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Locating segments in HDATA by default

Jay Miller

Okay, I think this should be an easy one!

I have a program/data partition at 0x20000. I also have internal SRAM from 0-0x1300.

Without the 'Use internal SRAM' box checked, I get this config:

   XDATA (X:0x20000-X:0x2FFFF)
   HDATA (X:0x20000-X:0x2FFFF)
My data segments are all located past 0x20000 where they belong with this config but I can't access the internal SRAM!

When I check that box, this config results:

   XDATA (X:0x0-X:0x13FF)
   HDATA (X:0x0-X:0x13FF, X:0x20000-X:0x2FFFF)
.. and I get a whole bunch of L107: ADDRESS SPACE OVERFLOW errors because the LX51 seems to be trying to jam them all into XDATA instead of utilizing HDATA.

After checking out KB1647 (http://www.keil.com/support/docs/1647.htm), I also tried adding this to manually move them all to HDATA:

   SEGMENTS (?XD?* (X:0x20000))
.. but that just results in a whole bunch of L108: SEGMENT IN LOCATING CONTROL CANNOT BE ALLOCATED errors.

Any ideas on what I've missed?

Parents
  • 0 in reply to Jon Ward

    Heh, that does help as it doesn't seem like the stock dialog boxes are going to drop everything into place.

    The main problem, though, is that I'm not even sure of the customizations I need to apply!

    - My classes seem correct. As I pasted in my original post, above, I have a small XDATA class and a larger HDATA class (it can't be addressed as XDATA since it's out of XDATA's standard 16 bit range).

    - My segments do not seem correct and herein is the real trouble! They are all apparently being located off of that small XDATA class. Because it's so small this is a Bad Thing, and I'm not sure how to correct it.. as I mentioned, explicitly locating them doesn't seem to work.

    Any more thoughts are most welcome!

Reply
  • 0 in reply to Jon Ward

    Heh, that does help as it doesn't seem like the stock dialog boxes are going to drop everything into place.

    The main problem, though, is that I'm not even sure of the customizations I need to apply!

    - My classes seem correct. As I pasted in my original post, above, I have a small XDATA class and a larger HDATA class (it can't be addressed as XDATA since it's out of XDATA's standard 16 bit range).

    - My segments do not seem correct and herein is the real trouble! They are all apparently being located off of that small XDATA class. Because it's so small this is a Bad Thing, and I'm not sure how to correct it.. as I mentioned, explicitly locating them doesn't seem to work.

    Any more thoughts are most welcome!

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