[fpc-devel] fpc AVR32
Jeppe Græsdal Johansen
jjohan07 at student.aau.dk
Wed Oct 24 21:22:23 CEST 2012
Den 24-10-2012 21:16, Michel Catudal skrev:
> Le 24/10/2012 14:50, Jeppe Græsdal Johansen a écrit :
>> Are you using the code from branches/laksen/avr32new or something older?
>> And have you managed to fixed the non-aligned access bugs, that was
>> where I got stuck?
> I took the code from that new one. I am just starting. My first task
> was to port to some devices I have and have a binary to work with. One
> thing that I found annoying was that the makefiles do not seem to know
> about the fact that the compiler may be a 64 bit compiler.
> I have several uc3c0512 and uc3c1512 plus an evaluation board.
> The evaluation board for the uc3b0256es has very few features, not
> quite as fancy as the one for the automotive part.
> I have not looked at the non-aligned access bugs yet but will do in
> time. First I have to have something that I can debug on one of my
> evaluation boards.
> On the subject, the alignment is for word or dword access. You cannot
> access a word in the middle, you will get a trap interrupt. Byte
> access shouldn't be an issue.
> In which case are you having the issue with non alignment? so I will
> know which function to look at.
PC relative word loads aren't aligned automatically, and due to the
variable instruction length such an instruction might end up on a
halfword boundary. I have no clue how to fix it in a simple way. LDDPC
has a very small allowable offset
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