EVAL-AD5592R-PMDZ

8-channel, 12-Bit, Configurable ADC/DAC/GPIO with on-chip Reference, SPI Interface Pmod Module

Overview

The EVAL-AD5592R-PMDZ is a minimalist 8-channel, 12-Bit, configurable ADC/DAC/GPIO with on-chip reference, SPI interface Pmod module. This board serves as a low-cost alternative to the full-featured product evaluation boards, with terminal block connections and no extra signal conditioning.

Figure 1 EVAL-AD5592R-PMDZ Evaluation Board

This user guide will focus on the hardware aspect of the EVAL-AD5592R-PMDZ including the connectors, indicators, and different configurations a user would require in order to use the hardware. There is also a link to the design files as well as software reference designs that use the hardware with example embedded firmware for a real demo.

Simplified functional block diagram

Figure 2 AD5592R Functional Block Diagram

Connectors and Configuration

The following section reviews all the hardware connectors and how to interface with them. It also reviews configuration options and well as important onboard indicators.

Analog/Digital I/O Connector (P2 & P3)

Connector	Pin No.	Pin Name	Pin Description
P3	1 2 3 4 5 6	CH3 CH2 CH1 CH0 GND VDD	Channel 3 Input/Output Channel 2 Input/Output Channel 1 Input/Output Channel 0 Input/Output Ground Power Supply
P2	1 2 3 4 5 6	VREF GND CH7 CH6 CH5 CH4	Voltage Reference Ground Channel 7 Input/Output Channel 6 Input/Output Channel 5 Input/Output Channel 4 Input/Output

SPI Pmod Connector (P1)

Connector	Pin No.	Pin Name	ADuCM3029 Pin Function	ADuCM3029 Port No.
SPI_PMOD	1	CS	SPI1_CS0/GPIO25	P1_09
2	MOSI	SPI1_MOSI/GPIO23	P1_07
3	MISO	SPI1_MISO/GPIO24	P1_08
4	SCLK	SPI1_SCLK/GPIO22	P1_06
5	DGND	DGND
6	3.3V	+3.3V
7	IO16	XINT1_WAKE2/GPIO16	P1_00
8	RESET	SYS_HWRST_N
9	RDY	SPI1_RDY/TMR0_OUT/GPIO14	P0_14
10	IO12	SPT0_AD0/GPIO12	P0_12
11	DGND	DGND
12	3.3V	+3.3V

Test Points

Users can also check the SPI signal quality, supply, and reference voltage of the board using test points labeled SS, MOSI, MISO, VLOGIC, and VREF

Figure 3 Test Points Location

Voltage reference configuration

The default connection of the AD5592R VREF pin is shorted at pin 1 of JP1 solder jumper where you can easily configure your voltage reference input at pin 1 of terminal block P2, either from an external source or internal 2.5 V.

Figure 4 Voltage Reference Configuration Jumper

LED Indicator

The DS1 is the power green LED indicator of the board.

Figure 5 Power LED Indicator (DS1)

Power Supply Considerations and Configuration

When using the AD5592R Pmod board, the 3.3 V power for the Pmod comes directly from the host board it is connected to. The power from the host is generally capable of providing up to 100 mA at 3.3 V, but for complete Pmod power specifications, please click here.

Device Driver Support

There are two device driver solutions that are provided for controlling the EVAL-AD5592R-PMDZ:

1. AD5592R no-OS Driver

   • The AD5592R no-OS driver is used in bare-metal applications, typically running on low-power, embedded microcontrollers.

2. AD5592R Linux Driver

   • The AD5592R Linux driver is used in applications running the Linux operating system, typically on larger processors and SoC devices.

   • The AD5592R Linux driver uses the Industrial Input/Output (IIO) framework, greatly simplifying the development of application code via the cross-platform Libiio library, which is written in C and includes bindings for Python, MATLAB, C#, and other languages. Application code can run directly on the platform board, communicating with the device over the local backend, or from a remote host over the network or USB backends.

System Setup Using ADICUP3029

The EVAL-AD5592R-PMDZ can be used with ADICUP3029.

Demo Requirements

The following is the list of items needed in order to replicate this demo.

