Texas Instruments TMAG5170UEVM Manual de usuario

User’s Guide

TMAG5170UEVM

ABSTRACT

This user’s guide describes the characteristics, operation, and use of the TMAG5170 evaluation module (EVM).

This EVM is designed to evaluate the performance of the TMAG5170. Throughout this document, the terms

evaluation board, evaluation module, and EVM are synonymous with the TMAG5170UEVM. This document

includes a schematic, reference printed circuit board (PCB) layouts, and a complete bill of materials (BOM).

Table of Contents

1 Trademarks..............................................................................................................................................................................1

2 Overview..................................................................................................................................................................................2

2.1 Kit Contents........................................................................................................................................................................2

2.2 Related Documentation From Texas Instruments.............................................................................................................. 2

3 Hardware................................................................................................................................................................................. 3

3.1 Features............................................................................................................................................................................. 3

4 Operation.................................................................................................................................................................................3

4.1 Quick Start Setup............................................................................................................................................................... 3

4.2 EVM Operation...................................................................................................................................................................4

5 Schematics, PCB Layout, and Bill of Materials................................................................................................................. 10

5.1 Schematics.......................................................................................................................................................................10

5.2 PCB Layout...................................................................................................................................................................... 13

5.3 Bill of Materials.................................................................................................................................................................15

6 Revision History................................................................................................................................................................... 16

1 Trademarks

All trademarks are the property of their respective owners.

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2 Overview

The TMAG5170 is a 3-axis linear Hall effect sensor. This device integrates three independent Hall sensors in X,

Y, and Z axes. A precision analog signal-chain along with integrated 12-bit ADC digitizes the measured analog

magnetic field values. The device can be configured further to select one of three magnetic field ranges that suits

the magnet strength and component placements during system calibration.

Table 2-1. TMAG5170 Device Summary

PRODUCT SENSITIVITY RANGE OPTIONS

TMAG5170A1 ±25 mT, ±50 mT, ±100 mT

TMAG5170A2 ±75 mT, ±150 mT, ±300 mT

2.1 Kit Contents

Table 2-2 lists the contents of the EVM kit. Contact the nearest Texas Instruments Product Information Center if

any component is missing.

Table 2-2. Kit Contents

ITEM QUANTITY

TMAG5170UEVM 1

Rotate and push 3D print module 1

Handheld magnet 1

2.2 Related Documentation From Texas Instruments

This user's guide is available from the TI website under literature number SBAU350. Any letter appended to the

literature number corresponds to the document revision that is current at the time of the writing of this document.

Newer revisions are available from www.ti.com or the Texas Instruments' Literature Response Center at (800)

477-8924 or the Product Information Center at (972) 644-5580. When ordering, identify the document by both

title and literature number. Table 2-3 lists documentation related to the EVM. Click the links in Table 2-3 for

further information. The device name links to the product web folder on www.ti.com. The literature number links

to the document PDF.

Table 2-3. Related Documentation

DOCUMENT TITLE

DOCUMENT LITERATURE

NUMBER

TMAG5170 data sheet SBASAF4

TMAG5170-Q1 data sheet SBAS934

TI-SCB User's Guide SLAU839

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3 Hardware

The EVM is an easy-to-use platform for evaluating the main features and performance of the TMAG5170. The

EVM includes a graphical user interface (GUI) used to read and write registers, as well as view and save

measurement results. Also included is a 3D printed Rotate & Push Module to test the common functions of angle

measurement and push button with a single device.

The EVM is intended to provide basic functional evaluation of the devices. The layout is not intended to be a

model for the target circuit, nor is it laid out for electromagnetic compatibility (EMC) testing. The EVM has both

sensitivity variations of the TMAG5170 installed, and may be broken into two separate boards as needed. It is

intended to interface with the TI-SCB, but may be used stand-alone if desired.

3.1 Features

• Snap Apart PCB for evaluation of both TMAG5170A1 and TMAG5170A2 sensitivities

• GUI support to read and write device registers, as well as view and save measurement results

• 3D print rotate and push module

• Detachable EVM for custom use cases

• Conveniently powered from a common micro-USB connector

4 Operation

4.1 Quick Start Setup

The following instructions describe how to set up and use the EVM.

