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// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2
// + Copyright (c) 04.2007 Holger Buss
3
// + Nur für den privaten Gebrauch
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// + www.MikroKopter.com
5
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
6
// + Es gilt für das gesamte Projekt (Hardware, Software, Binärfiles, Sourcecode und Dokumentation),
7
// + dass eine Nutzung (auch auszugsweise) nur für den privaten (nicht-kommerziellen) Gebrauch zulässig ist.
8
// + Sollten direkte oder indirekte kommerzielle Absichten verfolgt werden, ist mit uns (info@mikrokopter.de) Kontakt
9
// + bzgl. der Nutzungsbedingungen aufzunehmen.
10
// + Eine kommerzielle Nutzung ist z.B.Verkauf von MikroKoptern, Bestückung und Verkauf von Platinen oder Bausätzen,
11
// + Verkauf von Luftbildaufnahmen, usw.
12
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
13
// + Werden Teile des Quellcodes (mit oder ohne Modifikation) weiterverwendet oder veröffentlicht,
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// + unterliegen sie auch diesen Nutzungsbedingungen und diese Nutzungsbedingungen incl. Copyright müssen dann beiliegen
15
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
16
// + Sollte die Software (auch auszugesweise) oder sonstige Informationen des MikroKopter-Projekts
17
// + auf anderen Webseiten oder sonstigen Medien veröffentlicht werden, muss unsere Webseite "http://www.mikrokopter.de"
18
// + eindeutig als Ursprung verlinkt werden
19
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
20
// + Keine Gewähr auf Fehlerfreiheit, Vollständigkeit oder Funktion
21
// + Benutzung auf eigene Gefahr
22
// + Wir übernehmen keinerlei Haftung für direkte oder indirekte Personen- oder Sachschäden
23
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
24
// + Die Portierung der Software (oder Teile davon) auf andere Systeme (ausser der Hardware von www.mikrokopter.de) ist nur
25
// + mit unserer Zustimmung zulässig
26
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
27
// + Die Funktion printf_P() unterliegt ihrer eigenen Lizenz und ist hiervon nicht betroffen
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// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
29
// + Redistributions of source code (with or without modifications) must retain the above copyright notice,
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// + this list of conditions and the following disclaimer.
31
// +   * Neither the name of the copyright holders nor the names of contributors may be used to endorse or promote products derived
32
// +     from this software without specific prior written permission.
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// +   * The use of this project (hardware, software, binary files, sources and documentation) is only permittet
34
// +     for non-commercial use (directly or indirectly)
35
// +     Commercial use (for excample: selling of MikroKopters, selling of PCBs, assembly, ...) is only permitted
36
// +     with our written permission
37
// +   * If sources or documentations are redistributet on other webpages, out webpage (http://www.MikroKopter.de) must be
38
// +     clearly linked as origin
39
// +   * porting to systems other than hardware from www.mikrokopter.de is not allowed
40
// +  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
41
// +  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42
// +  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
43
// +  ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
44
// +  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
45
// +  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
46
// +  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
47
// +  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN// +  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
48
// +  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
49
// +  POSSIBILITY OF SUCH DAMAGE.
50
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
51
 
52
#include <stdlib.h>
53
#include <avr/io.h>
54
#include "eeprom.h"
55
#include "flight.h"
56
 
57
// Only for debug. Remove.
58
#include "analog.h"
59
 
60
// Necessary for external control and motor test
61
#include "uart0.h"
62
#include "twimaster.h"
63
#include "attitude.h"
64
#include "controlMixer.h"
65
#ifdef USE_MK3MAG
66
#include "gps.h"
67
#endif
68
 
69
#define CHECK_MIN_MAX(value, min, max) {if(value < min) value = min; else if(value > max) value = max;}
70
 
71
// TODO: These are no longer maintained, just left at 0. The original implementation just summed the acc.
72
// value to them every 2 ms. No filtering or anything. Just a case for an eventual overflow?? Hey???
73
int16_t naviAccPitch = 0, naviAccRoll = 0, naviCntAcc = 0;
74
 
