forked from gatsby/datalink_repo
473 lines
17 KiB
C
473 lines
17 KiB
C
/*****************************************************************************/
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/**
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* Description: Time sync implementation file.
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*
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* Author: Author's name
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* Date: 2021-12-04 16:32
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* LastEditors: FanHao
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* LastEditTime: 2022-07-10 20:43
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* Revisions: Rev 0.0
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* History:
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* [2022-07-10]: New branch for Dijian.
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* [2021-12-04]: Initial version.
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*
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* Copyright(c) 2021 Beijing Institute of Technology.
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* Lab of Communication and Networking
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*
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******************************************************************************/
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/***************************** Include Files *********************************/
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#include <string.h>
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#include <stdlib.h>
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#include "linklayer814.h"
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#include "rtt.h"
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#include "../time_ctrl/time_ctrl.h"
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#include "../error.h"
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#include "../common.h"
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/************************** Constant Definitions *****************************/
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#define LIGHT_SPPED_AIR 299702547.0 // m/s
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#define LIGHT_SPPED_VAC 299792458.0 // m/s
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#define RTT_DOPPLER_NONE UINT32_MAX
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const TIME_WORD RTT_TIME_NONE = {
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.int_part = UINT32_MAX,
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.frac_part = UINT32_MAX
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};
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/***************** Macros (Inline Functions) Definitions *********************/
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/**************************** Type Definitions *******************************/
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/************************** Variable Definitions *****************************/
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/************************** Function Prototypes ******************************/
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static void RTT_StageUpdate(L2_RTT_FSM* rttFsmPtr, L2_RTT_STGE newStage);
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static void RTT_GetFrameStart(L2_INST* instPtr, TIME_WORD *tmStamp, L2_TOR_TYPE torType);
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/*****************************************************************************/
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/**
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* @brief a slot alignment, base on physical layer information.
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*
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* @param instPtr a pointer to linklayer layer instance
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* @param frameNum
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* @param slotNum
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*
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* @return SUCCESS Initialize successfully.
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* FAILURE Initialization failed, allocate memory fail or initial
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* bram controller fail.
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*
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******************************************************************************/
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// TODO: Check
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int32_t L2_TimeAlign(L2_INST* instPtr, uint32_t frameNum, uint32_t slotNum, bool relative){
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L1_FRAME_TYPE lastRecvdFrame;
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lastRecvdFrame = Phy_GetLastRecvFrameType(instPtr->config.phyInstPtr);
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if(lastRecvdFrame == L1_NONE_FRAME){
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return EIGNORE;
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}
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// read nextSendTime from physical layer
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uint64_t currTime, expctTime;
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int64_t timeDiff;
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TIME_WORD timeStamp, slotTimerAdjmet;
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expctTime = ((uint64_t)(frameNum * L2_SLOTS_PER_FRAME + slotNum)) * TIME_FRAC_MAX;
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expctTime += Phy_GetTimeComp(lastRecvdFrame);
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if(relative) {
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expctTime += (uint64_t)instPtr->netStartTime * L2_SLOTS_PER_FRAME * TIME_FRAC_MAX;
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}
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Phy_GetLastReceivedFrameSyncTimeStamp(instPtr->config.phyInstPtr, &timeStamp);
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currTime = (uint64_t)timeStamp.frac_part;
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currTime += ((uint64_t)timeStamp.int_part) * TIME_FRAC_MAX;
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timeDiff = (int64_t)(expctTime - currTime);
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slotTimerAdjmet.int_part = (uint32_t)(timeDiff / TIME_FRAC_MAX);
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slotTimerAdjmet.frac_part = (uint32_t)(timeDiff % TIME_FRAC_MAX);
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TimeCtrl_TimeAdjust(instPtr->config.tmcInstPtr, &slotTimerAdjmet, TM_ADJ_ADD);
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return SUCCESS;
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}
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/*****************************************************************************/
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/**
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* @brief Update corrent time-sync for RTT stage
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*
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* @param scanFsmPtr A pointer to scan net fsm.
