TMS570LC4357: Flash Erase

Mark Samarin

Part Number: TMS570LC4357

Still waiting for your marketing department to send an NDA so that we can see the library source code. We cannot use the F021 Library for certification reasons.

I am trying to erase a FLASH sector and I get a PCV error. Do I need to precondition the FLASH somehow? Am I accessing the UNDOCUMENTED FsmSector register correctly?

Test call:

CpfSelectFlashBank(1); // Verified: FMAC == 1
CpfEraseSector(1, 0); // FAILS: PCV == 1

static void CpfEraseSector(UINT32 uBankNum, UINT32 uSectorNum)
{

   ASSERT(uBankNum==1)
   while (CpfIsBankBusy(uBankNum));      // TODO: add timeout

   // Set FBSE - 1's = sector enabled for Wr/Erase
   // ------------------------------------------------
   cpfL2F -> Fbprot.u32Register = 1;              // Enable FBSE access
   cpfL2F -> Fbse.u32Register = (UINT32)0xFFFF;        // Enable all sectors
   cpfL2F -> Fbprot.u32Register = 0;              // Disable FBSE access

   CpfClearStatus();

   // Set Write enable to sector to be erased only
   // ----------------------------------------------------------
   cpfL2F -> FsmWrEna.u32Register = 5;                   // Enables access to FSM_SECTOR
   UINT32 uMask = ~(0x10000<<uSectorNum);
   cpfL2F -> FsmSector.u32Register = uMask;              // UNDOCUMENTED REGISTER: High bits seem to map to FSM_SECTOR1
   cpfL2F -> FsmWrEna.u32Register = 0;                   // Disables access to FSM_SECTOR

   // Set address register to any within sector
   cpfL2F -> Faddr.u32Register = (0x00200000 * uBankNum) + 0x20000 * uSectorNum;

   CpfSetCmd(F021Cmd_EraseSector);     // COMMAND = ERASE_SECTOR
   CpfExecute();                       // GO
}