75
// MK flags
76
uint16_t isFlying = 0;
77
volatile uint8_t MKFlags = 0;
78
 
79
uint8_t gyroPFactor, gyroIFactor;       // the PD factors for the attitude control
80
uint8_t yawRatePFactor, yawRateIFactor; // the PD factors for the yaw control
81
 
82
// Some integral weight constant...
83
uint16_t Ki = 10300 / 33;
84
 
85
uint8_t RequiredMotors = 0;
86
 
87
// No support for altitude control right 
88
// int16_t SetPointHeight = 0;
89
 
90
/************************************************************************/
91
/*  Filter for motor value smoothing (necessary???)                     */
92
/************************************************************************/
93
int16_t motorFilter(int16_t newvalue, int16_t oldvalue) {
94
  switch(dynamicParams.UserParams[5]) {
95
  case 0:
96
    return newvalue;
97
  case 1:
98
    return (oldvalue + newvalue) / 2;  
99
  case 2:
100
    if(newvalue > oldvalue)
101
      return (1 * (int16_t)oldvalue + newvalue) / 2;  //mean of old and new
102
    else       
103
      return newvalue - (oldvalue - newvalue) * 1; // 2 * new - old
104
  case 3:
105
    if(newvalue < oldvalue)
106
      return (1 * (int16_t)oldvalue + newvalue) / 2;  //mean of old and new
107
    else       
108
      return newvalue - (oldvalue - newvalue) * 1; // 2 * new - old
109
  default: return newvalue;
110
  }
111
}
112
 
113
/************************************************************************/
114
/*  Neutral Readings                                                    */
115
/************************************************************************/
116
void flight_setNeutral() {
117
  // GPSStickPitch = 0;
118
  // GPSStickRoll = 0;
119
 
120
  MKFlags |= MKFLAG_CALIBRATE;
121
 
122
  // not really used here any more.
123
  dynamicParams.KalmanK = -1;
124
  dynamicParams.KalmanMaxDrift = 0;
125
  dynamicParams.KalmanMaxFusion = 32;
126
 
127
  controlMixer_initVariables();
128
 
129
  // TODO: Move off.
130
  // RC_Quality = 100;
131
}
132
 
133
/************************************************************************/
134
/*  Transmit Motor Data via I2C                                         */
135
/************************************************************************/
136
void sendMotorData(void) {
137
  uint8_t i;
138
  if(!(MKFlags & MKFLAG_MOTOR_RUN)) {
139
    // If pilot has not started the engines....
140
    MKFlags &= ~(MKFLAG_FLY | MKFLAG_START); // clear flag FLY and START if motors are off
141
    for(i = 0; i < MAX_MOTORS; i++) {
142
      // and if we are not in motor test mode, cut throttle on all motors.
143
      if(!motorTestActive) Motor[i].SetPoint = 0;
144
      else                 Motor[i].SetPoint = motorTest[i];
145
    }
146
    if(motorTestActive) motorTestActive--;
147
  }
148
 
149
  DebugOut.Analog[12] = Motor[0].SetPoint; // Front
150
  DebugOut.Analog[13] = Motor[1].SetPoint; // Rear
151
  DebugOut.Analog[14] = Motor[3].SetPoint; // Left
152
  DebugOut.Analog[15] = Motor[2].SetPoint; // Right
153
  // Start I2C Interrupt Mode
154
  I2C_Start(TWI_STATE_MOTOR_TX);
155
}
156
 
157
void setFlightParameters(uint8_t _Ki, uint8_t _gyroPFactor, uint8_t _gyroIFactor, uint8_t _yawPFactor, uint8_t _yawIFactor) {
158
  Ki = 10300 / _Ki;
159
  gyroPFactor = _gyroPFactor;
160
  gyroIFactor = _gyroIFactor;
161
  yawRatePFactor = _yawPFactor;
162
  yawRateIFactor = _yawIFactor;
163
}
164
 
