关于在RAM中运行的问题

你好，大神，现在用TMS320F28027芯片，由于程序比较大， 0x008000-0x009000 这个空间不够用，能不能把一部分程序放到0x3f8000-0x3f9000中呢？非常感谢

大神 我遇到了你第一个问题，就是有部分代码需要在RAM中运行，同时也添加了CLA模块。也是出现CLA正常，但是一旦程序运行xxxx函数（#pragma CODE_SECTION (xxxx, "ramfuncs") ）了。程序就会跑入到interrupt void ISR_ILLEGAL(void)“函数中。我排查了下我自己的CMD文件，没有发现有同一个内存，分配了2个不同名字的情况。大神知道还有什么可能原因会导致这个现象不？

下面是我的CMD文件：

/*
//###########################################################################
//
// FILE: F28035_CLA_C.cmd
//
// TITLE: Linker Command File For F28035 Device
//
//###########################################################################
// $TI Release: F2803x C/C++ Header Files and Peripheral Examples V130 $
// $Release Date: May 8, 2015 $
// $Copyright: Copyright (C) 2009-2015 Texas Instruments Incorporated -
// http://www.ti.com/ ALL RIGHTS RESERVED $
//###########################################################################
*/

/* ======================================================
// For Code Composer Studio V2.2 and later
// ---------------------------------------
// In addition to this memory linker command file,
// add the header linker command file directly to the project.
// The header linker command file is required to link the
// peripheral structures to the proper locations within
// the memory map.
//
// The header linker files are found in <base>\DSP2803x_Headers\cmd
//
// For BIOS applications add: DSP2803x_Headers_BIOS.cmd
// For nonBIOS applications add: DSP2803x_Headers_nonBIOS.cmd
========================================================= */

/* ======================================================
// For Code Composer Studio prior to V2.2
// --------------------------------------
// 1) Use one of the following -l statements to include the
// header linker command file in the project. The header linker
// file is required to link the peripheral structures to the proper
// locations within the memory map */

/* Uncomment this line to include file only for non-BIOS applications */
/* -l DSP2803x_Headers_nonBIOS.cmd */

/* Uncomment this line to include file only for BIOS applications */
/* -l DSP2803x_Headers_BIOS.cmd */

/* 2) In your project add the path to <base>\DSP2803x_headers\cmd to the
library search path under project->build options, linker tab,
library search path (-i).
/*========================================================= */

/* Define the memory block start/length for the F28035
PAGE 0 will be used to organize program sections
PAGE 1 will be used to organize data sections

Notes:
Memory blocks on F2803x are uniform (ie same
physical memory) in both PAGE 0 and PAGE 1.
That is the same memory region should not be
defined for both PAGE 0 and PAGE 1.
Doing so will result in corruption of program
and/or data.

L0 memory block is mirrored - that is
it can be accessed in high memory or low memory.
For simplicity only one instance is used in this
linker file.

Contiguous SARAM memory blocks or flash sectors can be
be combined if required to create a larger memory block.
*/
_Cla1Prog_Start = _Cla1funcsRunStart;
-heap 0x300
-stack 0x300

// Define a size for the CLA scratchpad area that will be used
// by the CLA compiler for local symbols and temps
// Also force references to the special symbols that mark the
// scratchpad are.
// CLA_SCRATCHPAD_SIZE = 0x100;
--undef_sym=__cla_scratchpad_end
--undef_sym=__cla_scratchpad_start

MEMORY
{
PAGE 0: /* Program Memory */
/* Memory (RAM/FLASH/OTP) blocks can be moved to PAGE1 for data allocation */
RAML0 : origin = 0x009000, length = 0x000800 /* on-chip RAM block L3 */
RAML1 : origin = 0x009800, length = 0x000800 /* on-chip RAM block L4 */
OTP : origin = 0x3D7800, length = 0x000400 /* on-chip OTP */
// FLASHH : origin = 0x3E8000, length = 0x002000 /* on-chip FLASH */
// FLASHG : origin = 0x3EA000, length = 0x002000 /* on-chip FLASH */
FLASHF : origin = 0x3E8000, length = 0x002000 /* on-chip FLASH */
FLASHE : origin = 0x3EA000, length = 0x002000 /* on-chip FLASH */
FLASHD : origin = 0x3EC000, length = 0x002000 /* on-chip FLASH */
FLASHC : origin = 0x3EE000, length = 0x006000 /* on-chip FLASH */
FLASHA : origin = 0x3F6000, length = 0x001F80 /* on-chip FLASH */
CSM_RSVD : origin = 0x3F7F80, length = 0x000076 /* Part of FLASHA. Program with all 0x0000 when CSM is in use. */
BEGIN : origin = 0x3F7FF6, length = 0x000002 /* Part of FLASHA. Used for "boot to Flash" bootloader mode. */
CSM_PWL_P0 : origin = 0x3F7FF8, length = 0x000008 /* Part of FLASHA. CSM password locations in FLASHA */

IQTABLES : origin = 0x3FE000, length = 0x000B50 /* IQ Math Tables in Boot ROM */
IQTABLES2 : origin = 0x3FEB50, length = 0x00008C /* IQ Math Tables in Boot ROM */
IQTABLES3 : origin = 0x3FEBDC, length = 0x0000AA /* IQ Math Tables in Boot ROM */

ROM : origin = 0x3FF27C, length = 0x000D44 /* Boot ROM */
RESET : origin = 0x3FFFC0, length = 0x000002 /* part of boot ROM */
VECTORS : origin = 0x3FFFC2, length = 0x00003E /* part of boot ROM */

