Re: Gives Bus error in memcpy() in coping /dev/fb0 to a file.
From: "Antonino A. Daplas" <adaplas@gmail.com>
Date: 2007-03-09 08:52:47
On Fri, 2007-03-09 at 10:21 +0530, Vishal Soni wrote:
On Thursday 08 March 2007 18:35, Antonino A. Daplas wrote:quoted
On Wed, 2007-03-07 at 17:20 +0530, Vishal Soni wrote:quoted
[root@tw pcapp]# ./pcapp 1024x768, 16bpp framebuffer device mapped to memory @ 0xb7db3000. FB_FRAME mapped to memory @ 0xb7c33000. Bus errorI don't think vfb's framebuffer can be mmapped. It's fixable, but nobody seems to have a need for it, yet. Tonyfb is getting successfully mapped.. its just that memcpy gives bus error when i try to copy the mapped memory of framebuffer device to a "mapped file," Well, I am able to get the ball rolling by writing the mapped framebuffer onto the file by using write system call
Unless you modified vfb yourself, it's not possible because fix->smem_start is not set all (it's pointing to NULL). What's actually being mmapped is physical addres 0UL. Tony ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV