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1595 Commits

Author SHA1 Message Date
Andrew Tridgell
769011e947 AnalogSource: added some example code 2012-07-01 15:01:05 +10:00
Andrew Tridgell
1fdcc3e8f0 SITL: added support for new analog source 
removed analogRead() to prevent people using it
 2012-07-01 15:01:05 +10:00
Andrew Tridgell
c8befe4536 AnalogSource: make the Arduino AnalogSource interrupt driven 
this fixes several problems with reading analog sources:

 - we were getting poor values because we didn't wait long enough for
   an analog source to settle

 - we wasted a lot of CPU cycles waiting for conversions

 - we were not taking averages over many samples, which we did with
   the old AP_ADC driver on the APM1
 2012-07-01 15:01:05 +10:00
Andrew Tridgell
136c03c3c0 AHRS: include the P terms in get_gyro() 
this makes it more useful for navigation controllers
 2012-06-29 21:54:09 +10:00
Andrew Tridgell
acc6adf6e9 MPU6k: removed an unused variable 2012-06-29 21:54:09 +10:00
Andrew Tridgell
ed691fc465 SITL: added SITL class for controlling simulation 
this holds mavlink settable parameters for controlling sensor noise
levels
 2012-06-29 15:10:51 +10:00
Andrew Tridgell
16c55c64d4 AHRS: don't add the P terms in _omega 
this can lead feedback via the _P_gain()
 2012-06-29 15:10:51 +10:00
Andrew Tridgell
37fc6c46b9 AHRS: disable barometer for vertical acceleration 
this seems to have been the cause of the 'flips' seen by Marco and
others. Testing by Craig and Alan shows that the flips are gone when
the barometric acceleration is removed.

It looks like a 5 point average filter is not enough to keep the
vertical acceleteration noise low. With high noise in the z axes, the
x and y axes are scaled back when the ge vector is normalised.
 2012-06-28 11:12:49 +10:00
Andrew Tridgell
58c4d458dc AHRS: re-instate new DCM drift correction code 
This reverts commit 078489638d47fbaffde7c51249e36b5a8fc4ef9d.
 2012-06-28 11:09:22 +10:00
Andrew Tridgell
fd241692d0 AHRS: revert to the old drift correction algorithm 
we need to work out why Craigs quad flipped today before we enable
this new drift correction
 2012-06-27 18:16:41 +10:00
Andrew Tridgell
a6543f1e84 SITL: removed an unused variable 2012-06-27 16:01:50 +10:00
Andrew Tridgell
5bccfbd94c Barometer: fixed airstart for APM 
we need to re-load the ground pressure and temperature from eeprom on
and airstart
 2012-06-27 16:01:50 +10:00
Andrew Tridgell
8e044a560b AHRS: include P term in omega 
thanks to Jon for suggesting this
 2012-06-27 16:01:50 +10:00
Andrew Tridgell
37e2f2ee2c AHRS: implement spin rate limits 
this follows the method that Bill developed in his fastRotations
paper. We've demonstrated that this is indeed needed in APM, as we
were able to produce the 'dizzy' effects in both the ArduPlane and
ArduCopter simulator
 2012-06-27 16:01:50 +10:00
Andrew Tridgell
e4a245179c AHRS: cope with copters with no compass 
if a copter doesn't have a compass, we can't use the GPS for gyro
drift correction
 2012-06-27 16:01:50 +10:00
Andrew Tridgell
f4faf941e2 GPS: test the more modern MTK16 2012-06-27 16:01:50 +10:00
Andrew Tridgell
27761737ce SITL: fixed GPS heading in simulated UBlox 
longitude scale does not apply to velocity->heading conversions
 2012-06-27 16:01:50 +10:00
Andrew Tridgell
b811653800 SITL: changes UBlox simulation to 5Hz 
this matches the real UBlox driver
 2012-06-27 16:01:50 +10:00
Andrew Tridgell
e4d28b12e5 Compass: remove the need to call calculate() on the compass object 
the new AHRS code doesn't use calculate() and the compass.heading
attribute. Instead it works on the raw magnetometer vector. This
change removes the internal calculate state from the compass object
and instead adds calculate_heading() for use by older code that
doesn't go via AHRS.

This significantly reduces the calculation involved in compass updates

The null offsets enable/disable code is also removed, as it is not
needed now that compass offsets are not linked to the AHRS state.
 2012-06-27 16:01:50 +10:00
Andrew Tridgell
3a41ad8e7c AHRS: normalize the ge vector in drift correction, and use barometer 
The normalisation ensures the error term scales uniformly with
different accelerations.

