Sparkfun 20x4 Serial Enabled Display

rfryar · Post by **rfryar** » July 17th, 2007, 2:23 pm

I took a quick look at LCD Smartie and can not get it to display correctly on my LCD display. All of the provided screen drivers work until it starts scrolling or needs to clear the display and then it freezes the screen. The schematics for my display are here

It is based on the HD44780 but communicates through TTL serial control instead of the Parallel port. I started to look into the test driver but I can not seem to get that to work right either. The test driver appears to be in some 4x16 mode instead of 4x20. I tried to customize it based of the "escape" controls listed and none of the commands in the schematics appear to be passed properly in the test driver. I know the testdriver.ini file is getting loaded as if I mess with the gotoline options it does effect the display, but not in a good way.

Any one tried this display? I will look at the DLL information and see if I can create a driver, but do not want to duplicate anyone elses work if they have already gotten this to work.

Thanks so much for your time,

Rick Fryar
rickf@mindless.com

rfryar · Post by **rfryar** » July 26th, 2007, 4:36 pm

Just in case you missed it I developed my own display driver for the SparkFun LCD. Here is the link to the first release:

Spark Fun Driver Forum Entry

Enjoy,

Rick