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* @param newSatge New state.
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*
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* @return NONE.
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*
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******************************************************************************/
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static void RTT_StageUpdate(L2_RTT_FSM* rttFsmPtr, L2_RTT_STGE newStage) {
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ASSERT(rttFsmPtr != NULL);
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ASSERT(newStage >= RTT_NONE_STAGE && newStage <= RTT_RSP2);
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DBG_INFO("RTT Stage Update: %d -> %d.\n", rttFsmPtr->rttStage, newStage);
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rttFsmPtr->rttStage = newStage;
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}
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/*****************************************************************************/
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/**
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* @brief Reset RTT FSM
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*
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* @param rttFsmPtr a pointer to rtt FSM instance.
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*
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* @return NONE
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*
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******************************************************************************/
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void RTT_Reset(L2_RTT_FSM* rttFsmPtr){
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ASSERT(rttFsmPtr != NULL);
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memset(&(rttFsmPtr->rttRecord), 0x00, sizeof(RTT_RECORD));
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rttFsmPtr->rttStage = RTT_REQ1;
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rttFsmPtr->isR1Valid = false;
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rttFsmPtr->isR2Valid = false;
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rttFsmPtr->isR3Valid = false;
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rttFsmPtr->isR4Valid = false;
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rttFsmPtr->timeStamp.int_part = 0;
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rttFsmPtr->timeStamp.frac_part = 0;
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rttFsmPtr->doppler = 0;
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}
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/*****************************************************************************/
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/**
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* @brief Destroy RTT FSM, free allocated memory.
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*
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* @param rttFsmPtr a pointer to rtt FSM instance.
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*
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* @return NONE
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*
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******************************************************************************/
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void RTT_Destroy(L2_RTT_FSM* rttFsmPtr){
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free(rttFsmPtr);
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}
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/*****************************************************************************/
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/**
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* @brief Get the frame start time. If torType == L2_TOR_TX, get the next
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* slot start time, if torType == L2_TOR_RX get last frame start
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* time.
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*
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* @param instPtr a pointer to linklayer layer instance
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* @param tmStamp a pointer to store frame start time
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* @param torType tx/rx mode
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*
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* @return NONE
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*
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******************************************************************************/
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void RTT_GetFrameStart(L2_INST* instPtr, TIME_WORD *tmStamp, L2_TOR_TYPE torType){
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ASSERT(instPtr != NULL);
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ASSERT(tmStamp != NULL);
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// Get the next frame start time
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if(torType == L2_TOR_TX) {
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tmStamp->int_part = L2_GetNextFrameNum(instPtr)*L2_SLOTS_PER_FRAME + L2_GetNextSlotNum(instPtr);
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tmStamp->frac_part = 0 ;
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}
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// Get the last reiceive frame start time
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else if(torType == L2_TOR_RX) {
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PHY_INST* phyRef = instPtr->config.phyInstPtr;
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TIME_WORD timeStamp;
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int64_t timeDiff;
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Phy_GetLastReceivedFrameSyncTimeStamp(phyRef, &timeStamp);
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timeDiff = (uint64_t) timeStamp.frac_part;
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timeDiff += ((uint64_t)timeStamp.int_part) * TIME_FRAC_MAX;
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Phy_GetLastReceivedSlotStartTimeStamp(phyRef, tmStamp);
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timeDiff -= ((uint64_t) tmStamp->int_part) * TIME_FRAC_MAX;
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timeDiff -= (uint64_t) tmStamp->frac_part;
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timeDiff = (int64_t)Phy_GetTimeComp(L2_L2frame2L1frame(L2_GetLastFrameType(instPtr))) - timeDiff;
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if (timeDiff < 0) {
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timeDiff += TIME_FRAC_MAX;
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tmStamp->int_part--;
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_nop_();
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}
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tmStamp->frac_part = (TIME_FRAC)timeDiff;
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}
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else {
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*tmStamp = RTT_TIME_NONE;
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DBG_ERROR("Unexpected tx/rx mode, setting dummy values.\n");
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}
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}
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/*****************************************************************************/
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/**
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* @brief Initialize RTT FSM, allocate memory for FSM instance.
