Arduino LCD playground | LCD 4-bit library library built into the IDE will also work using 6 Arduino Pins in 4 bit mode. Display 16×2 (KS controller, black & white, no back-light, HD code compatible). I suggest you start with the original arduino LCD tutorial, using all 8-bits in the data-bus. (For another sample code for KS/S6A, go to .. If 4-bit mode * – whether When in 4-bit interface define if the data is in the upper. In 4-bit bus mode open these pins. MPU. DB DB7. I/O. Data bus When 8-bit bus mode, used as high order bidirectional data bus. In case of

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Generally speaking, LCDs with fewer than 80 characters have the data pins starting at pin 1 and the LCDs with less than 80 characters have the power and ground connections starting at pin 1. Could I by any chance see the header file you used and possibly an example program using these functions?

Haven’t received registration validation E-mail? What are good practices when using SPI? You can get the source from svn anonymously over http using this command-line: It supports all the ascii chars and is basically used for displaying the alpha numeric characters.

Try looking at the linker file and see if there is anything defined as PORTDbits, if not, see how they defined it. Quick Links Categories Recent Discussions. As it turned out, Enable 2 was in the wrong position and all of the four data lines were shifted by one position.


I will hopefully be able to get it working. The timings are similar as above only change is that RS is made high for selecting Data register. Related Hardware and Initiatives.

How to use it The library is intended to be a 4-bit replacement for 4bbit original LCD tutorial code and is compatible with very little change. As it turns out, the initializing sequence difference between the Samsumg KS and the Hitachi HD was not the issue.

See this forum post for more troubleshooting.

Interfacing to LCDs with Samsung KS controller — Parallax Forums

In your circuit 2: The below sample code shows how to use the already available LCD functions. It has been tested successfully with: It is effectively redundant.

A speed tuned version with assembler: It powers up fine, I get the two dark lines on lines 1 and 3 and Moe have the contrast POT working fine. The HD datasheet pdf I looked at specifies a js0066. What I DO get is the screen to clear and a cursor in the upper left corner. I’ve pasted it below for anyone who might be in the position I once was. I’m 4biit sure what that error means, cata the linker file that you use has not defined PORTDbits since you have a different compiler? If the packages were smaller, I’d contemplate sitting two 4×20 side by side, but the circuit boards and bezels on the LCD keep the actual displays from lining up close to one another.


Have a opinion, suggestionquestion or feedback about the article let it out here! The playground is a publicly-editable wiki about Arduino. What helped was knowing that I had partial success and that getting control commands to work meant I was either sending partial commands or RS was not getting to the LCD. For more info pleae look at this Forum Post.

In your circuit 1: You can change these but it is necessary to use contiguous, ascending Arduino pins for the library to function daya. Hi, Sorry I hadn’t checked this for a while. Refer this link for more info on LCD libraries.

This frees another arduino pin for you.

An old 4-bit LCD library (now redundant)

Please enable JavaScript to view the comments powered by Disqus. Download the old library!

This pin is used to send the enable trigger to LCD. Arduino on other Chips. I get an error on compile.