• Hardware

  • EVAL-ADICUP3029

  • EVAL-AD5592R-PMDZ

  • Micro-USB to USB Cable

  • PC or Laptop with USB Port

• Software

  • PuTTY or other similar software

  • ADuCM3029_demo_AD5592R.hex

Important

There are two basic ways to program the ADICUP3029 with the software for the AD5592R.

1. Dragging and Dropping the Hex to the DAPLink drive

   • Using the drag and drop method, the software is going to be a version that Analog Devices creates for testing and evaluation purposes. This is the EASIEST way to get started with the reference design.

2. Building, Compiling, and Debugging using CCES

   • Importing the project into CrossCore Embedded Studio is going to allow you to change parameters and customize the software to your application, but will a bit more advanced and will require you to download the CrossCore toolchain.

Download

The software for the ADICUP3029_AD5592R demo can be found here:

Prebuilt AD5592R Hex File

• ADuCM3029_demo_AD5592R.hex

Complete AD5592R Source Files

• ADuCM3029_demo_AD5592R Source Code

Setting up the Hardware

1. Connect the EVAL-AD5592R-PMDZ board at connector P8 of the EVAL-ADICUP3029.

   

   Figure 6 EVAL-AD5592R-PMDZ Connected to EVAL-ADICUP3029 at P8

2. Connect a micro-USB cable to the P8 connector of the EVAL-ADICUP3029 and connect it to a computer. The final setup should look similar to the picture below.

   

   Figure 7 Complete Hardware Setup with EVAL-ADICUP3029

3. Make sure the following switches are as shown in the table below.

   

   Figure 8 Switch Configuration Settings

4. From your PC, open My Computer and look for the DAPLINK drive, if you see this then the drivers are complete and correct.

   

   Figure 9 DAPLink Drive in File Explorer

5. Simply extract the provided zip file. Once extracted, you will see the pre-built hex file for the AD5592R demo. Then drag and drop this Hex file to the DAPLINK drive and your ADICUP3029 board will be programmed. The DS2 (red) LED will blink rapidly.

6. The DS2 will stop blinking and will stay ON once the programming is done.

7. Open PuTTY or other similar software. Check the Device Manager to set the correct COM port for the ADICUP3029. Set the baud rate to 115200.

   

   Figure 10 PuTTY Configuration Settings

8. The expected output viewed in the PuTTY is shown below.

   

   Figure 11 Expected Output in PuTTY Terminal

System Setup Using Raspberry Pi

The EVAL-AD5592R-PMDZ can be used with a Raspberry Pi.

Demo Requirements

The following is a list of items needed in order to replicate this demo.

• Hardware

  • EVAL-AD5592R-PMDZ

  • PMOD to Raspberry Pi Adapter (PMD-RPI-INTZ)

  • Raspberry PI Zero, Zero W, 3B+, or 4

  • 16GB (or larger) Class 10 (or faster) micro-SD card

  • 5Vdc, 2.5A power supply with micro USB connector (USB-C power supply for Raspberry Pi 4)

  • User interface setup (choose one):

    • HDMI monitor, keyboard, and mouse plugged directly into Raspberry Pi

    • Host Windows/Linux/Mac computer on the same network as Raspberry Pi

• Software

  • Kuiper Linux Image

Loading Image on SD Card

In order to boot the Raspberry Pi and control the EVAL-AD5592R-PMDZ, you will need to install ADI Kuiper Linux on an SD card. Complete instructions, including where to download the SD card image, how to write it to the SD card, and how to configure the system are provided on the Kuiper Linux Image

Configuring the SD Card

Follow the configuration procedure under Configuring the SD Card for Raspberry Pi Projects on the Kuiper Linux Image page, substituting the following lines in config.txt:

dtoverlay=rpi-ad5592r

Setting up the Hardware

To set up the circuit for evaluation, consider the following steps:

1. Connect the P9 of the PMOD to Raspberry Pi Interposer board at the male header GPIO pin connector of the Raspberry Pi as shown below.

   

   Figure 12 Pmod to Raspberry Pi Interposer Connection

2. Connect the EVAL-AD5592R-PMDZ on the PMOD to Raspberry Pi Interposer board either via Port P1 or P2.

   

   Figure 13 EVAL-AD5592R-PMDZ Connected to Raspberry Pi via Interposer

3. Burn the SD card with the proper ADI Kuiper Linux image. Insert the burned SD card into the designated slot on the RPi.