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*
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* @param rttFsmPtr
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*
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* @return SUCCESS Initialization successful.
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* EMAC_MEMORY_ALLOC_ERROR Memory allocate error.
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*
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******************************************************************************/
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int32_t RTT_Init(L2_RTT_FSM** rttFsmPtr){
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(*rttFsmPtr) = (L2_RTT_FSM*) malloc(sizeof(L2_RTT_FSM));
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if (*rttFsmPtr == NULL) {
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free(*rttFsmPtr);
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return EALLOC;
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}
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RTT_Reset(*rttFsmPtr);
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return SUCCESS;
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}
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/*****************************************************************************/
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/**
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* @brief Update RTT FSM accordingly.
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*
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* @param instPtr a pointer to linklayer layer instance
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* @param torType tx/rx mode type
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*
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* @return SUCCESS
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* error code
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*
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******************************************************************************/
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int32_t RTT_FsmUpdate(L2_INST* instPtr, L2_TOR_TYPE torType) {
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ASSERT(instPtr != NULL);
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L2_RTT_FSM* rttFsmPtr = L2_GetRttFsm(instPtr);
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RTT_RECORD* rttRecord = &(rttFsmPtr->rttRecord);
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PHY_INST *phyRef = instPtr->config.phyInstPtr;
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DBG_INFO("-------- RTT FSM Update --------\n");
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// Stage trans
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// For Head Node: Tx->Rx->Tx->Rx
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if(L2_GetNodeType(instPtr) == L2_NODE_HEAD){
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switch(rttFsmPtr->rttStage) {
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case RTT_REQ1 :
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if(torType == L2_TOR_TX){
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DBG_INFO("Prepare data for RTT REQ-1\n");
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// Update Tt1
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RTT_GetFrameStart(instPtr, &(rttRecord->Tt1), torType);
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DBG_INFO("Tt1-timeL:%u.\n", rttRecord->Tt1.int_part);
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DBG_INFO("Tt1-timeH:%u.\n", rttRecord->Tt1.frac_part);
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// Prepare data for sending...
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rttFsmPtr->timeStamp = rttRecord->Tt1;
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rttFsmPtr->doppler = RTT_DOPPLER_NONE;
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RTT_StageUpdate(rttFsmPtr, RTT_RSP1);
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}
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else{
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DBG_INFO("RTT FSM remain current state [%d].\n", rttFsmPtr->rttStage);
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}
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break;
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case RTT_RSP1 :
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if(torType == L2_TOR_RX){
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if(L2_isDataAvail(instPtr) == true){
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DBG_INFO("RTT RSP-1 have been received.\n");
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DBG_INFO("Preparing data for RTT REQ-2.\n");
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rttFsmPtr->isR2Valid = true;
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// Update doppler
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rttRecord->dopplerR2 = (int32_t)Phy_GetCoarseFreqEst(phyRef);
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// Update Tr2
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RTT_GetFrameStart(instPtr, &(rttRecord->Tr2), torType);
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// Calculate TroundA
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TimeCtrl_CalculateTimeGap(&(rttRecord->Tt1), &(rttRecord->Tr2), &(rttRecord->TroundA));
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}
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else{
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DBG_WARNING("RTT RSP-1 had not been received [Stage: %d].\n", rttFsmPtr->rttStage);
