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bit addressable arrays in ARM9

sgupta sgupta
Note: This was originally posted on 5th January 2009 at http://forums.arm.com

plz help me by telling hw we can use bit addressable arrays menas arrays that can be used bitwise..while programming through keil microvision , is there any option available??? plz help..
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  • +1 Arm Employee Badge
    Note: This was originally posted on 5th January 2009 at http://forums.arm.com

    I don't know of any language that natively supports bit-addressable arrays, as they are only really useful in very specific circumstances. In most languages, you will need to use bit-fiddling logic to implement bit-addressable arrays. The code to implement them is fairly simple but often not worthwhile.

    Are you using the C language? If so, consider a solution using a combination of a simple array, bit shifts and some form of fixed-point arithmetic to act as the addressing mechanism. You'll need to write special functions or macros to act as accessors as C's array notation will not suffice by itself here.
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  • +1 Arm Employee Badge
    Note: This was originally posted on 5th January 2009 at http://forums.arm.com

    I don't know of any language that natively supports bit-addressable arrays, as they are only really useful in very specific circumstances. In most languages, you will need to use bit-fiddling logic to implement bit-addressable arrays. The code to implement them is fairly simple but often not worthwhile.

    Are you using the C language? If so, consider a solution using a combination of a simple array, bit shifts and some form of fixed-point arithmetic to act as the addressing mechanism. You'll need to write special functions or macros to act as accessors as C's array notation will not suffice by itself here.
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