Texas Instruments BOOST-DRV8711 User manual

User's Guide
SLVU967–May 2014
BOOST-DRV8711
This document is provided with the BOOST-DRV8711 Stepper Motor BoosterPack as a supplement to the
DRV8711 datasheet (SLVSC40) and CSD88537ND datasheet (SLPS455) to detail the hardware setup
and operation of the BoosterPack.
Contents
1 BOOST-DRV8711 Views ................................................................................................... 2
2 Introduction to the BOOST-DRV8711..................................................................................... 3
2.1 Features.............................................................................................................. 3
2.2 Pinout................................................................................................................. 3
3 Getting Started............................................................................................................... 4
3.1 Requirements ....................................................................................................... 4
3.2 Configuring the LaunchPad ....................................................................................... 4
3.3 Connecting the Hardware.......................................................................................... 5
4 Stepper Motor Demo Application .......................................................................................... 6
4.1 Introduction .......................................................................................................... 6
4.2 Setting up the BOOST-DRV8711 Firmware..................................................................... 6
4.3 Setting up the BOOST-DRV8711 GUI........................................................................... 9
4.4 Spinning Your Stepper Motor.................................................................................... 10
5 Hardware Files (Schematic/Gerber) ..................................................................................... 12
List of Figures
1 BOOST-DRV8711 Stand-Alone............................................................................................ 2
2 BOOST-DRV8711 on MSP-EXP430G2 .................................................................................. 2
3 BOOST-DRV8711 Pinout................................................................................................... 3
4 MSP-EXP430G2 Jumper Location ........................................................................................ 4
5 Target Configuration ........................................................................................................ 6
6 Target Configuration Setup................................................................................................. 7
7 Launch Selected Configuration ............................................................................................ 7
8 Connect Target Selection................................................................................................... 8
9 Load Program Selection .................................................................................................... 8
10 Existing CCS Eclipse Projects ............................................................................................. 9
11 BOOST-DRV8711 GUI Screen........................................................................................... 10
12 BOOST-DRV8711 GUI CONTROL Tab................................................................................. 11
13 BOOST-DRV8711 GUI REGISTERS Tab .............................................................................. 12
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BOOST-DRV8711 Views www.ti.com
1 BOOST-DRV8711 Views
The views in Figure 1 and Figure 2 are of the BOOST-DRV8711 Stepper Motor BoosterPack.
Figure 1. BOOST-DRV8711 Stand-Alone
Figure 2. BOOST-DRV8711 on MSP-EXP430G2
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www.ti.com Introduction to the BOOST-DRV8711
2 Introduction to the BOOST-DRV8711
The BOOST-DRV8711 is a stepper motor BoosterPack based on the DRV8711 Stepper Motor Controller
and CSD88537ND Dual 60-V N-Channel NexFET™ Power MOSFETs. This BoosterPack provides a
complete stepper motor drive stage in order to evaluate your motor applications.
2.1 Features
• Complete stepper motor drive stage in a small form factor (1.75 in × 2.00 in)
• Supports 8.2–52 V and up to 4.5 A continuous for each H-Bridge
• 4x CSD88537ND Dual 60-V N-Channel NexFET Power MOSFETs (12.5 mΩ)
• Motor stall and device fault LED indicators
• Fully protected drive stage including overcurrent, overtemperature, undervoltage, and motor stall detect
• Combine with TI LaunchPad kits to create a complete stepper motor drive and control platform
• Optimized for the MSP-EXP430G2 LaunchPad with a user-friendly application to get your motor
spinning in minutes
2.2 Pinout
The BOOST-DRV8711 brings out a mixture of power, control, and feedback signals to the LaunchPad
headers.
