pluto_hdl_adi/docs/projects/cn0561/index.rst

.. _cn0561:

CN0561 HDL project
===============================================================================

Overview
-------------------------------------------------------------------------------

The :adi:`AD4134` is a quad channel, low noise, simultaneous sampling, 
precision analog-to-digital converter (ADC), based on the continuous time 
sigma-delta (CTSD) modulation scheme. This architecture inherently rejects 
signals around the ADC aliasing frequency band, giving the device its inherent 
antialiasing capability, and removesthe need for a complex external 
antialiasing filter.

This device has four independent converter channels in parallel, each with a 
CTSD modulator and a digital decimation and filtering path. It enables 
simultaneous sampling of four signal sources, with a maximum input bandwidth 
of 391.5 kHz. It supports a wide range of ODR frequencies, from 0.01 kSPS to
1496 kSPS wih less than 0.01 SPS adjustment resolution, allowing the user to 
granularly vary sampling speed to achieve coherent sampling.

The :adi:`AD4134` supports two device configuration schemes: serial peripheral 
interface (SPI) and hardware pin configuration (pin control mode). 
The SPI control mode offers access to all the features and configuration 
options available on the chip. Pin control mode offers the benefit of 
simplifying the device configuration, enabling the device to operate 
autonomously after power-up operating in a standalone mode.

The HDL reference design for the EVAL-CN0561 provides all the interfaces that 
are necessary to interact with the device using a Xilinx FPGA development 
board; to acquire data from the ADC device, supporting continuous data 
capture at maximum 1.5 MSPS data rate. However, due to a hardware limitation, 
the Cora-Z7s variant will only support a maximum data clock of 24MHz,
in contrast with 48MHz supported on the Zedboard.

Supported boards
-------------------------------------------------------------------------------

-  :adi:`EVAL-CN0561 <design-center/reference-designs/circuits-from-the-lab/cn0531>`

Supported devices
-------------------------------------------------------------------------------

-  :adi:`AD4134`

Supported carriers
-------------------------------------------------------------------------------

-  :xilinx:`ZedBoard <products/boards-and-kits/1-8dyf-11.html>` on FMC slot
-  `Cora Z7-07S <https://digilent.com/shop/cora-z7-zynq-7000-single-core-for-arm-fpga-soc-development/>`_ on Arduino type headers
-  `DE10-Nano <https://www.intel.com/content/www/us/en/developer/topic-technology/edge-5g/hardware/fpga-de10-nano.html>`__ on Arduino type headers

Block design
-------------------------------------------------------------------------------

The reference design uses the SPI Engine Framework to interface with 
the AD4134 ADC and only supports the slave mode with both DCLK and ODR 
generated by the FPGA. The device sends data on the 4 DIN bits.

Block diagram
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

The data path and clock domains are depicted in the below diagrams:

.. image:: cn0561_hdl.svg
   :width: 800
   :align: center
   :alt: CN0561/ZED/Cora Z7-07S block diagram *

.. admonition:: Legend
   :class: note

   ``*`` The block design for Cora Z7-07S remains the same, the only 
   difference is the data clock frequency of 24MHz.

Jumper setup
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

.. list-table::
   :widths: 15 5 45
   :header-rows: 1

   * - Jumper/Solder link
     - Position
     - Description
   * - P10
     - Mounted
     - MODE (Slave) and DEC0/DCLKIO (DCLK Input)
   * - P13
     - 1-2
     - Current sources and fault protection powered from board ±15V sources
   * - P15
     - 1-2
     - Current sources and fault protection powered from board ±15V sources

CPU/Memory interconnects addresses
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

The addresses are dependent on the architecture of the FPGA, having an offset
added to the base address from HDL(see more at :ref:`architecture`).

========================  ===========
Instance                  Address
========================  ===========
spi_cn0561_axi_regmap     0x44A0_0000
axi_cn0561_dma            0x44A3_0000
odr_generator             0x44B0_0000
axi_cn0561_clkgen         0x44B1_0000
========================  ===========

SPI connections
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

.. list-table::
   :widths: 25 25 25 25
   :header-rows: 1

   * - SPI type
     - SPI manager instance
     - SPI subordinate
     - CS
   * - PS
     - SPI 0
     - AD4134
     - 0

GPIOs
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

The Software GPIO number is calculated as follows:

-  Zynq-7000: if PS7 is used, then offset is 54

.. list-table::
   :widths: 25 25 25 25
   :header-rows: 2

   * - GPIO signal
     - Direction
     - HDL GPIO EMIO
     - Software GPIO
   * -
     - (from FPGA view)
     -
     - Zynq-7000
   * - cn0561_gpio[7:4]
     - INOUT
     - 42:39
     - 96:93
   * - cn0561_gpio[2:0]
     - INOUT
     - 38:36
     - 92:90
   * - cn0561_pinbspi
     - INOUT
     - 35
     - 89
   * - cn0561_mode
     - INOUT
     - 34
     - 88
   * - cn0561_pdn
     - INOUT
     - 33
     - 87
   * - cn0561_resetn
     - INOUT
     - 32
     - 86
     
Interrupts
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Below are the Programmable Logic interrupts used in this project.

