Re: 3.5inch display problem....

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No one else here have time to have a look at this problem??????
--
Ramesh.c
Innovate Sofware Solutions.
Bangalore.


"Rameshchandra" wrote:

Yes. I was really fed up with this project. I don't have an document and
commands of this spi display.

Actually we are simulating the spi interface, though 4 pins, reset,
chipselect, clock, data.

I am comparing the driver runtime environment on pxa255 with that of the
pxa270. For the same spi initialization, the same display connected with
pxa270 is working properly, whereas in pxa255 it is behaving as i written in
previous post.

No improvements on this yet... SPI initialization is lcd specific, is this
got anything to do with the processor. Since i am using the same spi
initialization commands that was present in pxa270(working commands), in my
board pxa255 it should work with out any problems right?

I verified my gpio initialization 5 to 6 times... evrything seems to be
fine. If my gpio initializations are wrong, when i enable the lcd controller
it should not respond right? but in this case it is responding...

What is NEC type display??

Anone out there to help in this issue??

--
Ramesh.c
Innovate Sofware Solutions.
Bangalore.


"Steve Araiza" wrote:

Sounds like you are using an NEC display? I am using one with my PXA270
platform and it was a pain getting the SPI programming of it correct (very
sparse documentation).

I would not try to port the PXA270 LCD display driver back to the PXA255.
There are probably too many differences in the registers and modes. That's
what sounds wrong with the color bar test, you might be using a different
color mode than you think.

You should start with the PXA255 LCD driver, and back port just the SPI
configuration into the LCD driver.

I have not used the PXA255, but I'm sure there are many differences between
the LCD registers, and I would not expect the 270 driver to work without
serious investigation into both dev manuals for the CPUs.

steve ariaza



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