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How to load custom characters to CGRAM of LCD?

 
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arunb



Joined: 08 Sep 2003
Posts: 492
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How to load custom characters to CGRAM of LCD?
PostPosted: Fri Jun 19, 2009 12:32 am     Reply with quote

Hi,

I am able to load custom characters into an LCD (uses HD44780) immediately after power up.

Now I need to load another set of characters (overwrite the existing ones). So I set the CGRAM address to 0 and load the bit patterns. But this does not work. I get garbled characters that change after every power up.

Please help.

thanks
arunb
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Joined: 03 Mar 2008
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PostPosted: Fri Jun 19, 2009 2:46 am     Reply with quote

CG : RAM

Data are lost after a power down, you'll need to re-charge them every power-up.
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