How copy functions of IQMath and library F280xDRV_ml.L28 to ram and run in ram?Ple help,Emergency!

1. Add the file DSP280x_MemCopy.c to your project

2. Insert the global prototypes:

   - void MemCopy(Uint16 *SourceAddr, Uint16* SourceEndAddr, Uint16* DestAddr);
   - extern Uint16 RamfuncsLoadStart;
   - extern Uint16 RamfuncsLoadEnd;
   - extern Uint16 RamfuncsRunStart;

3. Add the following to your linker command file

SECTIONS
{
ramfuncs : LOAD = FLASHD,
RUN = RAML0,
LOAD_START(_RamfuncsLoadStart),
LOAD_END(_RamfuncsLoadEnd),
RUN_START(_RamfuncsRunStart),
PAGE = 0
}

4..Functions that are to be executed from RAM have to be assigned to the ramfuncs section by compiler CODE_SECTION #pragma statements as
shown in the below. (only the function name without brackets! )

#pragma CODE_SECTION(_IQmpy, "ramfuncs");

5. call MemCopy(&RamfuncsLoadStart, &RamfuncsLoadEnd, &RamfuncsRunStart);

Now the specified functions will run in RAM!

Further informations you can find here:

C280x/C2801x C/C++ Header Files and Peripheral
Examples Quick Start

chapter 4.5.3

http://focus.ti.com/docs/toolsw/folders/print/sprc191.html

thanks Robin,

About 4 of your reply,if need copy two function of IQmath,such as IQmpy,and IQdiv,how can I write CODE_SECTION #pragma statements ?

Best regards,

xufeihx

If you need to copy several functions then you need several #pragma statements too.

e. g.:

#pragma CODE_SECTION(IQmpy, "ramfuncs");

#pragma CODE_SECTION(IQdiv, "ramfuncs");

....

Best regards

Robin

thanks Robin

But  when rebuild,displaied "warning: specified symbol '_IQmpy' undefined" and "warning: specified symbol '_IQmdiv undefined",Why?What can I do?

1, In DCMOTOR.C

#pragma CODE_SECTION(MainISR, "ramfuncs");
#pragma CODE_SECTION(_IQmpy, "ramfuncs");
#pragma CODE_SECTION(_IQabs, "ramfuncs");

interrupt void MainISR(void)
{

.........

 speed1.Speed = _IQmpy(SpeedLpfN_1,SpeedK1);

............

}

2, In f2808_nonBIOS_flash.cmd

/**********************************************************************
* File: f2808_nonBIOS_flash.cmd -- Linker command file for non-DSP/BIOS
* code with DSP in Boot to Flash boot mode.
*
* History: 11/20/2010 - original (D. Alter)
**********************************************************************/

MEMORY
{
PAGE 0:    /* Program Memory */
   BEGIN_M0    : origin = 0x000000, length = 0x000002     /* Part of M0SARAM.  Used for "Boot to M0" bootloader mode. */
   L0SARAM     : origin = 0x008000, length = 0x001000     /* 4Kw L0 SARAM .Run RamFuncs*/
   H0SARAM     : origin = 0x00A002, length = 0x002000     /* 8Kw H0 SARAM .No used*/
   OTP         : origin = 0x3D7800, length = 0x000400     /* 1Kw OTP */
   FLASH_ABCD  : origin = 0x3E8000, length = 0x00FF80     /* 64kW FLASH, Sectors A, B, C, and D combined */
   CSM_RSVD    : origin = 0x3F7F80, length = 0x000076     /* Part of FLASH Sector A.  Reserved when CSM is in use. */
   BEGIN_FLASH : origin = 0x3F7FF6, length = 0x000002     /* Part of FLASH Sector A.  Used for "boot to flash" bootloader mode. */
   PASSWORDS   : origin = 0x3F7FF8, length = 0x000008     /* Part of FLASH Sector A.  CSM password locations. */
/*   IQTABLES    : origin = 0x3FF000, length = 0x000B50      Part of Boot ROM */
/*   BOOTROM     : origin = 0x3FFB50, length = 0x000470      4Kw Boot ROM */
   ROM         : origin = 0x3FF000, length = 0x000FC0     /* ref:F2808.CMD */
   RESET       : origin = 0x3FFFC0, length = 0x000002     /* part of Boot ROM */

