MEM.UnpackDWord (FB prefix: memudw)

This function block of the ⇘ CAA_Memory.library block will unpack the DWORD “dwValue“ and return the two words contained "wLowWord", "wHighWord", the 4 bytes "byLLByte" .. "byHHByte" and the 32 bits "xBit0" .. "xBit31".

Input:

dwValue

DWORD

DWORD to be unpacked

Output:

wLowWord	WORD	Low word of dwValue
wHighWord	WORD	High word of dwValue
byLLByte	BYTE	LL bytes of dwValue
byLHByte	BYTE	LH bytes of dwValue
byHLByte	BYTE	HL bytes of dwValue
byHHByte	BYTE	HH bytes of dwValue
xBit0	BOOL	Bit 0 of dwValue
xBit1	BOOL	Bit 1 of dwValue
xBit2	BOOL	Bit 2 of dwValue
xBit3	BOOL	Bit 3 of dwValue
xBit4	BOOL	Bit 4 of dwValue
xBit5	BOOL	Bit 5 of dwValue
xBit6	BOOL	Bit 6 of dwValue
xBit7	BOOL	Bit 7 of dwValue
xBit8	BOOL	Bit 8 of dwValue
xBit9	BOOL	Bit 9 of dwValue
xBit10	BOOL	Bit 10 of dwValue
xBit11	BOOL	Bit 11 of dwValue
xBit12	BOOL	Bit 12 of dwValue
xBit13	BOOL	Bit 13 of dwValue
xBit14	BOOL	Bit 14 of dwValue
xBit15	BOOL	Bit 15 of dwValue
xBit16	BOOL	Bit 16 of dwValue
xBit17	BOOL	Bit 17 of dwValue
xBit18	BOOL	Bit 18 of dwValue
xBit19	BOOL	Bit 19 of dwValue
xBit20	BOOL	Bit 20 of dwValue
xBit21	BOOL	Bit 21 of dwValue
xBit22	BOOL	Bit 22 of dwValue
xBit23	BOOL	Bit 23 of dwValue
xBit24	BOOL	Bit 24 of dwValue
xBit25	BOOL	Bit 25 of dwValue
xBit26	BOOL	Bit 26 of dwValue
xBit27	BOOL	Bit 27 of dwValue
xBit28	BOOL	Bit 28 of dwValue
xBit29	BOOL	Bit 29 of dwValue
xBit30	BOOL	Bit 30 of dwValue
xBit31	BOOL	Bit 31 of dwValue

Example:

dwValue = 16#01020304 = 2#00000001 00000010 00000011 00000100

byLowWord = 16#0304

byHighWord = 16#0102

byLLByte = 16#04

byLHByte = 16#03

byHLByte = 16#02

byHHByte = 16#01

xBit2, xBit8, xBit9, xBit17 and xBit24, = TRUE

remain bits = FALSE