/MCLR is OC when used as a data line - isn't that one of 'em? Works as an out only, IIRC.
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- posted
20 years ago
-- Best Regards, Mike
Help getting an LCD to work
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- Vote on answer
- posted
20 years ago
I haven't used Optrex yet but My biggest prob getting those black lines to go away and everything else to init was that I left the R/W line open. The controller inputs have internal weak pullups so you have to either tie R/W low or drive it with the PIC.
The other thing I found was that the home command was pretty useless or something like that. It didn't do what the HDwhatever Spec sheet said. I have to use Clear Display.
Also, resetting the PIC which runs my LCD init code sometimes doesn't give the LCD enough time to do whatever it needs to do, I have to power down the LCD.
I'm not sure, but for the 4 bit interface, I may have had to run the init code twice. Once to get it in 4 bit mode and again once it's there.
-- Best Regards, Mike