CMD파일

cmd파일, 커맨드 파일이라고 하는것 같다.

 그 구조를 뜯어보면 아래처럼 되어있다.

 

/*
// TI File $Revision: /main/3 $
// Checkin $Date: April 23, 2007   09:09:27 $
//###########################################################################
//
// FILE:    F2812_EzDSP_RAM_lnk.cmd
//
// TITLE:   Linker Command File For F2812 eZdsp examples that run out of RAM
//          This linker file assumes the user is booting up in Jump to H0 mode
//
//###########################################################################
// $TI Release: DSP281x C/C++ Header Files V1.20 $
// $Release Date: July 27, 2009 $
//###########################################################################
*/

/* ======================================================
// 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>\DSP281x_Headers\cmd
//  
// For BIOS applications add:      DSP281x_Headers_BIOS.cmd
// For nonBIOS applications add:   DSP281x_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 DSP281x_Headers_nonBIOS.cmd */

/* Uncomment this line to include file only for BIOS applications */
/* -l DSP281x_Headers_BIOS.cmd */

/* 2) In your project add the path to <base>\DSP281x_headers\cmd to the
   library search path under project->build options, linker tab,
   library search path (-i).
/*========================================================= */

 

MEMORY
{
PAGE 0 :
   /* For this example, H0 is split between PAGE 0 and PAGE 1 */ 
   /* BEGIN is used for the "boot to HO" bootloader mode      */
   /* RESET is loaded with the reset vector only if           */
   /* the boot is from XINTF Zone 7.  Otherwise reset vector  */
   /* is fetched from boot ROM. See .reset section below      */
  
   RAMM0      : origin = 0x000000, length = 0x000400
   BEGIN      : origin = 0x3F8000, length = 0x000002            
   PRAMH0     : origin = 0x3F8002, length = 0x001FFE
   RESET      : origin = 0x3FFFC0, length = 0x000002          

        
PAGE 1 :

   /* For this example, H0 is split between PAGE 0 and PAGE 1 */

   RAMM1    : origin = 0x000400, length = 0x000400
   RAML1    : origin = 0x009000, length = 0x001000     /* on-chip RAM block L1 */
/*   DRAMH0   : origin = 0x3f9000, length = 0x001000 */       
}
 
 
SECTIONS
{
   /* Setup for "boot to H0" mode:
      The codestart section (found in DSP28_CodeStartBranch.asm)
      re-directs execution to the start of user code. 
      Place this section at the start of H0  */

   codestart        : > BEGIN,       PAGE = 0
   ramfuncs         : > PRAMH0       PAGE = 0 
   .text            : > PRAMH0,      PAGE = 0
   .cinit           : > PRAMH0,      PAGE = 0
   .pinit           : > PRAMH0,      PAGE = 0
   .switch          : > RAMM0,       PAGE = 0
   .reset           : > RESET,       PAGE = 0, TYPE = DSECT /* not used, */
  
   .stack           : > RAMM1,       PAGE = 1
   .ebss            : > RAML1,      PAGE = 1
   .econst          : > RAML1,      PAGE = 1     
   .esysmem         : > RAML1,      PAGE = 1

    
}

역할을 메모리 영역에 구조체를 배치해 준다는것 같다,

 

예를들어 abc라는 구조체를 DSP의 0x12345라는 주소에 집어넣고자 한다면

 

본 소스에 선처리 잡업 코드로

#pragma Data_SECTION(abc,"ABC");

를 해주고

 

커맨드 파일 내의 SECTION안에

SECTION{

...

ABC : >ASDF, PAGE = 1

...

}

 

MEMORY{

 

PAGE 1:

...

ASDF : origin = 0x12345, length = 0x1000

...

}

 

위와같이 해주면 ASDF라는 메모리 영역이 0x12345 에서 시작하여 0x1000의 크기를 갖으며

ABC로 이름붙여진 abc구조체가 그 영역에 들어가게 된다.

 

이러한 MEMORY{} 구간의 정의들은 DSP메모리맵을 기준으로 할당된다. 따라서 자신이 사용하는 DSP에 맞는 cmd파일을 적용하도록 하자.

 

이 설정은 properties의 General의 맨 하단의 두번째의 메뉴인 Linker command file을 통해서 링크 시킬 수 있다.