4X20 backlit LCD upgrade help

djgilmo32

I have upgraded from a 2X16 nonbacklit LCD to the 4X20 LCD and I was wondering if the following code must be used in order to display text EVERY TIME....

SEROUT TX, LcdBaud, [noparse][[/noparse]LcdBLoff, LcdOn1, LcdCls, LcdBLon]
· PAUSE 250
· SEROUT TX, LcdBaud, [noparse][[/noparse]"Enter Selection"]

...or can I just write...

SEROUT TX, LcdBaud, [noparse][[/noparse]LdcBLon, LcdOn1,·LcdCls, "Enter Selection"]
PAUSE 250

Also, if i write [noparse][[/noparse]LcdBLon] once, will it leave the backlight on until I write [noparse][[/noparse]LcdBLoff]?

Jon Williams

Remember that you need to insert a 5 ms PAUSE after the LcdCls byte -- this is in the documentation.· And yes, once you turn the backlight on it will stay on until you turn it off or power is cycled.

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Jon Williams
Applications Engineer, Parallax