I have a sparkfun serial LCD, this one to be specific:
http://www.sparkfun.com/commerce/produc … ts_id=9395
I have had arduino projects writing to the LCD with no problems until yesterday.
However when I power it on now, I get the sparkfun logo followed by garbage text, mostly X’s
I have tried programming the most simplest program with just Hello world and I still get the problem.
Any thoughts?
Do you leave it connected when you upload your program? It can mess up the screen. Always disconnect it when uploading.
Oh yeah I know about that.
Like I said I have had it working before many times. It is almost like the firmware is messed up inside or something.
Finally got it working…
I had my LCD connected to the serial port instead of using software serial so that I could have a higher refresh rate… I never disconnected the lcd during programming… some special characters must have gotten sent and messed it up!!!
I found this thread to help me out: