topic Re: Saving adc samples. in 8-bit Microcontrollers

Saving adc samples.

fredycolombia — Tue, 20 May 2008 07:56:27 GMT

Hi all,

My question is this, I am using adc in jm60 and I want to save de samples acquired into the memory of the mcu, about 100 samples and then I want to call one by one to send to usb and repeat the process.
¿How I can save de samples and then call them one by one?

thanks in advance,

Fredy.

Re: Saving adc samples.

bigmac — Tue, 20 May 2008 09:49:40 GMT

Hello Fredy,

Assuming that the ADC samples are being cyclically updated, which seems to be the case, each ADC sample might be stored within an array variable of a suitable length. Each array element can then be written and read, as required.

If you were considering non-volatile storage in flash, this is not a good idea for data that is frequently updated.

Regards,

Mac

Re: Saving adc samples.

fredycolombia — Wed, 28 May 2008 02:47:47 GMT

thanks for your answer,

I was thinking in this option because when I use adc in JM60 and display the samples, the signal is good until 20 Hz, after it frecuency don't look good, ¿the problem can be the configuration of the adc?

¿What could be the best form to configurate and use adc to see a good signal at least at 1Mz?

I put the signal to the adc pin and send the samples using usb, I have to do any more for best results?

Thanks for your answer.

regards

fredy

Re: Saving adc samples.

JimDon — Wed, 28 May 2008 02:54:15 GMT

To see "good" signal, you would need 10 samples per second? Even that would not be a good signal.

You will not make it to 1Mhz.
If you make to 10Khz, you would be doing well.

Re: Saving adc samples.

fredycolombia — Wed, 28 May 2008 19:33:42 GMT

thanks Jim,

that's a good information, I was in a mistake about the frecuency using adc, what I have to consiter to reach 10Khz using adc in JM60?

thanks,
fredy