开发二次Bootloader功能，程序在擦除Flash的时候可能会出现崩溃的情况。
项目的cmd文件如下：
MEMORY
{
BOOT_RSVD : origin = 0x00000002, length = 0x00000126
RAMM0 : origin = 0x00000128, length = 0x000002D8
RAMM1 : origin = 0x00000400, length = 0x000003F8 /* on-chip RAM block M1 */
// RAMM1_RSVD : origin = 0x000007F8, length = 0x00000008 /* Reserve and do not use for code as per the errata advisory "Memory: Prefetching Beyond Valid Memory" */
/* RAMLS4 : origin = 0x0000A000, length = 0x00000800
RAMLS5 : origin = 0x0000A800, length = 0x00000800
RAMLS6 : origin = 0x0000B000, length = 0x00000800
RAMLS7 : origin = 0x0000B800, length = 0x00000800
RAMGS0 : origin = 0x0000C000, length = 0x000007F8
RAMGS0_RSVD : origin = 0x0000C7F8, length = 0x00000008 // Reserve and do not use for code as per the errata advisory "Memory: Prefetching Beyond Valid Memory"
*/
/* Combining all the LS RAMs and GS0 RAM */
RAML_Data : origin = 0x0000A000, length = 0x00001400
RAML_Prog : origin = 0x0000B400, length = 0x00001400
BOOTROM : origin = 0x003F0000, length = 0x00008000
BOOTROM_EXT : origin = 0x003F8000, length = 0x00007FC0
RESET : origin = 0x003FFFC0, length = 0x00000002
/* Flash sectors */
BEGIN_BOOT : origin = 0x080000, length = 0x000008 //,fill = 0xFFFF/* codestart */
BOOT_STARTFLAG : origin = 0x080008, length = 0x000010 //,fill = 0xFFFF/* bootloader flag */
BOOT_VERSION : origin = 0x080018, length = 0x000008 //,fill = 0xFFFF/* bootloader version*/
BOOT_FLASH : origin = 0x080020, length = 0x001FD0 //,fill = 0xFFFF/* bootloader code */
BOOT_DATETIME : origin = 0x081FF0, length = 0x000008 //,fill = 0xFFFF/* bootloader finish flag */
BOOT_FINISHFLAG : origin = 0x081FF8, length = 0x000008 //,fill = 0xFFFF/* bootloader finish flag */
APP1_BEGIN : origin = 0x082000, length = 0x000008 ,fill = 0xFFFF/* codestart */
APP1_STARTFLAG : origin = 0x082008, length = 0x000010 ,fill = 0xFFFF/* app1 flag */
APP1_VERSION : origin = 0x082018, length = 0x000008 ,fill = 0xFFFF/* app1 version*/
APP1_FLASH : origin = 0x082020, length = 0x006FD0 ,fill = 0xFFFF/* app1 code */
APP1_DATETIME : origin = 0x088FF0, length = 0x000008 ,fill = 0xFFFF/* app1 code */
APP1_FINISHFLAG : origin = 0x088FF8, length = 0x000008 ,fill = 0xFFFF/* app1 finish flag */
APP2_BEGIN : origin = 0x089000, length = 0x000008 //,fill = 0xFFFF/* codestart */
APP2_STARTFLAG : origin = 0x089008, length = 0x000010 //,fill = 0xFFFF/* app2 flag */
APP2_VERSION : origin = 0x089018, length = 0x000008 //,fill = 0xFFFF/* app2 version*/
APP2_FLASH : origin = 0x089020, length = 0x006FD0 //,fill = 0xFFFF/* app2 code */
APP2_DATETIME : origin = 0x08FFF0, length = 0x000008 //,fill = 0xFFFF/* app1 code */
APP2_FINISHFLAG : origin = 0x08FFF8, length = 0x000008 //,fill = 0xFFFF/* app2 finish flag */
// FLASH_BANK1_RSVD : origin = 0x0008FFF0, length = 0x00000010 /* Reserve and do not use for code as per the errata advisory "Memory: Prefetching Beyond Valid Memory" */
}
其中bootloader程序占据sector0~sector1
app1占据sector2~sector8
app2占据sector9~sector15
bootloader运行后检查app2是否有有效的程序代码：如果有则擦除app1区域，并将app2代码拷贝至app1区，然后擦除app2区域，最后跳转至app1运行；如果app2没有有效代码，则跳转至app1运行
CCS项目采用TI ROM提供的FlashAPI代码，项目中包含的库文件为：FlashAPI_F28002x_FPU32_ROM_EABI.lib
操作flash的关键代码如下：
//before using any FlashAPI ,Initalize it first
void Upgrade_Initialize_FlashAPI()
{
if(isFlashAPI_Initialized) return;
Fapi_StatusType oReturnCheck;
oReturnCheck = Fapi_initializeAPI(F021_CPU0_BASE_ADDRESS, DEVICE_SYSCLK_FREQ/1000000U);
if(oReturnCheck != Fapi_Status_Success) return;
oReturnCheck = Fapi_setActiveFlashBank(Fapi_FlashBank0);
if(oReturnCheck != Fapi_Status_Success) return;
isFlashAPI_Initialized = true;
}
//Erase single sector at address
#pragma CODE_SECTION(EraseSingleSector, ".TI.ramfunc");
Fapi_StatusType EraseSingleSector(Uint32 u32StartAddress)
{
Fapi_StatusType oReturnCheck;
Fapi_FlashStatusWordType oFlashStatusWord;
oReturnCheck = Fapi_issueAsyncCommandWithAddress(Fapi_EraseSector,(Uint32 *)u32StartAddress);
