[AVaRICE-user] [ avarice-Patches-1667981 ] IDR (OCDR) support

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Patches item #1667981, was opened at 2007-02-24 20:05
Message generated for change (Settings changed) made by joerg_wunsch
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Category: New Feature
Group: None
>Status: Pending
>Resolution: Out of Date
Priority: 5
Private: No
Submitted By: Shaun Jackman (tsirc)
>Assigned to: Joerg Wunsch (joerg_wunsch)
Summary: IDR (OCDR) support

Initial Comment:
The attached short patch enables support for the I/O Debug Register
(IDR). The result is that any byte written to the On-chip Debug
Register (OCDR) will appear on stdout of the avarice process. Other
options exist, such as sending a `O' console-output packet to GDB, but
I prefer stdout. Following is an example of how to use this feature
with avr-libc.

Cheers,
Shaun

#include <avr/io.h>
#include <stdio.h>

static int ocd_putchar(char c, FILE *stream)
{
       (void)stream;
       while (OCDR & 1<<IDRD);
       OCDR = c;
       return 0;
}

int main()
{
       static FILE ocdout = FDEV_SETUP_STREAM(ocd_putchar, NULL,
                       _FDEV_SETUP_WRITE);
       stdout = &ocdout;
       puts("Hello, world!");
       return 0;
}


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>Comment By: Joerg Wunsch (joerg_wunsch)
Date: 2008-05-26 13:54

Message:
Logged In: YES 
user_id=1097648
Originator: NO

This has been obsoleted with the user-configurable ICE event
handling as of revision 1.8 of src/jtag2run.cc.  The major
difference now is that a user break to the debugger is
synthesized upon receiving an IDE dirty event.  Would it make
more sense to just continue looping for further events in that
case?  The current solution appears to be a bit more flexible
to me (because the code could contain "controlled break to
debugger" statements) but it's slower in case you just want
to continue.

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