Subversion Repositories MK3Mag

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5 hbuss 1
/*#######################################################################################
7 hbuss 2
MK3Mag 3D-Magnet sensor
32 holgerb 3
!!! THIS IS NOT FREE SOFTWARE !!!
5 hbuss 4
#######################################################################################*/
5
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
7 hbuss 6
// + Copyright (c) 05.2008 Holger Buss
8 hbuss 7
// + Thanks to Ilja Fähnrich (P_Latzhalter)
62 ingob 8
// + Nur für den privaten Gebrauch / NON-COMMERCIAL USE ONLY
5 hbuss 9
// + www.MikroKopter.com
10
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
62 ingob 11
// + Die Portierung oder Nutzung der Software (oder Teile davon) auf andere Systeme (ausser der Hardware von www.mikrokopter.de) ist nur
12 hbuss 12
// + mit unserer Zustimmung zulässig
13
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
32 holgerb 14
// + Es gilt für das gesamte Projekt (Hardware, Software, Binärfiles, Sourcecode und Dokumentation),
15
// + dass eine Nutzung (auch auszugsweise) nur für den privaten (nicht-kommerziellen) Gebrauch zulässig ist.
12 hbuss 16
// + AUSNAHME: Ein bei www.mikrokopter.de erworbener vorbestückter MK3Mag darf als Baugruppe auch in kommerziellen Systemen verbaut werden
17
// + Im Zweifelsfall bitte anfragen bei: info@mikrokopter.de
5 hbuss 18
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
32 holgerb 19
// + Werden Teile des Quellcodes (mit oder ohne Modifikation) weiterverwendet oder veröffentlicht,
5 hbuss 20
// + unterliegen sie auch diesen Nutzungsbedingungen und diese Nutzungsbedingungen incl. Copyright müssen dann beiliegen
21
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
22
// + Sollte die Software (auch auszugesweise) oder sonstige Informationen des MikroKopter-Projekts
23
// + auf anderen Webseiten oder sonstigen Medien veröffentlicht werden, muss unsere Webseite "http://www.mikrokopter.de"
24
// + eindeutig als Ursprung verlinkt werden
25
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
26
// + Keine Gewähr auf Fehlerfreiheit, Vollständigkeit oder Funktion
27
// + Benutzung auf eigene Gefahr
28
// + Wir übernehmen keinerlei Haftung für direkte oder indirekte Personen- oder Sachschäden
29
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
30
// + Die Funktion printf_P() unterliegt ihrer eigenen Lizenz und ist hiervon nicht betroffen
31
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
32 holgerb 32
// + Redistributions of source code (with or without modifications) must retain the above copyright notice,
5 hbuss 33
// + this list of conditions and the following disclaimer.
62 ingob 34
// +   * porting the sources to other systems or using the software on other systems (except hardware from www.mikrokopter.de) is not allowed
5 hbuss 35
// +   * Neither the name of the copyright holders nor the names of contributors may be used to endorse or promote products derived
36
// +     from this software without specific prior written permission.
32 holgerb 37
// +   * The use of this project (hardware, software, binary files, sources and documentation) is only permittet
5 hbuss 38
// +     for non-commercial use (directly or indirectly)
32 holgerb 39
// +     Commercial use (for excample: selling of MikroKopters, selling of PCBs, assembly, ...) is only permitted
5 hbuss 40
// +     with our written permission
12 hbuss 41
// +     Exception: A preassembled MK3Mag, purchased from www.mikrokopter.de may be used as a part of commercial systems
42
// +     In case of doubt please contact: info@MikroKopter.de
32 holgerb 43
// +   * If sources or documentations are redistributet on other webpages, our webpage (http://www.MikroKopter.de) must be
44
// +     clearly linked as origin
5 hbuss 45
// +  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
46
// +  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
47
// +  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
48
// +  ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
49
// +  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
50
// +  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
51
// +  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
12 hbuss 52
// +  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
53
// +  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
5 hbuss 54
// +  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
32 holgerb 55
// +  POSSIBILITY OF SUCH DAMAGE.
5 hbuss 56
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
32 holgerb 57
#include <avr/interrupt.h>
58
#include <math.h>
59
#include <stdlib.h>
60
#include <stdio.h>
17 holgerb 61
 
