CCS/TMS320F28075: flash can't be written

Tool/software: Code Composer Studio

Hi Expert,

I used TI example project  below to develop  programming flash through SCI bootrom .

C:\ti\c2000\C2000Ware_3_02_00_00\device_support\f2807x\examples\cpu1\F2807x_sci_flash_kernel\cpu01

But,  it seems that flash can't be written. Read back data is 0xFFFF.  All oReturnCheck return is OK.

oReturnCheck = Fapi_issueAsyncCommandWithAddress(Fapi_EraseSector,  (uint32 *)(sectAddress[i]));

oReturnCheck = Fapi_doBlankCheck((uint32 *)(sectAddress[i]), sectSize[i],  &oFlashStatusWord);

    Buffer[0] = 0x1234;
    Buffer[1] = 0x5678;
    Buffer[2] = 0x90ab;
    Buffer[3] = 0xcdef;
    Buffer[4] = 0x1122;
    Buffer[5] = 0x3344;
    Buffer[6] = 0x5566;
    Buffer[7] = 0x7788;


u32Index = 0x80000;



                        oReturnCheck = Fapi_issueProgrammingCommand((uint32 *)u32Index, Buffer, sizeof(Buffer), 0, 0, Fapi_AutoEccGeneration);

  
                            while(Fapi_checkFsmForReady() == Fapi_Status_FsmBusy);

                                    if(oReturnCheck != Fapi_Status_Success)
                                    {
                                       while(!SciaRegs.SCICTL2.bit.TXEMPTY) { }
                                       SciaRegs.SCITXBUF.bit.TXDT = 0x62;
                                    }
                                    else
                                    {
                                        while(!SciaRegs.SCICTL2.bit.TXEMPTY) { }
                                        SciaRegs.SCITXBUF.bit.TXDT = 0x75;
                                    }

I used other device project to program flash,  for example  TMS320F28377S  , TMS320F28377D,  it is all right, no problem  .  Only TMS320F28075  can't write. 

I found the TMS320F2807x  project  using  TMS320F2837xD  F021 API.  I doubled  the API function running incorrectly