PAGE 1 : /* Data Memory */
/* Memory (RAM/FLASH/OTP) blocks can be moved to PAGE0 for program allocation */
/* Registers remain on PAGE1 */
BOOT_RSVD : origin = 0x000000, length = 0x000050 /* Part of M0, BOOT rom will use this for stack */
RAMM0 : origin = 0x000050, length = 0x0000B0 /* on-chip RAM block M0 */
RAMM1 : origin = 0x000100, length = 0x000400 /* on-chip RAM block M1 */
RAML2 : origin = 0x008000, length = 0x000800 /* on-chip RAM block L0 */
CLARAM0 : origin = 0x008800, length = 0x000400
CLARAM1 : origin = 0x008C00, length = 0x000400

CLA1_MSGRAMLOW : origin = 0x001480, length = 0x000080
CLA1_MSGRAMHIGH : origin = 0x001500, length = 0x000080

FLASHB : origin = 0x3F4000, length = 0x002000 /* on-chip FLASH */

}

/* Allocate sections to memory blocks.
Note:
codestart user defined section in DSP28_CodeStartBranch.asm used to redirect code
execution when booting to flash
ramfuncs user defined section to store functions that will be copied from Flash into RAM
*/

SECTIONS
{

/* Allocate program areas: */
.cinit : > FLASHA PAGE = 0
.pinit : > FLASHA, PAGE = 0
.text : > FLASHC PAGE = 0
codestart : > BEGIN PAGE = 0
ramfuncs : LOAD = FLASHD,
RUN = RAML1,
/*LOAD_START(_RamfuncsLoadStart),
//LOAD_END(_RamfuncsLoadEnd),
LOAD_SIZE(_RamfuncsLoadSize),
RUN_START(_RamfuncsRunStart),*/

LOAD_START(_RamfuncsLoadStart),
LOAD_END(_RamfuncsLoadEnd),
RUN_START(_RamfuncsRunStart),
LOAD_SIZE(_RamfuncsLoadSize),
PAGE = 0


csmpasswds : > CSM_PWL_P0 PAGE = 0
csm_rsvd : > CSM_RSVD PAGE = 0

/* Allocate uninitalized data sections: */
.stack : > RAMM1 PAGE = 1
.cio : >> RAML2 | RAMM1 PAGE = 1
.sysmem : > RAMM1 PAGE = 1
.ebss : > RAML2 PAGE = 1
.esysmem : > RAML2 PAGE = 1


/* Initalized sections go in Flash */
/* For SDFlash to program these, they must be allocated to page 0 */
.econst : > FLASHA PAGE = 0
.switch : > FLASHA PAGE = 0

/* Allocate IQ math areas: */
IQmath : > FLASHA PAGE = 0 /* Math Code */
IQmathTables : > IQTABLES, PAGE = 0, TYPE = NOLOAD

.bss_cla : > CLARAM0, PAGE = 1
.scratchpad : > CLARAM0, PAGE = 1

Cla1Prog : LOAD = FLASHD,
RUN = RAML0,
LOAD_START(_Cla1funcsLoadStart),
LOAD_END(_Cla1funcsLoadEnd),
RUN_START(_Cla1funcsRunStart),
LOAD_SIZE(_Cla1funcsLoadSize),
PAGE = 0

Cla1ToCpuMsgRAM : > CLA1_MSGRAMLOW, PAGE = 1
CpuToCla1MsgRAM : > CLA1_MSGRAMHIGH, PAGE = 1
Cla1DataRam0 : > CLARAM0, PAGE = 1
Cla1DataRam1 : > CLARAM1, PAGE = 1

GROUP : LOAD = FLASHB,
RUN = CLARAM1,
LOAD_START(_Cla1mathTablesLoadStart),
LOAD_END(_Cla1mathTablesLoadEnd),
RUN_START(_Cla1mathTablesRunStart),
LOAD_SIZE(_Cla1mathTablesLoadSize),
PAGE = 1

{
CLA1mathTables
.const_cla
}

CLAscratch :
{ *.obj(CLAscratch)
. += CLA_SCRATCHPAD_SIZE;
*.obj(CLAscratch_end) } > CLARAM0,
PAGE = 1

/* Uncomment the section below if calling the IQNexp() or IQexp()
functions from the IQMath.lib library in order to utilize the
relevant IQ Math table in Boot ROM (This saves space and Boot ROM
is 1 wait-state). If this section is not uncommented, IQmathTables2
will be loaded into other memory (SARAM, Flash, etc.) and will take
up space, but 0 wait-state is possible.
*/
/*
IQmathTables2 : > IQTABLES2, PAGE = 0, TYPE = NOLOAD
{
IQmath.lib<IQNexpTable.obj> (IQmathTablesRam)
}
*/
/* Uncomment the section below if calling the IQNasin() or IQasin()
functions from the IQMath.lib library in order to utilize the
relevant IQ Math table in Boot ROM (This saves space and Boot ROM
is 1 wait-state). If this section is not uncommented, IQmathTables2
will be loaded into other memory (SARAM, Flash, etc.) and will take
up space, but 0 wait-state is possible.
*/
/*
IQmathTables3 : > IQTABLES3, PAGE = 0, TYPE = NOLOAD
{
IQmath.lib<IQNasinTable.obj> (IQmathTablesRam)
}
*/

/* .reset is a standard section used by the compiler. It contains the */
/* the address of the start of _c_int00 for C Code. /*
/* When using the boot ROM this section and the CPU vector */
/* table is not needed. Thus the default type is set here to */
/* DSECT */
.reset : > RESET, PAGE = 0, TYPE = DSECT
vectors : > VECTORS PAGE = 0, TYPE = DSECT

}

/*
//===========================================================================
// End of file.
//===========================================================================
*/