Texas Instruments BoosterPack BOOST-DRV8848 User manual

User's Guide
SLVUAE1–December 2014
BOOST-DRV8848
This document is provided with the BOOST-DRV8848 dual brushed-motor BoosterPack™ as a
supplement to the DRV8848 datasheet (SLLSEL7). This application report details the hardware setup and
operation of the BoosterPack.
Contents
1 Hardware Views.............................................................................................................. 2
2 Introduction to the BOOST-DRV8848..................................................................................... 3
2.1 Features.............................................................................................................. 3
2.2 Pinout................................................................................................................. 4
3 Operating the Booster Pack................................................................................................ 5
3.1 Requirements ....................................................................................................... 5
3.2 Launchpad Configuration.......................................................................................... 5
3.3 Hardware Connection .............................................................................................. 6
4 Brushed Motor Demo Application.......................................................................................... 7
4.1 Introduction .......................................................................................................... 7
4.2 Setting up the BOOST-DRV8848 Firmware..................................................................... 7
4.3 Setting up the BOOST-DRV8848 GUI.......................................................................... 10
4.4 Spinning the Brushed Motor ..................................................................................... 11
5 Hardware Files (Schematic/Gerber) ..................................................................................... 14
List of Figures
1 BOOST-DRV8848 ........................................................................................................... 2
2 BOOST-DRV8848 on Top MSP430G2 LaunchPad..................................................................... 2
3 DRV8848 Solution Size..................................................................................................... 3
4 BOOST-DRV8848 Pinout................................................................................................... 4
5 MSP-EXP430G2 Jumper Location ........................................................................................ 5
6 Target Configuration......................................................................................................... 7
7 Target Configuration Setup................................................................................................. 8
8 Launch Selected Configuration ............................................................................................ 8
9 Connect Target Selection................................................................................................... 9
10 Load Program Selection .................................................................................................... 9
11 Load Program Complete.................................................................................................... 9
12 Existing CCS Eclipse Projects............................................................................................ 10
13 BOOST-DRV8848 GUI .................................................................................................... 11
14 GUI (Normal Mode) ........................................................................................................ 12
15 GUI (Parallel Mode)........................................................................................................ 13
16 Parallel Mode Operation................................................................................................... 14
BoosterPack, LaunchPad, Code Composer Studio are trademarks of Texas Instruments.
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Hardware Views www.ti.com
1 Hardware Views
Figure 1 illustrates the BOOST-DRV8848 and Figure 2 pictures the BOOST-DRV8848 connected to the
MSP430G2 LaunchPad™.
Figure 1. BOOST-DRV8848
Figure 2. BOOST-DRV8848 on Top MSP430G2 LaunchPad
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www.ti.com Introduction to the BOOST-DRV8848
2 Introduction to the BOOST-DRV8848
The BOOST-DRV8848 is a dual brushed DC motor BoosterPack based on the DRV8848 dual H-bridge
motor driver. This BoosterPack provides a fully-protected, brushed DC motor drive stage in order to
evaluate your motor application.
2.1 Features
• Complete dual brushed DC motor drive stage in a small form factor (1.75 in x 2.0 in)
• High output current per H-bridge
– 2-A peak
– 1-A RMS
• Parallel mode available for higher current
• Wide power supply voltage range 4.0 V – 18.0 V
• Fully-protected drive stage including overcurrent, short-circuit, over-temperature, and undervoltage with
reporting through the nFAULT pin
• Highlights the compactness of the DRV8848 solution
• Combine with TI LaunchPad kits to create a complete brushed DC motor drive and control platform
• Optimized for the MSP-EXP430G2 LaunchPad with a user-friendly application to get the motor
spinning in minutes
Figure 3. DRV8848 Solution Size
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Introduction to the BOOST-DRV8848 www.ti.com
2.2 Pinout
The LaunchPad interfaces to the BoosterPack over the LaunchPad headers (J1 and J2). Figure 4 gives an
overview of the various control and feedback signals.
Figure 4. BOOST-DRV8848 Pinout
• Powered by an external power supply (4 V–18 V) that is connected to the terminal block header (J5)
• 4-pin terminal block header (J6) for connecting two brushed DC motors
• Parallel mode jumper in order to supply 2x current to a single brushed DC motor
• Fault reporting through the nFAULT signal and LED
• Onboard potentiometer for setting the current limit voltage (VREF)
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www.ti.com Operating the Booster Pack
3 Operating the Booster Pack
3.1 Requirements
The dual brushed DC motor BoosterPack is not a standalone evaluation board and requires a compatible
LaunchPad kit to provide the appropriate control signals. In addition to the dual brushed DC motor
BoosterPack and a compatible LaunchPad, you will require one/two brushed DC motors and sufficient
power supply.
3.2 Launchpad Configuration
For the MSP-EXP430G2 LaunchPad, keep the P1.0 (LED1) and P1.6 (LED2) jumpers for correct
operation of the Status indication of the BoosterPack firmware. Align the TXD and RXD jumpers
horizontally for operation of the hardware UART with the software application.
Figure 5. MSP-EXP430G2 Jumper Location
For other LaunchPads, ensure that the appropriate jumpers are configured on pins that the BOOST-
DRV8848 BoosterPack utilizes.
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Operating the Booster Pack www.ti.com
3.3 Hardware Connection
1. Plug the dual brushed DC motor BoosterPack onto the LaunchPad as shown in Figure 2. The
MSP430G2 LaunchPad will dock with the outer row of the 20-pin headers. The inner row is provided to
maintain compatibility with 40-pin LaunchPads. Orient the terminal block headers towards the USB
connector.
