[avr-gcc-list] SPM Problem

[Tom Maughan]

I've got an odd problem.   I'm porting some code from IAR to GCC and have 
hit a brick wall.

All the C works BUT we have some assembler to reprogram the internal 
flash.   With the IAR it works just fine, with the GCC it hangs the moment 
it executes the SPM instruction after loading the SPMCR with 0x03 (erase).

The code is the same, its locating it in the correct place (1F800), its 
calling it correcly, its just not working.

We have alot of other assembly routines that work correctly.

I've replaced the IAR 'DW' with '.word' but I have not changed the 
parameter register numbers.   The programming sequence is entirely assembly 
and is called by  void program_flash(void) and then each assembler function 
sets the correct registers before calling the next so I cannot see how 
changing from R18 etc.. to R24 etc.. would make a difference.

Anyone else had issues with SPM?

Many thanks!

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