Looking for a Linux single board computer with IIO support.

Hi,

I'll start off by apologising if I don't have all the nomenclature correct. Some of this is new to me.

I've been a Linux programmer for a few years now and have pretty good programming knowledge of Linux. The application I've been maintaining is an embedded app that was written to run on a board we developed ourselves. At the time the board was developed, the Linux kernel didn't have any native APIs for GPIO so we wrote our own kernel drivers that did the dirty work to allow our application to manipulate GPIOs (AI, DIO). The board also has RTDs and power modules as well.

We are in the process of having the kernel upgraded to the most recent version (4.19?) and plan to get rid of the custom drivers and use the Linux IIO subsystem. This will be a steep learning curve for me since this is all new territory. To get a jump on things, I would like to find a device I could use to learn how the IIO API's work.

Do any of the single board computers that run Linux have support for Linux IIO? Can someone suggest a good one to use to start learning?

Thanks

Welcome to LQ, drathnow.

GPIO are not usually assigned to any device we're familiar with, and the specs usually only mention familiar devices. In my experience what you need is a dealer with a good knowledge of his products. My advice is to phone some places and try and find some guy who can sift through the specs mentally of what he's selling and name one. It might sometimes be called 'programmable i/o' I have no idea what this is - a search threw it up. It or something like it might be useful
http://linuxgizmos.com/i-mx6-ul-base...grammable-zpu/

The 4.19 Linux kernel has plenty of GPIO support. Suggest you review the documentation as well as search for example code.

General Purpose Input/Output (GPIO)

You can also control it from the userspace, https://elinux.org/GPIO. Yes it works, it is not recommended, however in order to get things done rapidly, I've done this in testing and then switched over to kernel space to make production code.

Thanks for the replies. I realize that 4.19 provides GPIO support but what I'm asking is if here is any specific single-board computer that someone could recommend for learning how to use the GPIO APIs, in particular Linux Industrial I/O subsystem.

Dave.

Raspberry Pi and Beaglebone Black

Awesome! Thanks again.