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From f3e7feaccddd5bc249be06dadd7cc96d10dcee22 Mon Sep 17 00:00:00 2001
From: Serhii Voloshynov <serhii.voloshynov@globallogic.com>
Date: Thu, 3 Dec 2020 12:59:37 +0200
Subject: [PATCH] ubx time leap seconds
---
driver_ubx.c | 128 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 127 insertions(+), 1 deletion(-)
diff --git a/driver_ubx.c b/driver_ubx.c
index 6464d94..a5f3737 100644
--- a/driver_ubx.c
+++ b/driver_ubx.c
@@ -61,6 +61,29 @@
#define UBX_CFG_LEN 20
#define outProtoMask 14
+#ifdef UBLOXTIMELS_ENABLE
+/* UBX-NAV-TIMELS support */
+static char *srcOfCurrLs[] = {
+ "firmware",
+ "GPS GLONASS difference",
+ "GPS",
+ "SBAS",
+ "BeiDou",
+ "Galileo",
+ "Aided data",
+ "Configured"
+};
+static char *srcOfLsChange[] = {
+ "No Source",
+ "Undefined",
+ "GPS",
+ "SBAS",
+ "BeiDou",
+ "Galileo",
+ "GLONOSS",
+};
+#endif /* UBLOXTIMELS_ENABLE */
+
static gps_mask_t ubx_parse(struct gps_device_t *session, unsigned char *buf,
size_t len);
static gps_mask_t ubx_msg_nav_eoe(struct gps_device_t *session,
@@ -810,6 +833,90 @@ static void ubx_msg_nav_timels(struct gps_device_t *session,
}
}
+#ifdef UBLOXTIMELS_ENABLE
+/**
+ * Navigation time to leap second
+ *
+ * Sets leap_notify if leap second is < 23 hours away.
+ */
+static void
+ubx_msg_nav_timels(struct gps_device_t *session, unsigned char *buf,
+ size_t data_len)
+{
+ int version;
+ unsigned int flags;
+ int valid_curr_ls;
+ int valid_time_to_ls_event;
+
+ if (data_len != 24) {
+ gpsd_log(&session->context->errout, LOG_WARN,
+ "UBX-NAV-TIMELS: unexpected length %d, expecting 24\n",
+ data_len);
+ return;
+ }
+ version = getsb(buf,4);
+ /* Only version 0 is defined so far. */
+ flags = (unsigned int)getub(buf, 23);
+ gpsd_log(&session->context->errout, LOG_DATA,
+ "UBX-NAV-TIMELS: flags 0x%x message version %d\n",flags, version);
+ valid_curr_ls = flags & UBX_TIMELS_VALID_CURR_LS;
+ valid_time_to_ls_event = flags & UBX_TIMELS_VALID_TIME_LS_EVT;
+ if(valid_curr_ls) {
+ unsigned int src_of_curr_ls = getub(buf,8);
+ int curr_ls = getsb(buf,9);
+ char *src = "Unknown";
+
+ if(src_of_curr_ls < (sizeof srcOfCurrLs/(sizeof srcOfCurrLs[0])))
+ src = srcOfCurrLs[src_of_curr_ls];
+
+ gpsd_log(&session->context->errout, LOG_DATA,
+ "UBX-NAV-TIMELS: source_of_current_leapsecond=%u:%s curr_ls=%d\n",
+ src_of_curr_ls,src,curr_ls);
+ session->context->leap_seconds = curr_ls;
+ session->context->valid |= LEAP_SECOND_VALID;
+ } /* Valid current leap second */
+ if(valid_time_to_ls_event) {
+ char *src="Unknown";
+ unsigned int src_of_ls_change;
+ unsigned short dateOfLSGpsWn, dateOfLSGpsDn;
+ int lsChange = getsb(buf,11);
+ int timeToLsEvent = getles32(buf,12);
+ src_of_ls_change = getub(buf,10);
+ if(src_of_ls_change < (sizeof srcOfLsChange/(sizeof srcOfLsChange[0])))
+ src = srcOfLsChange[src_of_ls_change];
+ dateOfLSGpsWn = getles16(buf,16);
+ dateOfLSGpsDn = getles16(buf,18);
+ gpsd_log(&session->context->errout, LOG_DATA,
+ "UBX_NAV_TIMELS: source_of_leapsecond_change=%u:%s "
+ "leapSecondChage=%d timeToLsEvent=%d\n",
+ src_of_ls_change,src,lsChange,timeToLsEvent);
