Ways to divide the high/low byte from a 16bit address?
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Published on 2010-03-29T14:24:19Z
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2010/03/29
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Hello,
I'm developing a software on 8051 processor. A frequent job is to divide the high and low byte of a 16bit address. I want to see there are how many ways to achieve it. The ways I come up so far are: (say ptr is a 16bit pointer, and int is 16bit int)
ADDH = (unsigned int) ptr >> 8;
ADDL = (unsigned int) ptr & 0x00FF;
and
ADDH = ((unsigned char *)&ptr)[0];
ADDL = ((unsigned char *)&ptr)[1];
Does anyone have any other bright ideas? ;)
And anyone can tell me which way is more efficient?
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