| ??? 03/26/08 20:42 Read: times |
#152585 - re: OT: shifting 32 bit Responding to: ???'s previous message |
Frieder Ferlemann said: Funny, that's almost EXACTLY my code for the shift: do the shift first and OR in a new bit only if it tests true. And I also don't bother with initializing the shift register because I shift in all bits.
Maybe try this:
unsigned long f ()
{
unsigned long t; /* no need to clear */
unsigned char i = 32;
do
{
t <<= 1;
if (P0_1)
t |= 0x00000001;
} while (--i);
return t;
}My main difference is that instead of testing a port bit directly, I test the width of a pulse (time between two dropping edges of a port pin). Same concept though. -a |
| Topic | Author | Date |
| 24 bit number comparison in a 8 bit mc | 01/01/70 00:00 | |
| assembler or C | 01/01/70 00:00 | |
| How about this? (union, C-compiler, assembler) | 01/01/70 00:00 | |
| helpful! | 01/01/70 00:00 | |
| OT: shifting 32 bit | 01/01/70 00:00 | |
| re: OT: shifting 32 bit | 01/01/70 00:00 | |
Thanks | 01/01/70 00:00 |