text: /******************************************************************************
  *
  * Copyright (C) 2018 Xilinx, Inc.  All rights reserved.
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
  * in the Software without restriction, including without limitation the rights
  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  * copies of the Software, and to permit persons to whom the Software is
  * furnished to do so, subject to the following conditions:
  *
  * The above copyright notice and this permission notice shall be included in
  * all copies or substantial portions of the Software.
  *
  * Use of the Software is limited solely to applications:
  * (a) running on a Xilinx device, or
  * (b) that interact with a Xilinx device through a bus or interconnect.
  *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  * XILINX BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
  * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
  * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  * SOFTWARE.
  *
  * Except as contained in this notice, the name of the Xilinx shall not be used
  * in advertising or otherwise to promote the sale, use or other dealings in
  * this Software without prior written authorization from Xilinx.
  *
  ******************************************************************************/
  /*****************************************************************************/
  /**
  *
  * @file idt_8t49n24x.c
  * @addtogroup IDT_8T49N24x
  * @{
  * <pre>
  *
  * MODIFICATION HISTORY:
  *
  * Ver   Who    Date     Changes
  * ----- ------ -------- --------------------------------------------------
  * X.XX  XX     YY/MM/DD
  * 1.00  RHe    16/06/20 Initial release. A ported version from the
  *                       8T49N28X-FrequencyProgrammingGuide-register-
  *                       calculations.py script
  * 2.00  MG     16/08/15 Major update
  * 2.10  MG     16/09/05 Added LOS variable
  * </pre>
  *
  ******************************************************************************/
  
  /***************************** Include Files *********************************/
  #include "idt_8t49n24x.h"
  
  #include "xiic.h"
  #include "xil_types.h"
  #include "xil_assert.h"
  #include "xstatus.h"
  #include "microblaze_sleep.h"
  #include <stdlib.h>
  #include <math.h>
  
  /************************** Constant Definitions *****************************/
  
  /***************** Macros (Inline Functions) Definitions *********************/
  
  /**************************** Type Definitions *******************************/
  
  /************************** Function Prototypes ******************************/
  static u8 IDT_8T49N24x_GetRegister(u32 I2CBaseAddress, u8 I2CSlaveAddress,
  				u16 RegisterAddress);
  static int IDT_8T49N24x_SetRegister(u32 I2CBaseAddress, u8 I2CSlaveAddress,
  				u16 RegisterAddress, u8 Value);
  static int IDT_8T49N24x_ModifyRegister(u32 I2CBaseAddress, u8 I2CSlaveAddress,
  				u16 RegisterAddress, u8 Value, u8 Mask);
  static int IDT_8T49N24x_CheckDeviceID(u32 I2CBaseAddress, u8 I2CSlaveAddress);
  //static int IDT_8T49N24x_GPIO(u32 I2CBaseAddress, u8 I2CSlaveAddress);
  //static int IDT_8T49N24x_OutputDriver(u32 I2CBaseAddress, u8 I2CSlaveAddress,
  //				u8 Output, u8 Enable);
  //static int IDT_8T49N24x_LockMode(u32 I2CBaseAddress, u8 I2CSlaveAddress);
  static int IDT_8T49N24x_InputMonitorControl(u32 I2CBaseAddress,
  				u8 I2CSlaveAddress, u32 Value, u8 Input);
  static int IDT_8T49N24x_PreDivider(u32 I2CBaseAddress, u8 I2CSlaveAddress,
  				u32 Value, u8 Input);
  static int IDT_8T49N24x_M1Feedback(u32 I2CBaseAddress, u8 I2CSlaveAddress,
  				u32 Value, u8 Input);
  static int IDT_8T49N24x_DSMInteger(u32 I2CBaseAddress, u8 I2CSlaveAddress,
  				u16 Value);
  static int IDT_8T49N24x_DSMFractional(u32 I2CBaseAddress, u8 I2CSlaveAddress,
  				u32 Value);
  static int IDT_8T49N24x_OutputDividerInteger(u32 I2CBaseAddress,
  				u8 I2CSlaveAddress, u32 Value, u8 Output);
  static int IDT_8T49N24x_OutputDividerFractional(u32 I2CBaseAddress,
  				u8 I2CSlaveAddress, u32 Value, u8 Output);
  static int IDT_8T49N24x_Mode(u32 I2CBaseAddress, u8 I2CSlaveAddress,
  				u8 Synthesizer);
  //static int IDT_8T49N24x_SelectInputReference(u32 I2CBaseAddress,
  //				u8 I2CSlaveAddress, u8 Input);
  static int IDT_8T49N24x_GetIntDivTable(int FOut, int *DivTable, u8 Bypass);
  static int IDT_8T49N24x_CalculateSettings(int FIn, int FOut,
  				IDT_8T49N24x_Settings* RegSettings);
  static int IDT_8T49N24x_Enable(u32 I2CBaseAddress, u8 I2CSlaveAddress,
  				u8 Enable);
  static int IDT_8T49N24x_ReferenceInput(u32 I2CBaseAddress, u8 I2CSlaveAddress,
  				u8 Input, u8 Enable);
  //static int IDT_8T49N24x_Configure(u32 I2CBaseAddress, u8 I2CSlaveAddress);
  static int IDT_8T49N24x_Configure_JA(u32 I2CBaseAddress, u8 I2CSlaveAddress);
  /************************** Variable Definitions *****************************/
  
  /************************** Function Definitions *****************************/
  
  /*****************************************************************************/
  /**
  *
  * This function reads a single byte to the IDT 8T49N24x  
  *
  * @param I2CBaseAddress is the baseaddress of the I2C core.
  * @param I2CSlaveAddress is the 7-bit I2C slave address.
  *
  * @return
  *    - XST_SUCCESS Initialization was successful.
  *    - XST_FAILURE I2C write error.
  *
  * @note None.
  *
  ******************************************************************************/
  static u8 IDT_8T49N24x_GetRegister(u32 I2CBaseAddress, u8 I2CSlaveAddress,
  			u16 RegisterAddress)
  {
  	u32 ByteCount = 0;
  	u8 Buffer[2];
  	u8 Data;
  	u8 Retry = 0;
  	u8 Exit;
  
  	Exit = FALSE;
  	Data = 0;
  
  	do {
  		/* Set Address */
  		Buffer[0] = (RegisterAddress >> 8); 
  		Buffer[1] = RegisterAddress & 0xff; 
  		ByteCount = XIic_Send(I2CBaseAddress, I2CSlaveAddress,
  				(u8*)Buffer, 2, XIIC_REPEATED_START);
  
  		if (ByteCount != 2) {
  			Retry++;
  			
