[ECOS] Frequency scaling and serial interface...

[ECOS] Frequency scaling and serial interface...

[Cristiano Ligieri Pereira]

Hi all,

I have an application in which I'm scaling the frequency of compaq ipaq.
I'm also sending messages to GDB (via serial) in order to debug my code. I
can scale the frequency from any level to any level without any problem
for a while and I verify it by means of messages on the console.
Sometimes, however, after a while (10 minutes or more) I either stop
receiving messages on the console or I receive the following message:

"gdb_config:4: Error in sourced command file:
 Reply contains invalid hex digit -2"

I'm assuming that my application is crashing and I've been trying to
modify it for a fews two days without any change in the output (i.e,
unsuccessfully :-( ). Looking carefully in the SA-1110 developer's Manual
I've noticed that changing the core frequency makes the LCD controller,
all serial controllers, the DMA controller and the OS timer to stop.
^^^^^^^^^^^^^^^^^^

Now I'm wondering if the messages are not coming due to this 'stop' in the
serial controller and consequently my application is not actually crashing
(which is gonna be great) but only the communication IPAQ/HOST is being
stopped. Is is possible? I mean, is this a reasonable explanation? If so,
does anyone have a suggestion on how to get away from this problem?

Thanks,
Cristiano.

------------------------------------------------------------
Cristiano Ligieri Pereira - http://www.ics.uci.edu/~cpereira