Running Microwindows on monochrome/grayscale LCD

Running Microwindows on monochrome/grayscale LCD

[llandre]

Hi all,

I have to write a couple of Microwindows screen drivers for monochrome 
and 4-bpp greyscale LCD panels. As reference I'm looking at 
src/drivers/scr_ecos.c but this supports color mode only (RGB 555 and 
RGB 565) and, for istance, I can't understand which pixel format I have 
to use (MWPF_PIXELVAL, MWPF_PALETTE ...) and if rmask, gmask and bmask 
have to be handled.
I'd like to find a driver supporting monochrome or grayscale panels to 
use it as starting point. Anybody can provide such an example? Any hint 
or advice will be appreciated, too.


Thanks a lot in advance,
llandre

DAVE Electronics System House - R&D Department
web:   http://www.dave-tech.it
email: r&d2@dave-tech.it

Re: Running Microwindows on monochrome/grayscale LCD

[llandre]

Hi,

if I understand correctly you suggest to keep pixtype set to 
MWPF_TRUECOLOR555 (or MWPF_TRUECOLOR565) and to use only G component to 
paint the pixels, while R and B become just dummies. It it correct? What 
about bpp field?


> Hi
> You can try like this
> Make R,B value  equal to 0 , which will make G as display input for 
> monochrome display
> So Assign r,b=0 in the  code and try
> Thanks
> Sai
> */llandre <r&d2@dave-tech.it>/* wrote:
> 
>     Hi all,
> 
>     I have to write a couple of Microwindows screen drivers for monochrome
>     and 4-bpp greyscale LCD panels. As reference I'm looking at
>     src/drivers/scr_ecos.c but this supports color mode only (RGB 555 and
>     RGB 565) and, for istance, I can't understand which pixel format I have
>     to use (MWPF_PIXELVAL, MWPF_PALETTE ...) and if rmask, gmask and bmask
>     have to be handled.
>     I'd like to find a driver supporting monochrome or grayscale panels to
>     use it as starting point. Anybody can provide such an example? Any hint
>     or advice will be appreciated, too.


-- 
llandre

DAVE Electronics System House - R&D Department
web:   http://www.dave-tech.it
email: r&d2@dave-tech.it