  			/* Maximum retries */
  			if (Retry == 255) {
  				Exit = TRUE;
  			}
  		} else {
  			/* Read data */
  			ByteCount = XIic_Recv(I2CBaseAddress, I2CSlaveAddress,
  						(u8*)Buffer, 1, XIIC_STOP);
  			if (ByteCount != 1) {
  				Exit = FALSE;
  			} else {
  				Data = Buffer[0];
  				Exit = TRUE;
  			}
  		}
  	} while (!Exit);
  
  	return Data;
  }
  
  /*****************************************************************************/
  /**
  *
  * This function send a single byte to the IDT 8T49N24x  
  *
  * @param I2CBaseAddress is the baseaddress of the I2C core.
  * @param I2CSlaveAddress is the 7-bit I2C slave address.
  *
  * @return
  *    - XST_SUCCESS Initialization was successful.
  *    - XST_FAILURE I2C write error.
  *
  * @note None.
  *
  ******************************************************************************/
  static int IDT_8T49N24x_SetRegister(u32 I2CBaseAddress, u8 I2CSlaveAddress,
  			u16 RegisterAddress, u8 Value)
  {
  	u32 ByteCount = 0;
  	u8 Buffer[3];
  	u8 Retry = 0;
  
  	/* Write data */
  	Buffer[0] = (RegisterAddress >> 8); 
  	Buffer[1] = RegisterAddress & 0xff; 
  	Buffer[2] = Value;
  	
  	while (1) {
  		ByteCount = XIic_Send(I2CBaseAddress, I2CSlaveAddress,
  					(u8*)Buffer, 3, XIIC_STOP);
  		if (ByteCount != 3) {
  			Retry++;
  
  			/* Maximum retries */
  			if (Retry == 255) {
  				return XST_FAILURE;
  			}
  		} else {
  			return XST_SUCCESS;
  		}
  	}  
  }
  
  /*****************************************************************************/
  /**
  *
  * This function modifies a single byte to the IDT 8T49N24x  
  *
  * @param I2CBaseAddress is the baseaddress of the I2C core.
  * @param I2CSlaveAddress is the 7-bit I2C slave address.
  *
  * @return
  *    - XST_SUCCESS Initialization was successful.
  *    - XST_FAILURE I2C write error.
  *
  * @note None.
  *
  ******************************************************************************/
  static int IDT_8T49N24x_ModifyRegister(u32 I2CBaseAddress, u8 I2CSlaveAddress,
  				u16 RegisterAddress, u8 Value, u8 Mask)
  {
  	u8 Data;
  	int Result;
  
  	/* Read data */
  	Data = IDT_8T49N24x_GetRegister(I2CBaseAddress, I2CSlaveAddress,
  					RegisterAddress);
  
  	/* Clear masked bits  */
  	Data &= ~Mask; 
  
  	/* Update */
  	Data |= (Value & Mask);
  
  	/* Write data */
  	Result = IDT_8T49N24x_SetRegister(I2CBaseAddress, I2CSlaveAddress,
  					RegisterAddress, Data);
  
  	return Result;
  }
  
  /*****************************************************************************/
  /**
  *
  * This function checks the IDT 8T49N24x device ID  
  *
  * @param I2CBaseAddress is the baseaddress of the I2C core.
  * @param I2CSlaveAddress is the 7-bit I2C slave address.
  *
  * @return
  *    - XST_SUCCESS Initialization was successful.
  *    - XST_FAILURE I2C write error.
  *
  * @note None.
  *
  ******************************************************************************/
  static int IDT_8T49N24x_CheckDeviceID(u32 I2CBaseAddress, u8 I2CSlaveAddress)
  {
  	u16 DeviceId;
  	u8 Data;
  
  	/* Get DEV_ID[15:12] */
  	Data = IDT_8T49N24x_GetRegister(I2CBaseAddress, I2CSlaveAddress,
  							0x0002);
  
  	/* Mask */
  	Data &= 0x0f;
  
  	/* Copy */
  	DeviceId = Data;
  
  	/* Shift */
  	DeviceId <<= 8;
  
  	/* Get DEV_ID[11:4] */
  	Data = IDT_8T49N24x_GetRegister(I2CBaseAddress, I2CSlaveAddress,
  							0x0003);
  
  	/* Copy */
  	DeviceId |= Data;
  
  	/* Shift */
  	DeviceId <<= 4;
  
  	/* Get DEV_ID[3:0] */
  	Data = IDT_8T49N24x_GetRegister(I2CBaseAddress, I2CSlaveAddress,
  							0x0004);
  
  	/* Copy */
  	DeviceId |= (Data >> 4);
  
  	/* Check */
  	if (DeviceId == 0x0606) {
  		return XST_SUCCESS;
  	} else {
  		return XST_FAILURE;
  	}
  }
  
  /* Get valid Integer output divider values */
  static int IDT_8T49N24x_GetIntDivTable(int FOut, int *DivTable, u8 Bypass)
  {
  	int NS1_Options[4] = {1,4,5,6};
  	int index;
  	int NS2Min = 1;
  	int NS2Max = 1;
  	
  	int NS2Temp;
  	int OutDivTemp;
  	u32 VCOTemp;
  	
  	int OutDivMin = (int)ceil(IDT_8T49N24X_FVCO_MIN/FOut);
  	int OutDivMax = (int)floor(IDT_8T49N24X_FVCO_MAX/FOut);
  	
  	int Count = 0;
  	int *DivTablePtr = DivTable;
  	
  	if (Bypass == TRUE) {
  		index = 0;
  	} else {
  		index = 1;
  	}
  	
  	for (int i = index; i < (sizeof(NS1_Options)/sizeof(int)); i++) {
  		if ((NS1_Options[i] == OutDivMin) || 
  		    (NS1_Options[i] == OutDivMax)) {
  			/* This is for the case where 
  			 * we want to bypass NS2.
  			 * */
  			NS2Min = 0;
  			NS2Max = 0;
  		}
  	}
  	
  	if (NS2Min == 1) {
  		/* If this test passes, then we know 
  		 * we're not in the bypass case */
  		NS2Min = (int)ceil(OutDivMin / NS1_Options[3] / 2); /* the last element in the list */
  		NS2Max = (int)floor(OutDivMax / NS1_Options[index] / 2);
  		if (NS2Max == 0)
  			/* Because we're rounding-down for the max, 
  			 * we may end-up with it being 0, 
  			 * In which case we need to make it 1.
  			 * */
  			NS2Max = 1; 
  	}
  	 
  	NS2Temp = NS2Min;
  	
  	while (NS2Temp <= NS2Max) {
  		for (int i = index ; 
  		     i < (sizeof(NS1_Options)/sizeof(int)) ;
  		     i++) {
  			if (NS2Temp == 0) {
  				OutDivTemp = NS1_Options[i];
  			} else {
  				OutDivTemp = NS1_Options[i] * NS2Temp * 2;
  			}
  			
