LPC1768 and LPC1788 USB Differences

Hi all,

My USB Host Driver working fine with LPC1768 for USB HID Devices.
But I want to use this driver with LPC1788(On Embedded Artist Board) its doesnt work.
LPC1788 works fine with USB Host Lite sample.
And I use this sammple's Hardware init function but my driver didnt work.

I have a Hardware Init block.
It looks like :

#if IC == 1788

#define USBControlReg                           (LPC_USB->Control)
#define USBOTGStatusControlReg                  (LPC_USB->StCtrl)
#define USBInterruptStatusReg                   (LPC_USB->InterruptStatus)
#define USBControlHeadEDReg                     (LPC_USB->ControlHeadED)
#define USBBulkHeadEDReg                        (LPC_USB->BulkHeadED)
#define USBCommandStatusReg                     (LPC_USB->CommandStatus)
#define USBFMIntervalReg                        (LPC_USB->FmInterval)
#define USBPeriodicStartReg                     (LPC_USB->PeriodicStart)
#define USBRhStatusReg                          (LPC_USB->RhStatus)
#define USBHCCAReg                              (LPC_USB->HCCA)
#define USBInterruptEnableReg                   (LPC_USB->InterruptEnable)
#define USBRhPortStatus1Reg                     (LPC_USB->RhPortStatus1)

#elif (IC == 1768)

#define USBControlReg                           (LPC_USB->HcControl)
#define USBOTGStatusControlReg                  (LPC_USB->OTGStCtrl)
#define USBInterruptStatusReg                   (LPC_USB->HcInterruptStatus)
#define USBControlHeadEDReg                     (LPC_USB->HcControlHeadED)
#define USBBulkHeadEDReg                        (LPC_USB->HcBulkHeadED)
#define USBCommandStatusReg                     (LPC_USB->HcCommandStatus)
#define USBFMIntervalReg                        (LPC_USB->HcFmInterval)
#define USBPeriodicStartReg                     (LPC_USB->HcPeriodicStart)
#define USBRhStatusReg                          (LPC_USB->HcRhStatus)
#define USBHCCAReg                              (LPC_USB->HcHCCA)
#define USBInterruptEnableReg                   (LPC_USB->HcInterruptEnable)
#define USBRhPortStatus1Reg                     (LPC_USB->HcRhPortStatus1)

#else
#error "Undefined IC"
#endif
PRIVATE void hwInit(HCCA *cca)
{
  NVIC_DisableIRQ(USB_IRQn);

  // turn on power for USB
  CLKPWR_ConfigPPWR(CLKPWR_PCONP_PCUSB, ENABLE);

  // Enable USB host clock, port selection and AHB clock
  USBClockControlReg |= CLOCK_MASK;

  // Wait for clocks to become available
  while ((USBClockStatusReg & CLOCK_MASK) != CLOCK_MASK);

  //  We are a Host
  USBOTGStatusControlReg |= 1;

  configuratePins();

  //  Reset OHCI block
  USBControlReg = 0;
  USBControlHeadEDReg = 0;
  USBBulkHeadEDReg = 0;

  USBCommandStatusReg = HostControllerReset;
  USBFMIntervalReg = DEFAULT_FMINTERVAL;
  USBPeriodicStartReg = FRAMEINTERVAL * 90 / 100;

  USBControlReg = (USBControlReg & (~HostControllerFunctionalState)) | OperationalMask;
  USBRhStatusReg = SetGlobalPower;

  USBHCCAReg = (U32)cca;
  USBInterruptStatusReg |= USBInterruptStatusReg;
  USBInterruptEnableReg = MasterInterruptEnable |
                          WritebackDoneHead     |
                          RootHubStatusChange   |
                          FrameNumberOverflow;

  NVIC_SetPriority(USB_IRQn, 0);
  NVIC_EnableIRQ(USB_IRQn);

  // 10ms delay before diving in
  hostDelayMS(10);
}

There is All hardware dependent code.
But system not work same with LPC1768 and LPC1788.

Is there any difference between LPC1768 and LPC1788 USB unit?

Thanks.