CN0565 no-OS Example Project

See projects/cn0565 (doxygen) for the Doxygen documentation.

The EVAL-CN0565-ARDZ is a specialized evaluation board for Electrical Impedance Tomography (EIT). Designed to be cost-effective and non-radiative, it utilizes impedance measurements to visualize internal structures. The board can handle setups with up to 24 electrodes, supported by a 12-channel crosspoint switch for efficient multi-electrode operation. Enhanced safety and reliability are prioritized through its power isolation features. Aligning with Arduino standards, this board is compatible with various development platforms and serves well in applications requiring detailed electrical impedance analysis, particularly beneficial in non-invasive medical imaging.

Applications

Electrical impedance tomography
Bioimpedance applications
Medical imaging

Hardware Specifications

Power Supply Requirements

The EVAL-CN0565-ARDZ board relies on a 5 V supply provided by the host platform. This supply powers an ADuM5020 isolated DC-to-DC converter, which generates an isolated 5V output at 500 mW. This isolated output drives the impedance measurement circuitry. Additionally, the 5V is regulated to 3.3V by the ADM7150 to supply 120 mA for components such as the AD5940. The AD8829 inverter converts the isolated 5V to a ±5V dual supply for other parts of the circuit, ensuring stable and isolated power vital for accurate impedance measurements.

On-board Connectors

EVAL-CN0565-ARDZ Connectors

Connector	Description
P1	DUT Connections - Common for various device under test connections
P7	Commonly used for power and communication interface connections

EVAL-ADICUP3029 Connectors

Connector	Description
P10	Micro-USB power connection to the Carrier Board

EVAL-CN0565-ARDZ Digital Communication Pins

Pin Name	Mnemonic	Function
P5-2	IOVDD	Power - regulated supply for sensor
P5-4	3V	Power Supply, 3V
P5-5	5V	Power Supply, 5V
P7-2	MOSI	Master Out, Slave In - transmit data
P7-3	MISO	Master In, Slave Out - receive data
P7-4	SCK	SPI Clock - synchronizes data transfer
P7-6	GND	Ground

Carrier Board - Digital Communication Pins

Arduino DIO High	ADuCM3029 Pin
Pin Name	Function
SCL	I2C0_SCL / GPIO04
SDA	I2C0_SDA / GPIO05
AREF	VREF+
AGND	Analog Ground
SCLK	SPI0_CLK / GPIO00
MISO	SPI0_MISO / GPIO02
MOSI	SPI0_MOSI / GPIO01
CS	SPI10_CS1 / GPIO26
RDY	SPI_RDY / GPIO30
IO28	GPIO28

No-OS Build Setup

Please see: https://wiki.analog.com/resources/no-os/build

No-OS Supported Examples

The initialization data used in the examples is taken out from the Project Data Source Path.

IIO Example

The IIO example code for the EVAL-CN0565-ARDZ board in the no-OS project interfaces with the AD5940 and ADG2128 components to facilitate EIT. The code initializes the IIO interfaces for both components, configures UART parameters, and sets up an array of devices passed to the IIO application initialization function. It supports various platforms like STM32 and ADuCM3029, allowing data streaming and interaction with host systems through the IIO Daemon (IIOD) for real-time data exchange and device control, crucial for detailed impedance analysis.

This project is actually an IIOD demo for EVAL-CN0565-ARDZ board. The project launches a IIOD server on the board so that the user may connect to it via an IIO client. Using IIO Oscilloscope, the user can configure the ADC and view the measured data on a plot.

If you are not familiar with ADI IIO Application, please take a look at: IIO No-OS.

If you are not familiar with ADI IIO-Oscilloscope Client, please take a look at: IIO Oscilloscope.

The No-OS IIO Application together with the No-OS IIO AD5940 and ADG2128 drivers take care of all the back-end logic needed to setup the IIO server.

In order to build the IIO project, make sure you have the following configuration in the Makefile:

IIOD=y

No-OS Supported Platforms

ADuCM Platform

Used Hardware

EVAL-CN0565-ARDZ evaluation board
EVAL-ADICUP3029 development platform

Connections

Component	Connection Details
EVAL-CN0565-ARDZ	Align with EVAL-ADICUP3029 so connectors match
Arduino Headers	Use male and female header pins to securely attach EVAL-CN0565-ARDZ on top of ADICUP3029
Micro USB Cable	Connect to EVAL-ADICUP3029 from USB power source or PC
UART Switch (S2) on EVAL-ADICUP3029	Set to middle position to enable UART via Arduino connector
DS2 LED on EVAL-CN0565-ARDZ	Should turn green to confirm power is received

Build Command

cd no-OS/projects/cn0565

export PLATFORM=aducm3029
# to build the project
make
# to flash the code
make run
# to debug the code
make debug

STM32 Platform