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Dangerous Prototypes

Other projects => Past projects => USB serial LCD backpack => Topic started by: anego on November 17, 2011, 11:18:55 pm

Title: Change in lcd from 8bit to 4 bit mode
Post by: anego on November 17, 2011, 11:18:55 pm
hello.
a little suggestion
maybe you can change in LCD HD44780 8 bit -> 4bit mode and unused pins can be used for more in and outs (buttons relays etc.)
sorry for my bad english
Title: Re: Change in lcd from 8bit to 4 bit mode
Post by: ian on November 18, 2011, 08:10:19 am
Hi anego,

That is a great idea, thank you. I'll take a look at this the next time I do firmware updates.
Title: Re: Change in lcd from 8bit to 4 bit mode
Post by: tayken on January 19, 2012, 02:18:36 am
[quote author="adamscott"]If I change LCD from 8-bit to 4 -bit mode then what effects I can get or Is this process useful any way?[/quote]
Advantage: You get 4 more pins (D0-D3) that can be used for other stuff.
Disadvantage: Might slow things down a bit, but you'll not be able to recognize it unless you're running some firmware with lots of interrupts + LCD writes.
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