analogdevicesinc · jvelasc2 · Oct 13, 2025
@@ -0,0 +1 @@
+.. include:: ../../../../../projects/ad7746-ebz/README.rst
@@ -98,4 +98,12 @@ GYROSCOPES
    :maxdepth: 1
    :glob:
 
-   projects/gyroscope/*
+   projects/gyroscope/*
+
+CAPACITANCE-TO-DIGITAL CONVERTER
+=================================
+.. toctree::
+   :maxdepth: 1
+   :glob:
+
+   projects/cdc/*
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+AD7746-EBZ no-OS Example Project
+================================
+
+.. contents::
+    :depth: 3
+
+Supported Evaluation Boards
+---------------------------
+
+- :adi:`EVAL-AD7746EBZ`
+
+Overview
+--------
+
+The EVAL-AD7746EBZ is an evaluation board specifically designed to
+facilitate the testing and development of applications using the AD7746
+capacitance-to-digital converter. It features dedicated connectors for
+all capacitive input and excitation signals, flexible configuration
+options for interfacing via I²C, and supports both single-ended and
+differential capacitance measurements.
+
+Applications
+------------
+
+- Pressure measurement
+- Position sensing
+- Level sensing
+- Flowmeters
+- Humidity sensing
+- Impurity detection
+
+Hardware Specifications
+-----------------------
+
+Power Supply Requirements
+~~~~~~~~~~~~~~~~~~~~~~~~~
+
+The EVAL-AD7746EBZ evaluation board primarily operates on a 5V power
+supply through a USB connector (J1), utilizing an on-board 3.3V
+regulator (ADP3303) to deliver the regulated voltage needed for optimal
+performance. Additionally, the board supports alternative power supply
+options of either 3V or 5V via an external input (J2), providing
+flexibility for various configurations. A power indicator LED (D1) is
+included to signal the presence of power when connected via USB,
+streamlining setup by combining power supply with data communication
+through the same USB interface, allowing efficient integration with
+PC-based applications such as the AD7746 Evaluation Software
+ without needing an additional power source.
+
+On-board Connectors
+~~~~~~~~~~~~~~~~~~~
+
++-----------------------------------+-----------------------------------+
+| Connector Type                    | Description                       |
++-----------------------------------+-----------------------------------+
+| USB connector                     | Provides 5V power supply and      |
+|                                   | data communication interface via  |
+|                                   | J1.                               |
++-----------------------------------+-----------------------------------+
+| External Power Input              | Alternative power supply option   |
+|                                   | of 3V or 5V via connector J2.     |
++-----------------------------------+-----------------------------------+
+| SMB connectors (CIN1+, CIN1−,     | Used for direct interfacing with  |
+| EXCA, EXCB)                       | capacitive inputs and excitation  |
+|                                   | outputs, supporting capacitive    |
+|                                   | measurement.                      |
++-----------------------------------+-----------------------------------+
+
+No-OS Build Setup
+-----------------
+
+Please see: `https://wiki.analog.com/resources/no-os/build`
+
+No-OS Supported Examples
+------------------------
+
+The initialization data used in the example is taken out from the
+`Project Data Source Path <https://github.com/analogdevicesinc/no-OS/tree/main/projects/ad7746-ebz/src/app>`__
+
+IIO example
+~~~~~~~~~~~
+
+The IIO example code within the EVAL-AD7746EBZ project initializes an
+IIOD server on the AD7746 evaluation board, enabling it to connect with
+IIO clients. The setup is implemented through the IIO application, which
+initiates the AD7746 sensor for capacitive and temperature measurements.
+This configuration includes enabling capacitance channels and setting
+temperature read modes. Users can connect using an IIO client like the
+IIO Oscilloscope to manage device settings, such as offset, sampling
+frequency, and transform raw ADC data into voltage values. Communication
+is handled via a UART interface, ensuring continuous data interaction
+and flexible ADC usage.