 PAGE 1 :   /* Data Memory */
   M0SARAM     : origin = 0x000002, length = 0x0003FE     /* 1Kw M0 SARAM .For .bss,.ebss,.cio,.sysmem,.esysmem*/
   M1SARAM     : origin = 0x000400, length = 0x000400     /* 1Kw M1 SARAM .For.stack */
   L1SARAM     : origin = 0x009000, length = 0x001000     /* 4Kw L1 SARAM .No used*/
}

 
SECTIONS
{
/*** Compiler Required Sections ***/
  /* Program memory (PAGE 0) sections */
   .text             : > FLASH_ABCD,        PAGE = 0
   .cinit            : > FLASH_ABCD,        PAGE = 0
   .const            : > FLASH_ABCD,        PAGE = 0
   .econst           : > FLASH_ABCD,        PAGE = 0     
   .pinit            : > FLASH_ABCD,        PAGE = 0
   .reset            : > RESET,             PAGE = 0, TYPE = DSECT  /* We are not using the .reset section */
   .switch           : > FLASH_ABCD,        PAGE = 0

  /* Data Memory (PAGE 1) sections */
   .bss              : > M0SARAM,           PAGE = 1
   .ebss             : > M0SARAM,           PAGE = 1
   .cio              : > M0SARAM,           PAGE = 1
   .stack            : > M1SARAM,           PAGE = 1
   .sysmem           : > M0SARAM,           PAGE = 1
   .esysmem          : > M0SARAM,           PAGE = 1

/*** User Defined Sections ***/
   codestart         : > BEGIN_FLASH,       PAGE = 0                /* Used by file CodeStartBranch.asm */
   csm_rsvd          : > CSM_RSVD,          PAGE = 0                /* Used by file passwords.asm */
   csmpasswds        : > PASSWORDS,         PAGE = 0
/*   passwords         : > PASSWORDS,         PAGE = 0            Used by file passwords.asm */
   ramfuncs          :   LOAD = FLASH_ABCD, PAGE = 0                /* Used by InitFlash() in SysCtrl.c */
                         RUN = L0SARAM,     PAGE = 0
                         LOAD_START(_RamfuncsLoadStart),           /*ref:F2808.CMD*/
                         LOAD_END(_RamfuncsLoadEnd),
                         RUN_START(_RamfuncsRunStart)
/*ref:F2808.CMD*/
   /* Allocate IQ math areas: */
   IQmath              : > FLASH_ABCD      PAGE = 0                  /* Math Code */
   IQmathTables        : > ROM             PAGE = 0, TYPE = NOLOAD   /* Math Tables In ROM */
}

/******************* end of file ************************/

Best regards

xufeihx

It seems like the compiler couldn`t find the two functions.

Did you include IQmathLib.h in DCMOTOR.c with the "#include"-instruction before using the functions _IQmps and _IQabs? 

Best regards

thanks Robin,

Yes,in DCMOTOR.c, #include "DCMOTOR.h" and in DCMOTOR.h,#include "IQmathLib.h"

Best regards

Please check if you can find IQmathLib.h in the "Includes"-folder on the left side of the Code Composer Studio IDE.

Did you adapt the Linker Search Path?

Without copying the functions to RAM, was it possible to use them without errors?

thanks Robin

1, I can find IQmathLib.h in the "Includes"-folder on the left side of the Code Composer Studio IDE.

2, How could I adapt the Linker Search Path? The IQmathLib.h is in C:\tidcs\DMC\c28\v32x\lib\dmclib\cIQmath\include. I'm using ccs3.1 or ccs3.3

3, The application work well during development in ram.

4, In the directive of #pragma CODE_SECTION(func,"section name", how to write the func's name, such as _IQmpy,_IQabs,etc.

emergency!  Ple help me.

Best regard,

xufeihx

In the directive of #pragma CODE_SECTION(func,"section name", how to write the func's name, such as _IQmpy,_IQabs,etc.

I am working with CCS 4, but I think you don`t have to adapt the Linker Search Path if it`s working without copying the functions into RAM.

But I think I`ve got the solution:

Try to write #pragma CODE_SECTION(__IQmpy, "ramfuncs"); (with two underline characters )

The problem is that "_IQmpy" is a  preprocessor macro:

in IQmathLib.h you can find the following definition:

#define   _IQmpy(A,B)    __IQmpy(A,B,GLOBAL_Q)

so, "__IQmpy" with two underline characters is the true function name!

Best regards.