  			VCOTemp = FOut * OutDivTemp;
  			
  			if ((VCOTemp <= IDT_8T49N24X_FVCO_MAX) &&
  			    (VCOTemp >= IDT_8T49N24X_FVCO_MIN)) {
  				*DivTablePtr = OutDivTemp;
  				Count++;
  				DivTablePtr++;
  			}
  		}
  		NS2Temp++;
  	}
  	
  	return Count;
  }
  
  /*****************************************************************************/
  /**
  *
  * This function calculates the settings  
  *
  * @param I2CBaseAddress is the baseaddress of the I2C core.
  * @param I2CSlaveAddress is the 7-bit I2C slave address.
  *
  * @return
  *    - XST_SUCCESS Initialization was successful.
  *    - XST_FAILURE I2C write error.
  *
  * @note None.
  *
  ******************************************************************************/
  static int IDT_8T49N24x_CalculateSettings(int FIn, int FOut, 
  				IDT_8T49N24x_Settings* RegSettings)
  {
  	int DivTable[20];
  	int DivTableCount;
  	
  	int MaxDiv = 0;
  	double FVCO;
  	int NS1_RegSettings;
  	int NS2_RegSettings;
  	
  	int NS1Ratio;
  	int NS2Ratio;
  	
  	double FracDiv;
  	
  	double UpperFBDiv;
  	int DSMInt_RegSettings;
  	int DSMFrac_RegSettings;
  	double Ratio;
  	
  	int LOS;
  
  	/* Get the valid integer dividers */
  	DivTableCount = IDT_8T49N24x_GetIntDivTable(FOut, DivTable, FALSE);
  	
  	/* Find the highest divider */
  	for (int i = 0 ; i < DivTableCount ; i++) {
  		if (MaxDiv < DivTable[i]) {
  			MaxDiv = DivTable[i];
  		}
  	}
  	
  	FVCO = (double)FOut * MaxDiv;
  	
  	/* **********************************************
  	* INTEGER DIVIDER: Determine NS1 register setting
  	* **********************************************/
  	
  	/* Only use the divide-by-1 option for really small divide ratios
  	 * note that this option will never be on the list for 
  	 * the Q0 - Q3 dividers
  	 * */
  	if (MaxDiv < 4) { 
  		
  	}
  	
  	/* Make sure we can divide the ratio by 4 in NS1 and
  	 * by 1 or an even number in NS2 */
  	if ((MaxDiv == 4) || (MaxDiv % 8 == 0)) { 
  		NS1_RegSettings = 2; /* Divide by 4 register selection */
  	}
  	
  	/* Make sure we can divide the ratio by 5 in NS1 and
  	 * by 1 or an even number in NS2 */
  	if ((MaxDiv == 5) || (MaxDiv % 10 == 0)) {
  		NS1_RegSettings = 0; /* Divide by 5 register selection */
  	}
  	
  	/* Make sure we can divide the ratio by 6 in NS1 and
  	 * by 1 or an even number in NS2 */
  	if ((MaxDiv == 6) || (MaxDiv % 12 == 0)) {
  		NS1_RegSettings = 1; /* Divide by 6 register setting */
  	}
  	
  	/* **********************************************
  	 * INTEGER DIVIDER: Determine NS2 register setting
  	 * *********************************************/
  	
  	switch (NS1_RegSettings) {
  		case (0) :
  			NS1Ratio = 5;
  		break;
  		
  		case (1) :
  			NS1Ratio = 6;
  		break;
  		
  		case (2) :
  			NS1Ratio = 4;
  		break;
  		
  		case (3) : /* This is the bypass (divide-by-1) option */
  			NS1Ratio = 1;
  		break;
  		
  		default :
  			NS1Ratio = 6;
  		break;
  	}
  	
  	NS2Ratio = (int)floor(MaxDiv / NS1Ratio);
  	
  	NS2_RegSettings = (int)floor(NS2Ratio/2);
  	
  	/* **********************************************
  	* FRACTIONAL DIVIDER:
  	* **********************************************/
  	FracDiv = FVCO/FOut;
  	
  	u32 N_Q2 = 0;
  	u32 NFRAC_Q2 = 0;
  
  	double frac_numerator = round(((FracDiv / 2.0) -
  				(int)(FracDiv / 2.0)) * pow(2,28));
  
  	/* This is the case where the fractional portion is 0.
  	 * Due to precision limitations, sometimes fractional portion
  	 * of the Effective divider gets rounded to 1.
  	 * This checks for that condition.
  	 * */
  	if ((frac_numerator >= 268435456) || 
  	    ((FracDiv/2.0) == (int)(FracDiv/2.0))) {
  		N_Q2 = (int)round(FracDiv / 2.0);
  		NFRAC_Q2 = 0;
  	} else { 
  		/* This is the case where the fractional portion is not 0. */
  		N_Q2 = (int)floor(FracDiv / 2.0);
  		NFRAC_Q2 = (int)frac_numerator;
  	}
  
  	/* ***********************************************
  	* Calculate the Upper Loop Feedback divider setting
  	* ***********************************************/
  	
  	UpperFBDiv = (double)(FVCO) / (2*IDT_8T49N24X_XTAL_FREQ);
  	DSMInt_RegSettings = (int)floor(UpperFBDiv);
  
  	DSMFrac_RegSettings = (int)round((UpperFBDiv - floor(UpperFBDiv))*pow(2,21));
  	
  	/* **********************************************
  	* Calculate the Lower Loop Feedback divider and Input Divider
  	* **********************************************/
  	
  	Ratio = FVCO/FIn;
  	
  	int M1 = 0;
  	int PMin = (int)FIn/IDT_8T49N24X_FPD_MAX;
  //	int M1Min = (int)(FVCO/IDT_8T49N24X_FPD_MAX); /* This M1 divider sets the input PFD frequency at 128KHz, the set max */
  	
  	int M1_default = 0;
  	int P_default = 0;
  	int error_tmp = 999999;
  	int error = 99999999;
  
  	int count = 0;
  
  	/* Start from lowest divider and iterate until 0 error 
  	 * is found or the divider limit is exhausted.
  	 * Keep the setting with the lowest error
  	 * */
  	for (int i = PMin; i <= IDT_8T49N24X_P_MAX; i++) {
  		M1 = (int)round(i*Ratio);
  		count++;
  		if (M1 < IDT_8T49N24X_M_MAX) {
  			error_tmp = (int)(Ratio*1e9 - (M1*1e9 / i));
  
  			if (abs(error_tmp) < error || error_tmp == 0) {
  				error = abs(error_tmp);
  				M1_default = M1;
  				P_default = i;
  
  				if (error_tmp == 0)
  					break;
  			}
  		}
  		else {
  			break;
  		}
  	}
  	
  	/* Calculate LOS */
  	LOS = FVCO / 8 / FIn; 
  	LOS = LOS + 3;
  	if (LOS < 6)
  		LOS = 6;
  