The barometer is used for vertical acceleration estimation
 2012-06-27 16:01:50 +10:00
Andrew Tridgell
c387edd74c Baro: added get_altitude() and get_climb_rate() interfaces 
this allows the barometer driver to calibrate and return altitude and
climb rate values. This will be used by the AHRS drift correction code
for vertical velocity

The climb rate uses a 5 point average filter
 2012-06-27 16:01:50 +10:00
Andrew Tridgell
06c8763881 Filter: added 5 point average float filter 2012-06-27 16:01:50 +10:00
Jonathan Challinger
d230690b7b AHRS: brought DCM more inline with Bill's implementation 
omega_I applied continuously. _ki larger. Stop integrating when _omega.length()>20

The key change was the scaling of ge to ensure the error is not
quadratic
 2012-06-27 16:01:49 +10:00
Andrew Tridgell
d4c8041c51 AHRS: first successful version of Bills new drift correction system 
This makes 3 major changes:

 1) fixes the scaling of the yaw drift correction term to fix the time
 constant

 2) don't integrate the mag vector over multiple readings

 3) accumulate omega_I changes over 15 seconds before applying, to try
 to prevent omega_I picking up short term responses
 2012-06-27 16:01:49 +10:00
Andrew Tridgell
4d08f75292 AHRS: update for new _fly_forward flag 2012-06-27 16:01:49 +10:00
Andrew Tridgell
0f5c22bd8e AHRS: implement Bills new drift correction algorithm 
this is an initial implementation of this paper:

  http://gentlenav.googlecode.com/files/RollPitchDriftCompensation.pdf
 2012-06-27 16:01:49 +10:00
Andrew Tridgell
52d77407d4 AHRS: added GPS support to AHRS test 2012-06-27 16:01:49 +10:00
Andrew Tridgell
37db5247cd GPS: added velocity and acceleration components 
used by AHRS for acceleration correction
 2012-06-27 16:01:49 +10:00
Andrew Tridgell
fe865bc1dc Math: added comment 2012-06-27 16:01:49 +10:00
Andrew Tridgell
c30b0d85a3 Math: moved more template functions to the .cpp files 
save a bit more code space for larger functions
 2012-06-27 16:01:49 +10:00
rmackay9
068fe64b9b ArduCopter HIL: changed calls to setHIL to send in time as a uint32_t (it was a float) 2012-06-26 22:50:17 +09:00
Jason Short
7b9583453b Added a crude Lead Filter. Needs some fine tuning, lag specification, scaling. Works great on 4hz GPS such as Mtek. 2012-06-21 11:14:20 -07:00
Amilcar Lucas
78ccb9d37f Add linebreaks to increase readability. 2012-06-21 00:36:10 +02:00
Amilcar Lucas
b072a59843 Improve parameters descriptive text 2012-06-21 00:20:37 +02:00
Amilcar Lucas
594cedd324 Documentation improvements, no functional changes (only comments) 2012-06-17 22:53:54 +02:00
Amilcar Lucas
f4e9587aca Move local temp variables to the stack it saves 1952 bytes 
Add function comments
Only use _ on class member variables
Only point to a 3D GPS point if GPS has a fix
Implement MAV_MOUNT_MODE_MAVLINK_TARGETING
 2012-06-17 22:25:51 +02:00
Wingspinner
d09ac5899b Added support for channel curves (and expo) to AP_RC_Channel class. Also updated AP_RC_Channel example/test to demonstrate and test new functionality 2012-06-15 08:40:14 +00:00
Wingspinner
b699c77323 Added support for channel curves (and expo) to AP_RC_Channel class. Also updated AP_RC_Channel example/test to demonstrate and test new functionality 2012-06-15 08:38:52 +00:00
Andrew Tridgell
a851c53de4 GPS: need pgmspace.h for _write_progstr_block() 2012-06-15 16:27:11 +10:00
Andrew Tridgell
70f18289c5 GPS: fixed auto-config of UBlox setup with no UBX messages 
if a UBlox is configured for NMEA only, with no UBX messages at all
then it would never trigger the GPS_AUTO detection. This adds a UBX
config message to the init strings that enables the NAV_SOL message
 2012-06-15 15:53:27 +10:00
Andrew Tridgell
1fe297ab63 FastSerial: added tx_pending() method 
this allows the caller to wait for the tx buffer to drain
 2012-06-15 15:53:27 +10:00
Amilcar Lucas
1906e06b69 Added camera trigger functionality 2012-06-13 21:00:20 +02:00
Amilcar Lucas
a32b7c200b Add "3 axis camera stabilization" and "point camera to 3D point" functionality 
Patch by Gregory Fletcher and reviewed by me
 2012-06-13 20:55:19 +02:00
Amilcar Lucas
5ffd489d87 Spellcheck 2012-06-13 20:44:35 +02:00
rmackay9
1e38b0d535 AP_GPS_NMEA: fix from Roberto Navoni to improve NMEA accuracy 2012-06-12 20:27:50 +09:00
Andrew Tridgell
f9560ef093 GPS: use the new nav_setting in a couple of the sample sketches 2012-06-10 16:35:13 +10:00
Andrew Tridgell
33a2ad7e07 GPS: add stub settings for nav_setting in the other GPS drivers 
only Ublox supports nav_setting so far
 2012-06-10 16:34:53 +10:00
Andrew Tridgell
514be604a5 GPS: added auto-configuration of UBlox GPS 
the Ublox will now auto-configure for 5Hz with just the messages we
want. It also supports setting the navigation engine type
 2012-06-10 16:34:13 +10:00
Andrew Tridgell
9c1ce9e1c5 FastSerial: avoid buffer re-allocation on re-open if possible 
we commonly re-open serial ports a lot in the AUTO GPS driver
 2012-06-09 07:43:22 +10:00
Andrew Tridgell
cf4e56457b SITL: map() is a C++ function, so needs to be in C++ part of the header 
this fixes the ACM build
 2012-06-08 17:09:23 +10:00