165
void setNormalFlightParameters(void) {
166
  if(staticParams.GlobalConfig & CFG_HEADING_HOLD) gyroIFactor = 0;
167
  else gyroIFactor = dynamicParams.GyroI;
168
 
169
  setFlightParameters(dynamicParams.IFactor + 1,
170
                      dynamicParams.GyroP + 10,
171
                      staticParams.GlobalConfig & CFG_HEADING_HOLD ? dynamicParams.GyroI : 0,
172
                      dynamicParams.GyroP + 10,
173
                      dynamicParams.UserParams[6]
174
                      );
175
}
176
 
177
void setStableFlightParameters(void) {
178
  setFlightParameters(33, 90, 120, 90, 120);
179
}
180
 
181
void handleCommands(uint8_t command, uint8_t isCommandRepeated) {
182
    if(!(MKFlags & MKFLAG_MOTOR_RUN)) {
183
      if (command == COMMAND_GYROCAL && !isCommandRepeated) {
184
        // Run gyro calibration but do not repeat it.
185
        GRN_OFF;
186
 
187
        // TODO: out of here. Anyway, MKFLAG_MOTOR_RUN is cleared. Not enough?
188
        // isFlying = 0;
189
        // check roll/pitch stick position
190
        // if pitch stick is top or roll stick is left or right --> change parameter setting
191
        // according to roll/pitch stick position
192
 
193
        uint8_t setting = controlMixer_getArgument();
194
 
195
        if ((setting > 0 && setting < 6) || setting == 9) {
196
          // Gyro calinbration, with or without selecting a new parameter-set.
197
          if(setting > 0 && setting < 6) {
198
            // A valid parameter-set (1..5) was chosen - use it.
199
            setActiveParamSet(setting);
200
          }
201
          ParamSet_ReadFromEEProm(getActiveParamSet());
202
          attitude_setNeutral();
203
          flight_setNeutral();
204
          // Right stick is centered; calibrate it to zero (hmm strictly does not belong here).
205
          controlMixer_setNeutral(setting == 9); // Calibrate right stick neutral position.
206
          beepNumber(getActiveParamSet());
207
        } else if(staticParams.GlobalConfig & (CFG_COMPASS_ACTIVE | CFG_GPS_ACTIVE) && setting == 7) {
208
          // If right stick is centered and down
209
          compassCalState = 1;
210
          beep(1000);
211
        }
212
      }
213
 
214
      // save the ACC neutral setting to eeprom
215
      else  {
216
        if(command == COMMAND_ACCCAL && !isCommandRepeated) {
217
          // Run gyro and acc. meter calibration but do not repeat it.
218
          GRN_OFF;
219
          analog_calibrateAcc();
220
          attitude_setNeutral();
221
          flight_setNeutral();
222
          controlMixer_setNeutral(1); // Calibrate right stick neutral position.
223
          beepNumber(getActiveParamSet());
224
        }
225
      }
226
    } // end !MOTOR_RUN condition.
227
    if (command == COMMAND_START) {
228
      isFlying = 1; // TODO: Really????
229
      // if (!controlMixer_isCommandRepeated()) {
230
      // attitude_startDynamicCalibration(); // Try sense the effect of the motors on sensors.
231
      MKFlags |= (MKFLAG_MOTOR_RUN | MKFLAG_START); // set flag RUN and START. TODO: Is that START flag used at all???
232
      // } else { // Pilot is holding stick, ever after motor start. Continue to sense the effect of the motors on sensors.
233
      // attitude_continueDynamicCalibration();
234
      // setPointYaw = 0;
235
      // IPartPitch = 0;
236
      // IPartRoll = 0;
237
      // }
238
    } else if (command == COMMAND_STOP) {
239
      isFlying = 0;
240
      MKFlags &= ~(MKFLAG_MOTOR_RUN);
241
    }
242
}
243
 
