Microtronics myDatalogEASY V3, User Manual

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Chapter 13 Device Logic (Pawn)
13.2.11 CRC & hash
13.2.11.1 Arrays with symbolic indices
TMD5_Ctx
Context structure for the MD5 calculation
// init After being set to "0", the context structure can be used to
// calculate a new hash. If a calculation
// should be implemented by calling up the "MD5" function repeatedly,
// write access must not be granted for this element.
// tmp no write access permitted for internal use
#define TMD5_Ctx[.init, .tmp[22]]
13.2.11.2 Functions
native CRC16(data{}, len, initial=0xFFFF);
Returns the calculated modbus CRC16 of the transferred data
Parameter Explanation
data Array that contains the data for which the CRC16 should be calculated
len Number of bytes that must be taken into consideration during the calculation
initial Initial value for calculating the CRC16 - OPTIONAL
Explanation
Return value Calculated CRC16
native CRC32(data{}, len, initial=0);
Returns the calculated Ethernet CRC32 of the transferred data
Parameter Explanation
data Array that contains the data for which the CRC32 should be calculated
len Number of bytes that must be taken into consideration during the calculation
initial Initial value for calculating the CRC32 - OPTIONAL
Explanation
Return value Calculated CRC32
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