bitwise problems...cm11a protocol.

This is a discussion on bitwise problems...cm11a protocol. within the C Programming forums, part of the General Programming Boards category; hi. im not too good with bitwise operators and im having some trouble with cm11a programming. #define HOUSE_A 0x06 ... ...

  1. #1
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    bitwise problems...cm11a protocol.

    hi. im not too good with bitwise operators and im having some trouble with cm11a programming.


    #define HOUSE_A 0x06
    ...
    #define DEVICE_B 0x0E

    house and device go up to P but im using this as an example.

    how would i turn 0x06 and 0x0E into 0x6E?

    i was thinking left shift the 6 and add in the E but that didnt work. any help? links?

    many thanks.

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    found it myself, no bitwise

    multiply 0x6 by 16 and add e to that. problem solved.

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    and the hat of int overfl Salem's Avatar
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    Code:
    (HOUSE << 4) | DEVICE
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
    If at first you don't succeed, try writing your phone number on the exam paper.
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    thanks, is yours better in some way?

  5. #5
    and the hat of int overfl Salem's Avatar
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    You asked
    > i was thinking left shift the 6 and add in the E but that didnt work

    I answered

    And next time you have a "it didn't work", be less vague and post what didn't work

    > is yours better in some way?
    As far as the executable code is concerned, I doubt it makes a difference
    As far as the overall readability of the code - perhaps bitwise ops make more sense than arithmetic ops
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
    If at first you don't succeed, try writing your phone number on the exam paper.
    I support http://www.ukip.org/ as the first necessary step to a free Europe.

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