各位大侠：
我最近在调试28277s，遇到一个问题，我按照SPRAAU8A的方法增加了BootLoader以后，在CCS6加载完成后没有跳转到main函数，而是停在0x03FE493处死循环。我的这个程序部用bootloader下调试是没有问题的，不用bootloader的方式直接在下载到flash运行也是没有问题。请各位帮帮我这是怎么回事？
code start文件内容如下：
WD_DISABLE .set 1 ;set to 1 to disable WD, else set to 0
.ref copy_sections
.global code_start
***********************************************************************
* Function: codestart section
*
* Description: Branch to code starting point
***********************************************************************
.sect "codestart"
code_start:
.if WD_DISABLE == 1
LB wd_disable ;Branch to watchdog disable code
.else
LB copy_sections ;Branch to copy_sections
.endif
;end codestart section
***********************************************************************
* Function: wd_disable
*
* Description: Disables the watchdog timer
***********************************************************************
.if WD_DISABLE == 1
.text
wd_disable:
SETC OBJMODE ; Set OBJMODE for 28x object code
EALLOW ; Enable EALLOW protected register access
MOVZ DP, #7029h>>6 ; Set data page for WDCR register
MOV @7029h, #0068h ; Set WDDIS bit in WDCR to disable WD
EDIS ;Disable EALLOW protected register access
LB copy_sections ;Branch to copy_sections
.endif
section copy内容如下：
.ref _c_int00
.global copy_sections
.global _cinit_loadstart, _cinit_runstart, _cinit_size
.global _const_loadstart, _const_runstart, _const_size
.global _econst_loadstart, _econst_runstart, _econst_size
.global _pinit_loadstart, _pinit_runstart, _pinit_size
.global _switch_loadstart, _switch_runstart, _switch_size
.global _text_loadstart, _text_runstart, _text_size
***********************************************************************
* Function: copy_sections
*
* Description: Copies initialized sections from flash to ram
***********************************************************************
.sect "copysections"
copy_sections:
MOVL XAR5,#_cinit_size ; Store Section Size in XAR5
MOVL ACC,@XAR5 ; Move Section Size to ACC
MOVL XAR6,#_cinit_loadstart ; Store Load Starting Address in XAR6
MOVL XAR7,#_cinit_runstart ; Store Run Address in XAR7
LCR copy ; Branch to Copy
MOVL XAR5,#_const_size ; Store Section Size in XAR5
MOVL ACC,@XAR5 ; Move Section Size to ACC
MOVL XAR6,#_const_loadstart ; Store Load Starting Address in XAR6
MOVL XAR7,#_const_runstart ; Store Run Address in XAR7
LCR copy ; Branch to Copy
MOVL XAR5,#_econst_size ; Store Section Size in XAR5
MOVL ACC,@XAR5 ; Move Section Size to ACC
MOVL XAR6,#_econst_loadstart ; Store Load Starting Address in XAR6
MOVL XAR7,#_econst_runstart ; Store Run Address in XAR7
LCR copy ; Branch to Copy
MOVL XAR5,#_pinit_size ; Store Section Size in XAR5
MOVL ACC,@XAR5 ; Move Section Size to ACC
MOVL XAR6,#_pinit_loadstart ; Store Load Starting Address in XAR6
MOVL XAR7,#_pinit_runstart ; Store Run Address in XAR7
LCR copy ; Branch to Copy
MOVL XAR5,#_switch_size ; Store Section Size in XAR5
MOVL ACC,@XAR5 ; Move Section Size to ACC
MOVL XAR6,#_switch_loadstart ; Store Load Starting Address in XAR6
MOVL XAR7,#_switch_runstart ; Store Run Address in XAR7
