentrancy of this function by implementing a (software based) locking mechanism.

The CRC module shall implement the CRC16 based on the CRC- 16/ARC Standard, according to the following table: See Table 7.7.

The Crc_CalculateCRC16ARC function of the CRC module shall provide the following CRC results, according to the following table: See Table 7.8.

The function Crc_CalculateCRC16ARC shall perform a CRC16 calculation using polynomial 0x8005 on Crc_Length data bytes, pointed to by Crc_- DataPtr , with the starting value of Crc_StartValue16 .

If the CRC calculation within the function Crc_Calculate- CRC16ARC is performed by hardware, then the CRC module's implementer shall en- sure reentrancy of this function by implementing a (software based) locking mecha- nism.

The CRC library functions shall not call any BSW modules func- tions (e.g. the DET).

These requirements are not applicable to this specifica- tion.