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Blue Bridge Cup_ Single chip microcomputer_ Measure the frequency of 555
2022-07-06 09:12:00 【Ajie sends code online】
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Catalog
measurement 555 The frequency of
measurement 555 The frequency of
To configure 555 Square wave generator , It can produce what the experiment needs 200Hz~20kHz The square wave signal of
Conclusion of the examination
- Use timer 0 Counting mode . You usually need to configure TR,CT,GATE,(CT,GATE from TMOD control )TH,TL. By timer 1, every other Read once a second TH and TL The numerical , Then clear TH and TL( perhaps 100ms The value read in *10), You can know the frequency .
- The counter only counts the falling edge , therefore ,555 The frequency of can be directly converted by the value of the counter . If both rising edge and falling edge technology , Then we have to /2.
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