1 ingob 62
#include "main.h"
32 holgerb 63
#include "timer0.h"
64
#include "twislave.h"
65
#include "led.h"
66
#include "analog.h"
67
#include "uart.h"
1 ingob 68
 
36 hbuss 69
#define CALIBRATION_VERSION 1
32 holgerb 70
 
71
AttitudeSource_t AttitudeSource = ATTITUDE_SOURCE_ACC;
72
Orientation_t Orientation = ORIENTATION_FC;
73
 
74
uint16_t Led_Timer = 0;
75
 
76
typedef struct
1 ingob 77
{
32 holgerb 78
        int16_t Range;
79
        int16_t Offset;
80
}  Scaling_t;
1 ingob 81
 
32 holgerb 82
typedef struct
83
{
84
        Scaling_t MagX;
85
        Scaling_t MagY;
86
        Scaling_t MagZ;
87
        Scaling_t AccX;
88
        Scaling_t AccY;
89
        Scaling_t AccZ;
71 killagreg 90
        uint8_t Version;
32 holgerb 91
}  Calibration_t;
92
 
93
Calibration_t eeCalibration EEMEM;      // calibration data in EEProm
94
Calibration_t Calibration;              // calibration data in RAM
95
 
96
// magnet sensor variable
37 killagreg 97
int16_t RawMagnet1a, RawMagnet1b;                       // raw magnet sensor data
32 holgerb 98
int16_t RawMagnet2a, RawMagnet2b;
99
int16_t RawMagnet3a, RawMagnet3b;
37 killagreg 100
int16_t UncalMagX, UncalMagY, UncalMagZ;        // sensor signal difference without Scaling
32 holgerb 101
int16_t MagX = 0, MagY = 0, MagZ = 0;           // rescaled magnetic field readings
102
 
103
// acceleration sensor variables
104
int16_t RawAccX = 0, RawAccY = 0, RawAccZ = 0;                  // raw acceleration readings
105
int16_t AccX = 0, AccY = 0, AccZ = 0;                                   // rescaled acceleration readings
106
int16_t AccAttitudeNick = 0, AccAttitudeRoll = 0;               // nick and roll angle from acc
107
 
108
int16_t Heading = -1;                                           // the current compass heading in deg
68 holgerb 109
int16_t ZeroHeading = 180;
71 killagreg 110
uint8_t InternalCalstate = 0, ActualCalstate = 0;
111
int8_t PotiToFC[12] = {0,0,0,0,0,0,0,0,0,0,0,0};
32 holgerb 112
 
1 ingob 113
void CalcFields(void)
7 hbuss 114
{
32 holgerb 115
        UncalMagX = (RawMagnet1a - RawMagnet1b);
116
        UncalMagY = (RawMagnet3a - RawMagnet3b);
117
        UncalMagZ = (RawMagnet2a - RawMagnet2b);
118
        if(Calibration.MagX.Range != 0) MagX = (1024L * (int32_t)(UncalMagX - Calibration.MagX.Offset)) / (Calibration.MagX.Range);
119
        else MagX = 0;
120
        if(Calibration.MagY.Range != 0) MagY = (1024L * (int32_t)(UncalMagY - Calibration.MagY.Offset)) / (Calibration.MagY.Range);
121
        else MagY = 0;
122
        if(Calibration.MagY.Range != 0) MagZ = (1024L * (int32_t)(UncalMagZ - Calibration.MagZ.Offset)) / (Calibration.MagZ.Range);
123
        else MagZ = 0;
68 holgerb 124
        if(AttitudeSource == ATTITUDE_SOURCE_ACC)
32 holgerb 125
        {
126
                AccX = (RawAccX - Calibration.AccX.Offset);
127
                AccY = (RawAccY - Calibration.AccY.Offset);
128
                AccZ = (Calibration.AccZ.Offset - RawAccZ);
129
                #if (BOARD == 10) // the hardware 1.0 has the LIS3L02AL
130
                // acc mode assumes orientation like FC
131
                if(AccX >  136) AccAttitudeNick = -800;
132
                else
133
                if(AccX < -136) AccAttitudeNick = 800;
134
                else                    AccAttitudeNick = (int16_t)(-1800.0 * asin((double) AccX / 138.0) / M_PI);
135
 
