From: David C Brown <dcb.home@gmail.com>
To: Microcontroller discussion list - Public. <piclist@mit.edu>
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Date: Sun, 9 Feb 2020 10:45:21 -0800
Subject: [EE] IIC "backpacks" for LCD displays
Thread-Topic: [EE] IIC "backpacks" for LCD displays
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These are offered very cheaply on eBay and purport to allow you drive ann
LCD module with just two wires.   Unfortunately the only information I can
find on line about using them is on Arduino forums where you get the
typical Arduino response "down load the library".   Since I am connecting
to a PIC that isn't much use.

I am very familiar with both LCD modules  buses and IIC bus and my worry is
this.  The LCD modules are a nine bit interface and IIC sends 8 bit data.
so how do you marry them together.

It is easy enough to envision an answer.  At its simplest you would send
two  IIC bytes to get the nine bits.  Or to send a control byte indicating
whether the subsequent bytes are commands or data.

But guessing how something works is rarely productive so help appreciated
__________________________________________
David C Brown
43 Bings Road
Whaley Bridge
High Peak                           Phone: 01663 733236
Derbyshire                eMail: dcb.home@gmail.com
SK23 7ND          web: www.bings-knowle.co.uk/dcb
<http://www.jb.man.ac.uk/~dcb>



*Sent from my etch-a-sketch*
--=20
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