analogreadresolution
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Theremingenieur
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analogReadResolution(bits) sets the bit width of the values which you get with analogRead(pin).
Thus, if bits = 10 (default), the values you can obtain with analogRead() will go from 0 to 1023.
If you change the resolution to 12, you will obtain 0 - 4095, with 6 you will obtain 0 - 63 and so on.
I general, setting the resolution to n bits, n in [1..16], you will read values from 0 to (2^n) - 1.
Thus, if bits = 10 (default), the values you can obtain with analogRead() will go from 0 to 1023.
If you change the resolution to 12, you will obtain 0 - 4095, with 6 you will obtain 0 - 63 and so on.
I general, setting the resolution to n bits, n in [1..16], you will read values from 0 to (2^n) - 1.
There is a "tip and tricks" post here: https://forum.pjrc.com/threads/25395-Teensy-Quick-Reference-Code-Examples-Tips-and-Tricks
One of them links to a 16-bit ADC example here: https://forum.pjrc.com/threads/25111-Decreasing-noise-on-Teensy-ADC?p=42891&viewfull=1#post42891
One of them links to a 16-bit ADC example here: https://forum.pjrc.com/threads/25111-Decreasing-noise-on-Teensy-ADC?p=42891&viewfull=1#post42891
Thanks, That is what I thought, Guess the Arduino Duo does not do this, that is why I use the Teensy 3.1 in our projects
Theremingenieur
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The Arduino Due should theoretically do that the same way, but I never tried it out. There is one important thing: analogReadResolution() triggers a ADC initialization and self-calibration routine every time when the resolution is modified. Be sure to let some time go before you do the first analogRead() after that, so that the initialization and calibration cycle can accomplish.
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