  	/* Copy registers */
  	RegSettings->NS1_Qx = NS1_RegSettings;
  	RegSettings->NS2_Qx = NS2_RegSettings;
  	
  	RegSettings->N_Qx = N_Q2;
  	RegSettings->NFRAC_Qx = NFRAC_Q2;
  
  	RegSettings->DSM_INT = DSMInt_RegSettings;
  	RegSettings->DSM_FRAC = DSMFrac_RegSettings;
  	RegSettings->M1_x = M1_default;
  	RegSettings->PRE_x = P_default;
  	RegSettings->LOS_x = LOS;
  
  	return XST_SUCCESS;
  }
  
  /*****************************************************************************/
  /**
  *
  * This function calculates and sets the IDT 8TN49N24x device with the 
  * given clock configuration.
  *
  * @param I2CBaseAddress is the baseaddress of the I2C core.
  * @param I2CSlaveAddress is the 7-bit I2C slave address.
  * @param FIn specifies the input frequency.
  * @param FOut specifies the output frequency.
  * @param FreeRun specifies if the operation mode is locked/synthesizer mode.
  *    - TRUE Synthesizer mode (Fout only)
  *    - FALSE Locked mode (Fout locked to Fin)
  *
  * @return
  *    - XST_SUCCESS Initialization was successful.
  *    - XST_FAILURE I2C write error or incorrect parameters detected.
  *
  * @note 
  *
  ******************************************************************************/
  int IDT_8T49N24x_SetClock(u32 I2CBaseAddress, u8 I2CSlaveAddress,
  				int FIn, int FOut, u8 FreeRun)
  {
  	int Result;
  
  	if ((FIn < IDT_8T49N24X_FIN_MIN) && (FIn > IDT_8T49N24X_FIN_MAX)) {
  		return XST_FAILURE;
  	}
  	
  	if ((FOut < IDT_8T49N24X_FOUT_MIN) && (FOut > IDT_8T49N24X_FOUT_MAX)) {
  		return XST_FAILURE;
  	}
  	
  	IDT_8T49N24x_Settings RegSettings;
  
  	/* Calculate settings	 */
  	IDT_8T49N24x_CalculateSettings(FIn, FOut, &RegSettings);
  
  	/* Disable DPLL and APLL calibration */
  	Result = IDT_8T49N24x_Enable(I2CBaseAddress, I2CSlaveAddress, FALSE);
  
  	usleep(300000);
  
  	/* Mode */
  	if (FreeRun == TRUE) {
  		/* Disable reference clock input 0 */
  		Result = IDT_8T49N24x_ReferenceInput(I2CBaseAddress,
  						I2CSlaveAddress, 0, FALSE);
  
  		/* Disable reference clock input 1 */
  		Result = IDT_8T49N24x_ReferenceInput(I2CBaseAddress,
  						I2CSlaveAddress, 1, FALSE);
  
  		/* Set synthesizer mode */
  		Result = IDT_8T49N24x_Mode(I2CBaseAddress,
  					   I2CSlaveAddress, TRUE);
  	} else {
  		/* Enable reference clock input 0 */
  		Result = IDT_8T49N24x_ReferenceInput(I2CBaseAddress,
  						I2CSlaveAddress, 0, TRUE);
  
  		/* Disable reference clock input 1 */
  		Result = IDT_8T49N24x_ReferenceInput(I2CBaseAddress,
  						I2CSlaveAddress, 1, FALSE);
  
  		/* Set jitter attentuator mode */
  		Result = IDT_8T49N24x_Mode(I2CBaseAddress,
  					I2CSlaveAddress, FALSE);
  	}
  
  	/* Pre-divider Input 0 */
  	Result = IDT_8T49N24x_PreDivider(I2CBaseAddress, I2CSlaveAddress,
  					 RegSettings.PRE_x, 0);
  
  	/* Pre-divider Input 1 */
  	Result = IDT_8T49N24x_PreDivider(I2CBaseAddress, I2CSlaveAddress,
  					 RegSettings.PRE_x, 1);
  
  	/* M1 feedback Input 0 */
  	Result = IDT_8T49N24x_M1Feedback(I2CBaseAddress, I2CSlaveAddress,
  					 RegSettings.M1_x, 0);
  
  	/* M1 feedback Input 1 */
  	Result = IDT_8T49N24x_M1Feedback(I2CBaseAddress, I2CSlaveAddress,
  					 RegSettings.M1_x, 1);
  
  	/* DSM integer */
  	Result = IDT_8T49N24x_DSMInteger(I2CBaseAddress, I2CSlaveAddress,
  					 RegSettings.DSM_INT);
  
  	/* DSM fractional */
  	Result = IDT_8T49N24x_DSMFractional(I2CBaseAddress, I2CSlaveAddress,
  					    RegSettings.DSM_FRAC);
  
  	/* Output divider integer output 2 */
  	Result = IDT_8T49N24x_OutputDividerInteger(I2CBaseAddress,
  						   I2CSlaveAddress,
  						   RegSettings.N_Qx, 2);
  
  	/* Output divider integer output 3 */
  	Result = IDT_8T49N24x_OutputDividerInteger(I2CBaseAddress,
  						   I2CSlaveAddress,
  						   RegSettings.N_Qx, 3);
  
  	/* Output divider fractional output 2 */
  	Result = IDT_8T49N24x_OutputDividerFractional(I2CBaseAddress,
  						      I2CSlaveAddress,
  						      RegSettings.NFRAC_Qx, 2);
  
  	/* Output divider fractional output 3 */
  	Result = IDT_8T49N24x_OutputDividerFractional(I2CBaseAddress,
  						      I2CSlaveAddress,
  						      RegSettings.NFRAC_Qx, 3);
  
  	/* Input monitor control 0 */
  	Result = IDT_8T49N24x_InputMonitorControl(I2CBaseAddress,
  						  I2CSlaveAddress,
  						  RegSettings.LOS_x, 0);
  
  	/* Input monitor control 1 */
  	Result = IDT_8T49N24x_InputMonitorControl(I2CBaseAddress,
  						  I2CSlaveAddress,
  						  RegSettings.LOS_x, 1);
  
  	/* Enable DPLL and APLL calibration */
  	Result = IDT_8T49N24x_Enable(I2CBaseAddress, I2CSlaveAddress, TRUE);
  
  	return Result;
  }
  
  /*****************************************************************************/
  /**
  *
  * This function set the input monitor control
  *
  * @param I2CBaseAddress is the baseaddress of the I2C core.
  * @param I2CSlaveAddress is the 7-bit I2C slave address.
  *
  * @return
  *    - XST_SUCCESS 
  *    - XST_FAILURE 
  *
  * @note None.
  *
  ******************************************************************************/
  static int IDT_8T49N24x_InputMonitorControl(u32 I2CBaseAddress,
  				u8 I2CSlaveAddress, u32 Value, u8 Input)
  {
  	int Result;
  	u8 Data;
  	u16 Address;
  
  	if (Input == 1)
  		Address = 0x0074;
  	else
  		Address = 0x0071;
  
