On Tue, Mar 30, 2010 at 4:10 PM, Kustaa Nyholm
<kustaa.nyh...@planmeca.com>wrote:
> Classically this has been done in C by defining a union of two chars and a
> short or int, something like:
>
> typedef union {
> char asBytes[2];
> short asShort;
> } myType;
>
>
> ..
>
> myType temp;
>
> temp.asShort = yourIntValue;
>
> temp.asShort[0]; // lo byte or hi byte
>
>
> This technique is of course totally dependent on compiler and endiandness
> and compiler options, and thus is not portable.
>
> If the variable (temp above) is global, IIRC, SDCC produces decently
> effective code for above.
>
>
This approach requires two byte more RAM. Then bitwise operation or
((unsigned char *)&add)[0] method.
--
Cheers,
Grissiom
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