| ??? 04/05/10 00:32 Read: times Msg Score: +1 +1 Good Answer/Helpful |
#174837 - Limit to max period length of a timer Responding to: ???'s previous message |
If you have a 16 bit divider, it can count at max 65536 steps.
If you want 1 second delay and have 65536 steps, that means that each tick must take 15.26us. But that is a long time for a processor. There is a limit to how long delays you will manage with a single 16-bit counter. When trying to get longer delays than the a timer can manage in one full-count cycle, you will have to use an interrupt that on each overflow counts down a separate variable, and when that variable reaches zero either performs an action or sets a flag. Then restarts this separate variable again. |
| Topic | Author | Date |
| P89V51RD2 Timing | 01/01/70 00:00 | |
| FAQ? | 01/01/70 00:00 | |
| yes, but | 01/01/70 00:00 | |
| Limit to max period length of a timer | 01/01/70 00:00 | |
I wouldn't just max out the timer | 01/01/70 00:00 | |
| User manual? | 01/01/70 00:00 | |
| User manual for P89V51 | 01/01/70 00:00 |