problem with lcd.c and 16f877A

fregate · Guest

hello.

I use a LCD with my pic 16f877a. all is working exept that if I want to write a 0, a P, a p or other characters like 0bxxxx0000, my sceen bug (I have a blank sceen !

I have test lcd.c on port D and port B, and I have the same problem !

klausdejong · Joined: 15 Nov 2004 Posts: 18

Do you use the eight wire setup for your LCD?

If my memory is correct lcd.c uses the setup with 4 databits.

Try it, it may help.

Regards,

Klaus

Guest · Posted: Sat Jul 15, 2006 11:40 am

y only use the 4 wires D7 to D4 (+ E, R/W ans RS), like it is discribe in the lcd.c code.

fregate · Guest

yIonly use the 4 wires D7 to D4, and E, R/W ans RS, like it is discribe in the lcd.c code.

I have do a lot of test, dans it is when I want to send a character with 4 zero in the lower bits, the left part of the sreen became black, and the LCD stop to respond.