Re: [PATCH v4 6/8] iio: imu: adis16607: Add FIFO-based buffered/triggered capture

[Nuno Sá]

On Mon, Nov 02, 2026 at 08:08:50AM +0000, Sabau, Radu bogdan wrote:
> > -----Original Message-----
> > From: Sa, Nuno <nuno.sa@xxxxxxxxxx>
> > Sent: Friday, October 30, 2026 4:07 PM
> 
> ...
> 
> > > +
> > > +/*
> > > + * Process a single FIFO sample and push to IIO buffer.
> > > + * FIFO data format differs from regular burst - no DIAG_STAT, data starts
> > immediately.
> > 
> > So FIFO is another command different from burst_mode? If so, is there
> > any constrain with using SPI full duplex and FIFO?
> > 
> 
> Burst Read Function can be used on two registers, DIAG_STAT and FIFO_DATA.
> On DIAG_STAT it returns a single set of the most recent samples directly
> from the sensor, bypassing the FIFO. 
> On FIFO_DATA each burst read pops one set of samples from the FIFO.
> Either way the whole set comes out in a single SPI transfer with CS held
> low. I used half-duplex because that is what gives access to the burst
> read: in full duplex, register reads are separate transfers with CS toggling
> between them, so a set can't be popped in one transfer.

I see! Thanks to clear that out (too lazy to go look at the datashee :))!

- Nuno Sá

>