This function of the ⇘ CAA_Memory.library calculates the MD5 check sum of the memory area "MemoryBlock" consisting of "udiNumberOfBytes" bytes.
MD5, the algorithm used, is described in RFC1321.
|
xExecute |
BOOL |
A raising edge will start the calculation see: ⇘ “CAA 指南” |
|
pMemoryBlock |
DWORD |
Address of memory area |
|
udiNumberOfBytes |
UINT |
Size of area in bytes |
|
xDone |
BOOL |
Calculation done see: ⇘ “CAA 指南” |
|
xBusy |
BOOL |
Calculation being executed see: ⇘ “CAA 指南” |
|
abyDigest |
ARRAY[0..15] OF BYTE |
MD5 check sum |
Example:
sTest : string := 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789'
->
abyDigest[0] = 16#D1
abyDigest[1] = 16#74
abyDigest[2] = 16#AB
abyDigest[3] = 16#98
abyDigest[4] = 16#D2
abyDigest[5] = 16#77
abyDigest[6] = 16#D9
abyDigest[7] = 16#F5
abyDigest[8] = 16#A5
abyDigest[9] = 16#61
abyDigest[10] = 16#1C
abyDigest[11] = 16#2C
abyDigest[12] = 16#9F
abyDigest[13] = 16#41
abyDigest[14] = 16#9D
abyDigest[15] = 16#9F