/*****************************************************************************/
/**
 * Description: Time sync implementation file.
 * 
 * Author: Author's name
 * Date: 2021-12-04 16:32
 * LastEditors: FanHao
 * LastEditTime: 2022-07-10 20:43
 * Revisions: Rev 0.0
 * History: 
 * [2022-07-10]: New branch for Dijian.
 * [2021-12-04]: Initial version.
 * 
 * Copyright(c) 2021 Beijing Institute of Technology.
 * Lab of Communication and Networking
 * 
 ******************************************************************************/

/***************************** Include Files *********************************/
#include <string.h>
#include <stdlib.h>
#include "linklayer814.h"
#include "rtt.h"
#include "../time_ctrl/time_ctrl.h"
#include "../error.h"
#include "../common.h"

/************************** Constant Definitions *****************************/
/***************** Macros (Inline Functions) Definitions *********************/
/**************************** Type Definitions *******************************/
/************************** Variable Definitions *****************************/
/************************** Function Prototypes ******************************/

static void RTT_StageUpdate(L2_RTT_FSM* rttFsmPtr, L2_RTT_SATGE newSatge);
static void RTT_ResetRecord(RTT_RECORD* recordPtr);
static int32_t RTT_GetCounter10nsDeviation(PHY_INST *phyRef);


/*****************************************************************************/
/**
 * @brief    a slot alignment, base on physical layer information.
 *
 * @param   instPtr	a pointer to linklayer layer instance
 * @param   frameNum	
 * @param   slotNum	
 *
 * @return  SUCCESS Initialize successfully.
 *          FAILURE Initialization failed, allocate memory fail or initial
 *          bram controller fail.
 *
 ******************************************************************************/
// TODO: Check
int32_t L2_TimeAlign(L2_INST* instPtr, uint32_t frameNum, uint32_t slotNum){
	L1_FRAME_TYPE lastRecvdFrame;
	lastRecvdFrame = Phy_GetLastRecvFrameType(instPtr->config.phyInstPtr);
	if(lastRecvdFrame != L1_NONE_FRAME){
		return EIGNORE;
	}

	// read nextSendTime from physical layer
	uint64_t currTime, expctTime;
	int64_t timeDiff;
	TIME_WORD timeStamp, slotTimerAdjmet;
	expctTime = ((uint64_t)(frameNum*L2_SLOTS_PER_FRAME + slotNum))*COUNTE_FRAC_MAX;
	expctTime += Phy_GetTimeComp(lastRecvdFrame);

	Phy_GetFrameSyncTimeStamp(instPtr->config.phyInstPtr, &timeStamp);
	currTime = (uint64_t)timeStamp.frac_part;
	currTime += ((uint64_t)timeStamp.int_part) * COUNTE_FRAC_MAX;

	timeDiff = (int64_t)(expctTime - currTime);

	slotTimerAdjmet.int_part = (uint32_t)(timeDiff/COUNTE_FRAC_MAX);
	slotTimerAdjmet.frac_part = (uint32_t)(timeDiff%COUNTE_FRAC_MAX);
	TimeCtrl_TimeAdjust(instPtr->config.tmcInstPtr, &slotTimerAdjmet, TM_ADJ_ADD);
	return SUCCESS;
}

/**
 * @brief   Get last RTT stage of a specified RTT descriptor.
 */
inline L2_RTT_SATGE RTT_GetLastStage(L2_RTT_FSM* rttFsmPtr){
	ASSERT(rttFsmPtr != NULL);
	return rttFsmPtr->rttStatge.last;
}
/**
 * @brief   Get current RTT stage of a specified RTT descriptor.
 */
inline L2_RTT_SATGE RTT_GetCurrentStage(L2_RTT_FSM* rttFsmPtr){
	ASSERT(rttFsmPtr != NULL);
	return rttFsmPtr->rttStatge.curr;
}
/**
 * @brief   Get next RTT stage of a specified RTT descriptor.
 */
inline L2_RTT_SATGE RTT_GetNextStage(L2_RTT_FSM* rttFsmPtr){
	ASSERT(rttFsmPtr != NULL);
	return rttFsmPtr->rttStatge.next;
}
/**
 * @brief   Get next RTT stage of a specified RTT descriptor.
 */
static inline void RTT_ResetRecord(RTT_RECORD* recordPtr){
	ASSERT(recordPtr != NULL);
	memset(recordPtr, 0x00, sizeof(RTT_RECORD));
	return;
}

