invert lcd on mpc823l

invert lcd on mpc823l

[Stefan Wanner]

hi all

i'm using a sharp LQ64D341 tft lcd on a MPC823L board with the
kernelsources from denx.de. now when i use /dev/tty0 (the frambuffer
character device) the output apears inverse (white background, black
text). the tux in the upper left corner has also strange colors (looks
also like inverse). how can i fix that?

thanks for helping

stefan


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Re: invert lcd on mpc823l

[Wolfgang Denk]

In message <3BD3E484.1030909@gmx.ch> you wrote:
>
> i'm using a sharp LQ64D341 tft lcd on a MPC823L board with the

Is this a custom board, or some standard product?

> kernelsources from denx.de. now when i use /dev/tty0 (the frambuffer
> character device) the output apears inverse (white background, black
> text). the tux in the upper left corner has also strange colors (looks
> also like inverse). how can i fix that?

Are you sure that all wires are connected properly?

Works here - on a TQM823L-E.

Wolfgang Denk

--
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-4596-87  Fax: (+49)-8142-4596-88  Email: wd@denx.de
What can it profit a man to gain the whole world and to come  to  his
property with a gastric ulcer, a blown prostate, and bifocals?
                                     -- John Steinbeck, _Cannery Row_

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Re: invert lcd on mpc823l

[Stefan Wanner]

i'm using a tq components board (bought it from you) the pins are
connected this way:


Pinbelegung zum Anschluss des SHARP LQ64D341 an TQM823L Board
-------------------------------------------------------------

TQM823L         ------------->      SHARP LQ64D341 TFT

Stecker Pin     Signal              Pin     Signal

X11                                             1
X11     20 ---- SHIFT/CLK   ----->  2       CK
X11     14 ---- FRAME/HSYNC ----->  3       Hsync
X11     16 ---- FRAME/VSYNC ----->  4       Vsync
X11                                 5
X11                                 6       R0    RED (LSB)
X11                                 7       R1    RED
X11     5  ---- LCD_A       ----->  8       R2    RED
X11     26 ---- LD2         ----->  9       R3    RED
X11     25 ---- LD1         ----->  10      R4    RED
X11     24 ---- LD0         ----->  11      R5    RED
X11                                 12      GND
X11                                 13      G0    GREEN (LSB)
X11                                 14      G1    GREEN
X11     3  ---- LCD_B       ----->  15      G2    GREEN
X11     29 ---- LD5         ----->  16      G3    GREEN
X11     28 ---- LD4         ----->  17      G4    GREEN
X11     27 ---- LD3         ----->  18      G5    GREEN
X11                                 19      GND
X11                                 20      B0    BLUE (LSB)
X11                                 21      B1    BLUE
X11     1  ---- LCD_C       ----->  22      B2    BLUE
X11     32 ---- LD8         ----->  23      B3    BLUE
X11     31 ---- LD7         ----->  24      B4    BLUE
X11     30 ---- LD6         ----->  25      B5    BLUE
X11     19 ---- GND         ------  26      GND
X11                                 27      ENAB  Siehe Manual 7-2
(nicht auf High!)
X11     7  ---- VCC5V       ------  28      VCC
X11                                 29
X11                                 30      R/L   Anzeigemodi  Siehe
Manual Seite LCY-99193-4
X11                                 31      U/D   Anzeigemodi  Siehe
Manual Seite LCY-99193-4


Wolfgang Denk wrote:

> In message <3BD3E484.1030909@gmx.ch> you wrote:
>
>>i'm using a sharp LQ64D341 tft lcd on a MPC823L board with the
>>
>
> Is this a custom board, or some standard product?
>
>
>>kernelsources from denx.de. now when i use /dev/tty0 (the frambuffer
>>character device) the output apears inverse (white background, black
>>text). the tux in the upper left corner has also strange colors (looks
>>also like inverse). how can i fix that?
>>
>
> Are you sure that all wires are connected properly?
>
> Works here - on a TQM823L-E.
>
> Wolfgang Denk
>
>


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Re: invert lcd on mpc823l

[Paul Mundt]

On Mon, Oct 22, 2001 at 11:19:00AM +0200, Stefan Wanner wrote:
> i'm using a sharp LQ64D341 tft lcd on a MPC823L board with the
> kernelsources from denx.de. now when i use /dev/tty0 (the frambuffer
> character device) the output apears inverse (white background, black
> text). the tux in the upper left corner has also strange colors (looks
> also like inverse). how can i fix that?
>
Try inverting your colormap. Try something like the following:

--- arch/ppc/8xx_io/lcd823.c.orig       Mon Oct 22 09:30:43 2001
+++ arch/ppc/8xx_io/lcd823.c    Mon Oct 22 09:30:46 2001
@@ -638,6 +638,7 @@
     }

     lcd823_init_dev();
+    fb_invert_cmaps();
     lcd823_install_cmap(0, &fb_info);

     if (register_framebuffer(&fb_info) == 0) {

Regards,

--
Paul Mundt <pmundt@mvista.com>
MontaVista Software, Inc.

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