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Altera_Forum
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16 years ago

black bar on the lcd

hello all! i am using the nios ii dev kit stratix ii edition. and i tried fiddling around a bit with the lcd a bit. just writing some random bits to lcd_e, lcd_rs, lcd_rw and lcd. unfor...
Altera_Forum's avatar
Altera_Forum
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16 years ago

Hi,

The black bar on the first row of the LCD is due to a wrong initialization process, typically caused by timing violations, but it is very hard (practically impossible) to break the LCD controller just by playing with the bits. Did it work OK at any time?

If it did never work, take into account that the LCD is EXTREMELY slow, so check if your system is providing it a right clock frequency and also check if you are doing a correct initialization sequence (see the datasheet).

See you!