Other Parts Discussed in Thread: UNIFLASH
Tool/software:
When working with TMS320F28379DZWTS microcontroller, I encountered an issue when the board suddenly loses power. After repowering, the microcontroller does not run the program normally (indicated by unexpected EtherCAT disconnection). I suspect the DSP Flash data may be somehow changed from its origional content. So using TI UniFlash tool, I read out the FLASH data, and compared it with the data read from another normal board. The result is they are identical! Then I reloaded the original ".out" program into the faulty board with UniFlash, the microcontroller works normally again. My program includes a spectial function with "init, read and write" operations on the FLASH memory using the FAPI interface, this function is activated whenever it detects a power-off (i.e. an input voltage decrease edge). So I suspect the issue above is related with this Flash operation function. After commenting out the FLASH operation code, the issue no longer occurs. So you see my guess is right.Below is my FLASH operation code, including initialization, erasing, and writing data:
uint8 Flash_Init()
{
Fapi_StatusType oReturnCheck;
// Gain pump semaphore
SeizeFlashPump();
EALLOW;
Flash0EccRegs.ECC_ENABLE.bit.ENABLE = 0x0;
EDIS;
EALLOW;
oReturnCheck = Fapi_initializeAPI(F021_CPU0_BASE_ADDRESS, 200); // for now keeping it out
if(oReturnCheck != Fapi_Status_Success)
{
return 1;
}
// Fapi_setActiveFlashBank function sets the Flash bank and FMC for further
// Flash operations to be performed on the bank
oReturnCheck = Fapi_setActiveFlashBank(Fapi_FlashBank0);
if(oReturnCheck != Fapi_Status_Success)
{
return 2;
}
EDIS;
return Fapi_Status_Success;
}
Uint16 Flash_Erase(Uint32 section_base_addr)
{
Fapi_StatusType oReturnCheck;
Fapi_FlashStatusWordType oFlashStatusWord;
EALLOW;
// Erase Sector selected
oReturnCheck = Fapi_issueAsyncCommandWithAddress(Fapi_EraseSector, (uint32 *)section_base_addr);
// Wait until FSM is done with erase sector operation
while (Fapi_checkFsmForReady() != Fapi_Status_FsmReady) {}
// Verify that Sector is erased.
oReturnCheck = Fapi_doBlankCheck((uint32 *)section_base_addr, 0x1000, &oFlashStatusWord);
if(oReturnCheck != Fapi_Status_Success)
{
return 3;
}
EDIS;
return Fapi_Status_Success;
}
Uint16 Flash_Write(Uint32 section_base_addr, Uint16 *pBuff)
{
Fapi_StatusType oReturnCheck = Fapi_Status_Success;
EALLOW;
oReturnCheck = Fapi_issueProgrammingCommand((uint32 *)write_addr, pBuf, len, 0, 0, Fapi_AutoEccGeneration);
while(Fapi_checkFsmForReady() == Fapi_Status_FsmBusy);
if(oReturnCheck != Fapi_Status_Success)
{
// Check Flash API documentation for possible errors
return 4;
}
DELAY_US(10L);
EDIS;
return Fapi_Status_Success;
}
