Texas Instruments TDC7200EVM Manuale utente

TDC7200EVM User’s Guide

User's Guide

Literature Number: SNAU177

January 2015

Contents

1 EVM Key Features ............................................................................................................... 4

2 EVM.................................................................................................................................... 5

3 Equipment List .................................................................................................................... 6

4 Quick Start.......................................................................................................................... 6

5 Software Installation............................................................................................................. 7

5.1 Installing the TDC7200 GUI............................................................................................. 7

5.2 MSP430 Firmware Upgrade ............................................................................................ 7

5.3 Checking Connection.................................................................................................... 8

5.4 Opening the GUI ......................................................................................................... 9

6 Hardware Configuration ...................................................................................................... 10

6.1 EVM Connections....................................................................................................... 10

6.2 Jumpers ................................................................................................................. 13

7 GUI and Operation.............................................................................................................. 13

8 Board Layout..................................................................................................................... 16

9 Bill of Materials .................................................................................................................. 19

2Table of Contents SNAU177–January 2015

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List of Figures

1 TDC7200EVM Evaluation Board .......................................................................................... 5

2 Upgrading MSP430 Firmware.............................................................................................. 7

3 Device Manager.............................................................................................................. 8

4 TDC7200 GUI ................................................................................................................ 9

5 START and STOP Signals Scope Shot................................................................................. 11

6 TDC7200EVM Connection................................................................................................ 12

7 Recommended TDC7200 Register Configuration (Default Settings)................................................ 13

8 Graphing..................................................................................................................... 14

9 Measurement Results ..................................................................................................... 14

10 Top Assembly Layer....................................................................................................... 16

11 Bottom Layer................................................................................................................ 17

12 Schematic ................................................................................................................... 18

List of Tables

1 TDC7200 Bill of Materials................................................................................................. 19

SNAU177–January 2015 List of Figures

User's Guide

SNAU177–January 2015

General Description

This guide details the use of the TDC7200EVM evaluation module (referred to as EVM for the remainder

of this document). The TDC7200EVM is an evaluation module that allows users to evaluate the operation

and performance of the TDC7200 Time-to-Digital Converter. One example application that requires

accurate time-to-digital conversion is flow sensing. For this, the TDC7200 can be used with the TDC1000

ultrasonic analog-front-end to capture accurate time sensing for water/gas/heat flow meters. The EVM

connects to the MSP430 LaunchPad evaluation kit for capturing data, and it connects to a user-friendly

Graphic User Interface (GUI) to modify the registers and display the data.

1 EVM Key Features

1. Evaluate TDC7200 Time-to-Digital Converter

2. EVM connect with MSP430 Launch Pad (MSP-EXP430F5529LP)

3. User friendly TDC7200 GUI interface

4. Connection for START and STOP inputs

5. Powered by MSP430 LaunchPad (no external power needed)

4General Description SNAU177–January 2015

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EVM

2 EVM

Figure 1. TDC7200EVM Evaluation Board

SNAU177–January 2015 General Description

Equipment List

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3 Equipment List

1. TDC7200EVM

2. TDC7200 GUI

3. MSP430 launchpad (http://www.ti.com/tool/msp-exp430f5529lp)

4. Micro-USB cable

5. Dual function generator (for example: Tektronix’s AFG3102)

6. PC with Windows XP or Windows 7

7. 2 BNC-to-SMA cables

4 Quick Start

1. Download and Install TDC7200EVM (GUI) Software. See Section 5 for more information.

2. Connect the USB cable from the MSP430 LaunchPad to the PC

3. Connect the TDC7200EVM to the MSP430 LaunchPad via J1 and J2

4. Connect START and STOP pulses to the TDC7200EVM via J5 and J4. See Section 6 for more

information.

5. Launch the GUI. See Section 7 for more information

6. On the “GRAPH” tab, press the “START GRAPH” button.

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Software Installation

5 Software Installation

This section describes software installation, firmware upgrade, and how to update USB Driver.

