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Merge pull request #978 from PX4/mtk_fix

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Mtk fix
This commit is contained in:
Thomas Gubler
2014-05-19 22:41:54 +02:00
parent 98f05ea5c1 f0630547aa
commit b250e28abf
1 changed files with 8 additions and 2 deletions
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src/drivers/gps/mtk.cpp
+8 -2
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@@ -249,12 +249,18 @@ MTK::handle_message(gps_mtk_packet_t &packet)
warnx("mtk: unknown revision");
_gps_position->lat = 0;
_gps_position->lon = 0;
// Indicate this data is not usable and bail out
_gps_position->eph_m = 1000.0f;
_gps_position->epv_m = 1000.0f;
_gps_position->fix_type = 0;
return;
}
_gps_position->alt = (int32_t)(packet.msl_altitude * 10); // from cm to mm
_gps_position->fix_type = packet.fix_type;
_gps_position->eph_m = packet.hdop; // XXX: Check this because eph_m is in m and hdop is without unit
_gps_position->epv_m = 0.0; //unknown in mtk custom mode
_gps_position->eph_m = packet.hdop / 100.0f; // from cm to m
_gps_position->epv_m = _gps_position->eph_m; // unknown in mtk custom mode, so we cheat with eph
_gps_position->vel_m_s = ((float)packet.ground_speed) * 1e-2f; // from cm/s to m/s
_gps_position->cog_rad = ((float)packet.heading) * M_DEG_TO_RAD_F * 1e-2f; //from deg *100 to rad
_gps_position->satellites_visible = packet.satellites;