Matrix Orbital Corp

So I'm having a problem with turning on autoscroll. Im using the LK 204-24 USB


with it off, if I send the following text

111111111111111111
222222222222222222
333333333333333333
444444444444444444

the next line creates this

555555555555555555
222222222222222222
333333333333333333
444444444444444444

which is what I expect. The problem is when I turn autoscroll on which is supposed to move all the lines up and print on the bottom. What actually happens is the bottom line moves up to the top, and then the new line draws at the bottom.

444444444444444444
222222222222222222
333333333333333333
555555555555555555

instead of

222222222222222222
333333333333333333
444444444444444444
555555555555555555

----------------------------------------------------------------------
My second problem is with vertical graphs. I can only draw them from the center of the display up. My graphs only draw in rows 1 and 2.

I drew a bunch of graphs each time heigher and higher, and this is what I get, nothing ever in rows 3 and 4

Hello yakpimp,

Thank you for your post.
How are you sending the text to the LK 204-24 USB? Are you using your own application? Is it possible for you to please try the same thing using uProject (you can get it here)

In the Alphanumeric tab of uProject, there is a Demo Thin and Demo Thick Bar Graph button; I believe that is default to run the demo on a 20x4 display (check the Column and Row). Click on either the Thin or Thick demo and see if this draws on lines 3 and 4.

Please let me know how it turns out.

Raquel wrote:Hello yakpimp,

Please let me know how it turns out.

I'll try that when I get home today.

The way I am doing it now, I am just sending the command in a character array.

[254][WhateverDrawVertGraphIs][Column][height]

using writefile.

Raquel wrote:Hello yakpimp,

Thank you for your post.
How are you sending the text to the LK 204-24 USB? Are you using your own application? Is it possible for you to please try the same thing using uProject (you can get it here)

In the Alphanumeric tab of uProject, there is a Demo Thin and Demo Thick Bar Graph button; I believe that is default to run the demo on a 20x4 display (check the Column and Row). Click on either the Thin or Thick demo and see if this draws on lines 3 and 4.

Please let me know how it turns out.

I did this, and it only draws in rows 1 + 2. alternating bars going up and down.

Hmmm. Can you please ask it for its module type? There should be a button in the Main tab of uProject.

Raquel wrote:Hmmm. Can you please ask it for its module type? There should be a button in the Main tab of uProject.

It opens a small window titled Display Tuner with the text Module recognized as ""

Can you please send the command /254//55/ via the Uploader tab:
In the uploader tab, go to Commands, Add, Raw Data.
This opens up the Add Raw Data window. Click on Add Command Byte. This should add /254/ to the empty Raw Data line. Go to ASCII Number and type in 55. Click on Add. This should add a /55/ to the Raw Data line. Click OK.
Click on Script, Execute, Enter. This will execute the command you created. The module should reply back a 1 byte value. Let me know this value.

Side Note: when you first turn the module on, does it have characters displaying on lines 3 and 4?

It replied with 0x38 which according to my docs say that it is LK204-24-USB

And when I turn the display on, lines 3 and 4 work fine. I can write directly to the lines, and the horizontal bar graphs work fine on those lines.

Hi yakpimp,

It sounds like there is a definite problem unfortunately I can not point it out. I would like to get your module for RMA, can you please send me your email address?

Thanks,

I can't send you PMs the server keeps giving an error to me.

Hi,

Got your email address; our RMA dept will be contacting you shortly.

Thanks,

I haven't heard back from you guys. Where can I check RMA status, it has been quite a while, and I would really like my LCD

I still do not have my a replacemnet unit. What is going on? I bought the unit brnad new, it didn't work correctly, I sent it back. Why was I not shipped a new replacement when you recieved my RMA unit?

This is the worst customer service I have ever recieved!

Sorry for the delay.

Replied via email.

Got the replacement today. Thank you.. Totally sweet!