//wait uintil FSM is done with erase sector operation
while (Fapi_checkFsmForReady() != Fapi_Status_FsmReady)
{
ServiceDog();
}
if(oReturnCheck != Fapi_Status_Success) return oReturnCheck;
//verify the sector is erased
oReturnCheck = Fapi_doBlankCheck((Uint32 *)u32StartAddress,Sector8KB_u32length,&oFlashStatusWord);
return oReturnCheck;
}
//Program flash ,must reside in RAM
#pragma CODE_SECTION(Upgrade_ProgramFlash, ".TI.ramfunc");
Fapi_StatusType Upgrade_ProgramFlash(Uint32 u32StartAddress,uint16 *pu16DataBuffer,uint16 u16DataBufferSizeinWords)
{
Fapi_StatusType oReturnCheck;
//Disable intterupt before programming
DINT;
oReturnCheck = Fapi_issueProgrammingCommand((Uint32*)u32StartAddress,pu16DataBuffer,u16DataBufferSizeinWords,0,0,Fapi_AutoEccGeneration);
//wait uintil FSM is done with erase sector operation
while (Fapi_checkFsmForReady() != Fapi_Status_FsmReady)
{
ServiceDog();
}
// Fapi_getFsmStatus();
//Enable intterupt after programming
EINT;
return oReturnCheck;
}
//Erase sectors of boot
bool Upgrade_EraseSectorOfBoot()
{
Upgrade_Initialize_FlashAPI();
if(Fapi_Status_Success != EraseSingleSector(Bzero_Sector0_start)) return false;
if(Fapi_Status_Success != EraseSingleSector(Bzero_Sector1_start)) return false;
u16UpgradeFlag = Upgrade_Flag_Boot;
u32ProgramStartAddress = Boot_StartAddress;
u32ProgramEndAddress = Boot_EndAddress;
u32ProgrammingAddress = Boot_StartAddress;
return true;
}
//Erase sectors of App1
bool Upgrade_EraseSectorOfApp1()
{
DINT;
Upgrade_Initialize_FlashAPI();
if(Fapi_Status_Success != EraseSingleSector((Uint32)Bzero_Sector2_start)) return false;
if(Fapi_Status_Success != EraseSingleSector((Uint32)Bzero_Sector3_start)) return false;
if(Fapi_Status_Success != EraseSingleSector((Uint32)Bzero_Sector4_start)) return false;
if(Fapi_Status_Success != EraseSingleSector((Uint32)Bzero_Sector5_start)) return false;
if(Fapi_Status_Success != EraseSingleSector((Uint32)Bzero_Sector6_start)) return false;
if(Fapi_Status_Success != EraseSingleSector((Uint32)Bzero_Sector7_start)) return false;
if(Fapi_Status_Success != EraseSingleSector((Uint32)Bzero_Sector8_start)) return false;
u16UpgradeFlag = Upgrade_Flag_App1;
u32ProgramStartAddress = App1_StartAddress;
u32ProgramEndAddress = App1_EndAddress;
u32ProgrammingAddress = App1_StartAddress;
EINT;
return true;
}
//Erase sectors of App2
bool Upgrade_EraseSectorOfApp2()
{
DINT;
Upgrade_Initialize_FlashAPI();
if(Fapi_Status_Success != EraseSingleSector((Uint32)Bzero_Sector9_start)) return false;
if(Fapi_Status_Success != EraseSingleSector((Uint32)Bzero_Sector10_start)) return false;
if(Fapi_Status_Success != EraseSingleSector((Uint32)Bzero_Sector11_start)) return false;
if(Fapi_Status_Success != EraseSingleSector((Uint32)Bzero_Sector12_start)) return false;
if(Fapi_Status_Success != EraseSingleSector((Uint32)Bzero_Sector13_start)) return false;
if(Fapi_Status_Success != EraseSingleSector((Uint32)Bzero_Sector14_start)) return false;
if(Fapi_Status_Success != EraseSingleSector((Uint32)Bzero_Sector15_start)) return false;
u16UpgradeFlag = Upgrade_Flag_App2;
u32ProgramStartAddress = App2_StartAddress;
u32ProgramEndAddress = App2_EndAddress;
u32ProgrammingAddress = App2_StartAddress;
EINT;
return true;
}
//if App2 has valid app code,erase app1 sectors,copy app2 data to app1 data
void Upgrade_CheckUpgrade()
{
Uint32 u32Address_Read;
Uint32 u32Address_Write;
if(IsApp2_Valid())
{
//clear app1 data code
Upgrade_EraseSectorOfApp1();
//copy app2 to app1
u32Address_Read = App2_StartAddress;
u32Address_Write = App1_StartAddress;
while(u32Address_Read < App2_EndAddress)
{
Upgrade_ProgramFlash(u32Address_Write,(Uint16 *)u32Address_Read,8);
u32Address_Read += 8;
u32Address_Write += 8;
}
//clear app2 data code
Upgrade_EraseSectorOfApp2();
}
}
调用 Upgrade_EraseSectorOfApp2()函数，擦除Sector9后，在擦除sector10时程序进入ESTOP0
程序跟踪可以看到，调用的Fapi_issueAsynCommand 函数位于 0x3f8ec8
请问擦除后崩溃的原因可能是什么？
还有，如何将TI ROM中的FlashAPI代码放在RAM中执行？
