Elnec MEMprog2 User Manual page 104

MD5 an MD5 hash expressed as a sequence of 32 hexadecimal digits (128 bits)
SHA-1 "Secure Hash Standard" expressed as a sequence of 40 hexadecimal digits
(160 bits)
• Insert checksum options box.
This box contains following options for Calculate & insert operation:
• Insert checksum
Kind of checksum that is written into the buffer when, the Calculate & insert operation
was executed.
• Insert address
Address in buffer where a result of chosen checksum is written, when the Calculate &
insert was executed. Address can not be specified inside the range <From address> to
<To address>. Address is always defined as Byte address.
• Size
Size of chosen checksum result, which will be written into the buffer. A size of inserted
checksum may be Byte (8-bit), Word (16-bit) or DWORD (32-bit). If size is smaller then
selected checksum size, only lower byte(s) of checksum value will be written into the
buffer.
Note: If Word size was selected, a low byte of checksum value will be written on address
specified in box Insert address and a high byte will be written on address incremented by
one. Similarly it is for DWORD.
• Byte order mode for Word and Word (CY) checksums box
This box contains setting of byte orientation in words summed for Word and Word (CY)
checksums.
Available settings are Little endian and Big Endian. Description of both settings is in
section Word sum Little Endian (x16) and Word sum Big Endian (x16) of Automatic
checksum calculator help.
• Calculate button
Click on the button Calculate starts calculating checksums for selected block in buffer. No
writes into the buffer are executed.
• Calculate & insert button
Click on the button Calculate & insert starts calculating checksums for selected block in
the buffer and writes the chosen checksum into the buffer on address specified by Insert
address. This function is available for Byte, Word, CRC-CCITT and CRC-XMODEM
checksums.
• Close button
Closes dialog Checksum.
Main checksum types
Checksum value displayed in main program window in table "Addresses" shows sum of
current data in main buffer. Sum is calculated with following rules:
• Address range of data block the checksum is calculated, can be set to one of two modes:
• Default addresses "Buffer Start" and "Buffer End", that are displayed in table
"Addresses" in the main program window.
• Custom defined addresses.
The settings are available in dialog Checksum, tab Main checksum options, check box
Use custom defined buffer addresses for checksum calculation. Custom checksum
address mode is indicated as [addrfrom..addrto] string displayed after checksum value in
main program window in table "Addresses".
104
ELNEC s. r. o.