244
/************************************************************************/
245
/*  Main Flight Control                                                 */
246
/************************************************************************/
247
void flight_control(void) {
248
  int16_t tmp_int;
249
    // Mixer Fractions that are combined for Motor Control
250
  int16_t yawTerm, throttleTerm, pitchTerm, rollTerm;
251
 
252
  // PID controller variables
253
  int16_t PDPartPitch, PDPartRoll, PDPartYaw, PPartPitch, PPartRoll;
254
  static int32_t IPartPitch = 0, IPartRoll = 0;
255
 
256
  static int32_t setPointYaw = 0;
257
 
258
  // Removed. Too complicated, and apparently not necessary with MEMS gyros anyway.
259
  // static int32_t IntegralGyroPitchError = 0, IntegralGyroRollError = 0;
260
  // static int32_t CorrectionPitch, CorrectionRoll;
261
 
262
  static uint16_t emergencyFlightTime;
263
 
264
  // No support for altitude control right now.
265
  // static uint8_t HeightControlActive = 0;
266
  // static int16_t HeightControlGas = 0;
267
 
268
  static int8_t debugDataTimer = 0;
269
 
270
  // High resolution motor values for smoothing of PID motor outputs
271
  static int16_t motorFilters[MAX_MOTORS];
272
 
273
  uint8_t i;
274
 
275
  // Fire the main flight attitude calculation, including integration of angles.
276
  calculateFlightAttitude();
277
  GRN_ON;
278
 
279
  /*
280
   * TODO: update should: Set the stick variables if good signal, set them to zero if bad.
281
   * Set variables also.
282
   */
283
  controlMixer_update();
284
 
285
  throttleTerm = controlThrottle;
286
  if(throttleTerm < staticParams.GasMin + 10) throttleTerm = staticParams.GasMin + 10;
287
 
288
  // +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
289
  // RC-signal is bad
290
  // +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
291
  if(controlMixer_getSignalQuality() <= SIGNAL_BAD) {           // the rc-frame signal is not reveived or noisy
292
    RED_ON;
293
    beepRCAlarm();
294
 
295
    if(emergencyFlightTime) {
296
      // continue emergency flight
297
      emergencyFlightTime--;
298
      if(isFlying > 1000) {                    
299
        // We're probably still flying. Descend slowly.
300
        throttleTerm = staticParams.EmergencyGas;  // Set emergency throttle
301
        MKFlags |= (MKFLAG_EMERGENCY_LANDING);     // Set flag for emergency landing
302
        setStableFlightParameters();
303
      } else {
304
        MKFlags &= ~(MKFLAG_MOTOR_RUN);            // Probably not flying, and bad R/C signal. Kill motors.
305
      }
306
    } else {
307
      // end emergency flight (just cut the motors???)
308
      MKFlags &= ~(MKFLAG_MOTOR_RUN | MKFLAG_EMERGENCY_LANDING);
309
    }
310
  } else {
311
    // signal is acceptable
312
    if(controlMixer_getSignalQuality() > SIGNAL_BAD) {
313
      // Reset emergency landing control variables.
314
      MKFlags &= ~(MKFLAG_EMERGENCY_LANDING);  // clear flag for emergency landing
315
      // The time is in whole seconds.
316
      emergencyFlightTime = staticParams.EmergencyGasDuration * 488;
317
    }
318
 
319
    // If some throttle is given, and the motor-run flag is on, increase the probability that we are flying.
320
    if(throttleTerm > 40 && (MKFlags & MKFLAG_MOTOR_RUN)) {
321
      // increment flight-time counter until overflow.
322
      if(isFlying != 0xFFFF) isFlying++;
323
    } else
324
      /*
325
       * When standing on the ground, do not apply I controls and zero the yaw stick.
326
       * Probably to avoid integration effects that will cause the copter to spin
327
       * or flip when taking off.
328
       * TODO: What was the value of IPartPitch? At 1st run of this, it's 0 already.
329
       */
330
      if(isFlying < 256) {
331
        IPartPitch = 0;
332
        IPartRoll = 0;
333
        // TODO: Don't stomp on other modules' variables!!!
334
        controlYaw = 0;
335
        if(isFlying == 250) {
336
          updateCompassCourse = 1;
337
          yawAngle = 0;
338
          setPointYaw = 0;
339
        }
340
      } else {
341
        // DebugOut.Digital[1] = 0;
342
        // Set fly flag. TODO: Hmmm what can we trust - the isFlying counter or the flag? 
343
        // Answer: The counter. The flag is not read from anywhere anyway... except the NC maybe.
344
        MKFlags |= (MKFLAG_FLY);
345
      }
346
 
