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bkamen
Joined: 07 Jan 2004
Posts: 1611
Location: Central Illinois, USA
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| #org and getenv("program_memory") |
 Posted: Mon Jul 06, 2009 5:53 pm |
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OK, so I have a bootloader that works great IF I manually assign the range for the Main.
like a lot of people here, I've used the CCS example (which I wish was a little better commented to explain all the #org statements to control the code placement... and WHY) with pretty good success.
I'm still stuck defining the range END with a hard number instead of using the GETENV("PROGRAM_MEMORY") command because it complains...
So to better understand (and yes, I RTFM'd), I thought I would ask the group here.
I'm currently using an 18F97J60. It has 0x1FFF8 of memory. (as reported by CCS) and MPLAB shows me a ROM window that does go from 0x00000 to 0x1FFF6.
So that makes sense. I'm not using ICD mode. So I should have ALL my memory. But it doesn't work.
| Code: |
--- Info 300 "bootloader.c" Line 40(1,2): More info: Segment at 00000-000FE (0000 used)
--- Info 300 "bootloader.c" Line 40(1,2): More info: Segment at 00100-00108 (0000 used) Priv
--- Info 300 "bootloader.c" Line 40(1,2): More info: Segment at 0010A-007FE (0000 used) Priv
--- Info 300 "bootloader.c" Line 40(1,2): More info: Segment at 00800-0FFFE (0000 used)
--- Info 300 "bootloader.c" Line 40(1,2): More info: Segment at 10000-1FFF6 (0000 used)
--- Info 300 "bootloader.c" Line 40(1,2): More info: Attempted to create: 00800-1FFF6 for #org
*** Error 126 "bootloader.c" Line 40(1,2): Invalid ORG range
1 Errors, 0 Warnings.
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If I put in an application end address of 0xFFFF, no problem (hard coded).
But if I used an end address of 0x10000, kablooey.
Now, the .H file for this device says 65535x16 (which would be 0xFFFF)... I don't think I'm supposed to divide by 2!
Is this a bug or am I doing something wrong?
Thanks!
-Ben
_________________
Dazed and confused? I don't think so. Just "plain lost" will do. :D |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Mon Jul 06, 2009 7:07 pm |
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See my post about 2/3 of the way down this thread, where I explain
how #org only works for a maximum of 64KB. If you want to #org a
larger range than that, then you need to use two #org statements:
http://www.ccsinfo.com/forum/viewtopic.php?t=31941 |
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bkamen
Joined: 07 Jan 2004
Posts: 1611
Location: Central Illinois, USA
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| Posted: Mon Jul 06, 2009 7:43 pm |
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Innnteressstttiiinnnggg...
Thanks.. Sorry for the Dup Post (sometimes search doesn't help - so I went with a subject line that hopefully rings up the next time someone searches)
-Ben
_________________
Dazed and confused? I don't think so. Just "plain lost" will do. :D |
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bkamen
Joined: 07 Jan 2004
Posts: 1611
Location: Central Illinois, USA
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| Posted: Mon Jul 06, 2009 8:00 pm |
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Ok, I tried that...
My dual #org is for app memory...
so I have:
| Code: |
// ==============================================================
// This places bogus application at 800
// that gets overwritten when the real application is loaded into memory.
//
// #org APP_ADDR,APP_END // 0x800 to end of memory
#org APP_ADDR, 0x0FFFF
#org 0x10000, ROMSIZE
void application(void) {
fprintf(COMM, "No Application to Run\r\n");
}
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and I get
Executing: "C:\Program files\Picc\CCSC.exe" +FH "bootloader.c" +DF +LY +T +A +M -Z +Y=9 +EA
*** Error 71 "bootloader.c" Line 109(1,2): Out of ROM, A segment or the program is too large @const554
Seg 0001E-000FE, 0032 left, need 003A
Seg 00100-00108, 000A left, need 003A
Seg 0010A-007FE, 06F6 left, need 003A
Seg 00800-0FFFE, F800 left, need 003A
Seg 10000-1FFF6, FFF8 left, need 003A
Seg 00000-00006, 0004 left, need 003A
Seg 00008-0001C, 0016 left, need 003A
1 Errors, 0 Warnings.
where just using #org APP_ADDR, APP_END worked just fine.
-Ben
_________________
Dazed and confused? I don't think so. Just "plain lost" will do. :D |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Tue Jul 07, 2009 12:54 am |
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The example in the link is using #org to reserve a ROM address range
for the application program. That requires putting braces {} after
the #rom range values. You don't have that.
http://www.ccsinfo.com/forum/viewtopic.php?t=31941&start=5
The link is about the Codeloader bootloader. I don't know if this applies
to your bootloader. You need to decide if it does. |
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bkamen
Joined: 07 Jan 2004
Posts: 1611
Location: Central Illinois, USA
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| Posted: Tue Jul 07, 2009 1:00 am |
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all {} does is reserve the area with nothing. I shouldn't need to do that if I just want to write to that block area.
Although I did try it with and without the {}'s with similar (I think same) results.
I'll toast by brain on it some more tomorrow. yay.
-Ben
_________________
Dazed and confused? I don't think so. Just "plain lost" will do. :D |
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