On Thu, 6 Apr 2000, Peter Schneider wrote:
> My problem:
> If start rt-linux the DP-RAM memory at 0xB0800 - 0xB0AFF is filled with
> 0xFF.
> Now I start the stepper motor controller and fill the DP-RAM with 0x00.
> After e few minutes the rt-linux Kernel fill all even adress of the
> DP-RAM with 0x20.
> I don't know why?
> What function of the kernel is writing to the DP-RAM at 0xB0800?
I have seen that the range 0xA0000-0xFFFFF is not touched by the kernel. But
I think you will need to get virtual address using phys_to_virt(0xB0800) or
use {write,read}{b,w,l} functions.
Best regards,
--
Tomek
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