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OP-116 AHRS: Made data going to the AHRS in NED format. Once the final estimate object is created I'll repeat the same calculation to populate it, although we want to avoid going back to LLA format on the OP because the CPU requirements are excessive.

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git-svn-id: svn://svn.openpilot.org/OpenPilot/trunk@1376 ebee16cc-31ac-478f-84a7-5cbb03baadba
This commit is contained in:
peabody124 2010-08-22 19:01:36 +00:00 committed by peabody124
parent 6adc834d9b
commit 2e705e6836
2 changed files with 22 additions and 12 deletions
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27
flight/OpenPilot/Modules/AHRSComms/ahrs_comms.c
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@ -61,6 +61,7 @@
#include "positionactual.h"
#include "homelocation.h"
#include "ahrscalibration.h"
#include "CoordinateConversions.h"
#include "pios_opahrs.h" // library for OpenPilot AHRS access functions
#include "pios_opahrs_proto.h"
@ -364,14 +365,26 @@ static void load_gps_position(struct opahrs_msg_v1_req_update * update)
HomeLocationData home;
HomeLocationGet(&home);
update->gps.updated = 1;
update->gps.NED[0] = 0;
update->gps.NED[1] = 0;
update->gps.NED[2] = 0;
update->gps.groundspeed = 0;
update->gps.heading = 0;
update->gps.quality = 0;
if(home.RNE[0] == 0 && home.RNE[1] && home.RNE[2] == 0 && home.RNE[3] == 0)
{
update->gps.NED[0] = 0;
update->gps.NED[1] = 0;
update->gps.NED[2] = 0;
update->gps.groundspeed = 0;
update->gps.heading = 0;
update->gps.quality = 0;
}
else {
update->gps.groundspeed = data.Groundspeed;
update->gps.heading = data.Heading;
update->gps.quality = 0;
double LLA[3] = {(double) data.Latitude, (double) data.Longitude, (double) data.Altitude};
double ECEF[3] = {(double) home.ECEF[0], (double) home.ECEF[1], (double) home.ECEF[2]};
LLA2Base(LLA, ECEF, (float (*)[3]) home.RNE, update->gps.NED);
}
}
static void process_update(struct opahrs_msg_v1_rsp_update * update)

5
flight/OpenPilot/Modules/GPS/GPS.c
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@ -185,16 +185,13 @@ static void setHomeLocation(PositionActualData * gpsData)
// Compute home ECEF coordinates and the rotation matrix into NED
double LLA[3] = {(double) home.Latitude / 10e6, (double) home.Longitude / 10e6, (double) home.Altitude};
double ECEF[3];
float RNE[3][3];
RneFromLLA(LLA, RNE);
RneFromLLA(LLA, (float (*)[3]) home.RNE);
LLA2ECEF(LLA, ECEF);
// TODO: Currently UAVTalk only supports float but these conversions use double
// need to find out if they require that precision and if so extend UAVTAlk
home.ECEF[0] = ECEF[0];
home.ECEF[1] = ECEF[1];
home.ECEF[2] = ECEF[2];
// Can't figure out how to directly cast home.RNE (float *) to a float[3][3]
memcpy(&home.RNE[0], &RNE[0][0], 9 * sizeof(RNE[0][0]));
// Compute magnetic flux direction at home location
WMM_GetMagVector(LLA[0], LLA[1], LLA[2], 8, 17, 2010, &home.Be[0]);