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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 erik malund

    But note that bit-banding is a processor extension to get an alternative way to access individual bits in integers. A kind of hw-accelerated bit fields. There are no new data types involved so it can't be used to create a function with a bit-sized return type.

    Even if there exists library functions that makes use of bit banding, it's possible to use by any program with zero suppot from compiler or libraries.

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  • 0 in reply to erik malund

    But note that bit-banding is a processor extension to get an alternative way to access individual bits in integers. A kind of hw-accelerated bit fields. There are no new data types involved so it can't be used to create a function with a bit-sized return type.

    Even if there exists library functions that makes use of bit banding, it's possible to use by any program with zero suppot from compiler or libraries.

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