Store Custom Characters for LCD in EEPROM?

[HenrikOlsson]

Hi Chris,
Sure, that should work.
Yes, looking at the block diagram in the HD44780 datasheet it does seem like you COULD actually load 8 chars to CGRAM, display them (which writes them to DDRAM) and then overwrite the CGRAM with 8 new ones, display those and so on.
Anyway, if there's no need for more than 8 at a time then you're all set.

Keep us posted!
/Henrik.

[spcw1234]

Hi Chris,
Sure, that should work.
Yes, looking at the block diagram in the HD44780 datasheet it does seem like you COULD actually load 8 chars to CGRAM, display them (which writes them to DDRAM) and then overwrite the CGRAM with 8 new ones, display those and so on.
Anyway, if there's no need for more than 8 at a time then you're all set.

Keep us posted!
/Henrik.

My experience with this is when you try to load new characters into the CGRAM it overwrites the ones currently being displayed. I have not been successful displaying more than 8 characters, or even displaying 8 and loading more into CGRAM. Some displays do have slightly different features so it may be possible on the right display.