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DBG_WARNING("Set Tr2 dopplerR2 and TroundA to dummy value.\n");
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rttFsmPtr->isR2Valid = false;
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rttRecord->dopplerR2 = RTT_DOPPLER_NONE;
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rttRecord->Tr2 = RTT_TIME_NONE;
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rttRecord->TroundA = RTT_TIME_NONE;
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}
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DBG_INFO("dopplerR2:%d.\n", rttRecord->dopplerR2);
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DBG_INFO("Tr2-timeL:%u.\n", rttRecord->Tr2.frac_part);
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DBG_INFO("Tr2-timeH:%u.\n", rttRecord->Tr2.int_part);
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DBG_INFO("TroundA-timeL:%u.\n", rttRecord->TroundA.frac_part);
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DBG_INFO("TroundA-timeH:%u.\n", rttRecord->TroundA.int_part);
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RTT_StageUpdate(rttFsmPtr, RTT_REQ2);
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}
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else{
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DBG_INFO("RTT FSM remain current state [%d].\n", rttFsmPtr->rttStage);
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}
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break;
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case RTT_REQ2 :
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if(torType == L2_TOR_TX){
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DBG_INFO("Prepare data for RTT REQ-2\n");
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// Update Tt3
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RTT_GetFrameStart(instPtr, &(rttRecord->Tt3), torType);
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if ( rttFsmPtr->isR2Valid ) {
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// Calculate reply A
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TimeCtrl_CalculateTimeGap(&(rttRecord->Tt3), &(rttRecord->Tr2), &(rttRecord->TreplyA));
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}
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else {
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DBG_WARNING("RTT RSP-1 have not been received [Stage: %d].\n", rttFsmPtr->rttStage);
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DBG_WARNING("Set TreplyA to dummy value.\n");
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rttRecord->TreplyA = RTT_TIME_NONE;
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}
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DBG_INFO("Tt3-timeL:%u.\n", rttRecord->Tt3.frac_part);
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DBG_INFO("Tt3-timeH:%u.\n", rttRecord->Tt3.int_part);
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DBG_INFO("TreplyA-timeL:%u.\n", rttRecord->TreplyA.frac_part);
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DBG_INFO("TreplyA-timeH:%u.\n", rttRecord->TreplyA.int_part);
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// Prepare data for sending.
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rttFsmPtr->timeStamp = rttRecord->TroundA;
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rttFsmPtr->doppler = rttRecord->dopplerR2;
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RTT_StageUpdate(rttFsmPtr, RTT_RSP2);
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}
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else{
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DBG_INFO("RTT FSM remain current state [%d].\n", rttFsmPtr->rttStage);
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}
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break;
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case RTT_RSP2 :
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if(torType == L2_TOR_RX){
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if(L2_isDataAvail(instPtr) == true){
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DBG_INFO("RTT RSP-2 have been received.\n");
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rttFsmPtr->isR4Valid = true;
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// Update doppler
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double doppler = Phy_GetCoarseFreqEst(phyRef);
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rttRecord->dopplerR2 = (int32_t)doppler;
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// Update Tr4
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RTT_GetFrameStart(instPtr, &(rttRecord->Tr4), torType);
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// Calculate TroundA
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TimeCtrl_CalculateTimeGap(&(rttRecord->Tt3), &(rttRecord->Tr4), &(rttRecord->TroundA));
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}
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else{
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DBG_WARNING("RTT RSP-1 have not been received [Stage: %d].\n", rttFsmPtr->rttStage);
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DBG_WARNING("Set Tr4 dopplerR4 and TroundA to dummy value.\n");
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rttFsmPtr->isR4Valid = false;
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rttRecord->dopplerR4 = RTT_DOPPLER_NONE;
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rttRecord->Tr4 = RTT_TIME_NONE;
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rttRecord->TroundA = RTT_TIME_NONE;
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}
