Re: [uCsimm] RT-Fifo problem

From: D. Peter Siddons (
Date: Wed Jan 10 2001 - 09:01:15 EST

Hi David,
    I asked a similar question a few days ago. In my case I started
with 2.0.38, applied pre7 patches and then applied
which I got via this list. Everything went smoothly, and I was able to
the parallel example immediately. I then tried to build 'frank'. In my
the rtf devices were not made by any of the steps above so I made them
by hand
(character type, major 150, minor 0-7). I get the same behaviour as you.
haven't gotten back to it again yet.

Pete Siddons

David wrote:
> Hi,
> I have installed the RTLinux patches to the uCsimm and was trying to execute
> the examples.
> The frank example compiles right (except for a warning of an implicit
> declaration of 'memset' which i don't think it's a serious problem). But when i
> try to execute it in the uCsimm, i am given the error 'Invalid Argument' when
> trying to open the node /dev/rtf1 (the same happens with the other ones...). I
> think that the nodes are created properly (major=150, minor=1..n).
> I must be missing something when installing the patches, maybe... The process
> i'm following is this:
> - Install a clean linux-2.0.38 kernel.
> - Apply 1pre1 patch.
> - Apply RTL0.9J-uClinux.1pre1rt patch
> - Apply patch3 (the one that changes major to 150)
> and recompile the kernel with the right options.
> Don't know if the cross-compilers must be recompiled too, or the libm and libc
> must change in any way... or whatever...
> The parallel example won't compile in any way. It must be a problem in
> rt_time.h. Definition of 'struct timespec' doesn't seem to be in that file and
> is missing...
> Hope that someone can help me.
> Regards,
> David
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