How to program SPI LCD-Display

Stein

I got some real inexpensive 2*16 LCD display, thinking they must be serial or parallel.
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But, they are SPI. (Type: HAC-162J)
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I then sourced the web for some info, but can only find one reference·using some other uP.
(See attachment)
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And I can’t find any datasheet on this SPI Display.
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I think a N/V column had a project ones using SPI Display, but can’t find it.
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Anybody out there heard about SPI LCD?
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stein.

Jon Williams

If it's SPI then the SHIFTOUT function is what you'll use to send data to the display.

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Jon Williams
Applications Engineer, Parallax
Dallas Office

Stein

I tried some Shiftout lines earlier today, but it had no effect on the display.
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I think I need to setup the display first, like we do with·a parallel display.
But that is hard to do when I don't even have·the datasheet.
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I was hoping that someone accidentally had some code I could work from.
Was I mistaken about an N/V column using SPI LCD?
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Stein

Jon Williams

Yes, I think so. I created an LCD controller for my column with the MCP23016 -- an I2C device; perhaps that's what you were thinking about.

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Jon Williams
Applications Engineer, Parallax
Dallas Office

RickB

Stein:

I did a google search with your p/n and lcd, and came up with bs2 code in french. There appears to be a data sheet also. Try the translate function also.

Rick

Stein

How did I miss that in my web source?

Yes, that BS2 program was working fine.
But the program only works with a BS2 and not BS2p. I don’t know why.

I will study the “simple” codes and revile a more complete code when I finish, so other stampers can study later.

Thanks.
Stein.

RickB

Stein:

I am not terribly fluent in BS2 programming but, there may be speed dependent code here. The BS2p is faster and that may be a·problem with the existing code.

Rick