347
    /*
348
     * Get the current command (start/stop motors, calibrate), if any.
349
     */
350
    handleCommands(controlMixer_getCommand(), controlMixer_isCommandRepeated());
351
 
352
    // if(controlMixer_getSignalQuality() >= SIGNAL_GOOD) {
353
    setNormalFlightParameters();
354
    // }
355
  }
356
 
357
  // +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
358
  // in case of emergency landing
359
  // +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
360
  // set all inputs to save values
361
  /*
362
   * Looping the H&I way basically is just a matter of turning off attitude angle measurement
363
   * by integration (because 300 deg/s gyros are too slow) and turning down the throttle.
364
   * This is the latter.
365
   */
366
  if(looping) {
367
    if(throttleTerm > staticParams.LoopGasLimit) throttleTerm = staticParams.LoopGasLimit;
368
  }
369
 
370
  /*
371
   * Here is a dynamic calibration experiment: Adjust integrals and gyro offsets if the pilot appears to be always
372
   * pushing of pulling on the pitch or roll stick.
373
   */
374
  /*
375
    if(ADCycleCount >= dynamicParams.UserParam2 * 10) {
376
    // This algo works OK on the desk but it is a little sluggish and it oscillates.
377
    // It does not very effectively cancel drift because of dynamics.
378
 
379
    minStickForAutoCal = dynamicParams.UserParam3 * 10;
380
    maxStickForAutoCal = dynamicParams.UserParam4 * 10;
381
 
382
    // If not already corrected to the limit, and dynamic calibration is enabled:
383
    if (abs(dynamicOffsetPitch - savedDynamicOffsetPitch) < dynamicParams.UserParam1 && !dynamicParams.UserParam6) {
384
    // The pilot pushes on the stick, the integral is > 0, and the gyro val is > 0. Looks like a value-too-high case, so increase the offset.
385
    if (filteredHiResPitchGyro > dynamicOffsetPitch && pitchAngle > 0 && maxStickPitch >= minStickForAutoCal && maxStickPitch <= maxStickForAutoCal) {
386
    dynamicOffsetPitch += (int8_t)(dynamicParams.UserParam7 - 128); // (adding something seems right...)
387
    pitchAngle = (pitchAngle * (int32_t)dynamicParams.UserParam5) / 100L;
388
    } else if (filteredHiResPitchGyro < dynamicOffsetPitch && pitchAngle < 0 && maxStickPitch <= -minStickForAutoCal && maxStickPitch >= -maxStickForAutoCal) {
389
    dynamicOffsetPitch -= (int8_t)(dynamicParams.UserParam7 - 128); // (subtracting something seems right...)
390
    pitchAngle = (pitchAngle * (int32_t)dynamicParams.UserParam5) / 100L;
391
    }
392
    }
393
 
