LIN protocol

[BENIO]

I am using Labview 7.1 as SW to send LIN command(Identifier+databytes) to an Atmega board which generate the protocol, does anybody know how to calculate in LV the checksum for the identifier and databyte(see the comment below)?

The checksum is the inverted modulo-256 sum

over all data bytes(Identifier+databytes). The sum is calculated by an 'add with carry' operation with the carry bit of

every addition being added to the LSB of the resulting sum.

[unclebump]

Maybe this link will help.

http://forums.ni.com/ni/board/message?board.id=170&message.id=135591&requireLogin=False

[BENIO]

Hello unclebump,

Thanks for the reply but i am not looking for any LIN interface i am just looking for a code in Labview which can calculate the checksum of the identifier an all databytes from the LIN protocole, it is in fact an inverted  modulo-256, in assembler we do it as an add with carry.  

[JB]

See attached VI.

[BENIO]

HI JB,

I have used your via in the following way (see attached pic).

Thanks again