[Simulavr-devel] [support #102503] Mega8 Simulation or config problem?

[nobody]

Support Request #102503, was updated on Tue 10/07/2003 at 14:18
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Category: None
Status: Closed
Priority: 5
Summary: Mega8 Simulation or config problem?

By: troth
Date: Sun 11/02/2003 at 20:48
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Windows NT 5.1)

Two things come to mind.



First, you are trying access io registers that simulavr does

not yet simulate (which is most of them at this point). You

need to look at the address and see if it is an io register

that isn't handled yet. In that case, your program probably

won't run right in the simulator.



Second possibility is that you are trying to access memory

beyond the internal sram. This happened a lot with pre-6.0

versions of gdb since it had some flaws in keeping track of

the stack pointer. Should be fixed in gdb-6.0.





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By: khouser
Date: Tue 10/07/2003 at 14:18
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Hi everyone,



I've been trying to use simulavr with the GDB 

graphical interface included in WinAVR. I've 

successfully started simulavr simulating a Mega8, then 

connected to simulavr from the GUI, then started 

running my working Mega8 code. The problem is that I 

always get a message on the simulavr console window 

about an error reading memory location 0xnnnn from 

memory.c. Of course, the GUI is stopped while waiting 

for a response from the simulator. In the simulavr 

console window I can hit the enter key and then I get 

the same error message with the next address. If I hit 

enter long enough, sometimes the GUI gdb frontend will 

respond again. 



Any ideas on what could be setup incorrectly? Or is 

the Mega simulation incomplete? My target code works 

well in actual hardware and from within VMLab.



Thanks for your help,



Kevin

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