大家好,
我现在遇到这样的一个问题.
我做了一个28035的嵌入式Bootloader.基本功能已经实现,程序已经可以下载了,但是程序下载完成后,无法实现28035重启问题.
我做了这样的操作,
在CLK中初始化了看门狗的时钟采用外部晶振
SysCtrlRegs.CLKCTL.bit.WDCLKSRCSEL = 1; // Switch Watchdog Clk Src to external clock
看门狗采用复位方式.SysCtrlRegs.SCSR = 0x0000;
禁止看门狗复位SysCtrlRegs.WDCR = 0x0068; //disable watchdog
开始Bootloader程序.
Boot程序完成后
打开看门狗 ,并强制看门狗执行复位功能.
EALLOW;
SysCtrlRegs.WDCR = 0x0028; //enable watchdog
SysCtrlRegs.WDCR = 0x0038; //Reset CPU immediately
EDIS;
按照我的想法,28035应该重新启动,并根据Flash标志执行APP程序,但是现在APP并没有被执行.
而我断电重启后,系统正确执行了APP程序.
请教一下各位高人,这个复位我该如何处理.
贴上我的CMD配置.
BootLoader存放在FLASHI和FLASHBOOT.
APP中直接跳转制FLASHBOOT.
FLASH编程标志放在FLASHH
MEMORY
{
PAGE 0: /* Program Memory */
/* Memory (RAM/FLASH/OTP) blocks can be moved to PAGE1 for data allocation */
RAML1 : origin = 0x008000, length = 0x000680 /* on-chip RAM block L0 */
OTP : origin = 0x3D7800, length = 0x000400 /* on-chip OTP */
FLASHA : origin = 0x3E8000, length = 0x004000 /* on-chip FLASH */
FLASHB : origin = 0x3EC000, length = 0x002000 /* on-chip FLASG */
FLASHC : origin = 0x3EE000, length = 0x002000 /* on-chip FLASF */
FLASHD : origin = 0x3F0000, length = 0x002000 /* on-chip FLASE */
FLASHE : origin = 0x3F2000, length = 0x002000 /* on-chip FLASD */
FLASHF : origin = 0x3F4000, length = 0x001FF0 /* on-chip FLASC */
FLASHG : origin = 0x3F5FF0, length = 0x00000F /* on-chip FLASB */
FLASHH : origin = 0x3F5FFF, length = 0x000001 /* on-chip FLASA */
FLASHI : origin = 0x3F6000, length = 0x001800 /* on-chip FLASA */
FLASHBOOT : origin = 0x3F7800, length = 0x000780 /* on-chip FLASA */
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_PROG: 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 */
PAGE 1 : /* Data Memory */
/* Memory (RAM/FLASH/OTP) blocks can be moved to PAGE0 for program allocation */
/* Registers remain on PAGE1 */
BOOT_RSVD : origin = 0x000000, length = 0x000050 /* Part of M0, BOOT rom will use this for stack */
RAMM0 : origin = 0x000050, length = 0x0003B0 /* on-chip RAM block M0 */
RAMM1 : origin = 0x000400, length = 0x000400 /* on-chip RAM block M1 */
RAMOS : origin = 0x008680, length = 0x000c00 /* on-chip RAM block L0 */
RAML2 : origin = 0x009280, length = 0x000D80
}
/* 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: */
/* The Flash API functions can be grouped together as shown below.
The defined symbols _Flash28_API_LoadStart, _Flash28_API_LoadEnd
and _Flash28_API_RunStart are used to copy the API functions out
of flash memory and into SARAM */
/******************************************************************/
/* For Piccolo B we dont need to copy the API from Flash as it is */
/* present in BOOT ROM */
/******************************************************************/
Flash28_API:
{
-lFlash2803x_API_V100.lib(.text BootFlash)
-lFlash2803x_API_V100.lib(.econst BootFlash)
} LOAD = FLASHI,
RUN = RAML1,
LOAD_START(_Flash28_API_LoadStart),
LOAD_END(_Flash28_API_LoadEnd),
RUN_START(_Flash28_API_RunStart),
PAGE = 0
BootAPI:
{
-lrts2800_ml.lib(.cinit BootFlash)
-lrts2800_ml.lib(.text BootFlash)
-lExample_Flash2803x_API.obj(.cinit BootFlash)
} > FLASHI PAGE = 0
.cinit : > FLASHA PAGE = 0
.pinit : > FLASHA PAGE = 0
.text : > FLASHA PAGE = 0
codestart : > BEGIN PAGE = 0
ramfuncs : LOAD = FLASHI,
RUN = RAML1,
LOAD_START(_RamfuncsLoadStart),
LOAD_END(_RamfuncsLoadEnd),
RUN_START(_RamfuncsRunStart),
PAGE = 0
csmpasswds : > CSM_PWL_PROG PAGE = 0
csm_rsvd : > CSM_RSVD PAGE = 0
BootFlash : > FLASHI PAGE = 0
BootProcess : > FLASHBOOT PAGE = 0
/* Allocate uninitalized data sections: */
.stack : > RAMM0 PAGE = 1
.ebss : > RAMM1 PAGE = 1
.esysmem : > RAMM1 PAGE = 1
/* Initalized sections go in Flash */
/* For SDFlash to program these, they must be allocated to page 0 */
.econst : > FLASHA PAGE = 0
.switch : > FLASHA PAGE = 0
/* Allocate IQ math areas: */
IQmath : > FLASHA 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, IQmathTables2
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
}
///////////////////////////////////////////////////////////////////
以下部分是APP的跳转到Boot的入口方式,APP直接采用LB指令跳转到BootPrcess的地址.
.global _BootProcess
.ref _SysCtrlRegs
.ref _mProgramFlag
.ref _SCI_Init
.ref _Time0Init
.ref _fFlashProcess
.ref _CpuTimer0Regs
.ref _fInit28035
.ref _mReconnectTime
.sect "BootProcess"
_BootProcess:
LCR #_fInit28035
LCR #_Time0Init
LCR #_SCI_Init
MOVW DP,#_mProgramFlag
MOVW @_mProgramFlag,#0
EALLOW
MOVW DP,#_SysCtrlRegs+25
MOVW @_SysCtrlRegs+25,#0x0068
EDIS
BootContious:
LCR #_fFlashProcess
LB BootContious
NOP
NOP
NOP
LRETR
