Hi Vladimir,
Like a curiosity, I disconnected the flat cable of TFT mounted in the
IAR-OLIMEX LPC2478-STK and I increase the horizontal pixel size (and the clock
too). At 546 value work and at 547 value the signals is missing (and LCD-Demo
bloked).
240 x 546 = 131040 LCD-Demo
127 x 1024 = 130048 My LCD
240 x 547 = 131280 *dont work LCD-Demo
I think that: 16kb x 8 = 131072. This value is set somewhere and she is
overpass.
Regards,
Augustin
Reply by micro_augustin●April 9, 20092009-04-09
Hi Vladimir,
I use example from IAR-Olimex board for my LCD (via LVDS board). I will check
again my initialisation.
Thanks!
All the best!
Augustin
Reply by ljaschko●April 9, 20092009-04-09
Hi, Augustin,
Yes, sequence of initialization inluences of result. I had discussion on some
internet forum. My advice was to use Olimex 2478 starter kit example as
reference, and it worked.
You may find this example in IAR Evaluation edition
\Program Files\IAR\ARM\examples\NXP\LPC24xx\IAR-LPC-2478\LDC_Demo\
Note: example is not for pallette mode.
Best regards
Vladimir
Reply by micro_augustin●April 9, 20092009-04-09
Hi,
I implemented a table color, so thi is not a problem. I think at 127 vertical
pixel size. Whit 128 size the lcd signals are missing.
Vladimir, if you have time, I want to get initialisation step by step. The
problem is in memory,AHB or LCD initialisation. Something escape me.
Regards,
Augustin
Reply by ljaschko●April 8, 20092009-04-08
Hi Augustin,
Let me compare:
Your: 1024 768 1(8bpp) = 786432
My: 800 x 480 x 2(16 bpp) = 768000
My system works with 24 MHz pixel, your should work too.
Unfortunatelly, (or fortunately!) I don't need such resolution.
Maybe something wrong in your 8bpp initialization?
1, 2, 4, or 8 bpp are palettized color
Regards
Vladimir
Reply by micro_augustin●April 8, 20092009-04-08
Hi Vladimir,
In 1024x127 work inclusive 24 bpp. I have two memory SDRAM 16Mb x 16bit,
result 16Mb x 32 bit, procesor clock 72Mhz. I dont undertand why is present this
resolution(1024x768) in user manual. I was satisfief if it work in 8 bpp, even 4
bpp.
All the best,
Augustin
Reply by ljaschko●April 8, 20092009-04-08
Hi Augustin,
How many bpp do you use? RAM bus width?
I worry that you are too optimistic to get this microcontroller running with
such resolution/frequency. LPC2478 can't give more than it can give.
I've tested with 800/480/24 bpp. I was necessary to reduce frequency to 12
MHz. Signal was presented, but synchronization lost.
Best regards
Vladimir
Reply by micro_augustin●April 8, 20092009-04-08
Hello,
In this moment I work with 1024x127/13Mhz clock/60hz. I can increase the
clock, LCD suport this (NL10276BC13-01C), but when I increase the vertical pixel
size LCD controller signal from LPC are missing.
Thanks for help in this problem!
Augustin