Texas Instruments TDC1000-GASEVM Bedienungsanleitung

TDC1000-GASEVM User’s Guide

User's Guide

Literature Number: SNIU026A

March 2015–Revised December 2015

Contents

1 General Overview................................................................................................................. 5

2 TDC1000-GASEVM vs. TDC1000-TDC72000EVM ...................................................................... 5

3 EVM Package Contents......................................................................................................... 5

4 Software ............................................................................................................................. 5

5 Setup.................................................................................................................................. 6

6 Software Installation............................................................................................................. 8

6.1 Graphical User Interface (GUI)......................................................................................... 8

7 TDC1000-BSTEVM Setup and Operation ................................................................................. 9

7.1 Connections............................................................................................................... 9

8 Launching the Software ...................................................................................................... 10

9 Clock Selection.................................................................................................................. 14

9.1 Steps to Select the CPU Clock ...................................................................................... 14

10 Possible Excitation Pulses ................................................................................................. 17

11 Troubleshooting................................................................................................................. 18

11.1 Boost converter ......................................................................................................... 18

11.2 Jumper ................................................................................................................... 18

11.3 Firmware Upgrade...................................................................................................... 19

12 TDC1000-GASEVM Board Layout ......................................................................................... 21

13 TDC1000-GASEVM Schematic.............................................................................................. 29

14 TDC1000-BSTEVM Board Layout.......................................................................................... 32

15 BSTEVM Schematic............................................................................................................ 33

Revision History.......................................................................................................................... 34

2Table of Contents SNIU026A–March 2015–Revised December 2015

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List of Figures

1 TDC1000-GASEVM ......................................................................................................... 6

2 TDC1000-BSTEVM Board.................................................................................................. 7

3 TDC1000-7200EVM Installation Directory................................................................................ 8

4 TDC1000-BSTEVM Plugged into TDC1000-TDC7200EVM ........................................................... 9

5 SETUP Tab in TDC1000-TDC7200EVM................................................................................ 11

6 Top to Bottom: START Pulse, Voltage on VDD Pin of UCC Driver, Voltage Across Connector J1, EN1

Signal on Oscilloscope .................................................................................................... 12

7 Top to Bottom: TDC1000's START Pulse (Dark Blue), TDC1000's Tx Signal (Light Blue), and the

Boosted 30 V of TD1000's Tx Signal (Green).......................................................................... 13

8 Place Jumper on JP6 to Use the CPU Clock........................................................................... 14

9 Select CPU-CLK............................................................................................................ 15

10 Clock Options............................................................................................................... 16

11 Excitation Pulses Chart.................................................................................................... 17

12 Jumper....................................................................................................................... 18

13 Connection Error Pop-up Window ....................................................................................... 19

14 USB Firmware Upgrade Window......................................................................................... 20

15 Top Overlay................................................................................................................. 21

16 Top Solder Mask ........................................................................................................... 22

17 Top Layer.................................................................................................................... 23

18 Mid Layer 1.................................................................................................................. 24

19 Mid Layer 2.................................................................................................................. 25

20 Bottom Layer................................................................................................................ 26

21 Bottom Solder Mask ....................................................................................................... 27

22 Board Dimensions.......................................................................................................... 28

23 TDC1000-GASEVM Schematic 1........................................................................................ 29

24 TDC1000-GASEVM Schematic 2........................................................................................ 30

25 TDC1000-GASEVM Schematic 3........................................................................................ 31

26 BSTEVM Layout............................................................................................................ 32

27 TDC1000-BSTEVM ........................................................................................................ 33

SNIU026A–March 2015–Revised December 2015 List of Figures

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List of Tables

1 Jumper....................................................................................................................... 18

4List of Tables SNIU026A–March 2015–Revised December 2015

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User's Guide

SNIU026A–March 2015–Revised December 2015

TDC1000-GASEVM and TDC1000-BSTEVM Kit User’s

Guide

1 General Overview

This user's guide details the use of the TDC10000-GASEVM, which is comprised of two boards. The first

board is the main TDC1000-GASEVM, which includes an on-board TDC1000 (ultrasonic analog-front-

end), TDC7200 (time-to-digital converter), and MSP430 microcontroller. The purpose of this board is to

excite the transducers, receive the returned echo, generate the STOP pulses, and digitize the time-of-flight

to the MSP430 for further processing. This main board connects with a separate TDC1000-BSTEVM

board (referred to as HV board for the remainder of this document). The purpose of the HV board is to

boost the transmit pulses from 3.7V-to-30V to get a better received echo for applications where a higher

range is necessary or when the ultrasonic medium is a gas or is exposed to vibration.

2 TDC1000-GASEVM vs. TDC1000-TDC72000EVM

The TDC1000-GASEVM is compatible with the Firmware and GUI of the TDC1000-TDC72000EVM since

all the components are the same. However, the TDC1000-GASEVM has the following component

changes to facilitate rapid evaluation for water/gas flow applications.

1. The TDC1000-GASEVM has been designed for Gas Flow applications. The passive components that

determine the first order filter of the Rx signal path have been tuned for frequencies between 58 kHz to

300 KHz.

2. The resistors connecting the TX2/RX1 and TX1/RX2 channel have been removed to enable the

TDC1000-GASEVM to be used with the TDC1000-BSTEVM. When resistors have been removed, the

transmitting pulses increase from 3.7 V to 30 V.

