CMD中的.switch段

hi Eric

不好意思，刚才的CMD文件发错了，请您查阅本次回复

我现在想把程序烧写进flash里面，上电后全部搬移到RAM中运行，所需要的CMD文件不就是FLASH的吗？还需要F2335.cmd这个文件吗？

.switch : LOAD = FLASHA, PAGE = 0 /* can be ROM */ 
RUN = RAM_L0L1L2L3, PAGE = 0 /* must be CSM secured RAM */
LOAD_START(_switch_loadstart),
RUN_START(_switch_runstart),
SIZE(_switch_size)

这是我在F2833x-nonBOIS-flash CMD中对switch段的操作。

另外附上CMD文件，您帮我看看这样为flash-API分配段可不可以？

MEMORY
{
PAGE 0: /* Program Memory */
/* Memory (RAM/FLASH/OTP) blocks can be moved to PAGE1 for data allocation */

ZONE0 : origin = 0x004000, length = 0x001000 /* XINTF zone 0 */
RAM_L0L1L2L3: origin = 0x008000, length = 0x004000 /* on-chip RAM */
OTP : origin = 0x380400, length = 0x000400 /* on-chip OTP */
ZONE6 : origin = 0x100000, length = 0x100000 /* XINTF zone 6 */
ZONE7A : origin = 0x200000, length = 0x00FC00 /* XINTF zone 7 - program space */
FLASHH : origin = 0x300000, length = 0x008000 /* on-chip FLASH */
FLASHG : origin = 0x308000, length = 0x008000 /* on-chip FLASH */
FLASHF : origin = 0x310000, length = 0x008000 /* on-chip FLASH */
FLASHE : origin = 0x318000, length = 0x008000 /* on-chip FLASH */
FLASHD : origin = 0x320000, length = 0x008000 /* on-chip FLASH */
FLASHC : origin = 0x328000, length = 0x008000 /* on-chip FLASH */
FLASHA : origin = 0x338000, length = 0x007F80 /* on-chip FLASH */
CSM_RSVD : origin = 0x33FF80, length = 0x000076 /* Part of FLASHA. Program with all 0x0000 when CSM is in use. */
BEGIN_FLASH : origin = 0x33FFF6, length = 0x000002 /* Part of FLASHA. Used for "boot to Flash" bootloader mode. */
CSM_PWL : origin = 0x33FFF8, length = 0x000008 /* Part of FLASHA. CSM password locations in FLASHA */
ADC_CAL : origin = 0x380080, length = 0x000009 /* Part of TI OTP */
IQTABLES : origin = 0x3FE000, length = 0x000b50 /* IQ Math Tables in Boot ROM */
IQTABLES2 : origin = 0x3FEB50, length = 0x00008c /* IQ Math Tables in Boot ROM */
FPUTABLES : origin = 0x3FEBDC, length = 0x0006A0 /* FPU 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 */

RAMM0 : origin = 0x000000, length = 0x000400 /* on-chip RAM block M0 */
BOOT_RSVD : origin = 0x000400, length = 0x000080 /* Part of M1, BOOT rom will use this for stack */
RAMM1 : origin = 0x000480, length = 0x000380 /* on-chip RAM block M1 */
RAML4 : origin = 0x00C000, length = 0x001000 /* on-chip RAM block L4 */
RAML5 : origin = 0x00D000, length = 0x001000 /* on-chip RAM block L5 */
RAML6 : origin = 0x00E000, length = 0x001000 /* on-chip RAM block L6 */
RAML7 : origin = 0x00F000, length = 0x001000 /* on-chip RAM block L7 */
ZONE7B : origin = 0x20FC00, length = 0x000400 /* XINTF zone 7 - data space */
FLASHB : origin = 0x330000, length = 0x008000 /* on-chip FLASH */
}

SECTIONS
{

Flash28_API:
{
-lFlash28335_API_V210.lib(.econst)
-lFlash28335_API_V210.lib(.text)
} LOAD = FLASHD,
RUN = RAM_L0L1L2L3,
LOAD_START(_Flash28_API_LoadStart),
LOAD_END(_Flash28_API_LoadEnd),
RUN_START(_Flash28_API_RunStart),
PAGE = 0

/*** Code Security Password Locations ***/
csmpasswds : > CSM_PWL PAGE = 0
csm_rsvd : > CSM_RSVD PAGE = 0

/*** User Defined Sections ***/
codestart : > BEGIN_FLASH, PAGE = 0 /* Used by file CodeStartBranch.asm */
wddisable : > FLASHA, PAGE = 0
copysections : > FLASHA, PAGE = 0

