| ??? 10/29/05 13:41 Read: times |
#103113 - Question about 2's Complementary Code |
From ADI's app note,
http://www.analog.com/UploadedF...EB_prb.pdf p17 the 16bits 2's true code is abtained from 2's complementary code through the algorithm below:
int Code;
if( Code <= 0x7fff)
//positive
;
else
{
//negative
Code &= 0x7fff;
Code -= 0x7fff;
}
Is it right ? I think 0x7fff should be 0xffff !? Is there any problems with the program below?
int Code;
if(Code <= 0x7fff)
//positive
;
else
{
//negative
Code &= 0x7fff;
Code = ~Code;
Code += 1;
Code &= 0x7fff; //to remove the higher disturbing bits
}
the last program was tested, and it works well under C++ Builder 6, but the first one does not work! |
| Topic | Author | Date |
| Question about 2's Complementary Code | 01/01/70 00:00 | |
| Why? | 01/01/70 00:00 | |
| ok! if it is not suitable,delete my post | 01/01/70 00:00 | |
| Just wondreing... | 01/01/70 00:00 | |
| sorry, I miss understanding your meaning | 01/01/70 00:00 | |
| Read the datasheet carefully! | 01/01/70 00:00 | |
| size of int are 4 bytes in CB6 | 01/01/70 00:00 | |
| 1's and 2's complement | 01/01/70 00:00 | |
yes, it is wrong! | 01/01/70 00:00 |