You didn't show how "DISPLAY" was opened/set.
Try setting binmode (binmode DISPLAY;). This should be used whenever non-ascii output is used.

Also try disabling output buffering on DISPLAY so all text is flushed after each print.

One more thing to try, change the lcd open to: open(LCD,">-")||die "ERROR: can not write to /dev/lcd\n"; This will cause the LDC output to go to stdout. Run the test script capturing the output: lcdtest.pl > lcd.out Then, dump the output in hex: od -h lcd.out # hex only od -hc lc...

Also check the tty settings (stty -a < /dev/lcd, I think) after the c++ application has run. The character size may be set to cs7. This would cause any character above x7F to be sent incorrectly.

You might have a problem with flow control if you designated the LCD tty device as the console. A better solution would be to write a kernel mod (easier than it sounds) to intercept the console output as pass it to the LCD device.

From the 'sure would be nice' list I would like to see a 'dump mode' on the LCD's. When activated the LCD would just display (in hex) the data it receives without any kind of formatting. That would eliminate a lot of problems with what I think I am sending vs what I am really sending. Future feature...

Ex2 under MO's programming examples might be a good place to start. I wrote this to test my LCD. Are you wanting to use a keypad (somewhat limited) or the console keyboard? Or both??? Do you only need basic screen formatting such as FF, NL, CR controls or full formatting that allows such things as f...

If I had looked a little closer at your post I would have seen that you have the same LCD that I have. I have buffer overrun problems at the standard 19.2 bps rate. Try putting a short delay after moving the cursor to the next line. Also put a longer delay after the display clear. I just had to expe...

You seemed to have answered your own question and your test support this. You are having buffer overflow problems. Solutions: 1. If you don't want to throttle you application, run at a very low bps rate. 2. Place waits after sending a reasonable number of characters (less than the buffer size). It i...

On your contacts web page you have a '-' in 'martix-orbital', I had to remove the dash to get the email to work.

1. Go to the phpbb admin page and select "Set header/meta/footer" 2. Place your html code in the header box, example: <a href="http://Matrixorbital.com">Return Home</a> 3. This will appear at the top of each page and provide a return to your web site. <font size=-1>[ This Message...

funny??? Did you mean functional. Unfortunately the picture does not show the duct tape inside the display box. This is a class act!

Hey!!!! What about our links?

I put an on/off switch on my GLK24064 with no ill effects. You may have a problem on power up with applications that don't refresh the entire display when the display is updated. States may be out of sync (e.g. backlight on/off).

Curt

If text cursor positioning is used the software may be assuming the first row is zero. I believe it is actually 1 (the manual is not very clear on this). This error could generate the results you are seeing.

A link to the forum from your home page/site map would be nice too. I assume that Oct 4 forum up announcement will eventually go away.