User manual

Commissioning

2.1. USB

When plugging a USB cable using the micro USB port X3, the device is enumerated as

USB CDC device. Modern operating systems such as Windows 10, MAC OS X or Linux

come with appropriate drivers pre-installed.

After initialisation, a new communication device is added to the system. On Windows this

is called //./COMx where x is a decimal number. Linux and UNIX-like systems in general

use either /dev/ttyACMx or /dev/ttyUSBx as naming scheme.

Simple text output can be done from almost every shell in a similar way.

echo "Hello world !" > //./COM5

Example2.1.Hello world on a Windows shell

2.2. UART

The UART interface is designed to be used in embedded circuits keeping costs as

low as possible. According to this, no RS232-LVTTL level shifters are used. Most

microprocessors/microcontrollers used in such an environment can be connected directly

to the LCD-Term.

Caution

Using the UART as a connection to a common PC requires RS232-LVTTL level

shifters. As an alternative, LVTTL to USB converters such as an FTDI cable or

chip can be used. This solution is already covered by LCD-Term's USB connector.

However, USB driver support can be easier on older OS when using FTDI chips/

cables.

2.3. Configuration

LCD-Term offers a built-in setup dialog for configuration. It can be entered by either short

circuiting GND and PA00 during power-up or by an escape sequence typed into a serial

terminal program. The sequence is ESC[Q. See Table3.4, “Additional functions” for details.

The setup dialog can be attended via a terminal program. You are free to use USB or the

UART connection. Follow the menue to configure backlight, display contrast and IO pins.

Don't forget to save before exiting the setup to make your changes persistent. By delivery,

LCD-Term is configured with reasonable values.

LCD-Term is capable of displaying GIF images from its internal Flash memory. At the

moment this documentation is written, uploading images requires a third party tool from

the manufacturer of the microcontroller that is used. Since we are going to simplify this

procedure in the future, it is not covered here. Please see: http://www.taskit.de/LCD-

Term_en.html