[ECOS] redboot problems

[jasmine kohli]

hi jeff,

thanks a lot for ur advice.
but i have a long way to go before i could emulate or
have a similar problem as u --- as i am still not able
to get Redboot up on my board.

can anyone suggest changes on what i could do ,to get
Redboot up on my board.

regards,
jasmine




--- Jeff Cooper <jeffc@logicpd.com> wrote:
> On Thursday 22 July 2004 09:42 am, jasmine kohli
> wrote:
> > i have a problem while trying to port Redboot to
> my
> > target board with MPC852T as the target processor.
> 
> ...
> 
> > the problem that when i try to bring up redboot on
> my
> > board, the code hangs in the call to the
> > set_debug_comm function by hal_if_init.
> > if i comment out set_debug_comm calls in
> hal_if_init,
> > it hangs in the call to the function
> > hal_plf_comms_init
> >
> > can anyone plz suggest where i could be going
> wrong .
> 
> I had a problem that sounds similar while working on
> a port to one of our card 
> engines (SH7760 processor).  What I found is that
> redboot would output fine 
> to the serial port, but when I tried to compile an
> application that used the 
> eCos kernel, the app would hang on initialization.
> 
> It turned out that counter being used as a basis for
> the delay calls hadn't 
> been started.  The cyg_hal_plf_scif_set_baud() call
> was calling a delay 
> macro.  When building for redboot, this macro ends
> up calling 
> hal_misc.c:hal_delay_us(), which properly starts the
> counter.  However, when 
> building a kernel, this macro calls
> hal_if.c:delay_us() which assumes the 
> counter is already running.
> 
> I ended up added code to my cyg_hal_plf_comms_init()
> for my HAL to start the 
> counter if building the kernel.
> 
> So you might want to look at the delay call for your
> processor and see if it's 
> acting like you expect it to.
> 
> Do you have an ICE for your processor?  If not, I'd
> recommend getting one if 
> you can, they're invaluable for tracking problems
> like this!
> 
> Good luck!
> -- 
> Jeff Cooper
> Senior Embedded Software Engineer
> jeffc@logicpd.com
> 612-436-5176
> 
> Logic Product Development
> 411 N. Washington Ave. Suite 101
> Minneapolis, MN  55401
> 
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