| ??? 12/02/09 12:13 Read: times |
#171387 - Latencies Responding to: ???'s previous message |
You get latency from your two interrupts. Your interrupt is not trigged on the exact machine cycle when the actual event happens.
That is a reason why most microprocessor timers have modes where they can capture a signal event automatically. |
| Topic | Author | Date |
| Using timer 2 for frequency measurement | 01/01/70 00:00 | |
| Latencies | 01/01/70 00:00 | |
| Big differences | 01/01/70 00:00 | |
| I'm using a PLC and a Oscilloscope !! | 01/01/70 00:00 | |
| 2% jitter... | 01/01/70 00:00 | |
| Try a free-running timer and average 10 periods | 01/01/70 00:00 | |
| Dear Per | 01/01/70 00:00 | |
| You may use timer2 if you want | 01/01/70 00:00 | |
| Latency... | 01/01/70 00:00 | |
| Frequency Measure | 01/01/70 00:00 | |
| now using timer 0 and ext intr 0 | 01/01/70 00:00 | |
| giving up without proof that ... | 01/01/70 00:00 | |
Your calculations are OK | 01/01/70 00:00 |