The data sheet states
"Each channel is SW configurable to be:
■ 0-10V input
■ 4-20mA input
■ NTC input with 3V voltage
reference REF3330AIRSER"
How do you configure it via the software?
Is this a joke?
What are we talking about? The reference you've given us is for a voltage reference chip.
The answer to your general question "How do you configure it via software?" has two possible answers (regardless of what "it" is): 1/ find a library for "it" and use that, or 2/ read the datasheet.
Hi, @peerpsi
Welcome to the forum.
Please read the post at the start of any forum , entitled "How to use this Forum".
This will help with advice on how to present your code and problems.
Tom.... 
Ah, forum protocols are always a tricky thing to satisfy.
I thought I was clear by posting in the Hardware/Portenta area as that is exactly what the hardware is. As for the datasheet, I did read it and the quote is directly from the datasheet for the Portenta, page 1 at the bottom. My Google searches are turning up nothing for what the intended selection method is for the different analog input configurations it is intended to support, 4-20, 0-10 or NTC.
While I am admittedly a novice at Arduino, actually purchased the device for my son who has taken an interest, I have quite a bit of experience with the more popular industrial platforms. Typically their manuals spell out how to do this selection in the software. I will continue my search as clearly my request for help has been received as offensive.
No, you are quite right. My reaction was inappropriate and unhelpful, and I apologise. Sorry for being a bit of arse.
Hi, @peerpsi
Can you post a link to where you got the "Each channel is SW configurable to be" information from.
I Google > REF3330AIRSER
I eventually get to a data sheet for the IC, a voltage reference IC.
Can you please post an image of the device?
Thanks.. Tom..
Portenta datasheet
Datasheet has a picture of the unit and the bottom left corner of page one shows the specifications for the analog stating what I believe is that the analog inputs are software configurable to the 3 different input types. What I also found was a reference to some board level relay that was used to select different resistor values through SPST contacts. In essence the software would turn 1 of the three switches to set the resistor.
ts12a44514pwr
Page 10 of the datasheet refers to this device which would make sense. I suspect through commands you select one relay contact to place in circuit the resistor/s required to configure the analog input channel for the format you want. Question is what command or instruction is required and what is the appropriate syntax.
Hi,
I have scoured the link you sent, yes its very scarce on how to configure the appropriate input function of the analog input.
I have left an enquiry on my local supplier's forum, I hope to get some reply in the next 24hr, unless they have Christmas Holidays.
Tom...
Thanks, I appreciate the help. I don't expect I'd get much from Digikey.
Hi,
I got this reply;
The selection is controlled by a software-controlled analog switch TS12A44514PWR.
According to the examples:analog_in.set0_10V(); // Select 0-10v
analog_in.set4_20mA(); // Select 4-20mA
analog_in.setNTC(); //Select NTC
So somewhere in the documentation there are examples of codes.
I will ask for the link.
I hope this helps, I am also interested in this controller.
Tom...
Hi, @peerpsi
The guys at Core Electronics are on the ball this morning.
Got this reply;
The examples should be installed automatically as part of the library install. The analog input >examples are here:
Arduino_MachineControl/examples/Analog_input at master · arduino-libraries/Arduino_MachineControl · GitHubThere does not appear to be a separate document for the API (as is common ith Arduino libraries) so the documentation is what you can glean from the library header files.
Arduino_MachineControl/Arduino_MachineControl.h at master · arduino-libraries/Arduino_MachineControl · GitHub
So it seems most of the info is on GitHub, rather than a dedicated Webpage, which in my opinion is a bummer.
Hope this info makes sense mate.
Here is where the forum for Core Electronics, Australia is located, a very customer oriented company.
I have had times when needing urgent parts and they have been very accomodating, and now in this case there forum response, especially around Christmas is great.
Tom...
TomGeorge thanks for the very helpful information. It is exactly what I was looking for. Cudo's to Core Electronics for their support.