+ gpsd_log(&session->context->errout, LOG_DATA,
+ "UBX_NAV_TIMELS: dateOfLSGpsWn=%d dateOfLSGpsDn=%d\n",
+ dateOfLSGpsWn,dateOfLSGpsDn);
+ if(timeToLsEvent < 60*60*23 && timeToLsEvent > 0) {
+ if(lsChange == 0)
+ session->context->leap_notify = LEAP_NOWARNING;
+ else if (lsChange == 1)
+ session->context->leap_notify = LEAP_ADDSECOND;
+ else if (lsChange == -1)
+ session->context->leap_notify = LEAP_DELSECOND;
+ } else
+ session->context->leap_notify = LEAP_NOWARNING;
+
+ if (session->context->leap_notify == LEAP_ADDSECOND)
+ gpsd_log(&session->context->errout,LOG_INF,
+ "UBX_NAV_TIMELS: Add leap second today\n");
+ else if (session->context->leap_notify == LEAP_DELSECOND)
+ gpsd_log(&session->context->errout,LOG_INF,
+ "UBX_NAV_TIMELS: Remove leap second today\n");
+
+ gpsd_log(&session->context->errout, LOG_DATA,
+ "UBX_NAV_TIMELS: leaving: leap_notify=%d\n",
+ session->context->leap_notify);
+ }
+}
+#endif /* UBLOXTIMELS_ENABLE */
+
/**
* Geodetic position solution message
* UBX-NAV-POSLLH, Class 1, ID 2
@@ -1767,7 +1874,10 @@ gps_mask_t ubx_parse(struct gps_device_t * session, unsigned char *buf,
mask = ubx_msg_nav_timegps(session, &buf[UBX_PREFIX_LEN], data_len);
break;
case UBX_NAV_TIMELS:
- ubx_msg_nav_timels(session, &buf[UBX_PREFIX_LEN], data_len);
+ gpsd_log(&session->context->errout, LOG_DATA, "UBX_NAV_TIMELS\n");
+#ifdef UBLOXTIMELS_ENABLE
+ ubx_msg_nav_timels(session, &buf[UBX_PREFIX_LEN],data_len);
+#endif // UBLOXTIMELS_ENABLE
break;
case UBX_NAV_TIMEUTC:
gpsd_log(&session->context->errout, LOG_DATA, "UBX-NAV-TIMEUTC\n");
@@ -1811,6 +1921,7 @@ gps_mask_t ubx_parse(struct gps_device_t * session, unsigned char *buf,
gpsd_log(&session->context->errout, LOG_DATA, "UBX-RXM-RTCM\n");
break;
case UBX_RXM_SFRB:
+ gpsd_log(&session->context->errout, LOG_DATA, "UBX_RXM_SFRB\n");
mask = ubx_rxm_sfrb(session, &buf[UBX_PREFIX_LEN], data_len);
break;
case UBX_RXM_SFRBX:
@@ -2154,11 +2265,19 @@ static void ubx_cfg_prt(struct gps_device_t *session,
msg[2] = 0x00; /* rate */
(void)ubx_write(session, 0x06u, 0x01, msg, 3);
+#ifdef UBLOXTIMELS_ENABLE
+ msg[0] = 0x01; /* class */
+ msg[1] = 0x26; /* msg id = UBX_NAV_TIMELS */
+ msg[2] = 0xff; /* rate */
+#endif /* UBLOXTIMELS_ENABLE */
+ (void)ubx_write(session, 0x06u, 0x01, msg, 3);
+
/* NAV-SVINFO became NAV-SAT */
msg[0] = 0x01; /* class */
msg[1] = 0x30; /* msg id = NAV-SVINFO */
msg[2] = 0x00; /* rate */
(void)ubx_write(session, 0x06u, 0x01, msg, 3);
+
msg[0] = 0x01; /* class */
msg[1] = 0x35; /* msg id = NAV-SAT */
msg[2] = 0x00; /* rate */
@@ -2263,6 +2382,13 @@ static void ubx_cfg_prt(struct gps_device_t *session,
msg[2] = 0x01; /* rate */
(void)ubx_write(session, 0x06u, 0x01, msg, 3);
+#ifdef UBLOXTIMELS_ENABLE
+ msg[0] = 0x01; /* class */
+ msg[1] = 0x26; /* msg id = UBX_NAV_TIMELS */
+ msg[2] = 0xff; /* rate */
+ (void)ubx_write(session, 0x06u, 0x01, msg, 3);
+#endif /* UBLOXTIMELS_ENABLE */
+
/* UBX-NAV-SVINFO deprecated in u-blox 8, gone in u-blox 9.
* Use UBX-NAV-SAT after u-blox 7 */
if (10 > session->driver.ubx.protver) {
--
2.7.4
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