Strange LCD Issue

Testing/Troubleshooting
1

Hey guys.

I put together a test cable to make sure my LCD works.  It’s connected to my computer’s parallel port and draws 5 volts from the power supply.  Suppose I want to write “ABC D” to it.  The screen shows, “AABBCC  DD.”  What could be wrong?  I’ve double checked my wiring, and it’s all where it should be…

My LCD’s a backlit HD44780, 16x2, 8-bit.

2

Well it seems that your PC isn’t writing correctly to the LCD… You might as well hook it up to a core module and test it in the real-life environment it will be used in :slight_smile:

3

real-life environment

;D ;D ..thats a real s1 … lol!

greets

Doc

4

Point taken.