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Sine wave generation using 8051
Moderators: Ajay, Junied , abbas1707, Arun Kumar V, pdi33, Shailesh NAYAK, ۞ TPS ۞, shyam, sashijoseph
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Thierry Henry
Mon Jun 02 2008, 05:24PM
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I know how to generate a sine wave using the 8051. I have trouble adjusting the frequency. Can anyone please help? Also, is it possible for me to generate two different sine waves (same amplitude, different frequencies) using two different ports of the 8051, simultaneoulsy?
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Arun Kumar V
Mon Jun 02 2008, 11:15PM

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hello henry,

which method are you using to generate Sine wave, are you using lookup table ?


Arun
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pdi33
Tue Jun 03 2008, 04:18AM

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hi thierry,
hmmm nice name. A great football fan it seems.looks like i too should chage mine to Platinii .
just joking buddy.
as for ur question about generating two sine waves, the answer is yes but that depends upon what logic ad hardware u are using to generate them.
* inspired to develop,developing to inspire *
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Thierry Henry
Wed Jun 04 2008, 07:42PM
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Yes I am using lookup tables, but I would also like learn about any alternatives. The main problem is adjusting the frequency. I am trying to adjust it by putting appropriate delays between each sample, but it tends to provide wayward frequencies, although in theory it should work.
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Raja1984
Wed Jun 25 2008, 05:32AM
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hi, how to generate the sine wave, actually i need to generate the three phase sine wave , could you help me for that.

thanks
raja
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BillVit
Fri Jul 04 2008, 01:07PM
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Use a phase increment accumulator....

By changing the increment value, you can change the frequency up to the max for your crystal speed and number of steps in your sine wave.

http://ka8vit.com/dds
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