Re: [Gumstix-users] Re: Panasonic EDMGRB8KJF

[Jim W. <jwa...@qu...>]

Hi,

I'm using a command line something like this, and I'm getting something 
between 60 and 120Hz framerate:

 console=ttyS0,115200n8 root=1f02 rootfstype=jffs2 reboot=cold,hard 
video=pxafb:mode:640x480-16,passive,mono,dual,hsynclen:1,vsynclen:1,left:1,right:1,pixclock:240000,hsync:1,vsync:1,outputen:1,pixclockpol:0

I'm using a monochrome dual-controller EL panel that looks like a 
passive LCD from an interface standpoint, so some of my options won't be 
applicable for the Panasonic panel, but the pixelclock should be about 
the same (or at least give you an idea of the format).

Thanks,

Jim


Nava Whiteford wrote:

>The frame clock is simply ultimately calculated from the pixel clock? Set the 
>pixel clock right in the pxafb options and the frame clock should be correct 
>as I understand it.
>
>On Wednesday 11 May 2005 12:50, cyrille francois wrote:
>  
>
>>Hello
>>
>>Thanks for suggestions, but nothing done.
>>
>>I have another question :
>>
>>On the pinout named L_FCLK (clock for frame), the signal's period is 28
>>ms (~ 36 Hz). Is it possible to change this period ?
>>With the Panasonic EDMGRB8KJF LCD I need a period between 8 ms to 16 ms
>>(120 Hz to 60 Hz).
>>
>>Thanks.
>>
>>Cyrille
>>
>>Le mardi 10 mai 2005 à 18:20 +0200, cyrille francois a écrit :
>>    
>>
>>>Hello
>>>
>>>I'm a newbie about lcd / framebuffer.
>>>
>>>I'm trying to use the panasonic EDMGRB8KJF (LCD STN colored passive
>>>touchscreen) : http://www.zlcd.com/downloads/EDMGRB8KJF.pdf
>>>
>>>Does somebody succeed to use this LCD with gumstix ?
>>>
>>>I use the following wiki to begin with pxafb :
>>>http://www.gumstix.org/tikiwiki/tiki-index.php?page=Display
>>>
>>>I use this page for register setting :
>>>http://www.earthlcd.com/sa1110.htm
>>>
>>>I have problems :
>>>
>>>1.The pxafb seems to work with the following command line kernel
>>>
>>>bootargs=console=ttyS0,115200n8 root=1f02 rootfstype=jffs2
>>>reboot=cold,hard video=pxafb:mode:640x480-8,pa
>>>ssive,left:21,right:2,vsynclen:3,hsynclen:13
>>>
>>>  The clock pinout where here (observation with oscilloscope).
>>>
>>>  when I write on /dev/fb0 the pinout data move.
>>>
>>>
>>>2. when I change the command line kernel by :
>>>video=pxafb:mode:640x480-1,passive,left:21,right:2,vsynclen:3,hsynclen:13
>>>  the pxafb doesn't work (no clock on pinout)
>>>
>>>I'm trying some other command line kernel configuration on pxafb, but
>>>nothing done (no clock and no data).
>>>
>>>I use gumstix-r457 source (with linux kernel 2.6.11).
>>>
>>>When I compile, i use the following option :
>>>In Graphics Support ->
>>>  enable:
>>>   Support for frame buffer device
>>>   Enable Video Mode Handling Helpers
>>>   PXA LCD framebuffer support
>>>   PXA LCD command line parameters
>>>
>>>Somebody has some ideas for what's wrong ??
>>>
>>>Thanks
>>>
>>>Cyrille
>>>      
>>>
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>
>  
>