On 08-06-12 14:37, Jeppe Græsdal Johansen wrote:
Den 08-06-2012 14:28, Ludo Brands skrev:
Thanks Ludo,
I'll take that as a starting point. I hope I will not need the "lost"
256 bytes in the future.
I could be wrong but AFAIK if the compiler would do the alignment, the
loss
can also be up to 255 bytes. Here you lose 256 bytes in all cases.
Yes, but this would allow the linker to place other stuff there which
fits in less than 255 bytes.
Wasting 255 bytes is a lot on systems that only has a few kilobytes of
RAM. I wonder if the restriction of 32 bytes on the align directive
could just be removed, or will we need some sort of linker script changes?
Hi,
I'm still struggling to get interrupts (or even inputs) work but I
wanted to comment on the size of the table. Reading the manuals I found
it's actually on a 512 byte boundery. The VTOR (Vector Table Offset
Register) masks off the last 9 bits (8..0).
If I need that space I will modify the start of RAM location and use the
first bytes of RAM for the vector-table.
It would be nice to have "external" linker scripts. That way you could
more easily add processors, or use custom bootloaders.
Regards,
Koenraad Lelong.
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