394
    // If not already corrected to the limit, and dynamic calibration is enabled:
395
    if (abs(dynamicOffsetRoll - savedDynamicOffsetRoll) <= dynamicParams.UserParam1 && !dynamicParams.UserParam6) {
396
    if (filteredHiResRollGyro > dynamicOffsetRoll && rollAngle > 0 && maxStickRoll >= minStickForAutoCal && maxStickRoll <= maxStickForAutoCal) {
397
    dynamicOffsetRoll += (int8_t)(dynamicParams.UserParam8 - 128);
398
    rollAngle = (rollAngle * (int32_t)dynamicParams.UserParam5) / 100L;
399
    } else if (filteredHiResRollGyro < dynamicOffsetRoll && rollAngle < 0 && maxStickRoll <= -minStickForAutoCal && maxStickRoll >= -maxStickForAutoCal) {
400
    dynamicOffsetRoll -= (int8_t)(dynamicParams.UserParam8 - 128);
401
    rollAngle = (rollAngle * (int32_t)dynamicParams.UserParam5) / 100L;
402
    }
403
    }
404
    ADCycleCount = 0;
405
    }
406
  */
407
 
408
  // +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
409
  //  Yawing
410
  // +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
411
  if(abs(controlYaw) > 4 * staticParams.StickYawP) { // yaw stick is activated
412
    badCompassHeading = 1000;
413
    if(!(staticParams.GlobalConfig & CFG_COMPASS_FIX)) {
414
      updateCompassCourse = 1;
415
    }
416
  }
417
 
418
  setPointYaw = controlYaw;
419
 
420
  // trimm drift of ReadingIntegralGyroYaw with SetPointYaw(StickYaw)
421
  // TODO: We want NO feedback of control related stuff to the attitude related stuff.
422
  yawAngle -= tmp_int;
423
 
424
  // limit the effect
425
  CHECK_MIN_MAX(yawAngle, -50000, 50000)
426
 
427
    // +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
428
    //  Compass
429
    // +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
430
    // compass code is used if Compass option is selected
431
 
432
    /*
433
    if(staticParams.GlobalConfig & (CFG_COMPASS_ACTIVE|CFG_GPS_ACTIVE)) {
434
      updateCompass();
435
    }
436
    */
437
 
438
#if defined (USE_MK3MAG)
439
  // +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
440
  //  GPS
441
  // +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
442
  if(staticParams.GlobalConfig & CFG_GPS_ACTIVE) {
443
    GPS_Main();
444
    MKFlags &= ~(MKFLAG_CALIBRATE | MKFLAG_START);
445
  }
446
  else {
447
    // GPSStickPitch = 0;
448
    // GPSStickRoll = 0;
449
  }
450
#endif
451
 
452
  // +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
453
  //  calculate control feedback from angle (gyro integral) and agular velocity (gyro signal)
454
  // +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
455
  // The P-part is actually the I-part...
456
  if(looping & LOOPING_PITCH_AXIS) {
457
    PPartPitch = 0;
458
  } else {
459
    // TODO: Where do the 44000 come from???
460
    PPartPitch = (pitchAngle * gyroIFactor) / (44000 / STICK_GAIN); // P-Part - Proportional to Integral
461
    // PPartPitch = IntegralNickMalFaktor in H&I code.
462
  }
463
 
464
  // Now blend in the P-part - proportional to the Differential of the integral = the gyro value.
465
  PDPartPitch = PPartPitch + (int32_t)((int32_t)pitchRate_PID * gyroPFactor) / (256L / STICK_GAIN)
466
    + (pitchDifferential * dynamicParams.GyroD) / 16;
467
  // = MesswertNick in H&I code
468
 
469
  // The P-part is actually the I-part...
470
  if(looping & LOOPING_ROLL_AXIS) {
471
    PPartRoll = 0;
472
  } else {
473
    PPartRoll = (rollAngle * gyroIFactor) / (44000 / STICK_GAIN); // P-Part - Proportional to Integral
474
  }
475
 
476
  // Now blend in the P-part - proportional to the Differential of the integral = the gyro value.
477
  PDPartRoll = PPartRoll + (int32_t)((int32_t)rollRate_PID * gyroPFactor) / (256L / STICK_GAIN)
478
    + (rollDifferential * dynamicParams.GyroD) / 16;
479
 
480
  PDPartYaw =  (int32_t)(yawRate * 2 * (int32_t)yawRatePFactor) / (256L / STICK_GAIN) + (int32_t)(yawAngle * yawRateIFactor) / (2 * (44000 / STICK_GAIN));
481
 
