problem with transfer parameter into subroutine

I am having some problem to pass parameter into subroutine.

I have defined:

BOOLEAN CRC_Message_Verify(UINT8 nbyte);

in my program, I have this line:

crc_ok = CRC_Message_Verify(SpiLoadIndex);

in which, SpiLoadIndex is defined as UINT8 xdata type,

when I single step debugging, before calling CRC_Message_Verify function, SpiLoadIndex = 5, and inside the subroutine, nbyte = 95. How come nbyte is totally different? Any ideas?

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  • when I single step debugging, before calling CRC_Message_Verify function, SpiLoadIndex = 5, and inside the subroutine, nbyte = 95. How come nbyte is totally different? Any ideas?
    1) which chip - reflects on what debug is available
    2) 'debugging'? how (WHICH simulator/emulator.JTAG) ????
    3) some 'dehuggers' can not 'see' a value if you click on it in the function header, only if you click on it where it is used inside the function
    4) I assume that "inside the subroutine" means while stepping inside the function, not looking at the variable while stepping somewhere else (scope)

    Erik

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  • when I single step debugging, before calling CRC_Message_Verify function, SpiLoadIndex = 5, and inside the subroutine, nbyte = 95. How come nbyte is totally different? Any ideas?
    1) which chip - reflects on what debug is available
    2) 'debugging'? how (WHICH simulator/emulator.JTAG) ????
    3) some 'dehuggers' can not 'see' a value if you click on it in the function header, only if you click on it where it is used inside the function
    4) I assume that "inside the subroutine" means while stepping inside the function, not looking at the variable while stepping somewhere else (scope)

    Erik

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