  	/* LOSx[16] */
  	Data = (Value >> 16) & 0x1; 
  	Result = IDT_8T49N24x_SetRegister(I2CBaseAddress, I2CSlaveAddress,
  					  Address, Data);
  
  	/* LOSx[15:8] */
  	Data = (Value >> 8); 
  	Result = IDT_8T49N24x_SetRegister(I2CBaseAddress, I2CSlaveAddress,
  					  Address+1, Data);
  
  	/* LOSx[7:0] */
  	Data = (Value & 0xff); 
  	Result = IDT_8T49N24x_SetRegister(I2CBaseAddress, I2CSlaveAddress,
  					  Address+2, Data);
  
  	return Result;
  }
  
  /*****************************************************************************/
  /**
  *
  * This function set the pre-divider
  *
  * @param I2CBaseAddress is the baseaddress of the I2C core.
  * @param I2CSlaveAddress is the 7-bit I2C slave address.
  *
  * @return
  *    - XST_SUCCESS 
  *    - XST_FAILURE 
  *
  * @note None.
  *
  ******************************************************************************/
  static int IDT_8T49N24x_PreDivider(u32 I2CBaseAddress, u8 I2CSlaveAddress,
  					u32 Value, u8 Input)
  {
  	int Result;
  	u8 Data;
  	u16 Address;
  
  	if (Input == 1)
  		Address = 0x000e;
  	else
  		Address = 0x000b;
  
  	/* PREx[20:16] */
  	Data = (Value >> 16) & 0x1f; 
  	Result = IDT_8T49N24x_SetRegister(I2CBaseAddress, I2CSlaveAddress,
  					  Address, Data);
  
  	/* PREx[15:8] */
  	Data = (Value >> 8); 
  	Result = IDT_8T49N24x_SetRegister(I2CBaseAddress, I2CSlaveAddress,
  					  Address+1, Data);
  
  	/* PREx[7:0] */
  	Data = (Value & 0xff); 
  	Result = IDT_8T49N24x_SetRegister(I2CBaseAddress, I2CSlaveAddress,
  					  Address+2, Data);
  
  	return Result;
  }
  
  /*****************************************************************************/
  /**
  *
  * This function set the M1 feedback
  *
  * @param I2CBaseAddress is the baseaddress of the I2C core.
  * @param I2CSlaveAddress is the 7-bit I2C slave address.
  *
  * @return
  *    - XST_SUCCESS 
  *    - XST_FAILURE 
  *
  * @note None.
  *
  ******************************************************************************/
  static int IDT_8T49N24x_M1Feedback(u32 I2CBaseAddress, u8 I2CSlaveAddress,
  					u32 Value, u8 Input)
  {
  	int Result;
  	u8 Data;
  	u16 Address;
  
  	if (Input == 1)
  		Address = 0x0011;
  	else
  		Address = 0x0014;
  
  	/* M1x[23:16] */
  	Data = (Value >> 16); 
  	Result = IDT_8T49N24x_SetRegister(I2CBaseAddress, I2CSlaveAddress,
  					  Address, Data);
  
  	/* M1x[15:8] */
  	Data = (Value >> 8); 
  	Result = IDT_8T49N24x_SetRegister(I2CBaseAddress, I2CSlaveAddress,
  					  Address+1, Data);
  
  	/* M1x[7:0] */
  	Data = (Value & 0xff); 
  	Result = IDT_8T49N24x_SetRegister(I2CBaseAddress, I2CSlaveAddress,
  					  Address+2, Data);
  
  	return Result;
  }
  
  /*****************************************************************************/
  /**
  *
  * This function set the DSM integer
  *
  * @param I2CBaseAddress is the baseaddress of the I2C core.
  * @param I2CSlaveAddress is the 7-bit I2C slave address.
  *
  * @return
  *    - XST_SUCCESS 
  *    - XST_FAILURE 
  *
  * @note None.
  *
  ******************************************************************************/
  static int IDT_8T49N24x_DSMInteger(u32 I2CBaseAddress, u8 I2CSlaveAddress,
  					u16 Value)
  {
  	int Result;
  	u8 Data;
  
  	/* DSM_INT[8] */
  	Data = (Value >> 8) & 0x01; 
  	Result = IDT_8T49N24x_SetRegister(I2CBaseAddress, I2CSlaveAddress,
  					  0x0025, Data);
  
  	/* DSM_INT[7:0] */
  	Data = (Value & 0xff); 
  	Result = IDT_8T49N24x_SetRegister(I2CBaseAddress, I2CSlaveAddress,
  					  0x0026, Data);
  
  	return Result;
  }
  
  /*****************************************************************************/
  /**
  *
  * This function set the DSM fractional
  *
  * @param I2CBaseAddress is the baseaddress of the I2C core.
  * @param I2CSlaveAddress is the 7-bit I2C slave address.
  *
  * @return
  *    - XST_SUCCESS 
  *    - XST_FAILURE 
  *
  * @note None.
  *
  ******************************************************************************/
  static int IDT_8T49N24x_DSMFractional(u32 I2CBaseAddress, u8 I2CSlaveAddress,
  						u32 Value)
  {
  	int Result;
  	u8 Data;
  
  	/* DSM_FRAC[20:16] */
  	Data = (Value >> 16) & 0x1f; 
  	Result = IDT_8T49N24x_SetRegister(I2CBaseAddress, I2CSlaveAddress,
  					  0x0028, Data);
  
  	/* DSM_FRAC[15:8] */
  	Data = (Value >> 8); 
  	Result = IDT_8T49N24x_SetRegister(I2CBaseAddress, I2CSlaveAddress,
  					  0x0029, Data);
  
  	/* DSM_FRAC[7:0] */
  	Data = (Value & 0xff); 
  	Result = IDT_8T49N24x_SetRegister(I2CBaseAddress, I2CSlaveAddress,
  					  0x002a, Data);
  
  	return Result;
  }
  
  /*****************************************************************************/
  /**
  *
  * This function set the Output divider integer
  *
  * @param I2CBaseAddress is the baseaddress of the I2C core.
  * @param I2CSlaveAddress is the 7-bit I2C slave address.
  *
  * @return
  *    - XST_SUCCESS 
  *    - XST_FAILURE 
  *
  * @note None.
  *
  ******************************************************************************/
  static int IDT_8T49N24x_OutputDividerInteger(u32 I2CBaseAddress,
  			u8 I2CSlaveAddress, u32 Value, u8 Output)
  {
  	int Result;
  	u8 Data;
  	u16 Address;
  
  	switch (Output) {
  		case 0 : Address = 0x003f;
  			break;
  		case 1 : Address = 0x0042;
  			break;
  		case 2 : Address = 0x0045;
  			break;
  		case 3 : Address = 0x0048;
  			break;
  	}
  	