/*****************************************************************************/
/**
 * @brief   Update corrent time-sync for RTT stage
 *
 * @param   scanFsmPtr  A pointer to scan net fsm.
 *          newSatge    New state.
 *
 * @return  NONE.
 *
 ******************************************************************************/
static void RTT_StageUpdate(L2_RTT_FSM* rttFsmPtr, L2_RTT_SATGE newSatge) {
	ASSERT(rttFsmPtr != NULL);
	ASSERT(newSatge >= RTT_NONE_STAGE && newSatge <= RTT_RSP2);
	DBG_INFO("RTT current Stage: %u -> RTT new Stage: %u, Stage: arranged.%d.\n",
			rttFsmPtr->rttStatge.curr, rttFsmPtr->rttStatge.next, newSatge);
	L2_RcdShift(&(rttFsmPtr->rttStatge), newSatge);
	return;
}

/*****************************************************************************/
/**
 * @brief   Reset RTT systerm .
 *
 * @param   rttFsmPtr
 *
 * @return  SUCCESS Initialization successful.
 *          EMAC_MEMORY_ALLOC_ERROR Memory allocate error.
 *
 ******************************************************************************/
void RTT_Reset(L2_RTT_FSM* rttFsmPtr){
	ASSERT(rttFsmPtr != NULL);
	RTT_ResetRecord(&(rttFsmPtr->rttRecord));
	rttFsmPtr->rttStatge.last = RTT_NONE_STAGE;
	rttFsmPtr->rttStatge.curr = RTT_NONE_STAGE;
	rttFsmPtr->rttStatge.next = RTT_NONE_STAGE;
	rttFsmPtr->isR1Valid = false;
	rttFsmPtr->isR2Valid = false;
	rttFsmPtr->isR3Valid = false;
	rttFsmPtr->isR4Valid = false;
}

void RTT_Destroy(L2_RTT_FSM* rttFsmPtr){
	free(rttFsmPtr);
}


static int32_t RTT_GetCounter10nsDeviation(PHY_INST *phyRef) {
	TIME_WORD timeStamp;
	int64_t lastFrameSyncT, lastSlotStartT;
	Phy_GetFrameSyncTimeStamp(phyRef, &timeStamp);
	lastFrameSyncT = (uint64_t) timeStamp.frac_part;
	lastFrameSyncT += ((uint64_t)timeStamp.int_part) * COUNTE_FRAC_MAX;
	Phy_GetLastSlotStartTimeStamp(phyRef, &timeStamp);
	lastSlotStartT = (uint64_t) timeStamp.frac_part;
	lastSlotStartT += ((uint64_t)timeStamp.int_part) * COUNTE_FRAC_MAX;
	return (PHY_SYNCT2FEND_200K - (lastSlotStartT - lastFrameSyncT));
}

/*****************************************************************************/
/**
 * @brief   Initialize RTT FSM, allocate memory for FSM instance.
 *
 * @param   rttFsmPtr
 *
 * @return  SUCCESS Initialization successful.
 *          EMAC_MEMORY_ALLOC_ERROR Memory allocate error.
 *
 ******************************************************************************/
int32_t RTT_Init(L2_RTT_FSM** rttFsmPtr){
	(*rttFsmPtr) = (L2_RTT_FSM*) malloc(sizeof(L2_RTT_FSM));
	if (*rttFsmPtr == NULL) {
		free(*rttFsmPtr);
		return EALLOC;
	}
	RTT_Reset(*rttFsmPtr);
	return SUCCESS;
}

/*****************************************************************************/
/**
 * @brief   Execute a Time-Sync Process.
 *
 * @param   instPtr	a pointer to linklayer layer instance
 *
 * @return  SUCCESS Time-Sync Process Done.
 *          FAILURE Time-Sync Process end with error.
 *
 ******************************************************************************/
int32_t RTT_Proc(L2_INST* instPtr) {
	ASSERT(instPtr != NULL);
	L2_RTT_FSM* rttFsmPtr = L2_GetRttDesc(instPtr);
	RTT_RECORD* rttRecord = &(rttFsmPtr->rttRecord);
	PHY_INST *phyRef = instPtr->config.phyInstPtr;
	int32_t Status = SUCCESS;
	L2_RTT_TOR lastTor, nextTor;
	if(instPtr->rtneConfig.last != NULL && instPtr->rtneConfig.last->slotType == SLOT_INTRA_TSYNC){
		// Get last tor state
		if(instPtr->rtneConfig.last->src0 == instPtr->myInfo.nodeId){
			lastTor = RTT_SEND;
		}
		else if(instPtr->rtneConfig.last->dst0 == instPtr->myInfo.nodeId){
			lastTor = RTT_RCV;
		}
		else{
			lastTor = RTT_NONE;
		}
	}
	else{
		lastTor = RTT_NONE;
	}

