* AVR debugging - Can't read io register contents
@ 2015-11-30 13:25 Diogo Martins Silva
2015-11-30 13:36 ` Tristan Gingold
0 siblings, 1 reply; 2+ messages in thread
From: Diogo Martins Silva @ 2015-11-30 13:25 UTC (permalink / raw)
To: gdb
Hello.
I'm debugging an AVR software using an AVR Dragon - Avarice - avr-gdb -
Eclipse Toolchain in Ubuntu 15.10, with current packages.
While trying to read some register address (1284p's EICRA register at
0x69), I get all zeros. If I printf the register, the correct value is
printed. I know to have successfully altered the register because the
behavior of the micro changes accordingly.
Funny thing is I can correctly read every other register.
How do I pinpoint this? I'm not knowledgeable of gdb, so I appreciate
your help.
Diogo
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: AVR debugging - Can't read io register contents
2015-11-30 13:25 AVR debugging - Can't read io register contents Diogo Martins Silva
@ 2015-11-30 13:36 ` Tristan Gingold
0 siblings, 0 replies; 2+ messages in thread
From: Tristan Gingold @ 2015-11-30 13:36 UTC (permalink / raw)
To: Diogo Martins Silva; +Cc: gdb
> On 30 Nov 2015, at 14:24, Diogo Martins Silva <diogo.masilva@gmail.com> wrote:
>
> Hello.
>
> I'm debugging an AVR software using an AVR Dragon - Avarice - avr-gdb -
> Eclipse Toolchain in Ubuntu 15.10, with current packages.
>
> While trying to read some register address (1284p's EICRA register at
> 0x69), I get all zeros. If I printf the register, the correct value is
> printed. I know to have successfully altered the register because the
> behavior of the micro changes accordingly.
>
> Funny thing is I can correctly read every other register.
>
> How do I pinpoint this? I'm not knowledgeable of gdb, so I appreciate
> your help.
I would first do a ‘set debug remote 1’ to trace the remote protocol
and see whether the issue in within avarice or within gdb.
^ permalink raw reply [flat|nested] 2+ messages in thread
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