Pico ADC

[p.erasmus]

Hi Team

Please help
for the life of me I canot get the adc on the PICO to work and searching the wiki I find zero info on the PICO ,Is there any wiki pages on the Pico ?

It seems also I cannot set the conversion speed in the properties ,If I try to use the set properties macro in code then I need to give a number for conversion speed as per ref list where is this list ?

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UART_ADC.fcfx

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Thanks a million for helping out

[LeighM]

Hi,
The Pico version does not need (or use) any of those parameters.
However, you do need to call (once before start of the loop) the RawEnable()

[p.erasmus]

leigh
Thanks a million will try however is there something about all of this in the wiki ,I really do find zero info in my wiki

[p.erasmus]

Hi

I have done as you recommended however the ADC0 always show 800 to 970 counts even with no voltage applied to GIO26 I can try any of tha ADC's the result is the same

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[LeighM]

What did RawSample() give?
What do you mean by "no voltage applied"?
Have you got a load resistor, or a fairly low impedance supply attached?

[p.erasmus]

The sample give alway these numbers as shown in the terminal window

If I apply 1.0V at the ADC0 it still show the same number and I can vary it from 1V to 3,3V and the numbers stay the same

What do you mean by "no voltage applied"?

I am saying the numbers show as in the terminal even if 0V on the ADC0 pin

Yes I have low impedance source my input is buffered with an OPAMP circuit which I am using for at least 10 years on PIC ,ARDUINO and now latly on ESP32. all ways worked on all of them .

I do not know what can the issue be

[LeighM]

hmm, strange, it worked when I originally wrote and tested it,
just dug out my test from May and that just used GetInt() in a loop,
no "Enable" required in that case.
Could you try same?
Thanks
Leigh

[p.erasmus]

Leigh,

Thank I will try this in the evening and will report Thanks again for your help.

[p.erasmus]

Hi Leigh.

Thank you for your help that worked and now after that the RawInt() is also working .
Just one of those things

Thanks a million