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RE: [avr-gcc-list] AVR Studio and Hardware: results don't match. Anyclue
From: |
Gavin Jackson |
Subject: |
RE: [avr-gcc-list] AVR Studio and Hardware: results don't match. Anyclue? |
Date: |
Wed, 30 May 2007 09:02:07 +1200 |
How
are you determining 'time', are you converting your clock cycles into time based
on your clock frequency or are you allowing AVR Studio to calculate it for you?
If the latter is true have you told AVR Studio the correct clock frequency you
are using?
Since
you don't have proper hardware connected to port pins in the simulator you may
have software timeouts occurring in your application while waiting for external
hardware to respond. It's hard to give you a specific reason when there could be
so many things that influence your measurements.
Gavin
Jackson
-------------------------------------------
Research &
Development Engineer
Tru-Test Limited
PO Box 51078
Pakuranga
Manukau
2140
Auckland, New Zealand
DDI +64 9 978
8757
-------------------------------------------
Hello
everyone,
I've measured running time for a program in AVR Studio and also
in MICAz sensor node.
MICAz is featured w/ the ATmega128
microcontroler. However, the results I've got don't match. In reality, the
results in the simulator were much faster. I know that when loading software on
nodes other software is also loaded ( e.g. TinyOS). But, at least, they are not
supposed to interfere that much in the performance. Besides, the results I've
got in the simulator are twice as fast.
So my questions are
1) Is AVR
Studio an accurate simulator?
2) I also have the STK300 AVR JTAG ICE. If I
run the same program using both the board and the AVR Studio (by means of
the JTAG), will the clock cycles exhibit in the simulator be taken from the real
board? Or will they be the same of running the simulator alone?
Anyway,
I'm newbie concerning AVR platforms and I'd like to know how performance numbers
are usually measured in those devices. Any help would be much
appreciated.
Thanks in advance.
--
Cheers,
Leonardo
Alice:..wondering u could help me
find my way
Cat:It depends on where u want to get to
Alice: It really
doesn't matter, as long as...
Cat: So it really doesn't matter which way u go
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