USB + Serial Backpack Kit with 16x2 RGB backlight negative LCD (item 784) not displaying full ine of text

by darrenw on Mon Feb 11, 2013 6:34 am

I have purchased the USB + Serial Backpack Kit with 16x2 RGB backlight negative LCD (item 784) from Adafruit, followed the assembly and test instructions successfully.

I can successfully connect to it with a Windows machine through USB using RealTerm and LCD Smartie. The issue I have is that it only displays text in the first column, the remaining columns remain blank.

Is there a setting I need to make to have it use all 16 columns to display a line of text?
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Re: USB + Serial Backpack Kit with 16x2 RGB backlight negative LCD (item 784) not displaying full ine of text

by adafruit_support_bill on Mon Feb 11, 2013 7:28 am

Make sure you have the right LCD setting in the LCD Smartie setup.
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Re: USB + Serial Backpack Kit with 16x2 RGB backlight negative LCD (item 784) not displaying full ine of text

by darrenw on Mon Feb 11, 2013 2:44 pm

I have been using the matrix.dll, is that correct?
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Re: USB + Serial Backpack Kit with 16x2 RGB backlight negative LCD (item 784) not displaying full ine of text

by adafruit_support_bill on Tue Feb 12, 2013 8:00 am

Matrix.dll should work. You also need to specify thye correct screen size.
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Re: USB + Serial Backpack Kit with 16x2 RGB backlight negative LCD (item 784) not displaying full ine of text

by darrenw on Wed Feb 13, 2013 5:06 am

Thanks for the response. The size was set to 2 X 16 (there is no option for 16 X 2). I have tried changing most of the settings with no resolution. All other functions appear to work perfectly, such as adjusting the contrast, brightness and turning the backlight on and off. Could it be faulty?
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Re: USB + Serial Backpack Kit with 16x2 RGB backlight negative LCD (item 784) not displaying full ine of text

by adafruit_support_bill on Wed Feb 13, 2013 6:35 am

Sounds like possibly a defective display. Contact support @adafruit.com with a link to this thread and ask for a replacement kit.
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Re: USB + Serial Backpack Kit with 16x2 RGB backlight negative LCD (item 784) not displaying full ine of text

by banjax on Wed Feb 13, 2013 10:26 pm

Defective? It's displaying the whole of the text, but scrolling bottom to top just in the first column.
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Re: USB + Serial Backpack Kit with 16x2 RGB backlight negative LCD (item 784) not displaying full ine of text

by banjax on Thu Feb 14, 2013 12:22 am

I guess I should probably add that when powering on, it displays text on the full screen just fine. I went back over my solder joints, thinking maybe there was a cold solder point, but everything looks good.
Also, I can turn the backlight on and off, but not change the color.
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Re: USB + Serial Backpack Kit with 16x2 RGB backlight negative LCD (item 784) not displaying full ine of text

by darrenw on Thu Feb 14, 2013 2:55 am

Thank you for your assistance, I have made contact using the address provided.
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Re: USB + Serial Backpack Kit with 16x2 RGB backlight negative LCD (item 784) not displaying full ine of text

by adafruit_support_bill on Thu Feb 14, 2013 6:22 am

It's displaying the whole of the text, but scrolling bottom to top just in the first column.

That wasn't how you described it in your initial post:
The issue I have is that it only displays text in the first column, the remaining columns remain blank.
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Re: USB + Serial Backpack Kit with 16x2 RGB backlight negative LCD (item 784) not displaying full ine of text

by darrenw on Thu Feb 14, 2013 1:19 pm

It's displaying the whole of the text, but scrolling bottom to top just in the first column.
was not my post, it was from another user. However it does equaly describe my issue.
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Re: USB + Serial Backpack Kit with 16x2 RGB backlight negative LCD (item 784) not displaying full ine of text

by adafruit_support_bill on Thu Feb 14, 2013 2:00 pm

was not my post, it was from another user.

Sorry, I didn't notice the hijack there.
However it does equaly describe my issue.

If it were a soldering problem, you would not be seeing text on the display consistently - if at all. I suppose it is possible that the problem is on the PC side and the wrong command sequences are being sent to the backpack. You might try just sending plain text to it and see how it behaves then.
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Re: USB + Serial Backpack Kit with 16x2 RGB backlight negative LCD (item 784) not displaying full ine of text

by darrenw on Thu Feb 14, 2013 2:44 pm

I have tried sending text from RealTerm with the same result that I get from LCDSmartie. Sending hex commands appear to work fine (although I have not tested them all).
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Re: USB + Serial Backpack Kit with 16x2 RGB backlight negative LCD (item 784) not displaying full ine of text

by adafruit on Thu Feb 21, 2013 12:36 pm

do you mind posting up a photo of what you're seeing? its fairly easy to update the firmware on the backpack if necessary - we did test it with Smartie so not sure what would be amiss :)
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Re: USB + Serial Backpack Kit with 16x2 RGB backlight negative LCD (item 784) not displaying full ine of text

by darrenw on Sat Feb 23, 2013 4:38 pm

Please find attached sequential photos displaying a line of text sent from LCDSmartie (sorry about the quality, but they are good enough to see the problem). If this can be fixed by a firmware upgrade, that would be a great result.
Attachments
LCD display 3of3.jpg
3/3
LCD display 3of3.jpg (30.46 KiB) Viewed 1495 times
LCD display 2of3.jpg
2/3
LCD display 2of3.jpg (51.58 KiB) Viewed 1495 times
LCD display 1of3.jpg
1/3
LCD display 1of3.jpg (30.62 KiB) Viewed 1495 times
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