	if(instPtr->rtneConfig.next != NULL && instPtr->rtneConfig.next->slotType == SLOT_INTRA_TSYNC){
		// Get next tor state
		if(instPtr->rtneConfig.next->src0 == instPtr->myInfo.nodeId){
			nextTor = RTT_SEND;
		}
		else if(instPtr->rtneConfig.next->dst0 == instPtr->myInfo.nodeId){
			nextTor = RTT_RCV;
		}
		else{
			nextTor = RTT_NONE;
		}
	}
	else{
		nextTor = RTT_NONE;
	}

	DBG_INFO("-------- RTT Procedure --------\n");
	// Stage trans
	// For Head Node: Tx->Rx->Tx->Rx
	if(instPtr->myInfo.nodeType == HEAD_NODE){
		switch(rttFsmPtr->rttStatge.next) {
		case RTT_NONE_STAGE :
			DBG_INFO("RTT procedure start...\n");
			// TODO
//			RTT_ResetRecord(rttRecord);
			RTT_StageUpdate(rttFsmPtr, RTT_REQ1);
			break;
		case RTT_REQ1 :
			if(nextTor == RTT_SEND){
				DBG_INFO("Prepare data for RTT REQ-1\n");
				rttRecord->Tt1.timeH  = L2_GetNextFrameNum(instPtr)*L2_SLOTS_PER_FRAME + L2_GetNextSlotNum(instPtr);
				rttRecord->Tt1.timeL = 0 ;
				DBG_INFO("Tt1-timeL:%u.\n", rttRecord->Tt1.timeL);
				DBG_INFO("Tt1-timeH:%u.\n", rttRecord->Tt1.timeH);
				RTT_StageUpdate(rttFsmPtr, RTT_RSP1);
			}
			else{
				DBG_INFO("Skip RTT slot, [Stage: %u].\n", rttFsmPtr->rttStatge.next);
			}
			break;
		case RTT_RSP1 :
			if(lastTor == RTT_RCV){
				if(L2_isDataAvail(instPtr) == true){
					DBG_INFO("RTT RSP-1 have been received.\n");
					DBG_INFO("Preparing data for RTT REQ-2.\n");
					rttFsmPtr->isR2Valid = true;
					// Calculate doppler
					double doppler = Phy_GetCoarseFreqEst(phyRef);
					rttRecord->dopplerR2 = (int32_t)doppler;
					DBG_INFO("rttRecord->dopplerR2: %u.\n", rttRecord->dopplerR2);

					// Calculate last frame receive time.
					int32_t counter10ns = RTT_GetCounter10nsDeviation(phyRef);
					// response for rtt Adj
					counter10ns += 10000;
					counter10ns -= rttRecord->rttAdj;
					if ( counter10ns < 0) {
						counter10ns += COUNTE_FRAC_MAX;
						rttRecord->Tr2.timeH -- ;
						_nop_();
					}
					rttRecord->Tr2.timeH = L2_GetLastFrameNum(instPtr)*L2_SLOTS_PER_FRAME + L2_GetLastSlotNum(instPtr);
					rttRecord->Tr2.timeL = (uint32_t)counter10ns;
					DBG_INFO("Tr2-timeL:%u.\n", rttRecord->Tr2.timeL);
					DBG_INFO("Tr2-timeH:%u.\n", rttRecord->Tr2.timeH);