+
+If you are not familiar with ADI IIO Application, please take a look at:
+`IIO No-OS <https://wiki.analog.com/resources/tools-software/no-os-software/iio>`__
+
+If you are not familiar with ADI IIO Oscilloscope Client, please take a
+look at: 
+`IIO Oscilloscope <https://wiki.analog.com/resources/tools-software/linux-software/iio_oscilloscope>`__
+
+To build the IIOD demo, add the following flag when invoking make. This
+will build the IIOD server and the IIO section of the driver:
+
+.. code-block:: bash
+
+   IIOD = y
+
+No-OS Supported Platforms
+-------------------------
+
+ADuCM3029 Platform
+~~~~~~~~~~~~~~~~~~
+
+Hardware Used
+^^^^^^^^^^^^^
+
+- :adi:`EVAL-AD7746EBZ`
+- :adi:`EVAL-ADICUP3029` (ADUCM3029 Evaluation Board)
+
+Connections
+^^^^^^^^^^^
+
+Pin-level Mapping
+
++-----------------------+-----------------------+-----------------------+
+| EVAL-AD7746EBZ LK2    | EVAL-ADICUP3029 Pin   | Function              |
+| Pin                   |                       |                       |
++-----------------------+-----------------------+-----------------------+
+| VDD (3.3V)            | 3.3V Output (or input | Power supply          |
+|                       | if powered            |                       |
+|                       | externally)           |                       |
++-----------------------+-----------------------+-----------------------+
+| GND                   | GND                   | Ground                |
++-----------------------+-----------------------+-----------------------+
+| SDA                   | I²C SDA (e.g., P0.14) | I²C data line         |
++-----------------------+-----------------------+-----------------------+
+| SCL                   | I²C SCL (e.g., P0.15) | I²C clock line        |
++-----------------------+-----------------------+-----------------------+
+| ADDR (optional)       | GND or VDD            | Sets I²C address      |
+|                       |                       | (0x48 or 0x49)        |
++-----------------------+-----------------------+-----------------------+
+| CAP/DIG pins          | —                     | For sensing, leave    |
+|                       |                       | connected as designed |
++-----------------------+-----------------------+-----------------------+
+
+Board-level Mapping
+
++-----------------------+-----------------------+-----------------------+
+|                       | **Connection Point**  | **Function**          |
++-----------------------+-----------------------+-----------------------+
+| EVAL-AD7746EBZ        | LK2 (SDA, SCL, RDY)   | Remove links to       |
+|                       |                       | disconnect USB        |
+|                       |                       | microcontroller from  |
+|                       |                       | I²C bus               |
++-----------------------+-----------------------+-----------------------+
+|                       | USB Connector         | Optional power source |
++-----------------------+-----------------------+-----------------------+
+
++-----------------------+-----------------------+-----------------------+
+|                       | **Connection Point**  | **Function**          |
++-----------------------+-----------------------+-----------------------+
+| EVAL-ADICUP3029       | 3.3V Rail             | Can power the         |
+|                       |                       | EVAL-AD7746EBZ        |
++-----------------------+-----------------------+-----------------------+
+|                       | Header J2             | Alternative power     |
+|                       |                       | source                |
++-----------------------+-----------------------+-----------------------+
+
+**Additional Notes**
+
+- The I2C lines (SDA, SCL) should have pull-up resistors (typically
+  4.7 kΩ or 10 kΩ) to the EVAL-AD7746EBZ supply voltage if not already
+  present on the board.
+
+- Confirm voltage compatibility between the I/O voltage levels of the
+  ADuCM3029 and the EVAL-AD7746EBZ.
+
+Build Command
+^^^^^^^^^^^^^
+
+.. code-block:: bash
+
+   cd no-OS/projects/ad7746-ebz
+
+   # to delete current build
+   make clean
+   # to build the project
+   make
+   # to set hardware target
+   make PLATFORM=aducm3029
+   # to flash the code
+   make run
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		.. include:: ../../../../../projects/ad7746-ebz/README.rst