2. Connect the brushed motors to the terminal block header J6.
3. Connect the power supply that will power the brushed motor BoosterPack’s DRV8848 to the terminal
block header J5. The connections have been labeled VM and GND. For full performance, ensure as
much current as your motor may demand is supplied. The brushed motor BoosterPack has a designed
operating range from 4.0–18 V, up to 1-A RMS/2 A peak for each H-Bridge.
4. Enable the power supply.
5. Enable the controller and spin the motor! The BOOST-DRV8848 dual brushed DC motor BoosterPack,
combined with a TI LaunchPad, will provide a complete brushed DC motor evaluation platform. With
the MSP-EXP430G2 LaunchPad and a MSP430G2553, you can take full advantage of TI's pre-written
brushed motor control application (see Section 4 for additional details).
NOTE: At high currents the drive stage can increase to high temperatures.
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www.ti.com Brushed Motor Demo Application
4 Brushed Motor Demo Application
4.1 Introduction
As previously mentioned, the BOOST-DRV8848 dual brushed DC motor BoosterPack has been optimized
to work together with the MSP430G2 Launchpad to provide a complete brushed motor evaluation
platform. With the demo application provided, the brushed motor can be up and spinning in minutes. To
get started with TI's pre-written brushed control application, follow the steps outlined in the next
section.
4.2 Setting up the BOOST-DRV8848 Firmware
1. Load the BOOST-DRV8848 brushed motor control application onto the MSP430G2553 by first
downloading the latest version of Code Composer Studio™ (CCS). This application was developed in
CCS v6.0.0. http://processors.wiki.ti.com/index.php/Download_CCS.
2. Obtain the BOOST-DRV8848 firmware and GUI, by downloading the BOOST-DRV8848 Hardware and
Software Files from the tool folder, www.ti.com/tool/boost-drv8848. This zip folder contains the
complete hardware design files, including the Altium source files, Gerbers, BOM, and schematic, as
well as the Brushed DC Motor Demo firmware and GUI.
3. Flash the MSP430G2553 on the MSP430G2 LaunchPad with the firmware provided. The MSP430G2
LaunchPad, an MSP430G2553, and mini-USB cable are required. The flash can be done in one of the
following two ways:
4. Method 1: Loading the binary .out file (preferred)
• Open Code Composer Studio.
• Select View -> Target Configuration (Figure 6)
• Right click on the User Defined folder and select New Target Configuration (Figure 6)
• Give the Target Configuration a name and select Finish
Figure 6. Target Configuration
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• Set up the Target Configuration as shown in Figure 7. Save the Target Configuration file.
Figure 7. Target Configuration Setup
• Go back to View -> Target Configurations
• Right click the newly-created Target Configuration file and select Launch Selected Configuration
(see Figure 8)
Figure 8. Launch Selected Configuration
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www.ti.com Brushed Motor Demo Application
• In the Debug Menu, right click on the TI MSP430 USB1_0 connection and select Connect Target
(see Figure 9)
Figure 9. Connect Target Selection
• After the device connects, go to Run -> Load -> Load Program (see Figure 10). Browse to the
BOOST-DRV8848 Hardware and Software Files folder that was downloaded from the tool folder.
Go into the Application subdirectory and then go into the GUI subdirectory. Select the
appProgram.out file (Application\BOOST-DRV8848_GUIvX.X\appProgram.out).
Figure 10. Load Program Selection
• After a short delay, the appProgram.out file is loaded onto the MSP430G2553 (see Figure 11). An
error message may display saying that the source was not found. Receiving this message is OK,
as long as the binary was loaded.
Figure 11. Load Program Complete
• Close CCS
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5. Method 2: Flashing the project through CCS debugger
• Open Code Composer Studio
•Go to File -> Import
• Select Existing CCS Eclipse Projects under the Code Composer Studio tab
Figure 12. Existing CCS Eclipse Projects
• Check the Copy projects into workspace option and then browse to the BOOST-
DRV8848_FIRMWAREvX.X directory located with the Application folder within the BOOS-
DRV8848 Hardware and Software Files folder. The project should now show up in the
Discovered Projects section. Ensure that it is checked and select Finish.
• Select the BOOST-DRV8848_FIRMWAREv1.0 project in the Project Explorer and click the
Debug icon.
• CCS now builds the project and loads it onto the MSP430G2533.
• Update the binary file that the GUI is referencing (since CCS has recompiled it). Replace the
appProgram.out file (Application\BOOST-DRV8848_GUIvX.X\appProgram.out) with the BOOST-
DRV8848_FIRMWAREvX.X.out file (Application\BOOST-
DRV8848_FIRMWAREvX.X\Debug\BOOST-DRV8848_FIRMWAREvX.X.out). Delete the old
“appProgram.out” and rename the new file to “appProgram.out
• Close CCS
4.3 Setting up the BOOST-DRV8848 GUI
1. To the run the BOOST-DRV8848 GUI, first download the latest version of the GUI Composer Runtime.
Register for a TI account if you don’t already have one. Select the appropriate version for your
operating system and follow the installation instructions.
http://processors.wiki.ti.com/index.php/Category:GUI_Composer#GUI_Composer_Downloads
2. After installing the GUI Composer Runtime, copy the BOOST-DRV8848_GUIvX.X folder, located in the
Application directory of the BOOST-DRV8848 Hardware and Software Files folder and paste this folder
into the GUI Composer webapps folder located in the “C:\ti\guicomposer\webapps\” directory.
If a non-default installation directory was selected in Step 1, the top-level directory may differ.
3. To run the GUI, double click the BOOST-DRV8848_GUIvX.X.exe file within the BOOST-
DRV8848_GUIvX.X folder of the webapps directory. A shortcut to this .exe can be created in order to
start it from other file locations.
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