					// Calculate TroundA
					rttRecord->TroundA.timeL = rttRecord->Tr2.timeL;
					rttRecord->TroundA.timeH = rttRecord->Tr2.timeH - rttRecord->Tt1.timeH;
					DBG_INFO("TroundA-timeL:%u.\n", rttRecord->TroundA.timeL);
					DBG_INFO("TroundA-timeH:%u.\n", rttRecord->TroundA.timeH);
				}
				else{
					rttFsmPtr->isR2Valid = false;
					rttRecord->dopplerR2 = RTT_DOPPLER_NONE;
					rttRecord->TroundA.timeL = RTT_TIME_NONE;
					rttRecord->TroundA.timeH = RTT_TIME_NONE;
					DBG_WARNING("RTT RSP-1 have not been received [Stage: %u].\n", rttFsmPtr->rttStatge.next);
					DBG_WARNING("Set dopplerR2 and TroundA to dummy value.\n");
					DBG_INFO("dopplerR2:%08X.\n", rttRecord->dopplerR2);
					DBG_INFO("TroundA-timeL:%08X.\n", rttRecord->TroundA.timeL);
					DBG_INFO("TroundA-timeH:%08X.\n", rttRecord->TroundA.timeH);
				}
				RTT_StageUpdate(rttFsmPtr, RTT_REQ2);
			}
			else{
				DBG_INFO("Skip RTT slot, [Stage: %u].\n", rttFsmPtr->rttStatge.next);
			}
			break;
		case RTT_REQ2 :
			if(nextTor == RTT_SEND){
				DBG_INFO("Prepare data for RTT REQ-2\n");
				rttRecord->Tt3.timeH  = L2_GetNextFrameNum(instPtr)*L2_SLOTS_PER_FRAME + L2_GetNextSlotNum(instPtr);
				rttRecord->Tt3.timeL = 0 ;
				DBG_INFO("Tt3-timeL:%u.\n", rttRecord->Tt3.timeL);
				DBG_INFO("Tt3-timeH:%u.\n", rttRecord->Tt3.timeH);

				if ( rttFsmPtr->isR2Valid ) {
					// Calculate reply A
					rttRecord->TreplyA.timeL = COUNTE_FRAC_MAX - rttRecord->Tr2.timeL;
					rttRecord->TreplyA.timeH = rttRecord->Tt3.timeH - rttRecord->Tr2.timeH - 1;
					DBG_INFO("TreplyA-timeL:%u.\n", rttRecord->TreplyA.timeL);
					DBG_INFO("TreplyA-timeH:%u.\n", rttRecord->TreplyA.timeH);
				}
				else {
					rttRecord->TreplyA.timeL = RTT_TIME_NONE;
					rttRecord->TreplyA.timeH = RTT_TIME_NONE;
					DBG_WARNING("RTT RSP-1 have not been received [Stage: %u].\n", rttFsmPtr->rttStatge.next);
					DBG_WARNING("Set TreplyA to dummy value.\n");
					DBG_INFO("TreplyA-timeL:%08X.\n", rttRecord->TreplyA.timeL);
					DBG_INFO("TreplyA-timeH:%08X.\n", rttRecord->TreplyA.timeH);
				}
				RTT_StageUpdate(rttFsmPtr, RTT_RSP2);
			}
			else{
				DBG_INFO("Skip RTT slot, [Stage: %u].\n", rttFsmPtr->rttStatge.next);
			}
			break;
		case RTT_RSP2 :
			if(lastTor == RTT_RCV){
				if(L2_isDataAvail(instPtr) == true){
					DBG_INFO("RTT RSP-2 have been received.\n");
					rttFsmPtr->isR4Valid = true;
					// Calculate doppler
					double doppler = Phy_GetCoarseFreqEst(phyRef);
					rttRecord->dopplerR2 = (int32_t)doppler;
					DBG_INFO("rttRecord->dopplerR2: %d.\n", rttRecord->dopplerR2);

					// Calculate last frame receive time.
					int32_t counter10ns = RTT_GetCounter10nsDeviation(phyRef);
					if ( counter10ns < 0) {
						counter10ns += COUNTE_FRAC_MAX;
						rttRecord->Tr4.timeH -- ;
					}
					rttRecord->Tr2.timeH = L2_GetLastFrameNum(instPtr)*L2_SLOTS_PER_FRAME + L2_GetLastSlotNum(instPtr);
					// Get a cnt with clk of 192MHz
					rttRecord->Tr4.timeL = (uint32_t)counter10ns;
					DBG_INFO("Tr4-timeL:%u.\n", rttRecord->Tr4.timeL);
					DBG_INFO("Tr4-timeH:%u.\n", rttRecord->Tr4.timeH);
				}
				else{
					rttFsmPtr->isR4Valid = false;
					rttRecord->Tr4.timeL = RTT_TIME_NONE;
					rttRecord->Tr4.timeH = RTT_TIME_NONE;
					DBG_WARNING("RTT RSP-2 have not been received [Stage: %u].\n", rttFsmPtr->rttStatge.next);
					DBG_WARNING("Set Tr4 to dummy value.\n");
					DBG_INFO("Tr4-timeL:%08X.\n", rttRecord->Tr4.timeL);
					DBG_INFO("Tr4-timeH:%08X.\n", rttRecord->Tr4.timeH);
				}
				RTT_StageUpdate(rttFsmPtr, RTT_NONE_STAGE);
				DBG_INFO("RTT procedure end...\n");
			}
			break;
		default :
			break;
		}
	}
	// For Member Node: Rx->Tx->Rx->Tx
	else{
		switch (rttFsmPtr->rttStatge.next) {
		case RTT_NONE_STAGE :
			DBG_INFO("RTT procedure start...\n");
			// TODO
//			RTT_ResetRecord(rttRecord);
			RTT_StageUpdate(rttFsmPtr, RTT_REQ1);
			break;
		case RTT_REQ1 :
			if(lastTor == RTT_RCV){
				if(L2_isDataAvail(instPtr) == true){
					DBG_INFO("RTT REQ-1 have been received.\n");
					DBG_INFO("Preparing data for RTT RSP-1.\n");
					rttFsmPtr->isR2Valid = true;
					// Calculate doppler
					double doppler = Phy_GetCoarseFreqEst(phyRef);
					rttRecord->dopplerR2 = (int32_t)doppler;
					DBG_INFO("rttRecord->dopplerR2: %d.\n", rttRecord->dopplerR2);

