The AD7380 family has some compatible single-ended chips: AD7386/7/8(-4).
These single-ended chips have a 2:1 multiplexer in front of each ADC.
They also include additional configuration registers that allow for either
manual selection or automatic switching (sequencer mode), of the
multiplexer inputs. Add a section to describe this.
Signed-off-by: Julien Stephan <jstephan@baylibre.com>
---
Documentation/iio/ad7380.rst | 42 ++++++++++++++++++++++++++++++++++++++++++
1 file changed, 42 insertions(+)
diff --git a/Documentation/iio/ad7380.rst b/Documentation/iio/ad7380.rst
index 061cd632b5df..81dfa39519fb 100644
--- a/Documentation/iio/ad7380.rst
+++ b/Documentation/iio/ad7380.rst
@@ -17,10 +17,16 @@ The following chips are supported by this driver:
* `AD7381 <https://www.analog.com/en/products/ad7381.html>`_
* `AD7383 <https://www.analog.com/en/products/ad7383.html>`_
* `AD7384 <https://www.analog.com/en/products/ad7384.html>`_
+* `AD7386 <https://www.analog.com/en/products/ad7386.html>`_
+* `AD7387 <https://www.analog.com/en/products/ad7387.html>`_
+* `AD7388 <https://www.analog.com/en/products/ad7388.html>`_
* `AD7380-4 <https://www.analog.com/en/products/ad7380-4.html>`_
* `AD7381-4 <https://www.analog.com/en/products/ad7381-4.html>`_
* `AD7383-4 <https://www.analog.com/en/products/ad7383-4.html>`_
* `AD7384-4 <https://www.analog.com/en/products/ad7384-4.html>`_
+* `AD7386-4 <https://www.analog.com/en/products/ad7386-4.html>`_
+* `AD7387-4 <https://www.analog.com/en/products/ad7387-4.html>`_
+* `AD7388-4 <https://www.analog.com/en/products/ad7388-4.html>`_
Supported features
@@ -69,6 +75,42 @@ must restart iiod using the following command:
root:~# systemctl restart iiod
+Channel selection and sequencer (single-end chips only)
+-------------------------------------------------------
+
+Single-ended chips of this family (ad7386/7/8(-4)) have a 2:1 multiplexer in
+front of each ADC. They also include additional configuration registers that
+allow for either manual selection or automatic switching (sequencer mode),of the
+multiplexer inputs.
+
+From an IIO point of view, all inputs are exported, i.e ad7386/7/8
+export 4 channels and ad7386-4/7-4/8-4 export 8 channels.
+
+Inputs ``AinX0`` of multiplexers correspond to the first half of IIO channels (i.e
+0-1 or 0-3) and inputs ``AinX1`` correspond to second half (i.e 2-3 or 4-7).
+Example for AD7386/7/8 (2 channels parts):
+
+.. code-block::
+
+ IIO | AD7386/7/8
+ | +----------------------------
+ | | _____ ______
+ | | | | | |
+ voltage0 | AinA0 --|--->| | | |
+ | | | mux |----->| ADCA |---
+ voltage2 | AinA1 --|--->| | | |
+ | | |_____| |_____ |
+ | | _____ ______
+ | | | | | |
+ voltage1 | AinB0 --|--->| | | |
+ | | | mux |----->| ADCB |---
+ voltage3 | AinB1 --|--->| | | |
+ | | |_____| |______|
+ | |
+ | +----------------------------
+
+
+When enabling sequencer mode, the effective sampling rate is divided by two.
Unimplemented features
----------------------
--
2.45.1On Fri, 26 Jul 2024 17:20:10 +0200 Julien Stephan <jstephan@baylibre.com> wrote: > The AD7380 family has some compatible single-ended chips: AD7386/7/8(-4). > These single-ended chips have a 2:1 multiplexer in front of each ADC. > They also include additional configuration registers that allow for either > manual selection or automatic switching (sequencer mode), of the > multiplexer inputs. Add a section to describe this. > > Signed-off-by: Julien Stephan <jstephan@baylibre.com> Just one trivial missing space. Nice patch set. Thanks, Jonathan > --- > Documentation/iio/ad7380.rst | 42 ++++++++++++++++++++++++++++++++++++++++++ > 1 file changed, 42 insertions(+) > > diff --git a/Documentation/iio/ad7380.rst b/Documentation/iio/ad7380.rst > index 061cd632b5df..81dfa39519fb 100644 > --- a/Documentation/iio/ad7380.rst > +++ b/Documentation/iio/ad7380.rst > @@ -17,10 +17,16 @@ The following chips are supported by this driver: > * `AD7381 <https://www.analog.com/en/products/ad7381.html>`_ > * `AD7383 <https://www.analog.com/en/products/ad7383.html>`_ > * `AD7384 <https://www.analog.com/en/products/ad7384.html>`_ > +* `AD7386 <https://www.analog.com/en/products/ad7386.html>`_ > +* `AD7387 <https://www.analog.com/en/products/ad7387.html>`_ > +* `AD7388 <https://www.analog.com/en/products/ad7388.html>`_ > * `AD7380-4 <https://www.analog.com/en/products/ad7380-4.html>`_ > * `AD7381-4 <https://www.analog.com/en/products/ad7381-4.html>`_ > * `AD7383-4 <https://www.analog.com/en/products/ad7383-4.html>`_ > * `AD7384-4 <https://www.analog.com/en/products/ad7384-4.html>`_ > +* `AD7386-4 <https://www.analog.com/en/products/ad7386-4.html>`_ > +* `AD7387-4 <https://www.analog.com/en/products/ad7387-4.html>`_ > +* `AD7388-4 <https://www.analog.com/en/products/ad7388-4.html>`_ > > > Supported features > @@ -69,6 +75,42 @@ must restart iiod using the following command: > > root:~# systemctl restart iiod > > +Channel selection and sequencer (single-end chips only) > +------------------------------------------------------- > + > +Single-ended chips of this family (ad7386/7/8(-4)) have a 2:1 multiplexer in > +front of each ADC. They also include additional configuration registers that allow for either manual selection or automatic switching (sequencer mode),of the space after , plus adjust the wrap as that'll make it 81 chars I think. > +multiplexer inputs. > + > +From an IIO point of view, all inputs are exported, i.e ad7386/7/8 > +export 4 channels and ad7386-4/7-4/8-4 export 8 channels. > + > +Inputs ``AinX0`` of multiplexers correspond to the first half of IIO channels (i.e > +0-1 or 0-3) and inputs ``AinX1`` correspond to second half (i.e 2-3 or 4-7). > +Example for AD7386/7/8 (2 channels parts): > + > +.. code-block:: > + > + IIO | AD7386/7/8 > + | +---------------------------- > + | | _____ ______ > + | | | | | | > + voltage0 | AinA0 --|--->| | | | > + | | | mux |----->| ADCA |--- > + voltage2 | AinA1 --|--->| | | | > + | | |_____| |_____ | > + | | _____ ______ > + | | | | | | > + voltage1 | AinB0 --|--->| | | | > + | | | mux |----->| ADCB |--- > + voltage3 | AinB1 --|--->| | | | > + | | |_____| |______| > + | | > + | +---------------------------- > + > + > +When enabling sequencer mode, the effective sampling rate is divided by two. > > Unimplemented features > ---------------------- >
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