Try to move some global variables to external RAM if possible.
Or maybe locating few arrays in idata.
--
Ori Idan
On Tue, Sep 9, 2008 at 1:02 PM, Jesse Lackey <[EMAIL PROTECTED]>wrote:
> Hello all, until today I've been happily developing a sizable project
> with the TI CC2430 with SDCC.
>
> Suddenly I have a problem I don't understand. A linker error:
>
> "?ASlink-Error-Could not get 30 consecutive bytes in internal RAM for
> area DSEG"
>
> I'm guessing it has something to do with stack space, since it happened
> after moving some functions around and increased the stack depth.
>
> I've made globals out of some of the locals in these functions, no help.
>
> I use a divide in the function, dividing an unsigned 32bit by an
> unsigned 8bit, and if I comment them out then lo and behold no problem.
> Does this mean I need to recompile some sdcc libraries with
> --model-large? I've been doing that divide for weeks, so I'm guessing
> that some kind of precious, limited RAM has been in use for calls to the
> divide function and now there isn't room anymore.
>
> Compiler arguments I use:
> --model-large
> and linker:
> --model-large --xram-loc 0xE000 --xram-size 8192 --code-size 32768
>
> Attached is the .mem file generated.
>
> This is kind of an emergency as this project is behind schedule and
> almost ready to go, and people are waiting with specialized test
> environments to run this board.
>
> So any help/explanation is greatly, greatly appreciated. I didn't find
> an explanation of what DSEG is in the sdcc docs.
>
> If I need to recompile sdcc libraries, getting a link to documentation
> on how to do this be most appreciated.
>
> Thanks in advance.
> Jesse
>
>
>
> Internal RAM layout:
> 0 1 2 3 4 5 6 7 8 9 A B C D E F
> 0x00:|0|0|0|0|0|0|0|0|c|d|d|d|d|d|d|Q|
> 0x10:|Q|Q|Q|Q|Q|Q| | | | | | | | | | |
> 0x20:|B|B|a|a|a|a|a|a|a|a|a|a|a|a|a|a|
> 0x30:|a|a|a|a|a|a|a|a|a|a|a|a|a|b|b|b|
> 0x40:|b|b|b|b|b|b|b|b|b|b|b|b|b|b|b|b|
> 0x50:|b|b|b|b|b|b|b|b|b|b|b|b|b|b|b|b|
> 0x60:|b|b|b|S|S|S|S|S|S|S|S|S|S|S|S|S|
> 0x70:|S|S|S|S|S|S|S|S|S|S|S|S|S|S|S|S|
> 0x80:|S|S|S|S|S|S|S|S|S|S|S|S|S|S|S|S|
> 0x90:|S|S|S|S|S|S|S|S|S|S|S|S|S|S|S|S|
> 0xa0:|S|S|S|S|S|S|S|S|S|S|S|S|S|S|S|S|
> 0xb0:|S|S|S|S|S|S|S|S|S|S|S|S|S|S|S|S|
> 0xc0:|S|S|S|S|S|S|S|S|S|S|S|S|S|S|S|S|
> 0xd0:|S|S|S|S|S|S|S|S|S|S|S|S|S|S|S|S|
> 0xe0:|S|S|S|S|S|S|S|S|S|S|S|S|S|S|S|S|
> 0xf0:|S|S|S|S|S|S|S|S|S|S|S|S|S|S|S|S|
> 0-3:Reg Banks, T:Bit regs, a-z:Data, B:Bits, Q:Overlay, I:iData,
> S:Stack, A:Absolute
>
> ERROR: Couldn't get 30 bytes allocated in internal RAM for area DSEG.
> Stack starts at: 0x63 (sp set to 0x62) with 157 bytes available.
>
> Other memory:
> Name Start End Size Max
> ---------------- -------- -------- -------- --------
> PAGED EXT. RAM 0 256
> EXTERNAL RAM 0xe000 0xe8f7 2296 8192
> ROM/EPROM/FLASH 0x0000 0x7686 30343 32768
>
>
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