simulink arduino oscilloscope ,how i can get correct freuency ?

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rabei shwehdi
rabei shwehdi 2020-4-5
评论： rabei shwehdi 2020-4-6
HI
I AM TRYING TO BUILED OSCILLOSCOPE USING arduino AND simulink
i have a problem with the ferquency ,
when i give a 1Khz sine wave i got a 1.300 Khz sinwave if i give 2Khz i got about 2.600 Khz , this mean the frequency some how changes to 300hz higher for 1Khz and doubled for 2Khz frequeny
i am using arduino mega 2560 .. 1Khz 4v peak to peak sinwave carried on 2v dc.
how i can get correct freuency ?
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Ameer Hamza
Ameer Hamza 2020-4-6
How do you measure the frequency in Simulink? Using scope blocks? What is the time-step of the Simulink model? Are you connecting to Arduino in external mode?
rabei shwehdi
rabei shwehdi 2020-4-6
hi
yes i am working in external mode
sample time .01
measuring frequency using socpe block

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