Figure 3. BOOST-DRV8711 Pinout
• Powered by an external power supply (8.2–52 V) that can be connected to the terminal block header
(J6)
• 4-pin terminal block header (J5) for connecting a bipolar stepper motor
• Fault and motor status reporting through the nFAULT and nSTALL signals
• SPI interface to set device configuration, operating parameters, and read out diagnostic information
• Built-in microstepping indexer through a STEP/DIR interface or H-Bridge control through an IN/IN
interface
• Onboard potentiometer for creating your own, easy-to-use, demo application
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Getting Started www.ti.com
3 Getting Started
3.1 Requirements
The Stepper Motor BoosterPack is not a standalone evaluation board and requires a compatible
LaunchPad kit to provide the appropriate control signals. In addition to the Stepper Motor BoosterPack
and a compatible LaunchPad, a stepper motor and sufficient power supply are required.
3.2 Configuring the LaunchPad
3.2.1 Example Using MSP-EXP430G2
For the MSP-EXP430G2 LaunchPad, remove the P1.0 and P1.6 (LED1 and LED2) jumpers for correct
operation of the POT and SDO signals of the BoosterPack. The TXD and RXD jumpers should be aligned
horizontally (black rectangles in Figure 4) for operation of the hardware UART with a software application.
Figure 4. MSP-EXP430G2 Jumper Location
For other LaunchPads, ensure that the appropriate jumpers are configured on pins that the BOOST-
DRV8711 BoosterPack utilizes.
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3.3 Connecting the Hardware
1. Plug the Stepper Motor BoosterPack onto the LaunchPad as shown in Figure 2.The terminal block
headers should be oriented towards the USB connector.
2. Connect your stepper motor to the terminal block header J5. The motor should have two windings,
each with a + and a – termination. Connect one winding to A1/A2 and the other to B1/B2 (polarity does
not matter). For questions on the motor wire coloring coding, please see the motor’s datasheet.
3. Connect the power supply that will power the Stepper Motor BoosterPack’s DRV8711 and Drive Stage
to the terminal block header J6. The connections have been labeled VM and GND. For full
performance, ensure you can supply as much current as your motor may demand. The Stepper Motor
BoosterPack has a designed operating range from 8.2–52 V up to 4.5 A continuous for each H-Bridge.
WARNING
At high currents the drive stage can increase to high temperatures
4. Enable the power supply
5. Enable your controller and spin the motor. The BOOST-DRV8711 Stepper Motor BoosterPack
combined with a TI LaunchPad provides a complete stepper motor evaluation platform. With the MSP-
EXP430G2 LaunchPad and a MSP430G2553 you can take full advantage of TI's pre-written stepper
motor control application (see Section 4 for additional details).
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4 Stepper Motor Demo Application
4.1 Introduction
As mentioned earlier, the BOOSTXL-DRV8301 Motor Drive BoosterPack has been optimized to work
together with the MSP430G2 Launchpad, MSP-EXP430G2, and MSP430G2553 to provide a complete
stepper motor evaluation platform. With the demo application provided, you can have your stepper motor
up and spinning in minutes. Get started with TI's pre-written stepper control application by following
the steps outlined in Section 4.2 through Section 4.4.
4.2 Setting up the BOOST-DRV8711 Firmware
1. Download the latest version of Code Composer Studio to load the BOOST-DRV8711 stepper motor
control application onto the MSP430G2553. The application was developed in CCS v5.5.0.
http://processors.wiki.ti.com/index.php/Download_CCS
2. To obtain the BOOST-DRV8711 firmware and GUI, download the BOOST-DRV8711 Hardware and
Software Files from the tool folder, http://www.ti.com/tool/boost-drv8711. This zip folder contains the
complete hardware design files, including the Altium source files, Gerbers, BOM, schematic, as well as
the Stepper Motor Demo firmware and GUI.
3. Flash the MSP430G2553 on the MSP430G2 LaunchPad with the firmware provided. This will require
the MSP430G2 LaunchPad, a MSP430G2553, Mini USB cable, and can be done in one of two ways
which are outlined in Step 4 and Step 5.
4. Method 1: Loading the binary .out file
• Open Code Composer Studio.
• Select View →Target Configuration (Figure 5, left side of image)
• Right click on the User Defined folder and select New Target Configuration (Figure 5, right side
of image)
Figure 5. Target Configuration
• Give the Target Configuration a name and select Finish
•Figure 6 illustrates how the Target Configuration should be set up. Save the Target Configuration
file.
