RE: [ECOS] i386 platform !

[Jean-François Mullet <jf dot mullet at arcale dot net>]

Hi Gary,

The connection between the host and the target is OK because I can upload the application using tftp and run it without any problem. 

Here is a screenshot of host console (I do not have serial port):

(gdb) set debug remote 1
(gdb) target remote 192.168.0.10:9000
Remote debugging using 192.168.0.10:9000
Sending packet: $Hc-1#09...putpkt: Junk: RedBoot>
Ack
Packet received: OK
Sending packet: $qC#b4...Ack
Packet received: E02
Sending packet: $qOffsets#4b...Ack
Packet received:
Sending packet: $?#3f...Ack
Packet received: S05
Sending packet: $Hg0#df...Ack
Packet received: OK
Sending packet: $g#67...Sending packet: $g#67...Sending packet: $g#67...Sending
packet: $g#67...Timed out.
Timed out.
Timed out.
Ignoring packet error, continuing...
Bad register packet; fetching a new packet
Timed out.
Timed out.
Timed out.
Ignoring packet error, continuing...
Bad register packet; fetching a new packet
Timed out.
Timed out.
Timed out.
Ignoring packet error, continuing...
Bad register packet; fetching a new packet
Timed out.
Timed out.
Couldn't establish connection to remote target
Remote communication error: Connection reset by peer.

Concerning the x86 as an embedded CPU I do agree with you in a general case but the board I'm using is a fanless PC-104 powered by a STPC Elite. 
PC104 consortium: http://www.pc104.org/. 
It's far away from a recent powerpc but I do not plan to implement any "fat" algorithm. I'm using this kind of board to take advantage of extension boards. The extension bus is based on the PC ISA bus which is obsolete in general case; I may change architecture when the concept will be validated. I will then perhaps try a more eCos conventional CPU ;-).

JF

-----Message d'origine-----
De?: Gary Thomas [mailto:gary@mlbassoc.com] 
Envoyé?: Friday, November 12, 2004 23:40
À?: Jean-François Mullet
Cc?: Andrew Lunn; ecos-discuss@sources.redhat.com
Objet?: RE: [ECOS] i386 platform !

On Fri, 2004-11-12 at 15:36, Jean-François Mullet wrote:
> Hi Andrew,
> 
> I can build an image without any problem; I just cannot connect to it with gdb. 
> I've tested eCos versions (randomly) from two years ago till the last version 
> on CVS and I've never been able to connect with gdb.
> Sometimes the toolchain is not compatible with the eCos source code (compilation 
> options...) but the error is obvious and an update is easy and fast. 

Are you sure you have communication between your host and the target
board?  e.g. you should be able to connect to the target via a serial
connection using something like minicom (Linux) or hyperterm (Windows).
Set the baud rate, etc.  You should get the RedBoot prompt.  Then to
test the GDB connection, try typing this: $g#67  You won't see anything
get echoed, but you should see some characters come back on the 
terminal.  If that works, you should be able to get into gdb.

Once you know the basic communication is working, try this:
* run GDB on the host
(gdb) set remotebaud 38400
(gdb) set remotedebug 1
(gdb) tar rem /dev/ttyS0     (on Linux)
(gdb) tar rem com1           (on Windows)

Let us know if this doesn't help.

> 
> It would be nice to know on which platform people are using eCos.
> It seems that x86 is not the most used according the number of 
> relative questions on the mailing list.

Indeed - the x86 is not really an embedded platform :-)  Most eCos 
platforms are based on PowerPC, ARM or MIPS embedded processors.

> 
> JF
> 
> -----Message d'origine-----
> De : Andrew Lunn [mailto:andrew@lunn.ch] 
> Envoyé : Friday, November 12, 2004 16:01
> À : Jean-François Mullet
> Cc : ecos-discuss@sources.redhat.com
> Objet : Re: [ECOS] i386 platform !
> 
> On Fri, Nov 12, 2004 at 02:45:30PM +0100, Jean-Fran?ois Mullet wrote:
> > Hi,
> > 
> 
> > I'm trying to setup a redboot image to accept remote gdb debug on
> > i386 target (which is supposed to be really easy !).
> >
> > The only working configuration have been able to use is the prebuild
> > version actually in CVS which is more than 2 years old.
> >
> > Any other prebuild version or any version I can build whatever the
> > ecos, cygwin and toolchain version I'm using is not accepting gdb
> > remote connection.
> 
> How are you building it. I just built one:
> 
> lunn@londo:~/eCos/work2$ ecosconfig new pc redboot
> U CYGSEM_HAL_USE_ROM_MONITOR, new inferred value 0
> U CYGIMP_HAL_COMMON_INTERRUPTS_USE_INTERRUPT_STACK, new inferred value 0
> lunn@londo:~/eCos/work2$ ecosconfig import ../anoncvs-clean/packages/hal/i386/pc/current/misc/redboot_FLOPPY.ecm 
> U CYGHWR_HAL_I386_FPU_SWITCH_LAZY, new inferred value 0
> lunn@londo:~/eCos/work2$ ecosconfig tree 
> lunn@londo:~/eCos/work2$ make -s
> headers finished
> /home/lunn/eCos/anoncvs-clean/packages/devs/eth/intel/i82559/current/src/if_i82559.c: In function `i82559_start':
> /home/lunn/eCos/anoncvs-clean/packages/devs/eth/intel/i82559/current/src/if_i82559.c:1664: warning: implicit declaration of function `memset'
> /home/lunn/eCos/anoncvs-clean/packages/devs/eth/intel/i82559/current/src/if_i82559.c: In function `i82559_recv':
> /home/lunn/eCos/anoncvs-clean/packages/devs/eth/intel/i82559/current/src/if_i82559.c:2135: warning: implicit declaration of function `memcpy'
> /home/lunn/eCos/anoncvs-clean/packages/devs/eth/intel/i82559/current/src/if_i82559.c: At top level:
> /home/lunn/eCos/anoncvs-clean/packages/devs/eth/intel/i82559/current/src/if_i82559.c:2712: warning: `eth_dsr' defined but not used
> /home/lunn/eCos/anoncvs-clean/packages/hal/common/current/src/hal_stub.c: In function `handle_exception_cleanup':
> /home/lunn/eCos/anoncvs-clean/packages/hal/common/current/src/hal_stub.c:457: warning: comparison between pointer and integer
> /home/lunn/eCos/anoncvs-clean/packages/redboot/current/src/fs/disk.c: In function `find_dos_partitions':
> /home/lunn/eCos/anoncvs-clean/packages/redboot/current/src/fs/disk.c:94: warning: unused variable `tmp'
> build finished
> 
> I don't have an i386 board to test it with, but it seems to compile OK
> except for some warnings.
> 
>         Andrew
-- 
Gary Thomas <gary@mlbassoc.com>
MLB Associates





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