From mboxrd@z Thu Jan  1 00:00:00 1970
From: Robin Farine <acnrf@dial.eunet.ch>
To: Andre Sebastien <sebastien.andre@sxb.bsf.alcatel.fr>
Cc: ecos-discuss@sources.redhat.com
Subject: Re: [ECOS] Question about Hello World eCos example
Date: Wed, 25 Jul 2001 07:38:00 -0000
Message-id: <86y9pd9iq7.fsf@halftrack.hq.acn-group.ch>
References: <9860C773D04D834D83FD6FAD00A61E930F2040@gctsemi.gctsemi.com> <3B5ED469.4A25761B@sxb.bsf.alcatel.fr>
X-SW-Source: 2001-07/msg00782.html

Andre Sebastien <sebastien.andre@sxb.bsf.alcatel.fr> writes:

[...]

> It s exactly that i try to print : printf("Hello, eCos world! %d \n",5);
> 
> PS: what is $0 and #BB at the beginning and the end of output ?

Not $0, but $O (O packet). The GDB protocol uses such packets to output text
non-related to GDB itself (e.g. your printf). The protocol also appends a
checksum to every packet, the #BB in your case.

> But never the program go out the function "printf", it seems to go in a
> infinite loop !!!!!  What does it wrong ?

It's waiting for an ack from the remote side of a GDB connection !!!!!

Try to set the option below in your ecos.ecc:

    cdl_component CYGDBG_HAL_DIAG_TO_DEBUG_CHAN {
        user_value 0
    };

[...]

Robin