Re: [Simulavr-devel] Fix for SPI Example

[Michael N. Moran]

Jennifer Averett wrote:
> I verified the spidata files matched between the spi test
> spidata file ran the atmega48 and the atmega48 spidata
> file.  Then ran the atmega48 test.  I got better results
> but they still didn't match the README in the atmega48
> test directory.  

Hmmm. My results are considerably different for
examples/atmega48.

> I attached a copy of the output produced
> over several seconds.  

I notice that you are using a different method of
invoking the simulation. I am invoking the check.tcl
script directly.

./check.tcl

> As you can see I am get occasional
> changes in the data but the values don't look correct.

I can't argue with that ;)

My atmega48 example seems to be working fine.

My spi example does not work. After playing with
it a bit, I find that the SPI interrupt is never
being called. The result is that the MISO pin (B3)
is *never* changing and thus I get all zeros printed
from the SpiSink, since the SpiSink *does* see SS and SCK
that are generated by SpiSource.

Thus, it seems there is something wrong with:

1) The SPI test code main.cpp. Perhaps a bad configuration?
2) The simulated Atmega128 SPI implementation/configuration.
3) The simulated Atmega128 interrupt implementation.
4) Something I haven't thought of (most likely ;)

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