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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I’ve successfully gotten the Stamp to communicate with a similar 4×40 LCD that uses the more common Hitachi HD controller, but the same code does not apply. As “compatible” as they may be stated as being, there appears to be ks00066 differences. My Research found a datasheet for the KS and it is in mde that I learned that the initialization sequence is a bit different.

But I am still failing to get anything but garbage to print on the display.

Sample code for Samsung KS0066/S6A0069 LCD driver

The problem seems to be that it is not successfully getting the command to switch to 4 bit mode, the method that I am using for the other LCD as well. What I DO get is the screen to clear and a cursor in the upper left corner.


Kks0066 suspicion is that because these commands are lower in value on the LSB side of a bytethat I’m only successful with them because the MSB nibble is getting chopped off.

The controller appears to still be looking for an 8 bit instruction instead of two 4 bit instructions. Determining the correct pinouts was another challenge as they were not stated as correct on the company’s website. I’m thinking I wouldn’t be able to execute cursor movement commands if my data lines were incorrect. I’ve had good success with serial LCDs, but cannot find them in 4×40 size.

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. I’d like to know if anyone has had success with this controller and what the trick was. I seem to be getting real close to getting it to work, but need that extra piece of information that I’m not seeming to come up with as yet.

LPC Lcd 4bit – Tutorials

It powers up fine, I get the two dark lines on lines 1 and 3 and I have the contrast POT working fine. LCDOUT commands can produce results, but they are random characters, but consistent in each experiment. Comments 2 Comments sorted by Date Added Votes. I figured this situation out with continued diligence. As it turns out, the initializing sequence difference daga the Samsumg KS and the Hitachi HD was not the issue.


In fact the initialization sequence for the Hitachi works on the Samsung controller. What was completely different was the pinouts as compared with any documented 4×40 LCD I could find.

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 datx 1. 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.

Add to that the fact that the second controller was not responding, I know I could have had up to three pin connections wrong. As it turned out, Enable 2 was in the wrong position and all of the four data lines were shifted by one position. All is well that 4bih well. Sign In or Register to comment.

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