BV4512 Quick Start
Using the BV4512 with the BV4221
Please note that this may be referred to as the BV4219, the part has now been renamed the BV4512
The BV4221 is a USB to I2C convertor and conveniently plugs directly into the BV4291.
The BV4221 is easily capable of powering the BV4512 and should, as soon as connected display the sign on screen which is a single line at the top of the display. The LED back light should also be on.
It is assumed that you have the terminal working and also the BV4221, if not see the video's in the 'using BV4221' section. At this point you should have a screen that looks something like this:
The first thing to do is check the display is working:
s 55 r g-3
This should return three bytes of values 1,2 and 3. Next clear the display:
s 5 p
Send some text say 'E','F','G'
s s 20 45 46 47 p
And lastly draw a horizontal line starting at 10,10 for a length of 30:
s 12 10 10 30 p
Note that these are in hex so the actual decimal co-ordinates and distance is 16,15 for the coordinates and 48 for the length.
This is a screenshot of the above commands and below is what the display will look like.
The picture of the 'hands' is just a reflection of the photographer. Obviously this is a yellow/green screen so the colour may be different.
Next Steps
The BV4221 is designed to be controlled form a COM port and so any programming language that supports this will be suitable for automating the process. This includes, VB & VB Script that can be run from a browser. There are resources for this on this site and also www.byvac.com.