Stellaris® Stepper Motor RDK User’s Manual
November 4, 2009 15
Graphical User Interface
The stepper motor RDK board can be controlled from a graphical user interface (GUI) program
running on a PC. Using the GUI provides much greater control of the motor than the on-board
interface. Use the GUI to set specific values for position, speed, acceleration, and deceleration, as
well as a number of other parameters to tune the operation of the motor. The GUI program
communicates with the RDK board using a virtual serial port over a USB cable.
Upon starting the GUI program, the on-board interface on the RDK board is disabled, and the knob
and button have no effect.
If the program has not been used before, then a dialog box appears that lets the user select the
COM port to use. Once a COM port is selected, the program remembers the selection and does
not ask again. However, at any time the user can re-open the COM port dialog box by
double-clicking on the COM port indicator on the main panel.
The stepper motor operation is controlled from the main window (see Figure 2-2). The main
window provides user controls for controlling the motor, as well as several indicators to provide
status of the motor operation. Most parameters can only be modified when the motor is stopped,
and are not selectable while the motor is running. Table 2-1 describes the controls in detail.
Figure 2-2. Stepper Main GUI Window
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