1. Download and install this driver: http://www.ti.com/lit/zip/sbac253

2. Attach the EVM to the Sensor Control Board (TI-SCB) (see Figure 4-1).

3. Connect the EVM to a PC using a USB cable.

a. Insert the micro USB cable into the TI-SCB Controller onboard USB receptacle J2.

b. Plug the other end of the USB cable into a PC.

4. Access the GUI from the below link in either Chrome or Firefox:

a. TMAG5170EVM GUI: https://dev.ti.com/gallery/view/1253127/TMAG5170UEVM_GUI/

5. Apply a magnetic field to the sensor by doing one of the following:

a. Wave the included handheld magnet around the sensor.

b. Use the Rotate & Push Module by attaching it to the EVM (see Figure 4-10). For more details on how to

use this module, see Section 4.2.2.

6. Observe the outputs in the GUI. See Section 4.2.1.3 for more info on GUI setup and operation.

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4.2 EVM Operation

To use the EVM with the included TI-SCB Controller, connect the EVM as shown in Figure 4-1.

Figure 4-1. EVM on TI-SCB Controller

It is optional to snap apart the TMAG5170UEVM to separate the TMAG5170A1 and TMAG5170A2 halves. This

may be done by flexing the PCB at the indicated boundary below

Figure 4-2. TMAG5170UEVM Snap Apart Edge

4.2.1 Setup

4.2.1.1 Driver Installation

Download and install this driver: http://www.ti.com/lit/zip/sbac253. This is a one-time step per computer. Unzip

the folder and run the .exe file with administrator privileges.

4.2.1.2 Firmware

The GUI is capable of loading firmware onto the TI-SCB as described in Section 4.2.1.3.1. Firmware updates will

be pushed through the GUI (requires driver installation). Downloaded offline GUIs may check for GUI/Firmware

updates depending on the version.

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4.2.1.2.1 Firmware Debug

If the firmware gets corrupted or must be manually reinstalled for any reason, follow these steps to reinstall the

firmware.

1. Configure the MCU on the TI-SCB Controller to be in Device Firmware Update (DFU) Mode.

a. It is possible that the MCU has already entered DFU mode. If so, the GUI will notify you and try to

update the firmware to the latest version after the GUI is connected to the PC.

b. DFU mode can be entered manually through one of the following methods while the TI-SCB Controller is

powered on:

• Through software:

– Send the command 'bsl' on the TI-SCB's USB Serial (COM) port.

• Though hardware (with the EVM removed):

– Short the two test points near PK1 and PK2 of the header pins (see Figure 4-3) with a pair of

tweezers (or wire) while pressing the RESET button.

Figure 4-3. Test Points Used to Enter DFU Mode Manually

2. With the MCU in DFU mode, the user can upload the firmware through one of the following methods:

• Through the GUI:

– Plug in the TI-SCB Controller to a PC through the USB port and launch the GUI. DFU mode should be

automatically detected, and the firmware will be uploaded automatically.

• Through the USB Bootstrap Loader (BSL) scripter tool and batch file:

– Download the firmware package and BSL scripter tool from the EVM page, or use the links below.

• TMAG5170EVM: http://www.ti.com/lit/zip/sbac268

– Unzip the firmware folder and run the .bat file.

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4.2.1.3 GUI Setup and Usage

Access the GUI from the below link in either Chrome or Firefox:

• TMAG5170EVM GUI: https://dev.ti.com/gallery/view/1253127/TMAG5170UEVM_GUI

4.2.1.3.1 Initial Setup

To set up the GUI the first time, follow the below instructions:

1. Make sure that the above mentioned driver was installed successfully to ensure that everything works

properly and that the GUI can update the EVM firmware, if necessary.

2. With the EVM/TI-SCB Controller unit plugged to the PC, go to the GUI link provided above.

3. To launch the GUI from the web browser, click the GUI Composer application to open the GUI Composer

window (see Figure 4-4).

Figure 4-4. GUI Composer Application Window

a. For first-time GUI Composer setup, follow the prompts to download the TI Cloud Agent and browser

extension shown in Figure 4-5. These prompts will appear after you close the README.md dialog.

Figure 4-5. TI Cloud Agent

4. Optionally, the GUI can be downloaded for offline use by clicking the icon in the GUI Composer window

shown in Figure 4-4.