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DBG_INFO("dopplerR4:%d.\n", rttRecord->dopplerR4);
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DBG_INFO("Tr4-timeL:%u.\n", rttRecord->Tr4.frac_part);
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DBG_INFO("Tr4-timeH:%u.\n", rttRecord->Tr4.int_part);
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DBG_INFO("TroundA-timeL:%u.\n", rttRecord->TroundA.frac_part);
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DBG_INFO("TroundA-timeH:%u.\n", rttRecord->TroundA.int_part);
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RTT_StageUpdate(rttFsmPtr, RTT_REQ1);
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DBG_INFO("RTT procedure end...\n");
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}
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else{
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DBG_INFO("RTT FSM remain current state [%d].\n", rttFsmPtr->rttStage);
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}
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break;
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default :
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DBG_ERROR("Unexpected RTT FSM stage [%d].\n", rttFsmPtr->rttStage);
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break;
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}
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}
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// For Member Node: Rx->Tx->Rx->Tx
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else{
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switch(rttFsmPtr->rttStage) {
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case RTT_REQ1 :
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if(torType == L2_TOR_RX){
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if(L2_isDataAvail(instPtr) == true){
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DBG_INFO("RTT REQ-1 have been received.\n");
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DBG_INFO("Preparing data for RTT RSP-1.\n");
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rttFsmPtr->isR2Valid = true;
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// Update doppler
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rttRecord->dopplerR2 = (int32_t)Phy_GetCoarseFreqEst(phyRef);
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// Update Tr1
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RTT_GetFrameStart(instPtr, &(rttRecord->Tr1), torType);
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}
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else{
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DBG_WARNING("RTT REQ-1 have not been received [Stage: %d].\n", rttFsmPtr->rttStage);
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DBG_WARNING("Set dopplerR1 and Tr1 to dummy value.\n");
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rttFsmPtr->isR1Valid = false;
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rttRecord->dopplerR1 = RTT_DOPPLER_NONE;
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rttRecord->Tr1 = RTT_TIME_NONE;
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}
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DBG_INFO("dopplerR1:%d.\n", rttRecord->dopplerR1);
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DBG_INFO("Tr1-timeL:%u.\n", rttRecord->Tr1.frac_part);
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DBG_INFO("Tr1-timeH:%u.\n", rttRecord->Tr1.int_part);
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RTT_StageUpdate(rttFsmPtr, RTT_RSP1);
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}
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else{
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DBG_INFO("RTT FSM remain current state [%d].\n", rttFsmPtr->rttStage);
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}
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break;
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case RTT_RSP1 :
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if(torType == L2_TOR_TX){
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DBG_INFO("Prepare data for RTT RSP-1\n");
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// Update Tt2
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RTT_GetFrameStart(instPtr, &(rttRecord->Tt2), torType);
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if ( rttFsmPtr->isR1Valid ) {
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// Calculate reply B
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TimeCtrl_CalculateTimeGap(&(rttRecord->Tr1), &(rttRecord->Tt2), &(rttRecord->TreplyB));
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}
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else {
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rttRecord->TreplyB = RTT_TIME_NONE;
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DBG_WARNING("RTT REQ-1 have not been received [Stage: %d].\n", rttFsmPtr->rttStage);
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DBG_WARNING("Set ReplayB to dummy value.\n");
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}
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DBG_INFO("Tt2-timeL:%u.\n", rttRecord->Tt2.frac_part);
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DBG_INFO("Tt2-timeH:%u.\n", rttRecord->Tt2.int_part);
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DBG_INFO("TreplyB-timeL:%u.\n", rttRecord->TreplyB.frac_part);
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DBG_INFO("TreplyB-timeH:%u.\n", rttRecord->TreplyB.int_part);
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// Prepare data for sending.
