Flash的烧写是实现仿真器的脱离工作，使得DSP上电自动运行的过程，下面我介绍一下对于工程文件的配置，下载步骤很简单，我用的是3.3版本，选择工具F28xx On-Ship Flash Programmer 配置相关信息就可以实现下载；
下面主要介绍对于文件的修改：
首先得准备两个文件：DSP281x_CodeStartBranch.asm和f2812_nonBIOS_flash.cmd
文件内容如下：
DSP281x_CodeStartBranch.asm
***********************************************************************
WD_DISABLE .set 1 ;set to 1 to disable WD, else set to 0
.ref _c_int00
***********************************************************************
* 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 _c_int00 ;Branch to start of boot.asm in RTS library
.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 _c_int00 ;Branch to start of boot.asm in RTS library
.endif
;end wd_disable
.end
; end of file CodeStartBranch.asm
f2812_nonBIOS_flash.cmd
/**********************************************************************
* File: f2812.cmd -- Linker command file for Boot to Flash bootmode.
* History: 09/08/03 - original (based on DSP28 header files v1.00, D. Alter)
**********************************************************************/
MEMORY
{
PAGE 0: /* Program Memory */
//ZONE0 : origin = 0x002000, length = 0x002000 /* XINTF zone 0 */
//ZONE1 : origin = 0x004000, length = 0x002000 /* XINTF zone 1 */
RAML0 : origin = 0x008000, length = 0x001000 /* on-chip RAM block L0 */
OTP : origin = 0x3D7800, length = 0x000800 /* on-chip OTP */
FLASH_IJ : origin = 0x3D8000, length = 0x004000 /* on-chip FLASH */
FLASH_GH : origin = 0x3DC000, length = 0x008000 /* on-chip FLASH */
FLASH_EF : origin = 0x3E4000, length = 0x008000 /* on-chip FLASH */
FLASH_CD : origin = 0x3EC000, length = 0x008000 /* on-chip FLASH */
FLASH_AB : origin = 0x3F4000, length = 0x003F80 /* on-chip FLASH */
CSM_RSVD : origin = 0x3F7F80, length = 0x000076 /* Part of FLASHA. Reserved when CSM is in use. */
BEGIN_FLASH : origin = 0x3F7FF6, length = 0x000002 /* Part of FLASHA. Used for "boot to flash" bootloader mode. */
PASSWORDS : origin = 0x3F7FF8, length = 0x000008 /* Part of FLASHA. CSM password locations. */
BEGIN_H0 : origin = 0x3F8000, length = 0x000002 /* Part of H0. Used for "boot to H0" bootloader mode. */
/* ZONE7 : origin = 0x3FC000, length = 0x003FC0 /* XINTF zone 7 available if MP/MCn=1 */
ROM : origin = 0x3FF000, length = 0x000FC0 /* boot ROM available if MP/MCn=0 */
RESET : origin = 0x3FFFC0, length = 0x000002 /* part of boot ROM (MP/MCn=0) or XINTF zone 7 (MP/MCn=1) */
VECTORS : origin = 0x3FFFC2, length = 0x00003E /* part of boot ROM (MP/MCn=0) or XINTF zone 7 (MP/MCn=1) */
PAGE 1 : /* Data Memory */
RAMM0 : origin = 0x000000, length = 0x0000400 /* on-chip RAM block M0 */
/* RAMM01 : origin = 0x000040, length = 0x0003C0*/
RAMM1 : origin = 0x000400, length = 0x000400 /* on-chip RAM block M1 */
DEV_EMU : origin = 0x000880, length = 0x000180 /* Device emulation registers */
FLASH_REGS : origin = 0x000A80, length = 0x000060 /* FLASH registers */
