CCS/TMS570LS3137: FEE, write failure after 817 writes, status BUSY

Tool/software: Code Composer Studio

Dear team

My customer is using TMS570LS3137 FEE. 

1 Test the read function TI_Fee_ReadSync() separately, the return value is always E_OK;

2 Test the write function TI_Fee_WriteSync() separately. 

After 817 consecutive writes, the function will return E_NOT_OK, then the read status is BUSY, and the read status will be BUSY after an interval;

3 After the detection state is BUSY, re-initialize FEE, and then you can proceed with the write operation, but it is repeated after 816 consecutive writes.

Please help.

int main(void)
{
    uint16 pos_No = 0;
    uint16 read_pos_No = 0;        eepromInit();
    while (1)
    {
        sciPrintf("\n->write %d", pos_No);
        eepromWrite(2, (uint8 *)&pos_No);

        TI_Fee_ReadSync(2, 0, (uint8 *)&read_pos_No, 2);
        sciPrintf("\n->read %d", read_pos_No);

        delay_ms(300);
        pos_No++;
    }
}

uint8 eepromWrite(uint16 block, uint8 *data)
{
    Std_ReturnType error = E_OK;
    TI_FeeModuleStatusType status;

    error = TI_Fee_WriteSync(block, data);
    
    if (error != E_OK)
    {
        status = TI_Fee_GetStatus(0);

        printEEPROMStatus(block, status);

        eepromInit();
    }

    return error;
}

void printEEPROMStatus(uint16 block, TI_FeeModuleStatusType status)
{
    switch (status)
    {
    case UNINIT:
        sciPrintf("UNINIT");
        break;
    case IDLE:
        sciPrintf("IDLE");
        break;
    case BUSY:
        sciPrintf("BUSY");
        break;
    case BUSY_INTERNAL:
        sciPrintf("BUSY_INTERNAL");
        break;
    default:
        break;
    }
}