Dataman 40Pro User Manual download pdf (Page 89)

PG4UW

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.

 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.

(*1) These values aren't saved into project; they are initialized to defaults with each new

device selection.

Tab Main checksum options allow you to set mode of Automatic checksum calculator.

(*2)

 group Custom address range for main checksum

 Enabled - user defined addresses are used to calculate checksum of buffer data,

otherwise, if Disabled, global Buffer start and Buffer end address is used for

calculation of checksum of buffer data

 Fields From address and To address are used to enter address range for main

checksum calculation. Addresses are used only when checkbox Enabled is

checked.

 Selection group Checksum type allows selecting wished kind of checksum to be

used for main checksum. More information about Checksum types can be found at

the bellow.

 Field Checksum contains actual value of recently calculated checksum.

 Group Exclude buffer block(s) from checksum calculation - same as for Tab

Checksum calculator

 Button Apply is used to confirm checksum settings from Main checksum options.

Please note, that once the button is pressed, previous checksum settings are lost.

 Button Close is used to close the Checksum dialog. If you made some changes in

settings, they won't take effect until you press Apply.

(*2) These values are stored into configuration file and project file. Setting from project file

has higher precedence.

Checksum types

Byte sum (x8)

Buffer data are summed byte-by-byte irrespective of current buffer view mode (x8/x16/x1)

organization. Any carry bits exceeding 32-bits are neglected. This checksum mode is

indicated by string (x8) displayed after checksum value in main program window.

Word sum Little Endian (x16)

Buffer data are summed word-by-word irrespective of current buffer view mode organization.

Any carry bits exceeding 32-bits are neglected. This checksum mode is indicated by string

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Dataman 40Pro User Manual Page 89

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