CSM : origin = 0x000AE0, length = 0x000010 /* Code security module registers */
XINTF : origin = 0x000B20, length = 0x000020 /* External interface registers */
CPU_TIMER0 : origin = 0x000C00, length = 0x000008 /* CPU Timer0 registers (CPU Timer1 and Timer2 are reserved for BIOS)*/
PIE_CTRL : origin = 0x000CE0, length = 0x000020 /* PIE control registers */
PIE_VECT : origin = 0x000D00, length = 0x000100 /* PIE vector table */
ECAN_A : origin = 0x006000, length = 0x000100 /* eCAN registers */
ECAN_AMBOX : origin = 0x006100, length = 0x000100 /* eCAN mailboxes */
SYSTEM : origin = 0x007010, length = 0x000020 /* System control registers */
SPI_A : origin = 0x007040, length = 0x000010 /* SPI registers */
SCI_A : origin = 0x007050, length = 0x000010 /* SCI-A registers */
XINTRUPT : origin = 0x007070, length = 0x000010 /* External interrupt registers */
GPIOMUX : origin = 0x0070C0, length = 0x000020 /* GPIO mux registers */
GPIODAT : origin = 0x0070E0, length = 0x000020 /* GPIO data registers */
ADC : origin = 0x007100, length = 0x000020 /* ADC registers */
EV_A : origin = 0x007400, length = 0x000040 /* Event Manager A registers */
EV_B : origin = 0x007500, length = 0x000040 /* Event Manager B registers */
SCI_B : origin = 0x007750, length = 0x000010 /* SCI-B registers */
MCBSP_A : origin = 0x007800, length = 0x000040 /* McBSP registers */
RAML1 : origin = 0x009000, length = 0x001000 /* on-chip RAM block L1 */
CSM_PWL : origin = 0x3F7FF8, length = 0x000008 /* CSM password locations in FLASHA */
//ZONE2 : origin = 0x080000, length = 0x080000
RAMH0 : origin = 0x3F8002, length = 0x001FFE /* H0 SARAM */
ZONE6 : origin = 0x100000, length = 0x080000 /* XINTF zone 6 */
}
SECTIONS
{
/*** Compiler Required Sections ***/
/* Program memory (PAGE 0) sections */
.text : > FLASH_AB, PAGE = 0
.cinit : > FLASH_CD, PAGE = 0
.pinit : > FLASH_CD, PAGE = 0
.reset : > RESET, PAGE = 0, TYPE = DSECT /* We are not using the .reset section */
/* Data Memory (PAGE 1) sections */
.cio : > RAML1, PAGE = 1
.bss : > RAML1, PAGE = 1 /* Should be empty with large memory model */
.ebss : > RAMH0, PAGE = 1
.const : > FLASH_CD, PAGE = 0 /* Should be empty with large memory model */
.econst : > FLASH_CD, PAGE = 0
.stack : > RAMM1, PAGE = 1
.sysmem : > RAMH0, PAGE = 1 /* Should be empty with large memory model */
.esysmem : > RAMH0, PAGE = 1
.switch : > FLASH_CD, PAGE = 0
/*** User Defined Sections ***/
codestart : > BEGIN_FLASH, PAGE = 0 /* Used by file CodeStartBranch.asm */
csm_rsvd : LOAD = CSM_RSVD, PAGE = 0 /* Used by file passwords.asm */
passwords : LOAD = PASSWORDS, PAGE = 0 /* Used by file passwords.asm */
pie_vect : > PIE_VECT, PAGE = 1
secureRamFuncs : LOAD = FLASH_AB, PAGE = 0 /* Used by InitFlash() in SysCtrl.c */
RUN = RAML0, PAGE = 0
RUN_START(_secureRamFuncs_runstart),
LOAD_START(_secureRamFuncs_loadstart),
