Re: [OpenOCD-user] mem2array and array2mem problems

[Matthew B. <m.b...@sa...>]

Some debugging of this problem has revealed that this was a bug OpenOCD
0.7.0 that has been fixed in 0.8.0.

Probably by
https://gitorious.org/openocd/openocd/commit/d3c6a071e60bae1336de35a327f8963
b5435c3b0

Matthew Bentham

-----Original Message-----
From: Matthew Bentham [mailto:m.b...@sa...] 
Sent: 22 January 2014 17:01
To: ope...@li...
Subject: [OpenOCD-user] mem2array and array2mem problems

Hi,

I'm experiencing problems using mem2array and array2mem.  Hopefully I'm just
doing something silly due to my inexperience with tcl, so I hope someone can
help.  My problems can be summarised as: 

1) mem2array and array2mem do not behave symmetrically (my comments in
brackets):

Open On-Chip Debugger
> mdw 0x40000000
0x40000000: 00000000
> array set foo2 { 0 0 1 1 2 2 3 3 4 4 5 5 6 6 } echo $foo2
 0 0 1 1 2 2 3 3 4 4 5 5 6 6
> array get foo2
 0 0 1 1 2 2 3 3 4 4 5 5 6 6
> array2mem foo2 16 0x40000000 7
> mem2array foo3 16 0x40000000 7
(at this point I would expect foo2 and foo3 to be the same, but)
> echo $foo3
0 0 1 1 2 1 3 2 4 2 5 3 6 3
(and mdh agrees with mem2array, which makes me believe array2mem isn't
working the way I expect)
> mdh 0x40000000 7
0x40000000: 0000 0001 0001 0002 0002 0003 0003

md{b,w,h} and mw{b,w,h} are working as expected, so at least single-word
writes are working on my hardware.  Is my problem likely to be in my board
or cpu configuration or am I just misusing the tcl?

2) When using "$target_name mem2array" I can't retrieve the output:

> unset foobar
> echo $foobar
can't read "foobar": no such variable
> (my target name) mem2array foobar 16 0x40000000 1 echo $foobar
can't read "foobar": no such variable
> mem2array foobar 16 0x40000000 1
> echo $foobar
0 57005

How do I retrieve the array set by "(my target name) mem2array <var> <width>
<address> <nelems>"?

In case it makes a difference, I'm using:

> version
Open On-Chip Debugger 0.7.0 (2013-05-05-10:44)

Installed on Windows, connected via a USB->JTAG Olimex device to an emulator
of a custom chip using an ARM core.  I'm issuing these commands via a telnet
session to the default server port 4444.

Thanks in advance,

Matthew Bentham




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