Initial version.

2023-12-20 00:11:03 +08:00
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+/*****************************************************************************/
+/**
+ * Description: A simplified version of timesync for datalink 814 (Dijian)
+ * 
+ * Date: 2021-12-04 16:32
+ * LastEditors: Fan Hao
+ * LastEditTime: 2022-07-06 16:32
+ * Revisions: Rev 0.0
+ * History: 
+ * [2022-07-06]: Initial version.
+ * [2021-12-04]: Initial version.
+ * 
+ * Copyright(c) 2021 Beijing Institute of Technology.
+ * Lab of Communication and Networking
+ * 
+ ******************************************************************************/
+
+#ifndef RTT_H_
+#define RTT_H_
+
+/***************************** Include Files *********************************/
+#include <stdint.h>
+#include "linklayer814.h"
+#include "linklayer814_types.h"
+
+/************************** Constant Definitions *****************************/
+#define MAX_FREQ_EST_NUM 128 // 32bit word
+#define SVC_FREQ_EST_NUM 512 // byte
+#define MGMT_FREQ_EST_NUM 512 // byte
+#define BISAR_FREQ_EST_NUM 480 // byte
+
+#define CXR_FREQ 3800000000.0       // Hz
+
+#define LIGHT_SPPED_AIR 299702547.0 // m/s
+#define LIGHT_SPPED_VAC 299792458.0 // m/s
+
+#define RCV2FSYNC_CLOCKS 0 // clocks from frame sync time to receive time
+#define PHYRSP_DELAY_CLOCKS 0// clocks from frame sync time to receive time
+//#define PHY_SYNCT2FEND_200K 904052L
+//#define PHY_SYNCT2FEND_200K 924232L
+#define PHY_SYNCT2FEND_200K 905052L
+
+#define RTT_TIME_NONE	UINT32_MAX
+#define RTT_DOPPLER_NONE	UINT32_MAX
+
+
+/***************** Macros (Inline Functions) Definitions *********************/
+
+/**************************** Type Definitions *******************************/
+
+// TODO: Multi-node RTT
+typedef struct {
+	L2_TIME_WORD Tt1;
+	L2_TIME_WORD Tr1;
+	L2_TIME_WORD Tt2;
+	L2_TIME_WORD Tr2;
+	L2_TIME_WORD Tt3;
+	L2_TIME_WORD Tr3;
+	L2_TIME_WORD Tt4;
+	L2_TIME_WORD Tr4;
+	int32_t dopplerR1;
+	int32_t dopplerR2;
+	int32_t dopplerR3;
+	int32_t dopplerR4;
+	L2_TIME_WORD TroundA;
+	L2_TIME_WORD TreplyA;
+	L2_TIME_WORD TroundB;
+	L2_TIME_WORD TreplyB;
+	int32_t rttAdj;
+} RTT_RECORD;
+
+typedef enum {
+	RTT_NONE_STAGE = 0,
+	RTT_REQ1 = 1,
+	RTT_RSP1 = 2,
+	RTT_REQ2 = 3,
+	RTT_RSP2 = 4, // Rtt Stages
+} L2_RTT_SATGE;
+
+typedef struct {
+	L2_RCD rttStatge;
+	bool isR1Valid;
+	bool isR2Valid;
+	bool isR3Valid;
+	bool isR4Valid;
+	RTT_RECORD rttRecord;
+} L2_RTT_FSM;
+
+typedef enum {
+	RTT_NONE = 0,
+	RTT_SEND = 1,
+	RTT_RCV = 2,
+} L2_RTT_TOR;
+
+/************************** Function Prototypes ******************************/
+
+// RTT
+L2_RTT_SATGE RTT_GetLastStage(L2_RTT_FSM* rttFsmPtr);
+L2_RTT_SATGE RTT_GetCurrentStage(L2_RTT_FSM* rttFsmPtr);
+L2_RTT_SATGE RTT_GetNextStage(L2_RTT_FSM* rttFsmPtr);
+
+#endif /* RTT_H_ */