CCS v5中烧写Flash实录：成功+失败
记于2013年08月23日
环境：Win7 + CCS v5 + XDS100v2仿真器 + TMS320CF2812芯片
烧写方法：将SRAM.cmd替换成FLASH.cmd。一个通用的用于F2812的 FLASH.cmd 例子为
MEMORY
{
PAGE 0 :
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
FLASHB : origin = 0x3F4000, length = 0x002000
FLASHA : origin = 0x3F6000, length = 0x001FF6
BEGIN : origin = 0x3F7FF6, length = 0x000002
PASSWDS : origin = 0x3F7FF8, length = 0x000008
ROM : origin = 0x3FF000, length = 0x000FC0
VECTORS : origin = 0x3FFFC2, length = 0x00003E
PAGE 1 :
/* SARAM */
RAMM0M1 : origin = 0x000000, length = 0x000800
/* Peripheral Frame 0: */
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
/* Peripheral Frame 1: */
ECAN_A : origin = 0x006000, length = 0x000100
ECAN_AMBOX : origin = 0x006100, length = 0x000100
/* Peripheral Frame 2: */
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
GPIODAT : origin = 0x0070E0, length = 0x000020
ADC : origin = 0x007100, length = 0x000020
EV_A : origin = 0x007400, length = 0x000040
EV_B : origin = 0x007500, length = 0x000040
SPI_B : origin = 0x007740, length = 0x000010
SCI_B : origin = 0x007750, length = 0x000010
MCBSP_A : origin = 0x007800, length = 0x000040
/* CSM Password Locations */
CSM_PWL : origin = 0x3F7FF8, length = 0x000008
/* SARAM */
RAML0L1 : origin = 0x008000, length = 0x002000
RAMH0 : origin = 0x3F8000, length = 0x002000
}
SECTIONS
{
/* Allocate program areas: */
.reset : > BEGIN PAGE = 0
vectors : > VECTORS PAGE = 0
.cinit : > FLASHJ PAGE = 0
.text : > FLASHA PAGE = 0
/* Allocate data areas: */
.stack : > RAMM0M1 PAGE = 1
.bss : > RAML0L1 PAGE = 1
.ebss : > RAML0L1 PAGE = 1
.const: load = FLASHB PAGE 0, run = RAML0L1 PAGE 1
{
/* Get Run Address */
__const_run = .;
/* Mark Load Address*/
*(.c_mark)
/* Allocate .const */
*(.const)
/* Compute Length */
__const_length = .-__const_run;
}
.econst: load = FLASHB PAGE 0, run = RAML0L1 PAGE 1
{
/* Get Run Address */
__econst_run = .;
/* Mark Load Address*/
*(.ec_mark)
/* Allocate .const */
*(.econst)
/* Compute Length */
__econst_length = .-__econst_run;
}
.sysmem : > RAMH0 PAGE = 1
/* Allocate IQ math areas: */
IQmath : > FLASHI PAGE = 0 /* Math Code */
IQmathFastTables : > FLASHI PAGE = 0 /* Math Tables in fast memory */
IQmathTables : > ROM PAGE = 0 /* Math Tables In ROM */
/* 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
CpuTimer1RegsFile : > CPU_TIMER1 PAGE = 1
CpuTimer2RegsFile : > CPU_TIMER2 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
}
重新编译OK！
点击Debug进入调试，点击Load Program...选择刚编译生成的*.out文件进行烧写！然后会出现Erase……
烧写成功！
=============== 悲剧 ================
为了调试方便，我设置了点击Debug按钮后自动装载程序，悲剧就在这时发生了！
在一次烧写时由于鼠标抖动，连续点了两次Debug，弹出两个烧写进度条，结果发大了，直接烧写失败，Flash锁死！如下
C28xx: Flash Programmer: Device is locked or not connected. Operation cancelled.
C28xx: Trouble Writing Memory Block at 0x3f7ff6 on Page 0 of Length 0x2
C28xx: GEL: File: E:\dsp\zx_dsp2000\zx_project_c2000\Debug\zx_project_c2000.out: Load failed.
为吸取经验教训，总结了Flash锁死的可能原因，以后注意这些方面：
（1）由于PC的原因，这里就是这样，中途打断了Flash的烧写过程造成Flash锁死。仿真器在烧写时挂起也会造成Flash锁死，比如有些仿真器速度比较慢，很容易发生挂起的现象。
（2）由于DSP的原因，DSP的电压、时钟等操作条件不对容易造成锁死。
另外，顺便注意DSP与JTAG的上电顺序：
关闭电源开关 ——> JTAG连接DSP ——> DSP连接PC，JTAG连接PC ——> 开启DSP电源开关，给DSP上电
原则：JTAG不能热插拔
================ 喜剧 ===============
不过还好，毕竟是一块实验板，Flash锁死但还可以从SRAM跑程序，谢天谢地！
有关Flash Lock的问题参考：
[1] http://e2e.ti.com/support/microcontrollers/c2000/f/171/t/248836.aspx