LCR copy ; Branch to Copy
MOVL XAR5,#_text_size ; Store Section Size in XAR5
MOVL ACC,@XAR5 ; Move Section Size to ACC
MOVL XAR6,#_text_loadstart ; Store Load Starting Address in XAR6
MOVL XAR7,#_text_runstart ; Store Run Address in XAR7
LCR copy ; Branch to Copy
LB _c_int00 ; Branch to start of boot.asm in RTS library
copy:
B return,EQ ; Return if ACC is Zero (No section to copy)
SUBB ACC,#1
RPT AL ; Copy Section From Load Address to
|| PWRITE *XAR7, *XAR6++ ; Run Address
return:
LRETR ; Return
.end
CMD文件内容：
MEMORY
{
PAGE 0 : /* Program Memory */
/* Memory (RAM/FLASH) blocks can be moved to PAGE1 for data allocation */
/* BEGIN is used for the "boot to Flash" bootloader mode */
BEGIN : origin = 0x080000, length = 0x000002
RAMM0 : origin = 0x000122, length = 0x0002DE
RAMD0 : origin = 0x00B000, length = 0x000800
RAMLS : origin = 0x008000, length = 0x003000
RESET : origin = 0x3FFFC0, length = 0x000002
/* Flash sectors */
FLASHA : origin = 0x080002, length = 0x001FFE /* on-chip Flash */
FLASHB : origin = 0x082000, length = 0x07E000 /* on-chip Flash */
PAGE 1 : /* Data Memory */
/* Memory (RAM/FLASH) blocks can be moved to PAGE0 for program allocation */
BOOT_RSVD : origin = 0x000002, length = 0x000120 /* Part of M0, BOOT rom will use this for stack */
RAMM1 : origin = 0x000400, length = 0x000400 /* on-chip RAM block M1 */
RAMD1 : origin = 0x00B800, length = 0x000800
RAMGS : origin = 0x00C000, length = 0x010000
}
SECTIONS
{
/* Allocate program areas: */
codestart : > BEGIN PAGE = 0, ALIGN(4)
copysections : > FLASHB PAGE = 0, ALIGN(4)
/*** Initialized Sections ***/
.cinit : LOAD = FLASHB, PAGE = 0 /* can be ROM */
RUN = RAMLS, PAGE = 0 /* must be CSM secured RAM */
LOAD_START(_cinit_loadstart),
RUN_START(_cinit_runstart),
SIZE(_cinit_size)
.const : LOAD = FLASHB, PAGE = 0 /* can be ROM */
RUN = RAMLS, PAGE = 0 /* must be CSM secured RAM */
LOAD_START(_const_loadstart),
RUN_START(_const_runstart),
SIZE(_const_size)
.econst : LOAD = FLASHB, PAGE = 0 /* can be ROM */
RUN = RAMLS, PAGE = 0 /* must be CSM secured RAM */
LOAD_START(_econst_loadstart),
RUN_START(_econst_runstart),
SIZE(_econst_size)
.pinit : LOAD = FLASHB, PAGE = 0 /* can be ROM */
RUN = RAMLS, PAGE = 0 /* must be CSM secured RAM */
LOAD_START(_pinit_loadstart),
RUN_START(_pinit_runstart),
SIZE(_pinit_size)
.switch : LOAD = FLASHB, PAGE = 0 /* can be ROM */
RUN = RAMLS, PAGE = 0 /* must be CSM secured RAM */
LOAD_START(_switch_loadstart),
RUN_START(_switch_runstart),
SIZE(_switch_size)
.text : LOAD = FLASHB, PAGE = 0 /* can be ROM */
RUN = RAMLS, PAGE = 0 /* must be CSM secured RAM */
LOAD_START(_text_loadstart),
RUN_START(_text_runstart),
SIZE(_text_size)
/* Allocate uninitalized data sections: */
.stack : > RAMM1 PAGE = 1
.ebss : > RAMGS PAGE = 1
.esysmem : > RAMGS PAGE = 1
/* Initalized sections go in Flash */
.reset : > RESET, PAGE = 0, TYPE = DSECT /* not used, */
}
/*
//===========================================================================
// End of file.
//===========================================================================
*/
