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11 years, 1 month ago.
20x4 LCD not playing nicely...
Hi all,
Thanks in advance for any comments on this, I'm using a fairly cheap 20x4 LCD: http://www.farnell.com/datasheets/1485434.pdf
I'm just using the straight out LCD enhanced code from codebook, and it compiles fine but just doesn't seem to print anything on the LCD.
Do I need a special driver or something for this display or do I need to use all 8 of the d0-d7 for some reason? I can't get my head around the datasheet on this one :/
Thanks again in advance
George
Quick edit, the contrast adjustment shows up on rows 1 and 3 but not 2 and 4. Again, this doesn't seem normal... Any thoughts?
1 Answer
11 years ago.
It works! Thank you very much, great to have an answer from the LCD man himself ;)
I checked all my soldering joints on the LCD board and it's now working beautifully.
Contrast adjust on row 1 and 3 is normal. The 4x20 is in fact a 2x40 display split in half and stacked.
Check your wiring and make sure rw is at gnd.
posted by Wim Huiskamp 19 Jun 2013