					// Calculate last frame receive time.
					int32_t counter10ns = RTT_GetCounter10nsDeviation(phyRef);
					if ( counter10ns < 0) {
						counter10ns += COUNTE_FRAC_MAX;
						rttRecord->Tr1.timeH -- ;
					}
					rttRecord->Tr1.timeH = L2_GetLastFrameNum(instPtr)*L2_SLOTS_PER_FRAME + L2_GetLastSlotNum(instPtr);
					rttRecord->Tr1.timeL = (uint32_t)counter10ns;
					DBG_INFO("Tr1-timeL:%u.\n", rttRecord->Tr1.timeL);
					DBG_INFO("Tr1-timeH:%u.\n", rttRecord->Tr1.timeH);
				}
				else{
					rttFsmPtr->isR1Valid = false;
					rttRecord->dopplerR1 = RTT_DOPPLER_NONE;
					rttRecord->Tr1.timeL = RTT_TIME_NONE;
					rttRecord->Tr1.timeH = RTT_TIME_NONE;
					DBG_WARNING("RTT REQ-1 have not been received [Stage: %u].\n", rttFsmPtr->rttStatge.next);
					DBG_WARNING("Set dopplerR1 and Tr1 to dummy value.\n");
					DBG_INFO("dopplerR1:%08X.\n", rttRecord->dopplerR1);
					DBG_INFO("Tr1-timeL:%08X.\n", rttRecord->Tr1.timeL);
					DBG_INFO("Tr1-timeH:%08X.\n", rttRecord->Tr1.timeH);
				}
				RTT_StageUpdate(rttFsmPtr, RTT_RSP1);
			}
			break;
		case RTT_RSP1 :
			if(nextTor == RTT_SEND){
				DBG_INFO("Prepare data for RTT RSP-1\n");
				rttRecord->Tt2.timeH  = L2_GetNextFrameNum(instPtr)*L2_SLOTS_PER_FRAME + L2_GetNextSlotNum(instPtr);
				rttRecord->Tt2.timeL = 0 ;
				DBG_INFO("Tt2-timeL:%u.\n", rttRecord->Tt2.timeL);
				DBG_INFO("Tt2-timeH:%u.\n", rttRecord->Tt2.timeH);

				if ( rttFsmPtr->isR1Valid ) {
					// Calculate reply B
					rttRecord->TreplyB.timeL = COUNTE_FRAC_MAX - rttRecord->Tr1.timeL;
					rttRecord->TreplyB.timeH = rttRecord->Tt2.timeH - rttRecord->Tr1.timeH - 1;
					DBG_INFO("TreplyB-timeL:%u.\n", rttRecord->TreplyB.timeL);
					DBG_INFO("TreplyB-timeH:%u.\n", rttRecord->TreplyB.timeH);
				}
				else {
					rttRecord->TreplyB.timeL = RTT_TIME_NONE;
					rttRecord->TreplyB.timeH = RTT_TIME_NONE;
					DBG_WARNING("RTT REQ-1 have not been received [Stage: %u].\n", rttFsmPtr->rttStatge.next);
					DBG_WARNING("Set ReplayB to dummy value.\n");
					DBG_INFO("TreplyB-timeL:%08X.\n", rttRecord->TreplyB.timeL);
					DBG_INFO("TreplyB-timeH:%08X.\n", rttRecord->TreplyB.timeH);
				}
				RTT_StageUpdate(rttFsmPtr, RTT_REQ2);
			}
			break;
		case RTT_REQ2 :
			if(lastTor == RTT_RCV){
				if(L2_isDataAvail(instPtr) == true){
					DBG_INFO("RTT REQ-2 have been received.\n");
					DBG_INFO("Preparing data for RTT RSP-2.\n");
					rttFsmPtr->isR3Valid = true;

