User's Guide
SLVU967A – May 2014 – Revised June 2019
BOOST-DRV8711
This document is provided with the BOOST-DRV8711 Stepper Motor BoosterPack as a supplement to the
DRV8711 datasheet and CSD88537ND datasheet to detail the hardware setup and operation of the
BoosterPack.
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Contents
BOOST-DRV8711 Views ................................................................................................... 2
Introduction to the BOOST-DRV8711 ..................................................................................... 3
2.1
Features .............................................................................................................. 3
2.2
Pinout ................................................................................................................. 3
Getting Started ............................................................................................................... 4
3.1
Requirements ....................................................................................................... 4
3.2
Configuring the LaunchPad ....................................................................................... 4
3.3
Connecting the Hardware.......................................................................................... 7
Stepper Motor Demo Application .......................................................................................... 8
4.1
Introduction .......................................................................................................... 8
4.2
Setting up the BOOST-DRV8711 Firmware ..................................................................... 8
4.3
Setting up the BOOST-DRV8711 GUI.......................................................................... 11
4.4
Spinning Your Stepper Motor .................................................................................... 12
Hardware Files (Schematic/Gerber) ..................................................................................... 14
1
BOOST-DRV8711 Stand-Alone............................................................................................ 2
2
BOOST-DRV8711 on MSP-EXP430G2
3
BOOST-DRV8711 Pinout ................................................................................................... 3
4
MSP-EXP430G2 Jumper Location ........................................................................................ 5
5
Target Configuration
6
Target Configuration Setup ................................................................................................. 9
7
Launch Selected Configuration ............................................................................................ 9
8
Connect Target Selection ................................................................................................. 10
9
Load Program Selection ................................................................................................... 10
10
Existing CCS Eclipse Projects ............................................................................................ 11
11
BOOST-DRV8711 GUI Screen ........................................................................................... 12
12
BOOST-DRV8711 GUI CONTROL Tab................................................................................. 13
13
BOOST-DRV8711 GUI REGISTERS Tab .............................................................................. 14
1
2
3
4
List of Figures
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1
BOOST-DRV8711 Views
1
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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
2
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Introduction to the BOOST-DRV8711
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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
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2.2
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
Pinout
The BOOST-DRV8711 brings out a mixture of power, control, and feedback signals to the LaunchPad
headers.
Figure 3. BOOST-DRV8711 Pinout
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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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3
Getting Started
3
Getting Started
3.1
Requirements
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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
3.2.1
Configuring the LaunchPad
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 (yellow arrows in Figure 4) for operation of the hardware UART with a software application.
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Getting Started
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Figure 4. MSP-EXP430G2 Jumper Location
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Getting Started
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For other LaunchPads, ensure that the appropriate jumpers are configured on pins that the BOOSTDRV8711 BoosterPack utilizes.
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Getting Started
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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 MSPEXP430G2 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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Stepper Motor Demo Application
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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. 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
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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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Stepper Motor Demo Application
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Figure 6. Target Configuration Setup
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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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Stepper Motor Demo Application
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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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Stepper Motor Demo Application
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•
Select Existing CCS Eclipse Projects under the Code Composer Studio tab (Figure 10)
Figure 10. Existing CCS Eclipse Projects
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4.3
Check the Copy projects into workspace option and then browse to the BOOSTDRV8711_FIRMWAREvX.X directory located with the Application folder within the BOOSTDRV8711 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
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 BOOSTDRV8711_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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Stepper Motor Demo Application
4.4
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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
1.
2.
3.
4.
5.
Quick Start
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.
Select your Step Mode. This determines the level of microstepping applied to the motor.
Set the nSLEEP pin high to bring the DRV8711 out of sleep mode. The DRV8711 now begins
regulating current.
Adjust the Stepper Motion Profile parameters to the desired values. The units are Pulses Per
Second, otherwise known as Steps Per Second.
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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4.4.2
CONTROL Tab Walkthrough
Figure 12. BOOST-DRV8711 GUI CONTROL Tab
1. The nSLEEP and RESET buttons directly control the nSLEEP and RESET pins of the DRV8711. Red
indicates LOW (0 V) and green indicates HIGH (3.3 V). nSLEEP = LOW puts the DRV8711 in a low
power sleep mode. RESET = HIGH resets the internal logic and disable the H-bridge outputs.
2. The STEP and DIR buttons give you command of the stepper motor. STEP moves the motor one step,
independent of the Stepper Motion Profile. DIR selects which direction the motor is spinning.
3. The Stepper Motion Profile provides a method to spin the stepper motor in a variety of ways. It gives
you command of the starting/stopping speed, acceleration rate, target speed, and number of steps (if
using the step # profile). The units are pulses per second, or steps per second, as the DRV8711 will
move a step with every rising edge it sees.
4. The Speed Profile button (once selected) accelerates the stepper motor from the starting speed to the
target speed. The motor remains at this speed until the Speed Profile button is selected again. The
Step # Profile (once selected) moves the stepper motor the specified number of steps while attempting
to maintain the speed profile. Due to approximation errors on the MCU, the target speed may not
exactly match the target speed.
5. The nFAULT and nSTALL provide status about the motor and motor driver. The nFAULT reports on a
variety of faults for the DRV8711. A more detailed description of the various faults can be found in the
datasheet. nSTALL is a feature of the DRV8711 to detect a motor stall. This feature must be calibrated
to function properly. Please see the datasheet for additional information.
6. The Current Speed box provides information about the current speed of the speed motor. The Motor
State box indicate the status of the motor, whether it is stopped, accelerating, decelerating, and so
forth. Note that there is a slight time delay in the GUI (~ 1 second).
7. The Step Mode setting determines the microstepping level of the DRV8711. The Decay Mode
determines the decay method of the current regulation scheme. The recommended modes for stepper
motors are All Mixed and Auto Mixed Decay. The decay method is fine tuned in the Registers tab.
8. The TORQUE and ISGAIN settings, in combination with the hardware SENSE resistor, determine the
full scale current of the current regulation scheme. By adjusting these settings you can adjust the full
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scale current level appropriately for your specific motor. Refer to the datasheet for the exact formula for
full scale current.
9. The Set All button takes the settings in the GUI and writes them to the DRV8711. Click this button to
update the DRV8711 once you have made the desired settings.
4.4.3
REGISTERS Tab Walkthrough
Figure 13. BOOST-DRV8711 GUI REGISTERS Tab
1. The BOOST-DRV8711 GUI provides access to all of the register settings of the DRV8711. Use this
page to fine tune the motor driver settings. The register name as well as its hexadecimal address is
shown. Refer to the DRV8711 datasheet for a more detailed description of each setting.
2. The Reset Faults button resets any faults that have occurred while driving your stepper motor. If a fault
occurs while spinning your motor (FAULT LED lights ups), select this button to clear the fault. Selecting
the button only clears the fault if the fault condition has been removed. Please refer to the DRV8711
datasheet for a detailed description of possible fault conditions.
3. The Manual SPI Read/Write section allows you to manually read or write hexadecimal values to the
DRV8711.
4. The Write All button updates the DRV8711 with the values set in the GUI. The Read All button updates
the GUI with the values from the DRV8711.
5
Hardware Files (Schematic/Gerber)
The complete design files are found in the tool folder (http://www.ti.com/tool/boost-drv8711) including the
schematic, Gerbers, layout files, PCB views, and bill of materials.
14
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