Re: GSoC Proposal 2022

["Maíra Canal" <maira.canal@usp.br>]

On 04/12, Jonathan Cameron wrote:
> On Tue, 12 Apr 2022 16:23:55 +0200
> Nuno Sá <noname.nuno@gmail.com> wrote:
> 
> > On Tue, 2022-04-12 at 09:24 -0300, Maíra Canal wrote:
> > > On 04/12, Nuno Sá wrote:  
> > > > On Tue, 2022-04-12 at 11:48 +0300, Andy Shevchenko wrote:  
> > > > > On Tue, Apr 12, 2022 at 10:43 AM Maíra Canal <maira.canal@usp.br>
> > > > > wrote:  
> > > > > > On 04/11, Jonathan Cameron wrote:  
> > > > 
> > > > The MAX31875 looks to be a fairly simple one (maybe a good
> > > > candidate
> > > > for a first driver) but, IMO, having it in IIO boils down to have
> > > > support for continuos mode which would mean triggered buffer
> > > > support.  
> > > 
> > > I took another look at the Maxim Integrated catalog and end up
> > > finding
> > > the MAX31889 Temperature Sensor.
> > > 
> > > I guess this sensor has an interesting challenge level with the need
> > > to
> > > implement FIFO and interrupts support. 
> > > 
> > > Have you guys some thoughts on this one?
> Hmm. The fifo is interesting, but I'm somewhat doubtful that it's actually
> much use when connected to a linux system.  The sampling rate is 1Hz.
> At that rate even in busy systems or low power situations, there is
> little reason not to just poll the device.
> 
> You 'could' wire up a PWM or similar to the gpio and have it operate
> like a 'self clocked' device but with sampling rates so low it's a fairly
> contrived situation.
> 
> Temperature sensors in general are often a bad fit for IIO precisely because
> they are mostly designed for monitoring type purposes which HWMON covers.
> The exceptions are high speed or high accuracy devices or weird ones like
> infrared thermometers.

Okay, so temperature sensors are not a good choice for an IIO project.

Just another two suggestions: AD5124/AD5144/AD5144A potenciometer and AD7294-2
ADC. Any of those are a good idea for IIO?

P.S.: It's been hard to choose a component without any project requiments (like
in a real hardware project). I'm sorry for the buzz on the mailing list.

> 
> Jonathan
>