| ??? 12/20/06 09:09 Read: times Msg Score: +1 +1 Good Answer/Helpful |
#129803 - Pushing your luck Responding to: ???'s previous message |
You can't count frequency at this rate - you can measure the period though. This is done by measuring the difference between timer counts. If your 8051 has a PCA, then this part is easy. The main problem is time - if you're using a standard 8051, the machine cycle time at 12MHz is 1uS. 10 or 20 instructions aren't going to do too much. I'd suggest you try a faster processor - much faster and with a PCA timer block. I think SiLAbs have some suitable devices but I have never used them.
Once you've sampled the data, then what do you do with it? |
| Topic | Author | Date |
| Frequency window implementation | 01/01/70 00:00 | |
| How to post ASCII Art | 01/01/70 00:00 | |
| not codes | 01/01/70 00:00 | |
| That doesn\'t matter. | 01/01/70 00:00 | |
| Feasibility | 01/01/70 00:00 | |
| 50kHz..100kHz= 20..10microsec | 01/01/70 00:00 | |
| Clear Explanation here | 01/01/70 00:00 | |
| Pushing your luck | 01/01/70 00:00 | |
| nothing can be measured (allmost) | 01/01/70 00:00 | |
| Stefan | 01/01/70 00:00 | |
nothing can be measured (allmost) | 01/01/70 00:00 |