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rttFsmPtr->timeStamp = rttRecord->TreplyB;
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rttFsmPtr->doppler = rttRecord->dopplerR1;
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RTT_StageUpdate(rttFsmPtr, RTT_REQ2);
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}
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else{
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DBG_INFO("RTT FSM remain current state [%d].\n", rttFsmPtr->rttStage);
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}
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break;
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case RTT_REQ2 :
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if(torType == L2_TOR_RX){
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if(L2_isDataAvail(instPtr) == true){
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DBG_INFO("RTT REQ-2 have been received.\n");
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DBG_INFO("Preparing data for RTT RSP-2.\n");
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rttFsmPtr->isR3Valid = true;
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// Update doppler
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rttRecord->dopplerR2 = (int32_t)Phy_GetCoarseFreqEst(phyRef);
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// Update Tr3
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RTT_GetFrameStart(instPtr, &(rttRecord->Tr3), torType);
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// Calculate TroundB
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TimeCtrl_CalculateTimeGap(&(rttRecord->Tt2), &(rttRecord->Tr3), &(rttRecord->TroundB));
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}
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else{
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DBG_WARNING("RTT REQ-2 have not been received [Stage: %d].\n", rttFsmPtr->rttStage);
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DBG_WARNING("Set dopplerR3 and ReplayB to dummy value.\n");
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rttFsmPtr->isR3Valid = false;
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rttRecord->dopplerR3 = RTT_DOPPLER_NONE;
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rttRecord->TroundB = RTT_TIME_NONE;
|
|
}
|
|
DBG_INFO("dopplerR3:%d.\n", rttRecord->dopplerR3);
|
|
DBG_INFO("Tr3-timeL:%u.\n", rttRecord->Tr3.frac_part);
|
|
DBG_INFO("Tr3-timeH:%u.\n", rttRecord->Tr3.int_part);
|
|
DBG_INFO("TroundB-timeL:%u.\n", rttRecord->TroundB.frac_part);
|
|
DBG_INFO("TroundB-timeH:%u.\n", rttRecord->TroundB.int_part);
|
|
RTT_StageUpdate(rttFsmPtr, RTT_RSP2);
|
|
}
|
|
else{
|
|
DBG_INFO("RTT FSM remain current state [%d].\n", rttFsmPtr->rttStage);
|
|
}
|
|
break;
|
|
case RTT_RSP2 :
|
|
if(torType == L2_TOR_TX){
|
|
DBG_INFO("Prepare data for RTT RSP-2\n");
|
|
// Update Tt4
|
|
RTT_GetFrameStart(instPtr, &(rttRecord->Tt4), torType);
|
|
if ( rttFsmPtr->isR3Valid ) {
|
|
// Calculate reply B
|
|
TimeCtrl_CalculateTimeGap(&(rttRecord->Tr3), &(rttRecord->Tt4), &(rttRecord->TreplyB));
|
|
// TODO: implement a time adjustment.
|
|
}
|
|
else {
|
|
DBG_WARNING("RTT REQ-2 have not been received [Stage: %d].\n", rttFsmPtr->rttStage);
|
|
DBG_WARNING("Set ReplayB to dummy value.\n");
|
|
rttRecord->TreplyB = RTT_TIME_NONE;
|
|
}
|
|
DBG_INFO("Tt4-timeL:%u.\n", rttRecord->Tt4.frac_part);
|
|
DBG_INFO("Tt4-timeH:%u.\n", rttRecord->Tt4.int_part);
|
|
DBG_INFO("TreplyB-timeL:%u.\n", rttRecord->TreplyB.frac_part);
|
|
DBG_INFO("TreplyB-timeH:%u.\n", rttRecord->TreplyB.int_part);
|
|
|
|
// Prepare data for sending.
|
|
rttFsmPtr->timeStamp = rttRecord->TreplyB;
|
|
rttFsmPtr->doppler = rttRecord->dopplerR3;
|
|
RTT_StageUpdate(rttFsmPtr, RTT_REQ1);
|
|
DBG_INFO("RTT procedure end...\n");
|
|
}
|
|
else{
|
|
DBG_INFO("RTT FSM remain current state [%d].\n", rttFsmPtr->rttStage);
|
|
}
|
|
break;
|
|
default:
|
|
DBG_ERROR("Unexpected RTT FSM stage [%d].\n", rttFsmPtr->rttStage);
|
|
break;
|
|
}
|
|
}
|
|
return SUCCESS;
|
|
}
|