I've been trying out my new LCD display (Xiamen Ocular, http://www.sparkfun.com/datasheets/LCD/GDM1602K.pdf), but I'm having some trouble. I've tested both the 8bit and 4bit LCD libraries, and both aren't behaving as expected:
-
When turned off, the display is black.
-
With the standard 8bit LCDLibrary and the example codes on the library page, I see one empty display line, surrounded by all black (which is unexpected, but might be a feature of the display). The debugging light on pin 13 is on. Contrast regulation works, but there is no text.
-
With the LCD4bit library and the library example code, the same thing, but this time I see both lines of text.
I've checked the wiring twice, and there don't seem to be any mistakes. Any ideas what I'm doing wrong?