请注意，本文内容源自机器翻译，可能存在语法或其它翻译错误，仅供参考。如需获取准确内容，请参阅链接中的英语原文或自行翻译。
器件型号：TMS320F28027 Thread 中讨论的其他器件：MOTORWARE、C2000WARE
工具/软件：
RAM 分配
当前使用例程
D：\ti\motorware\motorware_1_01_00_18\sw\solutions\instaspin_foc\boards\boostxldrv8305_revA\f28x\f2802xF\projects\ccs\proj_lab05b
/*
// TI File $Revision: /main/7 $
// Checkin $Date: July 6, 2009 17:25:36 $
//###########################################################################
//
// FILE: F28027.cmd
//
// TITLE: Linker Command File For F28027 Device
//
//###########################################################################
// $TI Release: 2802x C/C++ Header Files and Peripheral Examples V1.29 $
// $Release Date: January 11, 2011 $
//###########################################################################
*/
/* ======================================================
// 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>\DSP2802_Headers\cmd
//
// For BIOS applications add: DSP2802x_Headers_BIOS.cmd
// For nonBIOS applications add: DSP2802x_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 DSP2802x_Headers_nonBIOS.cmd */
/* Uncomment this line to include file only for BIOS applications */
/* -l DSP2802x_Headers_BIOS.cmd */
/* 2) In your project add the path to <base>\DSP2802x_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 F28027
PAGE 0 will be used to organize program sections
PAGE 1 will be used to organize data sections
Notes:
Memory blocks on F2802x 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.
The 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.
*/
MEMORY
{
PAGE 0: /* Program Memory */
/* Memory (RAM/FLASH/OTP) blocks can be moved to PAGE1 for data allocation */
OTP : origin = 0x3D7800, length = 0x000400 /* on-chip OTP */
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 */
FLASHB_D : origin = 0x3F0000, length = 0x006000 /* on-chip FLASH B, C and D */
D_FLASHA : origin = 0x3F6000, length = 0x001F80 /* on-chip FLASH A */
P_RAML0 : origin = 0x008000, length = 0x000980 /* on-chip PRAM block L0 */
PAGE 1 : /* Data Memory */
/* Memory (RAM/FLASH/OTP) blocks can be moved to PAGE0 for program allocation */
/* Registers remain on PAGE1 */
RAMM0_M1 : origin = 0x000000, length = 0x000600 /* on-chip RAM block M0 + M1. 0x600 to 0x800 reserved for InstaSPIN */
D_RAML0 : origin = 0x008980, length = 0x000680 /* on-chip DRAM block L0 */
}
/* 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 : > FLASHB_D PAGE = 0
.pinit : > FLASHB_D, PAGE = 0
.text : > FLASHB_D PAGE = 0
codestart : > BEGIN PAGE = 0
ramfuncs : LOAD = FLASHB_D,
RUN = P_RAML0,
LOAD_START(_RamfuncsLoadStart),
LOAD_END(_RamfuncsLoadEnd),
RUN_START(_RamfuncsRunStart),
PAGE = 0
csmpasswds : > CSM_PWL_P0 PAGE = 0
csm_rsvd : > CSM_RSVD PAGE = 0
/* Allocate uninitalized data sections: */
.stack : > D_RAML0 PAGE = 1
.ebss : > RAMM0_M1 PAGE = 1
.esysmem : > RAMM0_M1 PAGE = 1
ebss_extension : > P_RAML0 PAGE = 0
rom_accessed_data : > RAMM0_M1 PAGE = 1
vib_buf_data : > D_RAML0 PAGE = 1
graph_data : > D_RAML0 PAGE = 1
/* Initalized sections go in Flash */
/* For SDFlash to program these, they must be allocated to page 0 */
.econst : > D_FLASHA, PAGE = 0
.switch : > D_FLASHA, PAGE = 0
/* Allocate IQ math areas: */
IQmath : > FLASHB_D PAGE = 0 /* Math Code */
IQmathTables : > IQTABLES, PAGE = 0, TYPE = NOLOAD
/* 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, IQmathTables3
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.
//===========================================================================
*/
添加少量全局变量将导致 RAMM0_M1溢出。 我发现该芯片的 RAM 为6k、但 RAMM0_S1仅为约1k。 我可以直接提高该值吗？ 如何合理地操作小 D_RAML0、