/* Allocate IQ math areas: */
IQmath : > FLASHC PAGE = 0 /* Math Code */
IQmathTables : > IQTABLES, PAGE = 0, TYPE = NOLOAD
IQmathTables2 : > IQTABLES2, PAGE = 0, TYPE = NOLOAD
FPUmathTables : > FPUTABLES, PAGE = 0, TYPE = NOLOAD

/* Allocate DMA-accessible RAM sections: */
DMARAML4 : > RAML4, PAGE = 1
DMARAML5 : > RAML5, PAGE = 1
DMARAML6 : > RAML6, PAGE = 1
DMARAML7 : > RAML7, PAGE = 1

/* Allocate 0x400 of XINTF Zone 7 to storing data */
ZONE7DATA : > ZONE7B, PAGE = 1

/* Allocate ADC_cal function (pre-programmed by factory into TI reserved memory) */
.adc_cal : load = ADC_CAL, PAGE = 0, TYPE = NOLOAD

/* .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

/*** Uninitialized Sections ***/
.stack : > RAMM0 PAGE = 1
.ebss : > RAMM1 PAGE = 1
.esysmem : > RAMM1 PAGE = 1

/*** Initialized Sections ***/
.cinit : LOAD = FLASHA, PAGE = 0 /* can be ROM */
RUN = RAM_L0L1L2L3, PAGE = 0 /* must be CSM secured RAM */
LOAD_START(_cinit_loadstart),
RUN_START(_cinit_runstart),
SIZE(_cinit_size)

.const : LOAD = FLASHA, PAGE = 0 /* can be ROM */
RUN = RAM_L0L1L2L3, PAGE = 0 /* must be CSM secured RAM */
LOAD_START(_const_loadstart),
RUN_START(_const_runstart),
SIZE(_const_size)

.econst : LOAD = FLASHA, PAGE = 0 /* can be ROM */
RUN = RAM_L0L1L2L3, PAGE = 0 /* must be CSM secured RAM */
LOAD_START(_econst_loadstart),
RUN_START(_econst_runstart),
SIZE(_econst_size)

.pinit : LOAD = FLASHA, PAGE = 0 /* can be ROM */
RUN = RAM_L0L1L2L3, PAGE = 0 /* must be CSM secured RAM */
LOAD_START(_pinit_loadstart),
RUN_START(_pinit_runstart),
SIZE(_pinit_size)

.switch : LOAD = FLASHA, PAGE = 0 /* can be ROM */
RUN = RAM_L0L1L2L3, PAGE = 0 /* must be CSM secured RAM */
LOAD_START(_switch_loadstart),
RUN_START(_switch_runstart),
SIZE(_switch_size)

.text : LOAD = FLASHA, PAGE = 0 /* can be ROM */
RUN = RAM_L0L1L2L3, PAGE = 0 /* must be CSM secured RAM */
LOAD_START(_text_loadstart),
RUN_START(_text_runstart),
SIZE(_text_size)
}

thanks Eric

tanson,

TI是默认是在non bios .cmd定义寄存器的存储映射，而在F2833x.cmd中分配flash，RAM空间，当然你把两者融合在一起做成一个cmd也是没问题的，只要相对应的地址不要出错就可以。

你把所有的代码和数据放在FLASHA扇区，空间要确保够用。

另外建议你对那些load在flash，run在RAM的段用下面的语法定义

ramfuncs           

: LOAD = FLASHD,                         

RUN = RAMM0,                         

LOAD_START(_RamfuncsLoadStart),                         

LOAD_SIZE(_RamfuncsLoadSize),                         

RUN_START(_RamfuncsRunStart),                         

PAGE = 0

Eric

Tthanks Eric

我将CMD空间重新做了分配，将EDC三个区合并代替A区，但是编译后还是有warning: load address of uninitialized section .switch ignored。这个警告，.map中.switch段还是没分配到空间。

>> warning: load address of uninitialized section .const ignored
>> warning: load address of uninitialized section .switch ignored

而且每次都是这两个警告，第一个我还能理解，因为使用的large memory 所以const段不使用，就不必分配空间了，可是程序中明明使用了switch语句，.switch却没有空间，这点我一直很迷惑，这个switch有什么特别的地方要注意吗？

Eric

我按照你说的实验了一下，.switch    0    00318000    00000000     UNINITIALIZED 确实.switch里没有东西，并且标示为未初始化段，为什么会这样？我在程序中使用了switch语句，应该会有数据啊。

另外我还做了一个实验把switch语句中的内容用if语句改写，程序烧写后能正常运行，在switch里却不行，对此您有什么建议？谢谢

不知道你的问题解决了没有。我在spraau8这个文件的最后一段看到，说是 不是所有的内容都需要放在RAM中运行，只需要把.text从FLASH拷贝到ram即可。我准备按照这个方法试一试。