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AP_NavEKF: Apply single definition of using optical flow

This commit is contained in:
priseborough 2014-11-16 07:01:50 +11:00 committed by Andrew Tridgell
parent b56b68ce10
commit 416eaf4633
1 changed files with 12 additions and 8 deletions
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20
libraries/AP_NavEKF/AP_NavEKF.cpp
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@ -933,7 +933,7 @@ void NavEKF::SelectMagFusion()
void NavEKF::SelectFlowFusion()
{
// if we don't have flow measurements and are not using GPS, dead reckon using current velocity vector unless we are in static mode
if (imuSampleTime_ms - flowMeaTime_ms > 200 && !staticMode && gpsInhibitMode == 2) {
if (!useOptFlow() && !staticMode && gpsInhibitMode == 2) {
velHoldMode = true;
} else {
velHoldMode = false;
@ -969,14 +969,14 @@ void NavEKF::SelectFlowFusion()
// update the time stamp
prevFlowFusionTime_ms = imuSampleTime_ms;
} else if (flow_state.obsIndex == 1 && !delayFusion && !staticMode){
} else if (useOptFlow() && flow_state.obsIndex == 1 && !delayFusion && !staticMode){
// Fuse the optical flow Y axis data into the main filter
FuseOptFlow();
// increment the index to fuse the X and Y data using the 2-state EKF on the next prediction cycle
flow_state.obsIndex = 2;
// indicate that flow fusion has been performed. This is used for load spreading.
flowFusePerformed = true;
} else if ((flow_state.obsIndex == 2 || newDataRng) && !staticMode) {
} else if (((useOptFlow() && flow_state.obsIndex == 2) || newDataRng) && !staticMode) {
// enable fusion of range data if available and permitted
if(newDataRng && useRngFinder()) {
fuseRngData = true;
@ -3613,7 +3613,7 @@ uint8_t NavEKF::setInhibitGPS(void)
}
// If we have received flow sensor data in the last second then indicate that we can do relative position
// otherwise indicate we can provide attitude and height only
if ((imuSampleTime_ms - flowMeaTime_ms) < 1000) {
if (useOptFlow()) {
gpsInhibitMode = 2;
return 2;
} else {
@ -3626,7 +3626,7 @@ uint8_t NavEKF::setInhibitGPS(void)
// allow 1.0 rad/sec margin for angular motion
float NavEKF::getSpeedLimit(void) const
{
if (useOptFlow()) {
if (useOptFlow() || gpsInhibitMode == 2) {
return max((_maxFlowRate - 1.0f), 0.0f) * (flowStates[1] - state.position[2]);
} else {
return 400.0f; //return 80% of max filter speed
@ -4388,8 +4388,12 @@ bool NavEKF::useRngFinder(void) const
// return true if we should use the optical flow sensor
bool NavEKF::useOptFlow(void) const
{
// TO-DO add code to set this based in setting of optical flow use parameter and presence of sensor
return true;
// only use sensor if data is fresh
if (imuSampleTime_ms - flowMeaTime_ms < 200) {
return true;
} else {
return false;
}
}
// return true if the vehicle code has requested use of static mode
@ -4493,7 +4497,7 @@ void NavEKF::getFilterStatus(uint8_t &status) const
status = (!state.quat.is_nan()<<0 |
!(velTimeout && posTimeout)<<1 |
!((velTimeout && hgtTimeout) || (hgtTimeout && _fusionModeGPS > 0))<<2 |
(gpsInhibitMode == 2 && (imuSampleTime_ms - flowMeaTime_ms) < 1000)<<3 |
(gpsInhibitMode == 2 && useOptFlow())<<3 |
!posTimeout<<4 |
!hgtTimeout<<5 |
!inhibitGndState<<6);