4. Connect the system to a monitor using an HDMI cable through the mini HDMI connector on the RPi.

5. Connect a USB keyboard and mouse to the RPi through the USB ports.

6. Power on the RPi board by plugging in a 5V power supply with a micro-USB connector. The final setup should look similar to the picture below.

   

   Figure 14 Complete Raspberry Pi Setup

Application Software (All Platforms)

Hardware Connection

The Libiio is a library used for interfacing with IIO devices and is required to be installed on your computer.

Download

Download and Install the latest Libiio package on your machine.

To be able to connect your device, the software must be able to create a context. The context creation in the software depends on the backend used to connect to the device as well as the platform where the EVAL-AD5592R-PMDZ is attached. Two platforms are currently supported for the AD5592R: Raspberry Pi using the ADI Kuiper Linux and the ADICUP3029 running the no-OS AD5592R demo project. The user needs to supply a URI which will be used in the context creation.

The iio_info command is a part of the libIIO package that reports all IIO attributes.

Upon installation, simply enter the command on the terminal command line to access it.

For RPI Direct Local Access:

iio_info

For Windows machine connected to Raspberry Pi:

iio_info -u ip:<ip address of your ip>

Example:

• If your Raspberry Pi has the IP address 192.168.1.7, you have to use iio_info -u ip::192.168.1.7 as your URI

Note

Do note that the Windows machine and the RPI board should be connected to the same network in order for the machine to detect the device.

IIO Commands

There are different commands that can be used to manage and control the device being used. The iio_attr command reads and writes IIO attributes.

analog@analog:~$ iio_attr [OPTION]...

Example:

• To look at the context attributes, enter this code on the terminal:

analog@analog:~$ iio_attr -a -C

The iio_reg command reads or writes SPI or I2C registers in an IIO device. This is generally not needed for end applications but can be useful in debugging drivers. Note that you need to specify a context using the -u qualifier when you are not directly accessing the device via RPI or when you are using the ADICUP3029 platform.

analog@analog:~$ iio_reg -u <context> <device> <register> [<value>]

Example:

• To read the device ID (register = 0x02) of an AD5592R interfaced via RPI from a Windows machine, enter the following code on the terminal:

  iio_reg -u ip: ad5592r 0x02
  

IIO Oscilloscope

Caution

Make sure to download/update to the latest version of IIO-Oscilloscope found on this link

1. Once done with the installation or an update of the latest IIO-Oscilloscope, open the application. The user needs to supply a URI which will be used in the context creation of the IIO Oscilloscope and the instructions can be seen in the previous section.

2. Press refresh to display available IIO Devices, once ad5592r appeared, press connect.

   

   Figure 15 IIO Oscilloscope Connection Screen

Debug Panel

Below is the Debug panel of AD5592R wherein you can directly access the attributes of the device.

Figure 16 IIO Oscilloscope Debug Panel for AD5592R

DMM Panel

Access the DMM panel to see the instantaneous reading of the device temperature and voltages.

Figure 17 IIO Oscilloscope DMM Panel

PyADI-IIO

PyADI-IIO is a Python abstraction module for ADI hardware with IIO drivers to make them easier to use. This module provides device-specific APIs built on top of the current libIIO Python bindings. These interfaces try to match the driver naming as much as possible without the need to understand the complexities of libIIO and IIO.

Follow the step-by-step procedure on how to install, configure, and set up PyADI-IIO and install the necessary packages/modules needed by referring to the PyADI-IIO documentation.

Running the example

After installing and configuring PYADI-IIO in your machine, you are now ready to run Python script examples. In our case, run the ad5592r_example.py found in the examples folder.

D:\pyadi-iio\examples>python ad5592r_example.py

Press enter. Input desired voltage levels and you will get these readings.

Figure 18 PyADI-IIO Example Output

Download

Github link for the Python sample script: AD5592R Python Example

More Information and Useful Links

• AD5592R Product Page

• EVAL-AD5592R-PMDZ

• AD5592/AD5593 Pmod ADICUP3029 Demo

Schematic, PCB Layout, Bill of Materials

Download

EVAL-AD5592R-PMDZ Design & Integration Files

• Schematics

• PCB Layout

• Bill of Materials

• Allegro Project

Additional Information

• PyADI-IIO

• Libiio command line utility

• IIO Oscilloscope

• ADI Kuiper Linux

Registration

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