Related Manuals for Texas Instruments DRV8811EVM
Summary of Contents for Texas Instruments DRV8811EVM
- Page 1 DRV8811EVM User's Guide Literature Number: SLVA344A July 2009 – Revised September 2009...
- Page 2 SLVA344A – July 2009 – Revised September 2009 Submit Documentation Feedback...
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Page 3: Table Of Contents
Contents ......................... Introduction ......................Block Diagram ......................Power Connectors ........................ Test Stakes ........................Jumpers ......................Motor Outputs ..................... Installing Drivers And Software ..................Installing the FTDI USB Driver ........Installing the DRV8811 Evaluation Board Windows Application Software ................Running the Windows Application Software ...................... - Page 4 www.ti.com List of Figures ..................... VREF SELECT Jumper ....................DECAY SELECT Jumper ................DRV8811_RD_EVM_R1p0.exe Main Screen ....................Acknowledgement Text Box ........................ Signals Frame ...................... Curent Control Frame ..................... Current Control Frame ........................Step Rate ...................... Speed Control Frame ......................Step Control Frame List of Figures SLVA344A –...
- Page 5 User's Guide SLVA344A – July 2009 – Revised September 2009 Laser and Motor Drives This document is provided as a supplement to the DRV8811 datasheet. It details the hardware implementation of the DRV8811 customer evaluation module (EVM). SLVA344A – July 2009 – Revised September 2009 Laser and Motor Drives Submit Documentation Feedback...
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Page 6: Introduction
Introduction www.ti.com Introduction The DRV8811_RD customer EVM is the complete solution to evaluating the DRV8811 microstepping bipolar stepper driver. It houses a USB link to provide easy control from a PC computer, an MSP430 microcontroller that interprets serial commands from the PC and generates control signals to the driver device, and the DRV8811 device with access to all signals for a complete evaluation. -
Page 7: Test Stakes
Installing Drivers And Software www.ti.com Test Stakes Every pin on the device has been brought out to a test stake. A label on the silkscreen identifies each signal. Jumpers Three pin jumpers can be configured independently from the other two or three pin jumpers. However, two pin jumpers must either be closed or open. -
Page 8: Installing The Drv8811 Evaluation Board Windows Application Software
Windows Application www.ti.com Installing the DRV8811 Evaluation Board Windows Application Software The included CD contains a folder titled “Windows Application”. It is recommended for the contents of this folder to be copied to any desired folder on the computer. The reason for this is the Settings.ini file will be written upon software exit. -
Page 9: Menu
Windows Application www.ti.com Menu The menu at the top of the application offers a series of quick options for how the COM port is to behave. 1. File Exit - Terminates the application 2. Settings Port - Selects from COM1 to COM4. Default is COM4. The serial port's actual port number defaults to what we have specified on “USB_Drivers_Install_Readme.pdf”. -
Page 10: Updating Dac Output For Current Control (Vref/Decay)
Windows Application www.ti.com A checked checkbox translates to a HI level on the respective control signal. A un-checked checkbox translates to a LO level on the respective control signal. Updating DAC Output for Current Control (VREF/DECAY) If the DRV8811 EVM has been configured to accept VREF analog voltages through the MSP430 microcontroller interface (JP1 is set to INT), then the slider bar on the Current Control frame can be used to set the VREF voltage. -
Page 11: Step Rate
Windows Application www.ti.com The DRV8811_RD customer EVM allows for the possibility of coordinating step rates such that accelerating and decelerating profiles are achieved. Both acceleration and deceleration are controlled by the same parameters, acceleration rate and time base. When the motor starts, it always starts at the slowed pulses per second (PPS) speed (62 pulses per second). -
Page 12: Schematic
Schematic www.ti.com Pressing the Start Steps button, will start the timer and pulses will be generated at the rate specified by the decimal number at the PPS text box. Once the Start Steps button is pressed it becomes the Stepping button. -
Page 13: Important Notice
IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.