5.1 Installing the TDC7200 GUI

1. Download the TDC7200 Software GUI zip file to your desktop.

2. Unzip the file.

3. Run the setup.exe file.

4. Follow the instructions to install the GUI.

5. Once done, you should be able to see the installation in your folder, for example, C:\ folder, such as

C:\Program Files (x86)\Texas Instruments\TDC7200EVM.

6. Note: as part of this GUI installation, the GUI driver for the TDC7200EVM is also installed.

5.2 MSP430 Firmware Upgrade

1. Open the TDC7200 GUI.

2. Click on the Debug tab.

3. Click on “Update Firmware”.

4. Click Next to proceed on the first prompt; read and accept the license agreement, and click Next to

continue.

5. Choose “ Select Firmware”, and then hit “Browse”

(a) Go to the folder where you downloaded the TDC7200 GUI. For example: C:\Program Files

(x86)\Texas Instruments\TDC7200EVM

(b) Find the Firmware folder . For example: C:\Program Files (x86)\Texas

Instruments\TDC7200EVM\Firmware

6. On the MSP430 LaunchPad board, press the BSL button (S5 or S3) and connect the MSP430

Launch Pad to your PC using a USB cable. If detected, the text on the Firmware Upgrade tool

changes from No device connected to Found 1 device. See Figure 2.

7. On the MSP430 USB Firmware Upgrade GUI, click “Upgrade Firmware”.

8. Click “Close” when done.

Figure 2. Upgrading MSP430 Firmware

SNAU177–January 2015 General Description

Software Installation

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5.3 Checking Connection

1. If you haven’t done so, connect the USB cable from the MSP430 Launch Pad to your PC.

2. If you haven’t done so, connect the TDC7200EVM to the MSP430 Launch Pad via J1 and J2 as shown

in Figure 6.

3. Open the computer’s Device Manager . This can be done by right clicking on “My Computer", choose

“Properties”, then click on “Device Manager”.

4. Scroll down to “Ports (COM &LPT)”

5. You should be able to see the “TDC7200EVM (COMx)” as shown in Figure 3

Figure 3. Device Manager

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Software Installation

5.4 Opening the GUI

1. If you haven’t done so, connect the USB cable from the MSP430 Launch Pad to your PC.

2. If you haven’t done so, connect the TDC7200EVM to the MSP430 Launch Pad via J1 and J2 as shown

in Figure 6.

3. Run the TDC7200 GUI from the “Start Menu”. By default, it is located in “Programs\Texas

Instruments\TDC7200EVM”

4. GUI should automatically connect and show the screen depicted in Figure 4.

Figure 4. TDC7200 GUI

SNAU177–January 2015 General Description

Hardware Configuration

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6 Hardware Configuration

This section describes how to properly set up the connections on the EVM

6.1 EVM Connections

1. If you haven’t done so, connect the USB cable from the MSP430 Launch Pad to your PC.

2. If you haven't done so, connect the TDC7200EVM to the MSP430 Launch Pad via J1 and J2 as shown

in Figure 6.

3. Setting the Dual Channel Function Generator (for example: Tektronix’s AFG3102):

(a) Set channel 1 of the dual function generator to as follows (see Figure 5):

(i) Pulse 1-Cycle

(ii) Burst mode

(iii) Freq = 40kHz

(iv) Delay = 0s

(v) Amplitude = 3.3Vpp

(vi) Offset = 1.65V

(vii) Duty = 20%

(b) Set channel 2 of the dual function generator to as follows (see Figure 5):

(i) Pulse 1-Cycle

(ii) Burst mode

(iii) Freq = 40 kHz

(iv) Delay = 19us --> this is the time-of-flight (TOF)

(v) Amplitude = 3.3 Vpp

(vi) Offset = 1.65 V

(vii) Duty = 20%

10 General Description SNAU177–January 2015

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