136
 
137
                if(AccY >  136) AccAttitudeRoll = 800;
138
                else
139
                if(AccY < -136) AccAttitudeRoll = -800;
140
                else                    AccAttitudeRoll = (int16_t)( 1800.0 * asin((double) AccY / 138.0) / M_PI);
141
 
142
                #else // the hardware 1.1 has the LIS344ALH with a different axis definition (X -> -Y, Y -> X, Z -> Z)
143
                // acc mode assumes orientation like FC
144
                if(AccY >  136) AccAttitudeNick = 800;
145
                else
146
                if(AccY < -136) AccAttitudeNick = -800;
147
                else                    AccAttitudeNick = (int16_t)( 1800.0 * asin((double) AccY / 138.0) / M_PI);
148
 
149
 
150
                if(AccX >  136) AccAttitudeRoll = 800;
151
                else
152
                if(AccX < -136) AccAttitudeRoll = -800;
153
                else                    AccAttitudeRoll = (int16_t)( 1800.0 * asin((double) AccX / 138.0) / M_PI);
154
                #endif
155
        }
1 ingob 156
}
157
 
32 holgerb 158
 
1 ingob 159
void CalcHeading(void)
160
{
55 killagreg 161
        double nick_rad, roll_rad, Cx = 0, Cy = 0, Cz = 0, Hx = 0, Hy = 0;
33 killagreg 162
        int16_t nick, roll;
32 holgerb 163
        int16_t heading = -1;
1 ingob 164
 
32 holgerb 165
        // blink code for normal operation
166
        if(CheckDelay(Led_Timer))
167
        {
37 killagreg 168
                if(Calibration.Version != CALIBRATION_VERSION) LED_GRN_TOGGLE;
36 hbuss 169
                else LED_GRN_ON;
170
                Led_Timer = SetDelay(150);
32 holgerb 171
        }
55 killagreg 172
 
173
        if(Calibration.Version != CALIBRATION_VERSION) heading = -1; // Version of the calibration Data does not match
174
        else
32 holgerb 175
        {
55 killagreg 176
                switch(Orientation)
177
                {
178
                        case ORIENTATION_NC:
179
                                Cx = (double)MagX;
180
                                Cy = (double)MagY;
181
                                Cz = (double)MagZ;
182
                                break;
7 hbuss 183
 
55 killagreg 184
                        case ORIENTATION_FC:
185
                                // rotation of 90 deg compared to NC setup
186
                                Cx = (double)MagY;
187
                                Cy = -(double)MagX;
188
                                Cz = (double)MagZ;
189
                                break;
190
                }
70 holgerb 191
#ifdef HEADTRACKER
192
AttitudeSource = ATTITUDE_SOURCE_ACC;
193
#endif
55 killagreg 194
                // calculate nick and roll angle in rad
195
                switch(AttitudeSource)
196
                {
197
                        case ATTITUDE_SOURCE_I2C:
198
                                cli(); // stop interrupts
199
                                nick = I2C_WriteAttitude.Nick;
200
                                roll = I2C_WriteAttitude.Roll;
201
                                sei(); // start interrupts
202
                                break;
203
                        case ATTITUDE_SOURCE_UART:
204
                                cli(); // stop interrupts
205
                                nick = ExternData.Attitude[NICK];
206
                                roll = ExternData.Attitude[ROLL];
207
                                sei(); // start interrupts
208
                                break;
209
                        case ATTITUDE_SOURCE_ACC:
210
                                nick = AccAttitudeNick;
211
                                roll = AccAttitudeRoll;
212
                                break;
213
                        default:
214
                                nick = 0;
215
                                roll = 0;
32 holgerb 216
                        break;
55 killagreg 217
                }
32 holgerb 218
 
