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Document number 296194 Version 2
24
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January 2020
Control, Command Set and Programming Options
Button Control
Slide the ‘battery’ switch from Battery OFF to Battery ON. The four buttons on the base
module can then be used to demonstrate the display, buttons functions as follows:
Button Number Button Function
1
Switch all segments on (drive voltage 2.7V) or off
2
Counter demo – press to initiate to 0000, press/hold to increment
3
Decrease display brightness
4
Increase display brightness
Press and release button 1 and the display will illuminate (all segments) at a low level (2.7V
drive, PWM value of 1). Press and release button 4 to increase brightness (PWM changed) -
9 presses to maximum brightness. Press and release button 3 to decrease brightness (PWM
changed) - 9 presses to minimum brightness.
Ensure display is angled away from eyes
when brightness increased.
Button 2 initiates a displayed counter demonstration. With display on and brightness set
(using button 1, 3 and 4), press and release button 2 to set counter to 0000. Press and
release to increase counter by 1, press and hold to rapidly increase counter to 9999 and
loops to 0000. Pressing button 3 or 4 will increase or decrease brightness (unless at
maximum or minimum brightness respectively) and display all segments, press button 2 to
return to the counter display.
Serial Connection – UART & USB
The driver board can be accessed using a direct UART connection, or via a USB connection.
Do not connect to the UART when USB is active.
To connect via USB, insert the supplied cable’s USB Micro-B plug into the driver board
module USB socket and connect the USB Type-A plug to a suitable PC’s USB socket. The
driver board will instantiate as a serial port, communication should be made to this serial
port using PuTTY or similar command-line – 9600 baud, 8 data bits, 1 stop bit, no parity.
Once a serial connection is established to the driver board, the driver board will respond
with a text line “*******DataVu Driver CLI******” and a prompt “>”.
