| ??? 01/07/08 12:55 Read: times Msg Score: +3 +3 Good Answer/Helpful |
#149105 - No, it won't. Responding to: ???'s previous message |
void delay_t(unsigned int Delay)
{
TH1=0;
TL1=0;
while((int(TH1<<8)+int(TL1))<Delay);
}
This might appear to work at first, but for certain values of Delay you will start running into nasty atomicity issues, since you are reading TH1 and TL1 for two different points in time. |
| Topic | Author | Date |
| Number of CPU cycle for 8051 function call | 01/01/70 00:00 | |
| Do it in assembler | 01/01/70 00:00 | |
| Delay functions | 01/01/70 00:00 | |
| A related trick | 01/01/70 00:00 | |
| Offset | 01/01/70 00:00 | |
| Offset | 01/01/70 00:00 | |
| Sure | 01/01/70 00:00 | |
| Over Drive? | 01/01/70 00:00 | |
| a refinement | 01/01/70 00:00 | |
| NOPs are so bad waste of space... | 01/01/70 00:00 | |
| waste of space... waste of time | 01/01/70 00:00 | |
| fixed delay | 01/01/70 00:00 | |
| Variable delay | 01/01/70 00:00 | |
| determinism of the cache | 01/01/70 00:00 | |
| there are no cache misses in 'linear code' | 01/01/70 00:00 | |
| I got only ONE cache miss... | 01/01/70 00:00 | |
| Old Keil Thread | 01/01/70 00:00 | |
| What about a Delay like this. | 01/01/70 00:00 | |
| No, it won't. | 01/01/70 00:00 | |
| Ok. | 01/01/70 00:00 | |
| also | 01/01/70 00:00 | |
| Also ... | 01/01/70 00:00 | |
| Actually... | 01/01/70 00:00 | |
| will. | 01/01/70 00:00 | |
| ANSI C | 01/01/70 00:00 | |
Keil option: Disable ANSI casts | 01/01/70 00:00 | |
| typo. | 01/01/70 00:00 |