Getting Started with bVT100 Displays
bVT100 describes a hardware interface and a software protocol. It is very simple to use, simply connect a suitable serial device and input data. If the device is a display then text will be displayed to reflect the data entry.
The BV4511 connected to a 128x64 display
Before going any further see this article which shows how to connect the device and set up BV-COMM properly.
From here it is assumed that you have a working BV-COMM and device so that anything typed in will be appearing on the display.
Running Scripts - Using BV-COM
Running a script is simply a matter of sending text the the display, using BV-COMM make sure that the text transfer settings are as follows:
NOTE that this is a straight forward text transfer with no protocol endings or automation.
Here is a collection of scripts. Copy and paste the text including the funny characters (escape) into Notepad, save and then transfer to the display.
| Large 128x64, BV4511 |
Draws a box using the box command |
|
Example of fonts, reverse and horizontal alignment. |
|
Example of boxes lines and circles |
|
This will write to the EEPOM and change the sign-on message |
Running Scripts Using Scom
Scripts can also be run using scom, this gives the opportunity for automated actions from a PC, at start up for example or use the scheduling function provided on the PC. Scom is available in the downloads section and a description of how it works is provided in the scom article.
To run a script using scom very little changes are required:
# scom version3 of test1
# There is no need for the //./COM if the port is less than 5
!open //./COM405 115200 1 # open com port with h/s
[2J
[1;2H(2VT100 Display
(1
[2;0HNormal Text
[3;0H[0fRevese Text
[1f
{40;10pAlign
{48;11pAlign
{56;12pAlign
!console 1
The above is the same as the fonts script for the BV4511 but will now work when used as an scom script. A slight advantage is that comments can be freely used provided that they are prefixed with #.