					// Calculate doppler
					double doppler = Phy_GetCoarseFreqEst(phyRef);
					rttRecord->dopplerR2 = (int32_t)doppler;
					DBG_INFO("rttRecord->dopplerR2: %d.\n", rttRecord->dopplerR2);

					// Calculate last frame receive time.
					int32_t counter10ns = RTT_GetCounter10nsDeviation(phyRef);
					if ( counter10ns < 0) {
						counter10ns += COUNTE_FRAC_MAX;
						rttRecord->Tr3.timeH -- ;
					}
					rttRecord->Tr3.timeL = (uint32_t)counter10ns;
					DBG_INFO("Tr3-timeL:%u.\n", rttRecord->Tr3.timeL);
					DBG_INFO("Tr3-timeH:%u.\n", rttRecord->Tr3.timeH);

					// Calculate TroundB
					rttRecord->TroundB.timeL = rttRecord->Tr3.timeL;
					rttRecord->TroundB.timeH = rttRecord->Tr3.timeH - rttRecord->Tt2.timeH;
					DBG_INFO("TroundB-timeL:%u.\n", rttRecord->TroundB.timeL);
					DBG_INFO("TroundB-timeH:%u.\n", rttRecord->TroundB.timeH);
				}
				else{
					rttFsmPtr->isR3Valid = false;
					rttRecord->dopplerR3 = RTT_DOPPLER_NONE;
					rttRecord->TroundB.timeL = RTT_TIME_NONE;
					rttRecord->TroundB.timeH = RTT_TIME_NONE;
					DBG_WARNING("RTT REQ-2 have not been received [Stage: %u].\n", rttFsmPtr->rttStatge.next);
					DBG_WARNING("Set dopplerR3 and ReplayB to dummy value.\n");
					DBG_INFO("dopplerR3:%08X.\n", rttRecord->dopplerR3);
					DBG_INFO("TroundB-timeL:%08X.\n", rttRecord->TroundB.timeL);
					DBG_INFO("TroundB-timeH:%08X.\n", rttRecord->TroundB.timeH);
				}
				RTT_StageUpdate(rttFsmPtr, RTT_RSP2);
			}
			break;
		case RTT_RSP2 :
			if(nextTor == RTT_SEND){
				DBG_INFO("Prepare data for RTT RSP-2\n");
				rttRecord->Tt4.timeH  = L2_GetNextFrameNum(instPtr)*L2_SLOTS_PER_FRAME + L2_GetNextSlotNum(instPtr);
				rttRecord->Tt4.timeL = 0;
				DBG_INFO("Tt4-timeL:%u.\n", rttRecord->Tt4.timeL);
				DBG_INFO("Tt4-timeH:%u.\n", rttRecord->Tt4.timeH);

				if ( rttFsmPtr->isR3Valid ) {
					// Calculate reply B
					rttRecord->TreplyB.timeL = COUNTE_FRAC_MAX - rttRecord->Tr3.timeL;
					rttRecord->TreplyB.timeH = rttRecord->Tt4.timeH - rttRecord->Tr3.timeH - 1;
					DBG_INFO("TreplyB-timeL:%u.\n", rttRecord->TreplyB.timeL);
					DBG_INFO("TreplyB-timeH:%u.\n", rttRecord->TreplyB.timeH);
					// TODO implement a time adjustment.
					DBG_INFO("RTT procedure end...\n");
				}
				else {
					rttRecord->TreplyB.timeL = RTT_TIME_NONE;
					rttRecord->TreplyB.timeH = RTT_TIME_NONE;
					DBG_WARNING("RTT REQ-2 have not been received [Stage: %u].\n", rttFsmPtr->rttStatge.next);
					DBG_WARNING("Set ReplayB to dummy value.\n");
					DBG_INFO("TreplyB-timeL:%08X.\n", rttRecord->TreplyB.timeL);
					DBG_INFO("TreplyB-timeH:%08X.\n", rttRecord->TreplyB.timeH);
				}
				RTT_StageUpdate(rttFsmPtr, RTT_NONE_STAGE);
			}
			break;
		default :
			break;
		}
	}
	return Status;
}