AD5172BRMZ50RL7 - ANALOG DEVICES

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AD5172 FMC-SDP Interposer & Evaluation

Board / Xilinx KC705 Reference Design

Supported Devices

AD5172

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Evaluation Boards

EVAL-AD5172SDZ

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Overview

This document presents the steps to setup an environment for using the EVAL-AD5172SDZ

evaluation board together with the Xilinx KC705 FPGA board and the Xilinx Embedded Development

Kit (EDK). Below is presented a picture of the EVAL-AD5172SDZ Evaluation Board with the Xilinx

KC705 board.

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For component evaluation and performance purposes, as opposed to quick prototyping, the user is

directed to use the part evaluation setup. This consists of:

1. A controller board like the SDP-B ( EVAL-SDP-CS1Z)

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2. The component SDP compatible product evaluation board

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3. Corresponding PC software ( shipped with the product evaluation board)

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The SDP-B controller board is part of Analog Devices System Demonstration Platform (SDP). It

provides a high speed USB 2.0 connection from the PC to the component evaluation board. The PC

runs the evaluation software. Each evaluation board, which is an SDP compatible daughter board,

includes the necessary installation file required for performance testing.

Note: it is expected that the analog performance on the two platforms may differ.

28 Sep 2012 09:32 · Adrian Costina

Below is presented a picture of SDP-B Controller Board with the EVAL-AD5172SDZ Evaluation Board.

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The EVAL-AD5172SDZ evaluation board is a member of a growing number of boards available for the

SDP. Designed to help customers evaluate performance or quickly prototype new AD5172 circuits and

reduce design time, the EVAL-AD5172SDZ evaluation board can operate in single-supply and

dual-supply mode and incorporates an internal power supply powered from the USB. The

EVAL-AD5172SDZ evaluation board is designed to help customers quickly prototype new AD5172

circuits and reduce design time. The EVAL-AD5172SDZ incorporates several test circuits to evaluate

the AD5172 performance.

The AD5172 is dual-channel, 256-position, one-time programmable (OTP) digital potentiometer that

employs fuse link technology to achieve memory retention of resistance settings. OTP is a

cost-effective alternative to EEMEM for users who do not need to program the digital potentiometer

setting in memory more than once. This device performs the same electronic adjustment function as

mechanical potentiometer or variable resistor but with enhanced resolution, solid-state reliability, and

superior low temperature coefficient performance.

More information

AD5172 Product Info - pricing, samples, datasheet

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EVAL-AD5172SDZ evaluation board user guide

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Xilinx KC705 FPGA board

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Getting Started

The first objective is to ensure that you have all of the items needed and to install the software tools

so that you are ready to create and run the evaluation project.

Required Hardware

Xilinx KC705 FPGA board

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FMC-SDP adapter board

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EVAL-AD5172 evaluation board

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Required Software

Xilinx ISE 14.6.

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UART Terminal (Termite/Tera Term/Hyperterminal), baud rate 115200.

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Downloads

AD5172 Driver:

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https://github.com/analogdevicesinc/no-OS/tree/master/device_drivers/AD5172

AD5172 Commands:

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https://github.com/analogdevicesinc/no-OS/tree/master/device_commands/AD5

172

Xilinx Boards Common Drivers:

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https://github.com/analogdevicesinc/no-OS/tree/master/platform_drivers/Xilinx/

SDP_Common

EDK KC705 Reference project:

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https://github.com/analogdevicesinc/fpgahdl_xilinx/tree/master/cf_sdp_kc705

Hardware setup

Before connecting the ADI evaluation board to the Xilinx KC705 make sure that

the VADJ_FPGA voltage of the KC705 is set to 3.3V. For more details on how to

change the setting for VADJ_FPGA visit the Xilinx KC705 product page.

Use the FMC-SDP interposer to connect the ADI evaluation board to the Xilinx KC705 board on the

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FMC LPC connector.

Connect the JTAG and UART cables to the KC705 and power up the FPGA board.

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Reference Project Overview

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The following commands were implemented in this version of EVAL-AD5172 reference project for

Xilinx KC705 FPGA board.

Command Description

help? Displays all available commands.

rdac=

Load the wiper register with a give value. Accepted values:

channel:

0 - select RDAC 1 wiper register.

1 - select RDAC 2 wiper register.

value:

0 .. 255 - value to be written in register.

rdac?

Read back the value of the wiper register. Accepted values:

channel:

0 - select RDAC 1 wiper register.

1 - select RDAC 2 wiper register.

wbuf1? Read back the value of the Wiper Buffer in voltage. (VDD=3.2V)

shutdown=

Shutdown connects wiper to B terminal and open circuits the A terminal. channel:

0 - select RDAC 1 wiper register.

1 - select RDAC 2 wiper register.

shutdown?

Notify about the state of the selected RDAC. channel:

0 - select RDAC 1 wiper register.

1 - select RDAC 2 wiper register.

Commands can be executed using a serial terminal connected to the UART peripheral of Xilinx KC705

FPGA.

The following image shows a generic list of commands in a serial terminal connected to Xilinx KC705

FPGA's UART peripheral.

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Software Project Setup

The hardware platform for each reference projects with FMC-SDP interposer and KC705 evaluation

board is common. The next steps should be followed to recreate the software project of the reference

design:

First download the KC705 Reference project from Github on your computer. You can do this by

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clonning this repository: https://github.com/analogdevicesinc/fpgahdl_xilinx.

From this entire repository you will use cf_sdp_kc705 folder. This is common for all KC705 projects.

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Open the Xilinx SDK. When the SDK starts, it asks you to provide a folder where to store the

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workspace. Any folder can be provided. Make sure that the path where it is located does not contain

any spaces.

In the SDK select the File→Import menu option to import the software projects into the workspace.

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In the Import window select the General→Existing Projects into Workspace option.

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In the Import Projects window select the cf_sdp_kc705 folder as root directory and check the Copy

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projects into workspace option. After the root directory is chosen the projects that reside in that

directory will appear in the Projects list. Press Finish to finalize the import process.

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The Project Explorer window now shows the projects that exist in the workspace without software

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files.

Now the software must be added in your project. For downloading the software, you must use 3

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links from Github given in Downloads section. From there you'll download the specific driver, the

specific commands and the Xilinx Boards Common Drivers(which are commons for all Xilinx boards).

All the software files downloaded must be copied in src folder from sw folder.

Before compilation in the file called Communication.h you have to

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uncomment the name of the device that you currently use. In the picture below

there is an example of this, which works only with AD5629R project. For another

device, uncomment only the respective name. You can have one driver working

on multiple devices, so the drivers's name and the uncommented name may

not be the same for every project.

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The SDK should automatically build the project and the Console window will display the result of the

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build. If the build is not done automatically, select the Project→Build Automatically menu option.

If the project was built without any errors, you can program the FPGA and run the software

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application.

13 Aug 2013 08:22 · Lucian Sin

More information

AD5172 Digital Potentiometer Linux Driver

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ask questions about the FPGA reference design

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Example questions:

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FMCDAQ2 Arria10GX Nios Sourcecode by kairue

❍

ad-fmcomms1-ebz anti aliasing filter features by McG

❍

Using ZC706 and AD-fmcomms3 by 85083074@qq.com

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FM-COMMS3 and FM-COMMS5 with VC707 vs Zync ZC706 by dr8

❍

How Xps ip update to vivado ? by huanmolb@163.com

❍

28 May 2012 14:18

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