How to load custom characters to CGRAM of LCD?

arunb · Joined: 08 Sep 2003 Posts: 492 Location: India

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

sliders_alpha · Joined: 03 Mar 2008 Posts: 55

CG : RAM

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