CN0579 HDL project

Overview

The CN0579 is a 4-channel, high resolution, wide bandwidth, high dynamic range, integrated electronics piezoelectric (IEPE)-compatible interface data acquisition (DAQ) system that interfaces with IC piezoelectric (ICP®)/IEPE sensors. The solution provides flexible sensor interfacing to either piezoelectric or micro-electromechanical systems (MEMS) sensor with measurement capabilities that extend the frequency response to DC.

The design provides four channels of full bandwidth, synchronized vibration data to the processor, where data analysis can be done locally or on a remote host over Ethernet via standard IIO framework. Large buffers of continuous data can be streamed and analyzed using standard fast Fourier transform (FFT) techniques for system characterization and machine learning algorithms.

Supported boards

• CN0579

Supported devices

• AD7768-4

• AD5696R

• ADA4945-1

• ADG5421F

Supported carriers

Evaluation board	Carrier	FMC slot
CN0579	Cora Z7S	Arduino headers
	DE10-Nano	Arduino headers

Block design

Block diagram

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

Clock scheme

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 CPU/Memory interconnects addresses).

Instance	Zynq	Cyclone V
axi_ad77684_adc	0x44A0_0000	0x0002_8000
cn0579_dma	0x44A3_0000	0x0003_0000
axi_iic_dac*	0x44A4_0000	—

Legend

* instantiated only for Cora Z7S

I2C connections

I2C type	I2C manager instance	Alias	Address	I2C subordinate
PL*	axi_iic	axi_iic_dac	0x0C	AD5696R
PS**	I2C1		0x0C	AD5696R

Legend

• * only for Cora Z7S

• ** only for DE10-Nano

SPI connections

SPI type	SPI manager instance	SPI subordinate	CS
PS*	SPI 0	AD7786-4	0
PL**	SYS_SPI	AD7786-4	0

Legend

• * only for Cora Z7S

• ** only for DE10-Nano

GPIOs

GPIO signal	Direction	HDL GPIO EMIO	Software GPIO	Software GPIO
	(from FPGA view)		Zynq-7000	Cyclone V
RESET_N	OUT	32	86	0

Interrupts

Below are the Programmable Logic interrupts used in this project.

Instance name	HDL	Linux Zynq	Actual Zynq	Linux Cyclone V	Actual Cyclone V
cn0579_dma*	12	56	88	—	—
axi_iic_ard*	11	55	87	—	—
cn0579_dma**	5	—	—	45	77

Legend

• * only for Cora Z7S

• ** only for DE10-Nano

Building the HDL project

The design is built upon ADI’s generic HDL reference design framework. ADI distributes the bit/elf files of these projects as part of the ADI Kuiper Linux. If you want to build the sources, ADI makes them available on the HDL repository. To get the source you must clone the HDL repository, and then build the project as follows:

Linux/Cygwin/WSL

Building the CoraZ7S project:

~$

cd hdl/projects/cn0579/coraz7s

~/hdl/projects/cn0579/coraz7s$

make

Building the DE-10Nano project:

~$

cd hdl/projects/cn0579/de10nano

~/hdl/projects/cn0579/de10nano$

make

A more comprehensive build guide can be found in the Build an HDL project user guide.

Resources

Systems related

• [Wiki] EVAL-CN0579-ARDZ User Guide

• Circuit Note CN0579

Hardware related

• Product datasheets:

  • AD7768-4

  • AD5696R

  • ADA4945-1

  • ADG5421F

HDL related

• CN0579 HDL project source code

IP name	Source code link	Documentation link
AXI_AD7768	library/axi_ad7768	AXI AD7768
AXI_DMAC	library/axi_dmac	AXI DMAC
AXI_SYSID	library/axi_sysid	AXI System ID
SYSID_ROM	library/sysid_rom	AXI System ID
UTIL_CPACK2	library/util_pack/util_cpack2	Channel CPACK Utility

Software related

• [Wiki] AD7768 IIO Precision ADC Linux Driver

• Python support:

  • PyADI-IIO documentation

  • PyADI-IIO CN0579 class

  • PyADI-IIO CN0579 example

• CN0579 on Cora Z7s Linux device tree

  arch/arm/boot/dts/zynq-coraz7s-cn0579_i2c.dts

• CN0579 on DE-10Nano Linux device tree

  arch/arm/boot/dts/socfpga_cyclone5_de10_nano_cn0579_i2c.dts

• AD7768 Linux driver ad7768.c

More information

• ADI HDL User guide

Support

Analog Devices, Inc. will provide limited online support for anyone using the reference design with ADI components via the EngineerZone FPGA reference designs forum.

For questions regarding the ADI Linux device drivers, device trees, etc. from our Linux GitHub repository, the team will offer support on the EngineerZone Linux software drivers forum.

For questions concerning the ADI No-OS drivers, from our No-OS GitHub repository, the team will offer support on the EngineerZone microcontroller No-OS drivers forum.

It should be noted, that the older the tools’ versions and release branches are, the lower the chances to receive support from ADI engineers.