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Question using bit variables

henk van winkoop

Hi,

I'm using the ST32F103G uC and Keli uVision 4.22 IDE.

Something that I don't understand is how to use single bits as variables or as a function return value. With other compilers I know 'bit' and 'bool' but somehow this doesn't seem to work with the armcc compiler. I searched the Internet but could not find anything in that direction.

Who can help me out?

Thanks in advance,

Henk

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  • 0 in reply to ImPer Westermark

    "Most processors don't support bit variables, so there are no C language extension to declare bit variables or have function return single bits."

    I think you meant to say that the standard C language has no facilities to declare bit variables or have function return single bits?

    There certainly are C implementations which provide language extensions to declare bit variables or have function return single bits - Keil C51 being a case in point.

    However, this does rely entirely upon specific hardware support from the underlying target architecture.

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  • 0 in reply to ImPer Westermark

    "Most processors don't support bit variables, so there are no C language extension to declare bit variables or have function return single bits."

    I think you meant to say that the standard C language has no facilities to declare bit variables or have function return single bits?

    There certainly are C implementations which provide language extensions to declare bit variables or have function return single bits - Keil C51 being a case in point.

    However, this does rely entirely upon specific hardware support from the underlying target architecture.

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