newbie mscan extended identification quiestion

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newbie mscan extended identification quiestion

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e_taylor
Contributor III

hello:

 

i'm writiing some xdp512 assembler code to listen to the j1939 protocol. the protocol uses the 29 bit extended identifier and i want to use four sixteen bit identifiers.

 

after shifting the bits around the three flags imbedded is the 16 bit pattern from d0 to d15 or is it the upper 16 bits of the 29?

 

thanks in advance!!

 

 

ed

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isionous
Contributor III
Is your question about how assembly instructions and bit operations work or is your question about specifics of the J1939 protocol?  It's hard to understand what you are asking.
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