482
  // limit control feedback
483
#define SENSOR_LIMIT  (4096 * 4)
484
  CHECK_MIN_MAX(PDPartPitch, -SENSOR_LIMIT, SENSOR_LIMIT);
485
  CHECK_MIN_MAX(PDPartRoll, -SENSOR_LIMIT, SENSOR_LIMIT);
486
  CHECK_MIN_MAX(PDPartYaw,  -SENSOR_LIMIT, SENSOR_LIMIT);
487
 
488
  /*
489
   * Compose throttle term.
490
   * If a Bl-Ctrl is missing, prevent takeoff.
491
   */
492
  if(missingMotor) {
493
    // if we are in the lift off condition. Hmmmmmm when is throttleTerm == 0 anyway???
494
    if((isFlying > 1) && (isFlying < 50) && (throttleTerm > 0))
495
      isFlying = 1; // keep within lift off condition
496
    throttleTerm = staticParams.GasMin; // reduce gas to min to avoid lift of
497
  }
498
 
499
  /*
500
   * Height control was here.
501
   */
502
 
503
  if(throttleTerm > staticParams.GasMax - 20) throttleTerm = (staticParams.GasMax - 20);
504
  throttleTerm *= STICK_GAIN;
505
 
506
  /*
507
   * Compose yaw term.
508
   */
509
#define MIN_YAWGAS (40 * STICK_GAIN)  // yaw also below this gas value
510
  yawTerm = PDPartYaw - setPointYaw * STICK_GAIN;     // yaw controller
511
  // limit yawTerm
512
  if(throttleTerm > MIN_YAWGAS) {
513
    CHECK_MIN_MAX(yawTerm, - (throttleTerm / 2), (throttleTerm / 2));
514
  } else {
515
    CHECK_MIN_MAX(yawTerm, - (MIN_YAWGAS / 2), (MIN_YAWGAS / 2));
516
  }
517
 
518
  tmp_int = staticParams.GasMax * STICK_GAIN;
519
  CHECK_MIN_MAX(yawTerm, -(tmp_int - throttleTerm), (tmp_int - throttleTerm));
520
 
521
  /*
522
   * Compose pitch and roll terms. This is finally where the sticks come into play.
523
   */
524
  if(gyroIFactor) {
525
    // Integration mode: Integrate (angle - stick) = the difference between angle and stick pos.
526
    // That means: Holding the stick a little forward will, at constant flight attitude, cause this to grow (decline??) over time.
527
    // TODO: Find out why this seems to be proportional to stick position - not integrating it at all.
528
    IPartPitch += PPartPitch - controlPitch; // Integrate difference between P part (the angle) and the stick pos.
529
    IPartRoll += PPartRoll - controlRoll;    // I-part for attitude control OK
530
  } else {
531
    // "HH" mode: Integrate (rate - stick) = the difference between rotation rate and stick pos.
532
    IPartPitch += PDPartPitch - controlPitch; // With gyroIFactor == 0, PDPart is really just a D-part. Integrate D-part (the rot. rate) and the stick pos.
533
    IPartRoll += PDPartRoll - controlRoll;    // With gyroIFactor == 0, PDPart is really just a D-part. Integrate D-part (the rot. rate) and the stick pos.
534
  }
535
 
536
  // TODO: From which planet comes the 16000?
537
  CHECK_MIN_MAX(IPartPitch, -(STICK_GAIN * 16000L), (STICK_GAIN * 16000L));
538
 
539
  // Add (P, D) parts minus stick pos. to the scaled-down I part.
540
  pitchTerm = PDPartPitch - controlPitch + IPartPitch / Ki;    // PID-controller for pitch
541
 
542
  CHECK_MIN_MAX(IPartRoll, -(STICK_GAIN * 16000L), (STICK_GAIN * 16000L));
543
  rollTerm = PDPartRoll - controlRoll + IPartRoll / Ki;  // PID-controller for roll
544
 
