how to use large memory(0x001700) of tms320f28035

Submitted by balaji on Thu, 02/18/2010 - 07:41
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Hi... I have an application code with 2805_RAM_Lnk.Cmd file. I allocated like this...

Page0:
RAML1L2L3 : origin = 0x008850, length =0x001700
Page1:
RAML0 : origin = 0x008000, length = 0x000800
.text : > RAML1L2L3, PAGE = 0
.ebss : > RAML0, PAGE = 1
.econst : > RAML0, PAGE = 1
.esysmem : > RAML0, PAGE = 1

while loading .out file i am getting following error...

"Load failed" with pop up message

and

"Trouble Writing Memory Block at 0x8850 on Page 0 of Length 0x1336: Cannot access memory address 0x9000"

Kindly help me to come out from this issue....

‹ I have a big 12,000 block diagram that uses 2k of heap on the F2808. How can I increase available heap? How to generate sine wave using F28335 ›
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We have no such problems with VisSim

Submitted by Anders89 on Fri, 02/19/2010 - 10:54.

I suggest you use VisSim or contact TI tech support. VisSim has no problems with CCS v3.3 and F28035. In fact, we can run 2 concurrent sensorless field oriented PMSM motor controls with 4 200-element signal buffers all in RAM on the F28035.

Ans: Yes ,i am using

Submitted by balaji on Thu, 02/18/2010 - 21:54.

Ans: Yes ,i am using CCS3.3.....

Looks like you're not using VisSim

Submitted by Anders89 on Thu, 02/18/2010 - 10:05.

Hi Balaji, From your .cmd file it looks like you aren't using VisSim. In any case, there are several problems that I see.

  • 0x9000 is writable on the F28035, but not on F28027. Are you sure you have an F28035?
  • You are wasting 0x100 words in your allocation
  • Consider using M0M1 as Page 1 alloc as VisSim does. This will give you more RAM for program/.text
  • Consider using Vissim, it will greatly speed up your development.

Ans: Yes ,i am using

Submitted by balaji on Thu, 02/18/2010 - 22:34.

Ans: Yes ,i am using CCS3.3.....
* 0x9000 is writable on the F28035, but not on F28027. Are you sure you have an F28035?
Ans: Yes...I have an TMS320F28035

  • You are wasting 0x100 words in your allocation

Ans: even if i allocate full length i.e.

Page0:
RAML1L2L3 : origin = 0x008850, length =0x0017B0

Then also i am getting same problem....

  • Consider using M0M1 as Page 1 alloc as VisSim does. This will give you more RAM for program/.text

Ans: see my command file...

PAGE 0 : BEGIN : origin = 0x000000, length = 0x000002
RAMM0 : origin = 0x000050, length = 0x0003B0
PRAML0L1L2L3 : origin = 0x008000, length = 0x002000
RESET : origin = 0x3FFFC0, length = 0x000002
IQTABLES : origin = 0x3FE000, length = 0x000B50
IQTABLES2 : origin = 0x3FEB50, length = 0x00008C
IQTABLES3 : origin = 0x3FEBDC, length = 0x0000AA
BOOTROM : origin = 0x3FF27C, length = 0x000D44
PAGE 1 :
BOOT_RSVD : origin = 0x000002, length = 0x00004E
RAMM1 : origin = 0x000480, length = 0x000380
DRAML0 : origin = 0x3F8000, length = 0x000800
}

SECTIONS
{
codestart : > BEGIN, PAGE = 0
ramfuncs : > RAMM0 PAGE = 0
.text : > PRAML0L1L2L3, PAGE = 0
.cinit : > RAMM0, PAGE = 0
.pinit : > RAMM0, PAGE = 0
.switch : > RAMM0, PAGE = 0
.reset : > RESET, PAGE = 0, TYPE = DSECT
.stack : > RAMM1, PAGE = 1
.econst : > RAML2, PAGE = 1
.ebss : > DRAML0, PAGE = 1
.econst : > DRAML0, PAGE = 1
.esysmem : > DRAML0, PAGE = 1
IQmath : > PRAML0L1L2L3, PAGE = 0
IQmathTables : > IQTABLES, PAGE = 0, TYPE = NOLOAD
}
 error:Trouble Writing Memory Block at 0x8000 on Page 0 of Length 0x1331: Cannot access memory address 0x9000

Your problem is two-fold

Submitted by Anders89 on Thu, 02/18/2010 - 23:57.

1) You should be using VisSim, then you would not have this problem
2) You are using DRAMLO at origin 0x3F8000, but this is a dual mapped memory that overlaps PRAML0L1L2L3 at origin = 0x008000

I modified command file....again facing same problem

Submitted by balaji on Fri, 02/19/2010 - 03:27.

PAGE 0 :

BEGIN : origin = 0x000000, length = 0x000002

RAMM0 : origin = 0x000050, length = 0x0003B0

PRAML0L1L2L3 : origin = 0x008000, length = 0x001700

RESET : origin = 0x3FFFC0, length = 0x000002

IQTABLES : origin = 0x3FE000, length = 0x000B50

IQTABLES2 : origin = 0x3FEB50, length = 0x00008C

IQTABLES3 : origin = 0x3FEBDC, length = 0x0000AA

BOOTROM : origin = 0x3FF27C, length = 0x000D44

PAGE 1 :

BOOT_RSVD : origin = 0x000002, length = 0x00004E

RAMM1 : origin = 0x000480, length = 0x000380

DRAML0 : origin = 0x009800, length = 0x000800

}

SECTIONS { codestart : > BEGIN, PAGE = 0

ramfuncs : > RAMM0 PAGE = 0

.text : > PRAML0L1L2L3, PAGE = 0

.cinit : > RAMM0, PAGE = 0

.pinit : > RAMM0, PAGE = 0

.switch : > RAMM0, PAGE = 0

.reset : > RESET, PAGE = 0, TYPE = DSECT

.stack : > RAMM1, PAGE = 1

.econst : > RAML2, PAGE = 1

.ebss : > DRAML0, PAGE = 1

.econst : > DRAML0, PAGE = 1

.esysmem : > DRAML0, PAGE = 1

IQmath : > PRAML0L1L2L3, PAGE = 0

IQmathTables : > IQTABLES, PAGE = 0, TYPE = NOLOAD

}

error:Trouble Writing Memory Block at 0x8000 on Page 0 of Length 0x1331: Cannot access memory address 0x9000