[ECOS] printf and diag_printf go to nowhere

Sergei Gavrikov sergei.gavrikov@gmail.com
Wed Apr 15 09:01:00 GMT 2009


On Wed, Apr 15, 2009 at 09:49:54AM +0200, Andrew Lunn wrote:
> On Wed, Apr 15, 2009 at 09:38:39AM +0200, Edgar Grimberg wrote:
> > Robert Brusa wrote:
> >>
> >> This little serial example program. Compiled, linked downloaded with  
> >> BDI all ok. But I can not start it with BDI/telnet go 0. Hell and  
> >> death - just before I did just this!
> > Are you sure that execution is supposed to start at address 0x0 ? If  
> > it's a ROM application, try go 0x00100000 (I believe that's the starting  
> > point for your target).
> > Also, another thing that might confuse you is the configuration script  
> > for BDI. It will set up the target CPU to a state that is different than  
> > the one you get without the BDI. When I write applications that are  
> > supposed to start up the board (ROM startup type), I use a stripped down  
> > version of the config file, that will not touch the configuration  
> > registers in the CPU.
> 
> Yes, it sounds like the BDI is remapped the memory. On a clean power
> on, without any JTAG debugger fiddling with things, ROM is mapped both
> at 0x0 and 0x00100000. The JTAG programmer i use, jumps in on reset
> and maps RAM to 0x0.

Robert, and then when you will manage your JTAG BDI config file and the
gears will become to spin I would suggest you to prepare an Expect
script for the BDI telnet prompt to automate things, add a rule in your
makefile and all things will become so simple as to type "make prog".
The link the below is just for a reference, what's possible to get using
Expect (it is just a demo)

http://sourceware.org/ml/ecos-discuss/2004-11/msg00262.html

if you again and again enter commands on any prompt, such a job is the
job for Expect. I use Expect too, but, with another programmer.


Sergei

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