en:software:qview:qview_6:qcl_library:vc10cr32init

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en:software:qview:qview_6:qcl_library:vc10cr32init [2017/03/24 15:32] – created qem103en:software:qview:qview_6:qcl_library:vc10cr32init [2019/08/29 17:01] (current) – external edit 127.0.0.1
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 +====== 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 ===
 +
 +<code QCL>
 +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
 +</code>