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Figure 6. Target Configuration Setup
• Go back to View →Target Configurations
• Right click your newly created Target Configuration file and select Launch Selected
Configuration (Figure 7)
Figure 7. Launch Selected Configuration
• In the Debug Menu, right click on the TI MSP430 USB1_0 connection and select Connect Target
(Figure 8)
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Figure 8. Connect Target Selection
• After the device connects, go to Run →Load →Load Program (Figure 9). Browse to the
BOOST-DRV8711 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-DRV8711_GUIvX.X\appProgram.out).
Figure 9. Load Program Selection
• After a short delay, the appProgram.out file is loaded onto the MSP430G2553
• Close CCS
5. Method 2: Flashing the project through CCS debugger
• Open Code Composer Studio
• Go to File →Import
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www.ti.com Stepper Motor Demo Application
• Select Existing CCS Eclipse Projects under the Code Composer Studio tab (Figure 10)
Figure 10. Existing CCS Eclipse Projects
• Check the Copy projects into workspace option and then browse to the BOOST-
DRV8711_FIRMWAREvX.X directory located with the Application folder within the BOOST-
DRV8711 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-DRV8711_FIRMWAREv1.0 project in the Project Explorer and click the Debug
icon
• CCS will now build the project and load it onto the MSP430G2533
• Close CCS
4.3 Setting up the BOOST-DRV8711 GUI
1. Download the latest version of the GUI Composer Runtime to initially run the BOOST-DRV8711 GUI.
You must register for a TI account if you don’t already have one. Select the appropriate version for
your operating system and follow the install instructions.
http://processors.wiki.ti.com/index.php/Category:GUI_Composer#GUI_Composer_Downloads
2. After installing the GUI Composer Runtime, copy the BOOST-DRV8711_GUIvX.X folder, located in the
Application directory of the BOOST-DRV8711 Hardware and Software Files folder and paste this folder
into the GUI Composer webapps folder located in the C:\ti\guicomposer\webapps\ directory.
(Note: if you chose a non-default installation directory in Step 1, the top-level directory may differ)
3. To run the GUI, double click the BOOST-DRV8711_GUIvX.X.exe file within the BOOST-
DRV8711_GUIvX.X folder of the webapps directory. You can make a shortcut to this .exe in order to
start it from other file locations.
**Ensure that the GUI “exe” is exactly two levels below the GUI Composer “webapps” folder. The GUI will
not start if this is incorrect. The path should look similar to this
C:\ti\guicomposer\webapps\BOOST-DRV8711_GUIvX.X\BOOST-DRV8711_GUIvX.X.exe.
(Note: if you chose a non-default installation directory in Step 1, the top-level directory may differ)
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4.4 Spinning Your Stepper Motor
After a successful launch of the BOOST-DRV8711_GUIvX.X.exe,Figure 11 pops up. It may take a small
period of time before the GUI connects and the GUI Widgets populate (red X's appear on the widgets
while the GUI is connecting). If the GUI does not load after a few minutes (the X’s disappear), a
connection issue may have occurred and TI recommends restarting the application.
Figure 11. BOOST-DRV8711 GUI Screen
4.4.1 Quick Start
1. Set Your Full Scale Current level appropriately by adjusting the TORQUE and ISGAIN settings. Your
Full Scale Current level is determined by your stepper motor’s current rating and power supply
capability. Click the Set All button after choosing the appropriate settings.
2. Select your Step Mode. This determines the level of microstepping applied to the motor.
3. Set the nSLEEP pin high to bring the DRV8711 out of sleep mode. The DRV8711 now begins
regulating current.
4. Adjust the Stepper Motion Profile parameters to the desired values. The units are Pulses Per
Second, otherwise known as Steps Per Second.
5. Enable the Speed Profile or Step # Profile button depending on the desired mode.
The BOOST-DRV8711 GUI provides two tabs. The first tab controls the Stepper Motor and the second tab
sets the registers of the DRV8711.
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