  	/* N_Qm[17:16] */
  	Data = (Value >> 16) & 0x03; 
  	Result = IDT_8T49N24x_SetRegister(I2CBaseAddress, I2CSlaveAddress,
  					  Address, Data);
  
  	/* N_Qm[15:8] */
  	Data = (Value >> 8); 
  	Result = IDT_8T49N24x_SetRegister(I2CBaseAddress, I2CSlaveAddress,
  					  Address+1, Data);
  
  	/* N_Qm[7:0] */
  	Data = (Value & 0xff); 
  	Result = IDT_8T49N24x_SetRegister(I2CBaseAddress, I2CSlaveAddress,
  					  Address+2, Data);
  
  	return Result;
  }
  
  /*****************************************************************************/
  /**
  *
  * This function set the Output divider fractional
  *
  * @param I2CBaseAddress is the baseaddress of the I2C core.
  * @param I2CSlaveAddress is the 7-bit I2C slave address.
  *
  * @return
  *    - XST_SUCCESS 
  *    - XST_FAILURE 
  *
  * @note None.
  *
  ******************************************************************************/
  static int IDT_8T49N24x_OutputDividerFractional(u32 I2CBaseAddress,
  			u8 I2CSlaveAddress, u32 Value, u8 Output)
  {
  	int Result;
  	u8 Data;
  	u16 Address;
  
  	switch (Output) {
  		case 0 : Address = 0x0000;	// ???
  			break;
  		case 1 : Address = 0x0057;
  			break;
  		case 2 : Address = 0x005b;
  			break;
  		case 3 : Address = 0x005f;
  			break;
  	}
  	
  	/* NFRAC_Qm[27:24] */
  	Data = (Value >> 24) & 0x0f; 
  	Result = IDT_8T49N24x_SetRegister(I2CBaseAddress, I2CSlaveAddress,
  					  Address, Data);
  
  	/* NFRAC_Qm[23:16] */
  	Data = (Value >> 16); 
  	Result = IDT_8T49N24x_SetRegister(I2CBaseAddress, I2CSlaveAddress,
  					  Address+1, Data);
  
  	/* NFRAC_Qm[15:8] */
  	Data = (Value >> 8); 
  	Result = IDT_8T49N24x_SetRegister(I2CBaseAddress, I2CSlaveAddress,
  					  Address+2, Data);
  
  	/* NFRAC_Qm[7:0] */
  	Data = (Value & 0xff);
  	Result = IDT_8T49N24x_SetRegister(I2CBaseAddress, I2CSlaveAddress,
  					  Address+3, Data);
  
  	return Result;
  }
  
  /*****************************************************************************/
  /**
  *
  * This function sets the mode (jitter attenuator / synthesizer)
  *
  * @param I2CBaseAddress is the baseaddress of the I2C core.
  * @param I2CSlaveAddress is the 7-bit I2C slave address.
  *
  * @return
  *    - XST_SUCCESS 
  *    - XST_FAILURE 
  *
  * @note None.
  *
  ******************************************************************************/
  static int IDT_8T49N24x_Mode(u32 I2CBaseAddress, u8 I2CSlaveAddress,
  					u8 Synthesizer)
  {
  	int Result;
  	u8 Value;
  	u8 Mask;
  
  	/* Digital PLL */
  	/* State[1:0] */
  	if (Synthesizer) {
  		Value = 0x01;		/* Force FREERUN */
  		Value |= (1<<4);	/* Disable reference input 0 */
  		Value |= (1<<5);	/* Disable reference input 1 */
  	} else {
  		Value = 0x00;		/* Run automatically */
  		Value |= (1<<5);	/* Disable reference input 1 */
  	}
  
  	Mask = 0x33;
  	Result = IDT_8T49N24x_ModifyRegister(I2CBaseAddress, I2CSlaveAddress,
  					     0x000a, Value, Mask);
  
  	/* Analog PLL */
  	/* SYN_MODE */
  	if (Synthesizer) {
  		Value = (1<<3);		/* Synthesizer mode */
  	} else {
  		Value = 0x00;		/* Jitter attenuator mode */
  	}
  
  	Mask = (1<<3);
  	Result = IDT_8T49N24x_ModifyRegister(I2CBaseAddress, I2CSlaveAddress,
  					     0x0069, Value, Mask);
  
  	return Result;
  }
  /*****************************************************************************/
  /**
  *
  * This function sets disables / enables the reference inputs
  *
  * @param I2CBaseAddress is the baseaddress of the I2C core.
  * @param I2CSlaveAddress is the 7-bit I2C slave address.
  *
  * @return
  *    - XST_SUCCESS 
  *    - XST_FAILURE 
  *
  * @note None.
  *
  ******************************************************************************/
  static int IDT_8T49N24x_ReferenceInput(u32 I2CBaseAddress, u8 I2CSlaveAddress,
  					u8 Input, u8 Enable)
  {
  	int Result;
  	u8 Value;
  	u8 Mask;
  	u8 Shift;
  
  	if (Input == 1) {
  		Shift = 5;
  	} else {
  		Shift = 4;
  	}
  
  	if (Enable) {
  		Value = 0x00;		/* Enable */
  	} else {
  		Value = (1<<Shift);	/* Disable reference input  */
  	}
  	Mask = (1<<Shift);
  	Result = IDT_8T49N24x_ModifyRegister(I2CBaseAddress, I2CSlaveAddress,
  					     0x000a, Value, Mask);
  
  	return Result;
  }
  
  /*****************************************************************************/
  /**
  *
  * This function enables/disables the DPLL and APLL calibration
  *
  * @param I2CBaseAddress is the baseaddress of the I2C core.
  * @param I2CSlaveAddress is the 7-bit I2C slave address.
  *
  * @return
  *    - XST_SUCCESS 
  *    - XST_FAILURE 
  *
  * @note None.
  *
  ******************************************************************************/
  static int IDT_8T49N24x_Enable(u32 I2CBaseAddress, u8 I2CSlaveAddress,
  					u8 Enable)
  {
  	int Result;
  	u8 Value;
  	u8 Mask;
  
  	if (Enable) {
  		/* Digital PLL enabled - Calibration
  		 * logic for Analog PLL enabled */
  		Value = 0x00;
  	} else {
  		/* Digital PLL disabled - Calibration
  		 * logic for Analog PLL disabled */
  		Value = 0x05;
  	}
  