55 killagreg 219
                nick_rad = ((double)nick * M_PI) / 1800.0;
220
                roll_rad = ((double)roll * M_PI) / 1800.0;
32 holgerb 221
 
55 killagreg 222
                // calculate attitude correction
223
                Hx = Cx * cos(nick_rad) - Cz * sin(nick_rad);
224
                Hy = Cy * cos(roll_rad) + Cz * sin(roll_rad);
32 holgerb 225
 
55 killagreg 226
                DebugOut.Analog[27] = (int16_t)Hx;
227
                DebugOut.Analog[28] = (int16_t)Hy;
32 holgerb 228
 
55 killagreg 229
                // calculate Heading
230
                heading = (int16_t)((180.0 * atan2(Hy, Hx)) / M_PI);
231
                // atan2 returns angular range from -180 deg to 180 deg in counter clockwise notation
232
                // but the compass course is defined in a range from 0 deg to 360 deg clockwise notation.
233
                if (heading < 0) heading = -heading;
234
                else heading = 360 - heading;
235
        }
236
                // stop interrrupts during heading update to avoid transmitting heading between the update of both bytes of the int16_t
237
                cli(); // stop interrupts
238
                if(abs(heading) < 361) Heading = heading;
239
                else (Heading = -1);
240
                sei(); // start interrupts
1 ingob 241
}
242
 
7 hbuss 243
void Calibrate(void)
244
{
32 holgerb 245
        static uint8_t calold = 0;
246
        static int16_t Xmin = 0, Xmax = 0, Ymin = 0, Ymax = 0, Zmin = 0, Zmax = 0;
247
        static uint8_t blinkcount = 0;
248
        static uint8_t invert_blinking = 0;
33 killagreg 249
 
68 holgerb 250
        if(ActualCalstate > 5) ActualCalstate = 0;
32 holgerb 251
        // blink code for current calibration state
68 holgerb 252
        if(ActualCalstate)
32 holgerb 253
        {
68 holgerb 254
                if(CheckDelay(Led_Timer) || (ActualCalstate != calold))
32 holgerb 255
                {
256
                        if(blinkcount & 0x01) if(invert_blinking) LED_GRN_ON; else LED_GRN_OFF;
257
                        else if(invert_blinking) LED_GRN_OFF; else LED_GRN_ON;
258
 
259
                        // end of blinkcount sequence
68 holgerb 260
                        if((blinkcount + 1 ) >= (2 * ActualCalstate))
32 holgerb 261
                        {
262
                                blinkcount = 0;
35 killagreg 263
                                Led_Timer = SetDelay(1500);
32 holgerb 264
                        }
265
                        else
266
                        {
267
                                blinkcount++;
35 killagreg 268
                                Led_Timer = SetDelay(100);
32 holgerb 269
                        }
270
                }
271
        }
272
        else
273
        {
274
                if(invert_blinking) LED_GRN_ON; else LED_GRN_OFF;
275
        }
276
        // calibration state machine
68 holgerb 277
        switch(ActualCalstate)
32 holgerb 278
        {
279
                case 1: // 1st step of calibration
280
                        // initialize ranges
281
                        // used to change the orientation of the MK3MAG in the horizontal plane
282
                        Xmin =  10000;
283
                        Xmax = -10000;
284
                        Ymin =  10000;
285
                        Ymax = -10000;
286
                        Zmin =  10000;
287
                        Zmax = -10000;
288
                        Calibration.AccX.Offset = RawAccX;
289
                        Calibration.AccY.Offset = RawAccY;
37 killagreg 290
                        Calibration.AccZ.Offset = RawAccZ;
291
                        invert_blinking = 0;
32 holgerb 292
                        break;
293
 
