diff options
Diffstat (limited to 'src/modules')
-rw-r--r-- | src/modules/mavlink/mavlink_receiver.cpp | 25 | ||||
-rw-r--r-- | src/modules/mavlink/mavlink_receiver.h | 2 |
2 files changed, 16 insertions, 11 deletions
diff --git a/src/modules/mavlink/mavlink_receiver.cpp b/src/modules/mavlink/mavlink_receiver.cpp index 93a297285..97108270c 100644 --- a/src/modules/mavlink/mavlink_receiver.cpp +++ b/src/modules/mavlink/mavlink_receiver.cpp @@ -947,14 +947,18 @@ MavlinkReceiver::handle_message_system_time(mavlink_message_t *msg) clock_gettime(CLOCK_REALTIME, &tv); // date -d @1234567890: Sat Feb 14 02:31:30 MSK 2009 - bool onb_unix_valid = tv.tv_sec > 1234567890ULL; - bool ofb_unix_valid = time.time_unix_usec > 1234567890ULL * 1000ULL; + bool onb_unix_valid = tv.tv_sec > PX4_EPOCH_SECS; + bool ofb_unix_valid = time.time_unix_usec > PX4_EPOCH_SECS * 1000ULL; if (!onb_unix_valid && ofb_unix_valid) { tv.tv_sec = time.time_unix_usec / 1000000ULL; tv.tv_nsec = (time.time_unix_usec % 1000000ULL) * 1000ULL; - clock_settime(CLOCK_REALTIME, &tv); - warnx("[timesync] synced.."); + if(clock_settime(CLOCK_REALTIME, &tv)) { + warn("failed setting clock"); + } + else { + warnx("[timesync] UTC time synced."); + } } } @@ -965,7 +969,7 @@ MavlinkReceiver::handle_message_timesync(mavlink_message_t *msg) mavlink_timesync_t tsync; mavlink_msg_timesync_decode(msg, &tsync); - uint64_t now_ns = hrt_absolute_time() * 1000 ; + uint64_t now_ns = hrt_absolute_time() * 1000LL ; if (tsync.tc1 == 0) { @@ -980,13 +984,12 @@ MavlinkReceiver::handle_message_timesync(mavlink_message_t *msg) } else if (tsync.tc1 > 0) { - int64_t offset_ns = (9*_time_offset + (tsync.ts1 + now_ns - tsync.tc1*2)/2 )/10; // average offset + int64_t offset_ns = (tsync.ts1 + now_ns - tsync.tc1*2)/2 ; int64_t dt = _time_offset - offset_ns; - if (dt > 10000000 || dt < -1000000) { // 10 millisecond skew - _time_offset = (tsync.ts1 + now_ns - tsync.tc1*2)/2; - warnx("[timesync] Resetting."); - + if (dt > 10000000LL || dt < -10000000LL) { // 10 millisecond skew + _time_offset = offset_ns; + warnx("[timesync] Hard setting offset."); } else { smooth_time_offset(offset_ns); } @@ -1469,7 +1472,7 @@ uint64_t MavlinkReceiver::to_hrt(uint64_t usec) void MavlinkReceiver::smooth_time_offset(uint64_t offset_ns) { - /* alpha = 0.75 fixed for now. The closer alpha is to 1.0, + /* alpha = 0.6 fixed for now. The closer alpha is to 1.0, * the faster the moving average updates in response to * new offset samples. */ diff --git a/src/modules/mavlink/mavlink_receiver.h b/src/modules/mavlink/mavlink_receiver.h index a677e75cd..4afc9b372 100644 --- a/src/modules/mavlink/mavlink_receiver.h +++ b/src/modules/mavlink/mavlink_receiver.h @@ -75,6 +75,8 @@ #include "mavlink_ftp.h" +#define PX4_EPOCH_SECS 1234567890ULL + class Mavlink; class MavlinkReceiver |