  	Mask = 0x05;
  	Result = IDT_8T49N24x_ModifyRegister(I2CBaseAddress, I2CSlaveAddress,
  					     0x0070, Value, Mask);
  
  	return Result;
  }
  
  /*****************************************************************************/
  /**
  *
  * This function set the GPIO outputs
  *
  * @param I2CBaseAddress is the baseaddress of the I2C core.
  * @param I2CSlaveAddress is the 7-bit I2C slave address.
  *
  * @return
  *    - XST_SUCCESS 
  *    - XST_FAILURE 
  *
  * @note None.
  *
  ******************************************************************************/
  //static int IDT_8T49N24x_GPIO(u32 I2CBaseAddress, u8 I2CSlaveAddress)
  //{
  //	int Result;
  //
  //	/* GPIO_DIR
  //	 * GPIO3 is output
  //	 * Rest of the pins are input
  //	 * */
  //	Result = IDT_8T49N24x_SetRegister(I2CBaseAddress, I2CSlaveAddress,
  //					  0x0030, 0x08);
  //
  //	/* GPIxSEL[2] */
  //	Result |= IDT_8T49N24x_SetRegister(I2CBaseAddress, I2CSlaveAddress,
  //					  0x0031, 0x00);
  //
  //	/* GPIxSEL[1] */
  //	Result |= IDT_8T49N24x_SetRegister(I2CBaseAddress, I2CSlaveAddress,
  //					  0x0032, 0x00);
  //
  //	/* GPIxSEL[0] */
  //	Result |= IDT_8T49N24x_SetRegister(I2CBaseAddress, I2CSlaveAddress,
  //					  0x0033, 0x00);
  //
  //	/* GPOxSEL[2] */
  //	Result |= IDT_8T49N24x_SetRegister(I2CBaseAddress, I2CSlaveAddress,
  //					  0x0034, 0x00);
  //
  //	/* GPOxSEL[1] */
  //	Result |= IDT_8T49N24x_SetRegister(I2CBaseAddress, I2CSlaveAddress,
  //					  0x0035, 0x00);
  //
  //	/* GPOxSEL[0] */
  //	Result |= IDT_8T49N24x_SetRegister(I2CBaseAddress, I2CSlaveAddress,
  //					  0x0036, 0x08);
  //
  //	if (Result != XST_SUCCESS)
  //		return XST_FAILURE;
  //	else
  //		return XST_SUCCESS;
  //}
  
  /*****************************************************************************/
  /**
  *
  * This function set the input reference
  *
  * @param I2CBaseAddress is the baseaddress of the I2C core.
  * @param I2CSlaveAddress is the 7-bit I2C slave address.
  *
  * @return
  *    - XST_SUCCESS 
  *    - XST_FAILURE 
  *
  * @note None.
  *
  ******************************************************************************/
  //static int IDT_8T49N24x_SelectInputReference(u32 I2CBaseAddress,
  //					u8 I2CSlaveAddress, u8 Input)
  //{
  //	int Result;
  //	u8 Value;
  //	u8 Mask;
  //	u8 Shift;
  //
  //	Shift = 5;
  //
  //	if (Input == 1) {
  //		/* Clock 1 */
  //		Value = (0x05 << Shift);
  //	} else {
  //		/* Clock 0 */
  //		Value = (0x04 << Shift);
  //	}
  //
  //	Mask = 0x07 << Shift;
  //
  //	Result = IDT_8T49N24x_ModifyRegister(I2CBaseAddress, I2CSlaveAddress,
  //					     0x0008, Value, Mask);
  //
  //	return Result;
  //}
  
  /*****************************************************************************/
  /**
  *
  * This function set the output drivers
  *
  * @param I2CBaseAddress is the baseaddress of the I2C core.
  * @param I2CSlaveAddress is the 7-bit I2C slave address.
  *
  * @return
  *    - XST_SUCCESS 
  *    - XST_FAILURE 
  *
  * @note None.
  *
  ******************************************************************************/
  //static int IDT_8T49N24x_OutputDriver(u32 I2CBaseAddress, u8 I2CSlaveAddress,
  //					u8 Output, u8 Enable)
  //{
  //	int Result;
  //	u8 Value;
  //	u8 Mask;
  //	u16 Address;
  //	u8 Shift;
  //
  //	/* OUTEN */
  //	Mask = (1 << Output);
  //	if (Enable)
  //		Value = Mask;
  //	else
  //		Value = 0x00;
  //
  //	Result = IDT_8T49N24x_ModifyRegister(I2CBaseAddress, I2CSlaveAddress,
  //					     0x0039, Value, Mask);
  //
  //	/* OUTMODE */
  //	switch (Output) {
  //		case 0 :
  //			Address = 0x003e;
  //			Shift = 1;
  //			break;
  //
  //		case 1 :
  //			Address = 0x003e;
  //			Shift = 5;
  //			break;
  //
  //		case 2 :
  //			Address = 0x003d;
  //			Shift = 1;
  //			break;
  //
  //		case 3 :
  //			Address = 0x003d;
  //			Shift = 5;
  //			break;
  //	}
  //
  //	if (Enable)
  //		Value = 0x02;	/* LVDS */
  //	else
  //		Value = 0x00;	/* High-impedance */
  //
  //	Value <<= Shift;
  //	Mask = (0x07 << Shift);
  //
  //	Result |= IDT_8T49N24x_ModifyRegister(I2CBaseAddress, I2CSlaveAddress,
  //					      Address, Value, Mask);
  //
  //	/* Qm_DIS */
  //	if (!Enable)
  //		Value = (1 << Output);
  //	else
  //		Value = 0;
  //
  //	Mask = (1 << Output);
  //
  //	Result |= IDT_8T49N24x_ModifyRegister(I2CBaseAddress, I2CSlaveAddress,
  //					      0x006f, Value, Mask);
  //
  //	if (Result != XST_SUCCESS)
  //		return XST_FAILURE;
  //	else
  //		return XST_SUCCESS;
  //}
  
  /*****************************************************************************/
  /**
  *
  * This function sets the lock mode
  *
  * @param I2CBaseAddress is the baseaddress of the I2C core.
  * @param I2CSlaveAddress is the 7-bit I2C slave address.
  *
  * @return
  *    - XST_SUCCESS 
  *    - XST_FAILURE 
  *
  * @note None.
  *
  ******************************************************************************/
  //static int IDT_8T49N24x_LockMode(u32 I2CBaseAddress, u8 I2CSlaveAddress)
  //{
  //	int Result;
  //	u8 Value;
  //	u8 Mask;
  //
  //	Value = 0x02;
  //	Mask = 0x02;
  //	Result = IDT_8T49N24x_ModifyRegister(I2CBaseAddress, I2CSlaveAddress,
  //					     0x006c, Value, Mask);
  //
  //	return Result;
  //}
  
  int IDT_8T49N24x_SetGPOut(u32 I2CBaseAddress, u8 I2CSlaveAddress,
  				u8 PortID, u8 Set)
  {
  	if (PortID > 3) {
  		print("Invalid port ID\n\r");
  		return XST_FAILURE;
  	}
  	
  	u32 ByteCount = 0;
  	u8 Data = 0;
  	u8 Buffer[3];
  	
