Trouble with LK204-25-WB-C74
Bluetec
Posts: 2
Hi !
I purchased a 4x20 Serial LCD with Keypad Interface (Item code 30058) from Parallax. The display is the special Stamp version with TTL levels.
The display came without manual and the manuals I was able to find online do not refer to this particular display.
My problem is, that I can't get the display to work with a BasicStamp2SX. The display lights up normally but as soon as I send text only gibberish appears. I think it is a baud rate issue. Someone told me that the default baud rate of the display is 19200. How can I set the baud rate to 9600 ? There are no jumpers or anything else on the display.
Any help is greatly appreciated !
Gary
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I purchased a 4x20 Serial LCD with Keypad Interface (Item code 30058) from Parallax. The display is the special Stamp version with TTL levels.
The display came without manual and the manuals I was able to find online do not refer to this particular display.
My problem is, that I can't get the display to work with a BasicStamp2SX. The display lights up normally but as soon as I send text only gibberish appears. I think it is a baud rate issue. Someone told me that the default baud rate of the display is 19200. How can I set the baud rate to 9600 ? There are no jumpers or anything else on the display.
Any help is greatly appreciated !
Gary
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Comments
www.parallax.com/StoreSearchResults/tabid/768/txtSearch/30058/List/0/SortField/4/ProductID/55/Default.aspx
Be sure to download the errata as well.
Page 18 of the manual gives the codes needed to change the baud rate.
You can set it from 1200 baud to 57,600 baud.
You are correct that the default baud rate is 19,200.
Do you have this baud rate set correctly on your BS2SX?
phil
Post Edited (phil kenny) : 7/28/2009 7:03:13 PM GMT
www.parallax.com/Portals/0/Downloads/docs/prod/audiovis/LK204-25-2.x.pdf
If you're unable to change the baudrate via the Stamp, connect the display to your PC and change it.
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Don't worry. Be happy
and only accepts TTL signals.
Hooking it up to a PC to change the baud rate will require adding an
RS232-to-TTL converter.
phil
Hi Phil,
I saw this but was not sure if this applies to my particular display.
The next step is to send the proper code to the display to set it to 9600 baud. Can this only be done thru a PC and not thru the Stamp ?
Thanks for the quick feed back.
Gary
P.S.
I am a Mac user, don have and don't want a PC.