Re: [Simulavr-devel] ATMega48 Crash

[Knut Schwichtenberg]

Michael N. Moran wrote:
> I don't see a connection. For example the HWMegaSpi member
> in the M128 and M48 are both pointers.
That's true. And yes it is definitely not related to this.

> I did not glean anything useful from the trace, though
> I have set my share of breakpoints in the AddToCycleList
> operation over the last few days :)
Okay, as you read from my error message I think I found the problem. I guess the
following: SPI-subsystem was tested with the at90s-CPUs which use the HwSpi
constructor. The M48 uses the HwMegaSpi. Currently I don't know the difference
in Hardware. In the simulator there is one. HwMegaSpi calls
core->AddToCycleList(this) while in HwSpi this call is commented out.

IMHO the CycleList contains all HW-subsystems that need an activity during a
cycle (not sure if it is a microcycle of 1ns or if it is a clock cycle). Anyway,
if the SPI is only added if the SPE bit is set it is process only than and that
brings performance. Therefore I expect the additional core->... is forgotten to
comment out.

But that does not explain while the spi-example does not generate this error. 
:-(

Knut