Re: How to use ISRAm as a frame buffer in Linux

["Antonino A. Daplas" <adaplas@gmail.com>]

Prakhar Vig wrote:
> Hi Antonino,
>  
> I tried reading the data from framebuffer using cat as u have told, I
> wrote the following command:
>  
> cat /dev/fb0 > image.txt
>  
> Is the command correct or not, as I am getting some corrupted data......
> Below is the some part of data, which I am getting:
>  
> W<8d>õ<8c>^U<8d>Ã<8c><8c>c<86>2^D"é^Yí2Ã*uC[\<9c>dÃ^\m^\u]u|}\}}}<9d><85>^?<8^?<85>¿<8d>Ã<8d>þ<95>Ã<95>ý<95>ý<95>ÿ<9d>ÿ<9d>^_<9e>^_<9e>^_<9e>?<9e>><9e>9d><98>Â¥p
> 
>  
> And could you please tell me how to get the RGB data from framebuffer.
>  

What you get is raw framebuffer format.  If you 'cat image.txt > /dev/fb0',
you'll get the same image you dumped previously. 

In order for it to be read by an image viewer, you have to convert it
into a standard format.

Try searching for fbshot or fbgrab and look at the source.

Tony


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