VC10Cr32Init
V = Variable
C = Calculation
The VC10Cr32Init function is part of a collection of functions to calculate the CRC of a sequence of data. The VC10Cr32Init function need to initialize data and data structures are involved in the calculation. Other functions that are part of the collection are:
VC10Cr32Beg Beginning of the procedure
VC10Cr32Udt Update of the procedure
VC10Cr32Calc Calculation procedure
IMPLEMENTATIONS
VC10Cr32Init ( crc32arTab, crc32Value )
Initializes the array of at least 256 elements that contains the parameters for the calculation of the CRC and the CRC value.
IN/OUT | VARIABLE TYPE | EXAMPLE NAME | DIM | |
---|---|---|---|---|
OUT | ARRGBL | crc32arTab | L | Array of at least 256 elements containing the table of parameters to calculate the CRC. |
OUT | GLOBAL | crc32Value | L | Variable to be initialized to contain the value of the CRC. |
VC10Cr32Beg ( crc32arTab, crc32Value )
Assign the initial value of the CRC
IN/OUT | VARIABLE TYPE | EXAMPLE NAME | DIM | |
---|---|---|---|---|
IN | ARRGBL | crc32arTab | L | Array of at least 256 elements containing the table of parameters to calculate the CRC. |
OUT | GLOBAL | crc32Value | L | Variable used to hold the value of the CRC. |
VC10Cr32Udt ( crc32arTab, crc32Value, crc32DataIn )
Updates the value of the CRC for any new acquired datas.
IN/OUT | VARIABLE TYPE | EXAMPLE NAME | DIM | |
---|---|---|---|---|
IN | ARRGBL | crc32arTab | L | Array of at least 256 elements containing the table of parameters to calculate the CRC. |
OUT | GLOBAL | crc32Value | L | Variable used to hold the value of the CRC. |
IN | GLOBAL | crc32DataIn | L | New value to update the calculation |
VC10Cr32Calc ( crc32arTab, crc32Value, crc32DataIn )
CRC calculation concludes once gone are the data.
IN/OUT | VARIABLE TYPE | EXAMPLE NAME | DIM | |
---|---|---|---|---|
IN | ARRGBL | crc32arTab | L | Array of at least 256 elements containing the table of parameters to calculate the CRC. |
OUT | GLOBAL | crc32Value | L | Variable to be initialized to contain the value of the CRC. |
Example
VC10Cr32Init( ImedCrcTab, LImedCrcC ) MAIN: IF Start_Calc EQ 1 VC10Cr32Beg( ImedCrcTab, LImedCrcC ) FOR (Index = 1, Index LE DIM_ARRAY, 1) ;Adds a new data to calculate the CRC taking it from an array TmpLong = ArrayLong[Index] VC10Cr32Upt( ImedCrcTab, LImedCrcC, TmpLong) NEXT VC10Cr32Calc ( ImedCrcTab, LImedCrcC ) ;Conclusion of the calculation of the CRC Start_Calc = 0 ENDIF WAIT 1 JUMP MAIN END