3 EVM Package Contents

The TDC1000-GASEVM evaluation kit contains the following:

• On board TDC1000 (ultrasonic analog-front-end) and TDC7200 (time-to-digital converter)

• On board MPS430 microcontroller

• USB Mini-B to USB-A plug cable

The TDC1000-BSTEVM kit contains the following:

• On board LM2733XMF boost converter

• On board UCC27531 Gate drivers

• Connectors to plug into the TDC1000-GASEVM or TDC1000-TDC7200EVM

4 Software

The firmware and GUI is the same as the TDC1000-TDC7200 EVM. For detail information about the GUI

and troubleshooting the software, see the TDC100-TDC7200EVM User's Guide SNIU021.

SNIU026A–March 2015–Revised December 2015 TDC1000-GASEVM and TDC1000-BSTEVM Kit User’s Guide

Setup

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5 Setup

1. Download TDC1000-TDC7200 Software (same software for TDC1000_GASEVM)

2. Install the GUI. For detailed information, see Section 6.

3. Connect TDC1000-BSTEVM to TDC1000-GASEVM

4. Connect a gas pipe transducers to the TDC1000-BSTEVM

5. Connect the EVM board to the computer with a USB cable (J2).

6. Launch the GUI. See Section 8

7. On the GUI's “SETUP” tab, select the "TDC1000-HV Boost Power Enable", “TDC1000-HV Driver EN1”

and/or “TDC1000-HV Driver EN2” depending on which TX port your transducer is connected to.

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

9. Select an "EN period (us)" in that matches your excitation duration in μs. For instance if you are using

a 200Khz transducer with 10 excitation pulses the duration = (# pulses/Xmit freq)*1e6+30us or 80 us.

10. Run the GUI as explained in SNIA020

Figure 1. TDC1000-GASEVM

6TDC1000-GASEVM and TDC1000-BSTEVM Kit User’s Guide SNIU026A–March 2015–Revised December 2015

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Setup

Figure 2. TDC1000-BSTEVM Board

SNIU026A–March 2015–Revised December 2015 TDC1000-GASEVM and TDC1000-BSTEVM Kit User’s Guide

Software Installation

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6 Software Installation

6.1 Graphical User Interface (GUI)

Installing the TDC1000-GASEVM GUI software:

1. Download the GUI http://www.ti.com/product/TDC1000/toolssoftware

2. Unzip the downloaded file into a known directory and run it

3. Follow the pop-up screen instructions. Click “Next” to install the software.

Figure 3. TDC1000-7200EVM Installation Directory

4. When the installation is done, click “Finish”.

8TDC1000-GASEVM and TDC1000-BSTEVM Kit User’s Guide SNIU026A–March 2015–Revised December 2015

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TDC1000-BSTEVM Setup and Operation

7 TDC1000-BSTEVM Setup and Operation

7.1 Connections

1. Connect the USB cable (J2) from the TDC1000-GASEVM to the PC.

2. Plug the TDC1000-BSTEVM (HV board) into the TDC1000-GASEVM (see Figure 4).

3. Attach the transducer wires to the connectors J1 and J2 on the HV board.

On the TDC1000-GASEVM, make sure the following jumpers are in place.

1. JP1: TDC7200 - connect pin 1 to pin 2 (via a jumper)

2. JP2: CPU - connect pin 1 to pin 2 (via a jumper)

3. JP3: TDC1000 - connect pin 1 to pin 2

4. JP4: VIO - connect pin 1 to pin 2

5. JP5: Trigger - connect pin 2 to pin 3

6. JP6: CLOCK - connect pin 5 to pin 6

Figure 4. TDC1000-BSTEVM Plugged into TDC1000-TDC7200EVM

SNIU026A–March 2015–Revised December 2015 TDC1000-GASEVM and TDC1000-BSTEVM Kit User’s Guide

Launching the Software

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8 Launching the Software

1. The TDC1000_TDC7200EVM GUI software can be run by clicking on Start >> All Programs >>

Texas Instruments >> TDC1000_7200.

2. See TDC100-TDC7200EVM_Users_Manual (SNIA020) on how to use the GUI

3. When using the HV board: Go to the “SETUP” tab on the TDC1000-7200EVM GUI and select

"TDC1000-HV Boost Power Enable" to enable the 30V boost supply. The supply will remain on

constantly (Always ON) unless a different time period is selected via the pulldown box. The capacity to

reduce the Boost power supply active time is to enable very low power applications testing so the

BOOST supply is only active during the measurement cycle time. Next make sure to select either

“TDC1000-HV Driver EN1” or “TDC1000-HV Driver EN2” -- or both of them by checking the respective

box.

(a) Select an "EN period (us)" in µs. This is the time the EN will stay HIGH after the START pulse of

the EVM. EN will go high about 30 µs before START to ensure that the driver ICs on the HV

interface board are powered up in time for the first Tx pulses. Example: If you choose an EN period

of 40 µs (default = 30 µs), you will see a EN pulse with the length of 70 µs, because it consists of

the constant 30 µs before the START signal plus whatever you choose for EN period.

(b) A longer EN period can be used to dampen the oscillation of the ultrasonic transducers. After the

last Tx pulse, the output of the driver IC will be pulled to ground via the 110-Ωresistor that is on the

board until the voltage on the VDD pin drops below about 3 V.

4. You can set the “EN period” for EN1 and EN2 separately, but whichever is higher will be applied to

BOTH enables if EN1 and EN2 are checked.

5. If you choose to use one channel with 5V pulses and the other with 30V, you can bypass the HV driver

of Channel 2. Make sure to uncheck the box "TDC1000-HV Driver EN2" in the GUI and to also place

the jumper JP1 on the HV board to "LV" for low voltage.

10 TDC1000-GASEVM and TDC1000-BSTEVM Kit User’s Guide SNIU026A–March 2015–Revised December 2015

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