=============== === ========== ===========
Instance name   HDL Linux Zynq Actual Zynq
=============== === ========== ===========
axi_cn0561_dma  13  57         89
spi_cn0561      12  56         88
=============== === ========== ===========

Building the HDL project
-------------------------------------------------------------------------------

The design is built upon ADI's generic HDL reference design framework.
ADI does not distribute the bit/elf files of these projects so they
must be built from the sources available :git-hdl:`here </>`. To get
the source you must
`clone <https://git-scm.com/book/en/v2/Git-Basics-Getting-a-Git-Repository>`__
the HDL repository, and then build the project as follows:.

**Linux/Cygwin/WSL**

.. code-block::
   :linenos:

   user@analog:~$ cd hdl/projects/cn0561/zed
   user@analog:~/hdl/projects/cn0561/zed$ make

A more comprehensive build guide can be found in the :ref:`build_hdl` 
user guide.

Resources
-------------------------------------------------------------------------------

Hardware related
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

-  Product datasheet: :adi:`AD4134`

HDL related
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

-  :git-hdl:`CN0561 HDL project source code <projects/cn0561>`

.. list-table::
   :widths: 30 35 35
   :header-rows: 1

   * - IP name
     - Source code link
     - Documentation link
   * - AXI_CLKGEN
     - :git-hdl:`library/axi_clkgen`
     - :dokuwiki:`[Wiki] <resources/fpga/docs/axi_clkgen>`
   * - AXI_DMAC
     - :git-hdl:`library/axi_dmac`
     - :ref:`here <axi_dmac>`
   * - AXI_HDMI_TX **
     - :git-hdl:`library/axi_hdmi_tx`
     - :dokuwiki:`[Wiki] <resources/fpga/docs/axi_hdmi_tx>`
   * - AXI_I2S_ADI *
     - :git-hdl:`library/axi_i2s_adi`
     - ---
   * - AXI_PWM_GEN
     - :git-hdl:`library/axi_pwm_gen`
     - :dokuwiki:`[Wiki] <resources/fpga/docs/axi_pwm_gen>`
   * - AXI_SDDIF_TX *
     - :git-hdl:`library/axi_spdif_tx`
     - ---
   * - AXI_SYSID
     - :git-hdl:`library/axi_sysid`
     - :dokuwiki:`[Wiki] <resources/fpga/docs/axi_sysid>`
   * - AXI_SPI_ENGINE
     - :git-hdl:`library/spi_engine/axi_spi_engine`
     - :ref:`here <spi_engine axi>`
   * - SPI_ENGINE_EXECUTION
     - :git-hdl:`library/spi_engine/spi_engine_execution`
     - :ref:`here <spi_engine execution>`
   * - SPI_ENGINE_INTERCONNECT
     - :git-hdl:`library/spi_engine/spi_engine_interconnect`
     - :ref:`here <spi_engine interconnect>`
   * - SPI_ENGINE_OFFLOAD
     - :git-hdl:`library/spi_engine/spi_engine_offload`
     - :ref:`here <spi_engine offload>`
   * - AXI_SYSID_ROM
     - :git-hdl:`library/sysid_rom`
     - :dokuwiki:`[Wiki] <resources/fpga/docs/axi_sysid>`
   * - UTIL_I2C_MIXER *
     - :git-hdl:`library/util_i2c_mixer`
     - ---

.. admonition:: Legend
   :class: note

   -  ``*``  instantiated only for Zed carrier
   -  ``**`` instantiated only for Zed and De10Nano carriers

-  :ref:`SPI Engine Framework documentation <spi_engine>`

Software related
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

-  :git-no-os:`CN0561 No-OS project source code <projects/cn0561>`

-  :git-no-os:`AD4134/AD7134 No-OS Driver source code <drivers/adc/ad713x>`

-  :dokuwiki:`AD4134/AD7134 No-OS Driver documentation <resources/tools-software/uc-drivers/ad713x>`

-  :dokuwiki:`How to build No-OS <resources/no-os/build>`

.. include:: ../common/more_information.rst

.. include:: ../common/support.rst