  	Buffer[0] = 0x00; /* MSB RegAddr */
  	Buffer[1] = 0x38; /* LSB RegAddr */
  	ByteCount = XIic_Send(I2CBaseAddress, I2CSlaveAddress, (u8*)Buffer,
  			      2, XIIC_REPEATED_START);
  	if (ByteCount != 2) {
  		return XST_FAILURE;
  	}
  
  	ByteCount = XIic_Recv(I2CBaseAddress, I2CSlaveAddress, (u8*)Buffer,
  			      1, XIIC_STOP);
  	if (ByteCount != 1) {
  		return XST_FAILURE;
  	}
  	Data = Buffer[0];
  	
  	if (Set == TRUE) {
  		Data |= (1<<PortID);
  	} else {
  		Data &= ~(1<<PortID);
  	}
  	
  	Buffer[0] = 0x00; /* MSB RegAddr */
  	Buffer[1] = 0x38; /* LSB RegAddr */
  	Buffer[2] = Data;
  	ByteCount = XIic_Send(I2CBaseAddress, I2CSlaveAddress, (u8*)Buffer,
  			      3, XIIC_STOP);
  	if (ByteCount != 3) {
  		return XST_FAILURE;
  	}
  	
  	return XST_SUCCESS;
  }
  
  /*****************************************************************************/
  /**
  *
  * This function initializes the IDT 8TN49N24x with default values
  * for use with the Video FMC.
  *
  * @param I2CBaseAddress is the baseaddress of the I2C core.
  * @param I2CSlaveAddress is the 7-bit I2C slave address.
  *
  * @return
  *    - XST_SUCCESS Initialization was successful.
  *    - XST_FAILURE I2C write error.
  *
  * @note None.
  *
  ******************************************************************************/
  int IDT_8T49N24x_Init(u32 I2CBaseAddress, u8 I2CSlaveAddress)
  {
  	int Result;
  
  	/* Check device ID */
  	Result = IDT_8T49N24x_CheckDeviceID(I2CBaseAddress, I2CSlaveAddress);
  
  	if (Result == XST_SUCCESS) {
  
  		/* Disable DPLL and APLL calibration
  		 * The i2c interface is clocked by the APLL.
  		 * During the PLL parameters update, the i2c might 
  		 * become unresponsive.
  		 * To prevent this, the DPLL and APLL calibration are 
  		 * disabled during the i2c transactions
  		 * */
  		Result = IDT_8T49N24x_Enable(I2CBaseAddress, I2CSlaveAddress,
  					     FALSE);
  
  		/* Configure device */
  		Result = IDT_8T49N24x_Configure_JA(I2CBaseAddress,
  						   I2CSlaveAddress);
  
  		/* Enable DPLL and APLL calibration */
  		Result = IDT_8T49N24x_Enable(I2CBaseAddress, I2CSlaveAddress,
  					     TRUE);
  
  		return Result;
  	}
  
  	return XST_FAILURE;
  }
  
  /*****************************************************************************/
  /**
  *
  * This function the IDT 8TN49N24x device with the data from the configuration table.
  *
  * @param I2CBaseAddress is the baseaddress of the I2C core.
  * @param I2CSlaveAddress is the 7-bit I2C slave address.
  *
  * @return None
  *
  * @note None.
  *
  ******************************************************************************/
  //static int IDT_8T49N24x_Configure(u32 I2CBaseAddress, u8 I2CSlaveAddress)
  //{
  //	int Result;
  //	u32 Index;
  //	xil_printf("freerun\n\r");
  //
  //	/* The configuration is started from address 0x08 */
  //	for (Index = 8 ; Index < sizeof(IDT_8T49N24x_Config_Syn) ; Index++) {
  //		/* Skip address 0x70
  //		 * Address 0x70 enables the DPLL and APLL calibration */
  //		if (Index != 0x070) {
  //			Result = IDT_8T49N24x_SetRegister(I2CBaseAddress,
  //						I2CSlaveAddress, Index,
  //						IDT_8T49N24x_Config_Syn[Index]);
  //		}
  //	}
  //	return Result;
  //}
  
  static int IDT_8T49N24x_Configure_JA(u32 I2CBaseAddress, u8 I2CSlaveAddress)
  {
  	int Result;
  	u32 Index;
  
  	/* The configuration is started from address 0x08a */
  	for (Index = 8 ; Index < sizeof(IDT_8T49N24x_Config_JA) ; Index++) {
  		/* Skip address 0x70
  		 * Address 0x70 enables the DPLL and APLL calibration */
  		if (Index != 0x070) {
  			Result = IDT_8T49N24x_SetRegister(I2CBaseAddress,
  						I2CSlaveAddress, Index,
  						IDT_8T49N24x_Config_JA[Index]);
  		}
  	}
  	return Result;
  }
  
  /*****************************************************************************/
  /**
  *
  * This function displays a registerdump of the IDT 8TN49N24x device.
  *
  * @param I2CBaseAddress is the baseaddress of the I2C core.
  * @param I2CSlaveAddress is the 7-bit I2C slave address.
  *
  * @return None
  *
  * @note None.
  *
  ******************************************************************************/
  void IDT_8T49N24x_RegisterDump(u32 I2CBaseAddress, u8 I2CSlaveAddress)
  {
  	u8 Data;
  	u32 i;
  	int Result;
  
  	xil_printf("Register dump\n\r");
  
  	Result = IDT_8T49N24x_CheckDeviceID(I2CBaseAddress, I2CSlaveAddress);
  
  	if (Result == XST_SUCCESS) {
  		print("\n\r");
  		print("---------------------\n\r");
  		print("- IDT8T49N241 I2C dump:\n\r");
  		print("---------------------\n\r");
  
  		xil_printf("     ");
  		for (i = 0 ; i < 16 ; i++)
  			xil_printf("+%01x ", i);
  
  		xil_printf("\n\r     ");
  		for (i = 0 ; i < 16 ; i++)
  			xil_printf("---");
  		
  		for (i = 0 ; i < 256 ; i++) {
  			if ((i % 16) == 0) {
  				xil_printf("\n\r%02x : ", i);
  			}
  			Data = IDT_8T49N24x_GetRegister(I2CBaseAddress,
  							I2CSlaveAddress, i);
  			xil_printf("%02x ", Data);
  		}
  		
  		xil_printf("\n\r");
  	} else {
  		xil_printf("IDT 8T49N241 not found!\n\r");
  	}
  }
  
  /** @} */
  