LOAD_END(_secureRamFuncs_loadend)
/*ramfuncs : LOAD = FLASH_AB, PAGE = 0*/ /* Used by InitFlash() in SysCtrl.c */
/*RUN = RAML0, PAGE = 0
RUN_START(_ramfuncs_runstart),
LOAD_START(_ramfuncs_loadstart),
LOAD_END(_ramfuncs_loadend)*/
ramdata : > RAMM0, PAGE = 1
/* .lcddata : > ZONE2, PAGE = 1
.disdata : > RAMH0, PAGE = 1
.disdata0 : > RAMH0, PAGE = 1
.Sint : > RAMH0, PAGE = 1
.Cost : > RAMH0, PAGE = 1 */
/**********************************************/
/* Allocate Peripheral Frame 0 Register Structures: */
DevEmuRegsFile : > DEV_EMU PAGE = 1
FlashRegsFile : > FLASH_REGS PAGE = 1
CsmRegsFile : > CSM PAGE = 1
XintfRegsFile : > XINTF PAGE = 1
CpuTimer0RegsFile : > CPU_TIMER0 PAGE = 1
PieCtrlRegsFile : > PIE_CTRL PAGE = 1
PieVectTable : > PIE_VECT PAGE = 1
/* Allocate Peripheral Frame 2 Register Structures: */
ECanaRegsFile : > ECAN_A PAGE = 1
ECanaMboxesFile : > ECAN_AMBOX PAGE = 1
/* Allocate Peripheral Frame 1 Register Structures: */
SysCtrlRegsFile : > SYSTEM PAGE = 1
SpiaRegsFile : > SPI_A PAGE = 1
SciaRegsFile : > SCI_A PAGE = 1
XIntruptRegsFile : > XINTRUPT PAGE = 1
GpioMuxRegsFile : > GPIOMUX PAGE = 1
GpioDataRegsFile : > GPIODAT PAGE = 1
AdcRegsFile : > ADC PAGE = 1
EvaRegsFile : > EV_A PAGE = 1
EvbRegsFile : > EV_B PAGE = 1
ScibRegsFile : > SCI_B PAGE = 1
McbspaRegsFile : > MCBSP_A PAGE = 1
/* CSM Password Locations */
CsmPwlFile : > CSM_PWL PAGE = 1
}
DSP281x_CodeStartBranch.asm这个文件不用修改，f2812_nonBIOS_flash.cmd这个文件看你自己的实际情况了，贴出来的这个在我的2812上是直接可用的，要是下载后程序运行不起来，那得仔细看下这个文件了
在文件中的修改如下：
#pragma CODE_SECTION (InitFlash, "secureRamFuncs");
void InitFlash(void)
{
asm(" EALLOW"); // Enable EALLOW protected register access
FlashRegs.FPWR.bit.PWR = 3; // Pump and bank set to active mode
FlashRegs.FSTATUS.bit.V3STAT = 1; // Clear the 3VSTAT bit
FlashRegs.FSTDBYWAIT.bit.STDBYWAIT = 0x01FF; // Sleep to standby transition cycles
FlashRegs.FACTIVEWAIT.bit.ACTIVEWAIT = 0x01FF; // Standby to active transition cycles
FlashRegs.FBANKWAIT.bit.RANDWAIT = 5; // Random access waitstates
FlashRegs.FBANKWAIT.bit.PAGEWAIT = 5; // Paged access waitstates
FlashRegs.FOTPWAIT.bit.OPTWAIT = 5; // Random access waitstates
FlashRegs.FOPT.bit.ENPIPE = 1; // Enable the flash pipeline
asm(" EDIS"); // Disable EALLOW protected register access
/*** Force a complete pipeline flush to ensure that the write to the last register
configured occurs before returning. Safest thing is to wait 8 full cycles. ***/
asm(" RPT #7 || NOP");
}
把这段代码放到DSP28_SysCtrl.c文件中，开始的地方就可以；
然后在你的主程序文件中添加如下：
extern Uint16 secureRamFuncs_runstart;
extern Uint16 secureRamFuncs_loadstart;
extern Uint16 secureRamFuncs_loadend;
在main.c中的InitSysCtrl()之后添加：
memcpy(&secureRamFuncs_runstart,
&secureRamFuncs_loadstart,
&secureRamFuncs_loadend - &secureRamFuncs_loadstart);
/*FLASH 初始化 */
InitFlash();
往下你就可以写你自己的程序了；
在测试过程中，你可以找个GPIO口输出0,1看看板子是否跑起来了；
注意：下载完后，断开仿真器，板子断电，拔掉仿真器，板子重新上电，查看GPIO口；
