CMD文件编写

F2812的CMD文件的编写

CMD文件里包含三部分内容：

1)输入／输出定义：

.obj文件：链接器要链接的目标文件;

.lib文件：链接器要链接的库文件;

.map文件：链接器生成的交叉索引文件;

.out文件：链接器生成的可执行代码;

链接器选项

2)MEMORY命令：描述系统实际的硬件资源

3)SECTIONS命令：描述“段”如何定位

F2812的CMD文件只包含后两部分，现对它的编写做一下总结：

（一）用于调试时用，取名为SRAM.CMD

（二）用于烧写到FLASH中时用，取名为FLASH.CMD

FLASH.CMD与SRAM.CMD基本一样，只是有两处改动：一是MEMORY中将你的程序代码部分映射到FLASH空间里；二是在SECTIONS中添加一个用户定义的起始段，起始段的代码如下：

//User Defined Sections , Used by file DSP28_CodeStartBranch.asm

codestart : > BEGIN, PAGE = 0

其中DSP28_CodeStartBranch.asm中的关键代码为：

.ref _c_int00

.sect “codestart”

Code_start:

LB _c_int00

.end

这里有个比较标准的F2812的CMD文件，可以供大家借鉴使用：

MEMORY

{s

PAGE 0:

ZONE0 : origin = 0x002000, length = 0x002000

ZONE1 : origin = 0x004000, length = 0x002000

RAML0 : origin = 0x008000, length = 0x001000

ZONE2 : origin = 0x080000, length = 0x080000

ZONE6 : origin = 0x100000, length = 0x080000

OTP: origin = 0x3D7800, length = 0x000800

FLASHJ : origin = 0x3D8000, length = 0x002000

FLASHI : origin = 0x3DA000, length = 0x002000

FLASHH : origin = 0x3DC000, length = 0x004000

FLASHG : origin = 0x3E0000, length = 0x004000

FLASHF : origin = 0x3E4000, length = 0x004000

FLASHE : origin = 0x3E8000, length = 0x004000

FLASHD : origin = 0x3EC000, length = 0x004000

FLASHC : origin = 0x3F0000, length = 0x004000 FLASHA: origin = 0x3F6000, length = 0x002000 BEGIN_H0 : origin = 0x3F8000, length = 0x000002 BEGIN_FLASH : origin = 0x3F7FF6, length = 0x000002 PRAMH0 : origin = 0x3F8002, length = 0x001FFE ZONE7 : origin = 0x3FC000, length = 0x003FC0 ROM : origin = 0x3FF000, length = 0x000FC0 RESET : origin = 0x3FFFC0, length = 0x000002 VECTORS : origin = 0x3FFFC2, length = 0x00003E PAGE 1 :

R AMM0 : origin = 0x000000, length = 0x000400 RAMM1 : origin = 0x000400, length = 0x000400

DEV_EMU : origin = 0x000880, length = 0x000180 FLASH_REGS : origin = 0x000A80, length = 0x000060 CSM : origin = 0x000AE0, length = 0x000010

XINTF : origin = 0x000B20, length = 0x000020 CPU_TIMER0 : origin = 0x000C00, length = 0x000008 CPU_TIMER1 : origin = 0x000C08, length = 0x000008 CPU_TIMER2 : origin = 0x000C10, length = 0x000008 PIE_CTRL : origin = 0x000CE0, length = 0x000020 PIE_VECT : origin = 0x000D00, length = 0x000100 ECAN_A: origin = 0x006000, length = 0x000100 ECAN_AMBOX : origin = 0x006100, length = 0x000100

SYSTEM : origin = 0x007010, length = 0x000020 SPI_A: origin = 0x007040, length = 0x000010

SCI_A: origin = 0x007050, length = 0x000010 XINTRUPT : origin = 0x007070, length = 0x000010 GPIOMUX : origin = 0x0070C0, length = 0x000020 GPIODA T : origin = 0x0070E0, length = 0x000020 ADC : origin = 0x007100, length = 0x000020

EV_A: origin = 0x007400, length = 0x000040

EV_B : origin = 0x007500, length = 0x000040

SCI_B : origin = 0x007750, length = 0x000010 MCBSP_A: origin = 0x007800, length = 0x000040

RAML1 : origin = 0x009000, length = 0x001000 FLASHB : origin = 0x3F4000, length = 0x002000 CSM_PWL : origin = 0x3F7FF8, length = 0x000008 DRAMH0 : origin = 0x3f9000, length = 0x001000

}

SECTIONS

{