Hi
Have a 16F18877 and a LCD 4*20 connected to port D0-D3, RS=RB3 EN=RD7

Need a lcd.c file that works, have been trying to modify those i found online,
help needed

 

Hello,

The file will be dependend on the controller used on the LCD.
When you know the controller type, the search will be more easy.

Bertus

 

Haven't we been here before? At least a couple of times as I recall.


For example. What is wrong with the code that you used here?

https://forum.allaboutcircuits.com/threads/cant-init-more-than-one-line-on-lcd.154524/

and here

https://forum.allaboutcircuits.com/threads/16f18877-and-4-lcd-compile-error.143415/#post-1213501

If you got it to work there why is this new chip presenting a problem?

And you should well know by now you need to provide a lot more information then what you have done in order to get help.

 

Ok,
This is the LCD https://dk.farnell.com/midas/mc4200...numeric-20x4-yellow/dp/2675677?st=mc42004a6wr
Running on a SPLC780D controller
Connected on my PIC to port D0-D4
D4 = Port D3
D5 = Port D2
D6 = Port D0
D7 = Port D1
EN on port D7 and RS on RB3

The code i have used before will not work, and i think i might have something to do with :

LCD Dataline connected to "half" port D,

For some years ago i have even a code that will work on every port,
Could use 4 different port for datalines, if i would.

 

Hello,

As said, check the used controller.
In the datasheet this is given:
* - For full design functionality, please use this
specification in conjunction with the SPLC780D
specification. (Provided Separately)

There seem to be files for ATtiny on github:
https://github.com/user890104/ATtiny2313_SPLC780D1_TC1604A-4bit

Bertus

 

And has said, many times before check all of your wiring one pin at a time. No one has a crystal ball and can see what is in front of you.

 

Works now
Somehow i can only select 8 MHz, or less, 12 16 20 32 are all given trouble.
But then i will have to run 8 MHz, fine by me

 

Works now
Somehow i can only select 8 MHz, or less, 12 16 20 32 are all given trouble.
But then i will have to run 8 MHz, fine by me

See what happens when you check your work?

My guess is your timing parameter is incorrect for 12, 16, etc.