545
  /*
546
   * Apply "dynamic stability" - that is: Limit pitch and roll terms to a growing function of throttle and yaw(!).
547
   * The higher the dynamic stability parameter, the wider the bounds. 64 seems to be a kind of unity
548
   * (max. pitch or roll term is the throttle value).
549
   * TODO: Why a growing function of yaw?
550
   */
551
  tmp_int = (int32_t)((int32_t)dynamicParams.DynamicStability * (int32_t)(throttleTerm + abs(yawTerm) / 2)) / 64;
552
  CHECK_MIN_MAX(pitchTerm, -tmp_int, tmp_int);
553
  CHECK_MIN_MAX(rollTerm, -tmp_int, tmp_int);
554
 
555
  // +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
556
  // Universal Mixer
557
  // +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
558
  for(i = 0; i < MAX_MOTORS; i++) {
559
    int16_t tmp;
560
    if(Mixer.Motor[i][MIX_THROTTLE] > 0) { // If a motor has a zero throttle mix, it is not considered.
561
      tmp =  ((int32_t)throttleTerm * Mixer.Motor[i][MIX_THROTTLE]) / 64L;
562
      tmp += ((int32_t)pitchTerm    * Mixer.Motor[i][MIX_PITCH])    / 64L;
563
      tmp += ((int32_t)rollTerm     * Mixer.Motor[i][MIX_ROLL])     / 64L;
564
      tmp += ((int32_t)yawTerm      * Mixer.Motor[i][MIX_YAW])      / 64L;
565
      motorFilters[i] = motorFilter(tmp, motorFilters[i]);
566
      tmp = motorFilters[i] / STICK_GAIN;
567
      CHECK_MIN_MAX(tmp, staticParams.GasMin, staticParams.GasMax);
568
      Motor[i].SetPoint = tmp;
569
    }
570
    else Motor[i].SetPoint = 0;
571
  }
572
 
573
  // +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
574
  //  Debugwerte zuordnen
575
  // +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
576
  if(!debugDataTimer--) {
577
    debugDataTimer = 24; // update debug outputs every 25*2ms = 50 ms (20Hz)
578
    DebugOut.Analog[0]  = (10 * pitchAngle) / GYRO_DEG_FACTOR_PITCHROLL; // in 0.1 deg
579
    DebugOut.Analog[1]  = (10 * rollAngle) / GYRO_DEG_FACTOR_PITCHROLL; // in 0.1 deg
580
    DebugOut.Analog[2]  = yawGyroHeading / GYRO_DEG_FACTOR_YAW;
581
 
582
    /*
583
    DebugOut.Analog[9]  = UBat;
584
    DebugOut.Analog[10] = RC_Quality;
585
    DebugOut.Analog[11] = yawGyroHeading / GYRO_DEG_FACTOR_YAW;
586
    */
587
 
588
    // 12..15 are the 4 first motors.
589
 
590
    DebugOut.Analog[16] = pitchAxisAcc;
591
    DebugOut.Analog[17] = rollAxisAcc;
592
    //    DebugOut.Analog[18] = ZAxisAcc;
593
    DebugOut.Analog[19] = throttleTerm;
594
    DebugOut.Analog[20] = pitchTerm;
595
    DebugOut.Analog[21] = rollTerm;
596
    DebugOut.Analog[22] = yawTerm;
597
    DebugOut.Analog[23] = PPartPitch;     //
598
    DebugOut.Analog[24] = IPartPitch /Ki; // meget meget lille.
599
    DebugOut.Analog[25] = PDPartPitch;    // omtrent lig ppart.
600
 
601
    DebugOut.Analog[26] = pitchAccNoisePeak;
602
    DebugOut.Analog[27] = rollAccNoisePeak;
603
 
604
    DebugOut.Analog[30] = pitchGyroNoisePeak;
605
    DebugOut.Analog[31] = rollGyroNoisePeak;
606
  }
607
}