Operation www.ti.com

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4.2.1.3.2 GUI Operation

To operate the GUI, follow these steps:

1. Connect to and launch the GUI as described in Section 4.2.1.3.1.

2. With the EVM connected to the GUI, close the README.md file page. The text near the bottom-left hand

corner of the GUI should read Hardware Connected (see Figure 4-6).

Figure 4-6. Hardware Connected

a. If Hardware Connected does not show in the bottom-left hand corner of the GUI, check different

hardware COM ports under Options >> Serial Port (see Figure 4-7).

Figure 4-7. Change Serial Port

b. If the hardware still does not connect, make sure you are using the correct GUI/EVM combination.

3. Click the Registers icon shown in Figure 4-8 (also available on the left side menu) to view the register map,

and change device settings, and enable automatic register read. For questions about a register or register bit

field, select the icon. For more questions about registers, check the data sheet.

Figure 4-8. Registers Page Icon

4. Click the Plots icon to view and save graphical data from the results registers (see Figure 4-9). This is also

available on the left-side menu.

Figure 4-9. Plots Page Icon

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4.2.2 Rotate and Push Demo

To use the rotate and push demo:

1. Attach the Rotate & Push Module to the EVM as shown in Figure 4-10.

Figure 4-10. Rotate & Push Module on EVM

2. In the GUI register page:

a. Make sure that the DEVICE_CONFIG → OPERATING_MODE says (TRIGGER_MODE Active).

b. Make sure that SYSTEM_CONFIG → TRIGGER_MODE is set to the default value.

c. Under the SENSOR_CONFIG register:

i. Make sure both the x and y channels are enabled (MAG_CH_EN).

ii. Set X_RANGE and Y_RANGE to ±100mT for A1 versions, and ±133mT for A2 versions.

iii. Optional: Set ANGLE_EN to X-Y angle calculation.

d. At the top of the register map, set Auto Read to As fast as possible.

3. Go to the Rotate & Push tab inside the plots page (see Figure 4-11).

Figure 4-11. Rotate & Push GUI Page

4. If the push button LEDs are not triggering at every angle or trigger when they are not supposed to, calibrate

the module by doing the following:

a. With the settings set to run the demo, slowly rotate the module 360° and use the plots page to record the

absolute value of the minimum and maximum magnetic field measurements (in mT) for both the X and Y

channels.

b. Adjust the Push threshold calibration value found in the Rotate & Push tab to be about 3-5mT larger than

the maximum value recorded above.

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4.2.3 Direct EVM Serial Communication

If desired, you can directly communicate with the TI-SCB without the use of the GUI through the USB serial

(COM) port. Simply send the desired command string over the serial port and receive the results. This is useful

for interfacing the EVM with custom setups/scripts/GUIs. To read and write registers, follow the below format:

• Read register format: rreg ADR

– Where ADR is the address in hex, and rreg is always lower case

– Register addresses can be in upper or lower case, and do not need to be led by '0x'. The 0 padding

include:

• rreg a

• rreg 0A

• rreg 0x0A

– When '0x' is used, the 'x' must be lower case.

– For the above example, the EVM would return the results in JSON format

{"acknowledge":"rreg 0x0A"}

{"register":{"address":10,:"value":65488}}

{"evm_state":"idle"}

• Write register format: wreg ADR VAL

– where ADR and VAL are in hex, and wreg is always lower case

– Register addresses and values can be in upper or lower case, and do not need to be led by '0x'. The 0

padding register addresses and values is also optional. For example, to write register address 0x1 with the

value 0x01c0, some valid commands include:

• wreg 1 1c0

• wreg 01 0x1c0

• wreg 0x01 0x01C0

– When '0x' is used, the 'x' must be lower case.

– For the above example, the EVM would return the results in JSON format:

{"acknowledge":"wreg 0x01 0x01C0"}

{"console":"Writing 0x1c0 to SENSOR_CONFIG register"}

{"evm_state":"idle"}

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5 Schematics, PCB Layout, and Bill of Materials

Note

Board layouts are not to scale. These figures are intended to show how the board is laid out. The figures are not intended to be used for

manufacturing EVM PCBs.

5.1 Schematics

Figure 5-1 and Figure 5-2 show the schematic of the EVM. Figure 5-1 shows the circuitry for the EVM, and Figure 5-2 shows the mechanical components

included with the EVM.

Schematics, PCB Layout, and Bill of Materials www.ti.com

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