Re: [avr-gcc-list] Setting pin to high in function instead of main, instructions in main never run?

[Richard Zetterberg]

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Thanks for the input Georg-Johann and Johannes.

Georg-Johann: I double checked the fuses and the watchdog is not active.

Johannes: I'm not sure how I would go about doing that. But I just
read a document called "Getting started with GCC for AVR32" and found
the following:

"The linking process needs information about code and data memory
location. Using a linker script provides this. If specifying which
device you are compiling code for by using the ?-mpart=<part>? option
in avr32-gcc, a default linker script for that device will be used."

That got me thinking, maybe that's the problem, that I don't provide
the mmcu when linking. So I changed this line in the makefile:

elf:
        avr-gcc example.o -o example.elf

To this:

elf:
        avr-gcc -mmcu=atmega328 example.o -o example.elf


And after I compiled, linked, hexed and upload the problem was no
longer present.

With my no-existing experience I conclude that's the source of the
problem, and thus the problem is solved.

Does that make sense or is that just a coincidence that it is now
working?

On 3/1/12 3:30 PM, Georg-Johann Lay wrote:
> 
> You are sure there is no watchdog active?
> 

On 3/1/12 3:24 PM, Johannes Bauer wrote:
> 
> Why don't you include the whole program assembly (i.e. after
> linking), but only compile units? This would also show the startup
> code, where a fault in setting up the stack pointer would be
> visible (i.e. would cause the "call" to fail and therefore
> resetting the MCU instead of the behavior you desire).
> 
> Best regards, Joe
> 
> _______________________________________________ AVR-GCC-list
> mailing list address@hidden 
> https://lists.nongnu.org/mailman/listinfo/avr-gcc-list
> 

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