294
                case 2: // 2nd step of calibration
295
                        // find Min and Max of the X- and Y-Sensors during rotation in the horizontal plane
296
                        if(UncalMagX < Xmin) Xmin = UncalMagX;
297
                        if(UncalMagX > Xmax) Xmax = UncalMagX;
298
                        if(UncalMagY < Ymin) Ymin = UncalMagY;
299
                        if(UncalMagY > Ymax) Ymax = UncalMagY;
37 killagreg 300
                        invert_blinking = 1;
32 holgerb 301
                        break;
302
 
303
                case 3: // 3rd step of calibration
304
                        // used to change the orientation of the MK3MAG vertical to the horizontal plane
37 killagreg 305
                        invert_blinking = 0;
32 holgerb 306
                        break;
307
 
308
                case 4:
309
                        // find Min and Max of the Z-Sensor
310
                        if(UncalMagZ < Zmin) Zmin = UncalMagZ;
311
                        if(UncalMagZ > Zmax) Zmax = UncalMagZ;
37 killagreg 312
                        invert_blinking = 1;
32 holgerb 313
                        break;
314
 
315
                case 5:
316
                        // Save values
68 holgerb 317
                        if(ActualCalstate != calold) // avoid continously writing of eeprom!
32 holgerb 318
                        {
319
                                Calibration.MagX.Range = Xmax - Xmin;
320
                                Calibration.MagX.Offset = (Xmin + Xmax) / 2;
321
                                Calibration.MagY.Range = Ymax - Ymin;
322
                                Calibration.MagY.Offset = (Ymin + Ymax) / 2;
323
                                Calibration.MagZ.Range = Zmax - Zmin;
324
                                Calibration.MagZ.Offset = (Zmin + Zmax) / 2;
325
                                if((Calibration.MagX.Range > 150) && (Calibration.MagY.Range > 150) && (Calibration.MagZ.Range > 150))
326
                                {
36 hbuss 327
                                        Calibration.Version = CALIBRATION_VERSION;
34 killagreg 328
                                        // indicate write process by setting the led off for 2 seconds
329
                                        LED_GRN_OFF;
32 holgerb 330
                                        eeprom_write_block(&Calibration, &eeCalibration, sizeof(Calibration));
331
                                        Led_Timer = SetDelay(2000);
332
                                        // reset  blinkcode
333
                                        blinkcount = 0;
334
                                }
55 killagreg 335
                                else
336
                                {
337
                                        // restore old calibration data from eeprom
338
                                        eeprom_read_block(&Calibration, &eeCalibration, sizeof(Calibration));
339
                                }
32 holgerb 340
                        }
37 killagreg 341
                        invert_blinking = 0;
32 holgerb 342
                        break;
343
 
344
                default:
345
                        break;
346
        }
68 holgerb 347
        calold = ActualCalstate;
7 hbuss 348
}
1 ingob 349
 
32 holgerb 350
 
7 hbuss 351
void SetDebugValues(void)
352
{
32 holgerb 353
        DebugOut.Analog[0] =  MagX;
354
        DebugOut.Analog[1] =  MagY;
355
        DebugOut.Analog[2] =  MagZ;
356
        DebugOut.Analog[3] =  UncalMagX;
357
        DebugOut.Analog[4] =  UncalMagY;
358
        DebugOut.Analog[5] =  UncalMagZ;
359
        switch(AttitudeSource)
360
        {
361
                case ATTITUDE_SOURCE_ACC:
362
                        DebugOut.Analog[6] =  AccAttitudeNick;
363
                        DebugOut.Analog[7] =  AccAttitudeRoll;
364
                        break;
365
 
366
                case ATTITUDE_SOURCE_UART:
367
                        DebugOut.Analog[6] =  ExternData.Attitude[NICK];
368
                        DebugOut.Analog[7] =  ExternData.Attitude[ROLL];
369
                        break;
370
                case ATTITUDE_SOURCE_I2C:
371
                        DebugOut.Analog[6] =  I2C_WriteAttitude.Nick;
372
                        DebugOut.Analog[7] =  I2C_WriteAttitude.Roll;
373
                        break;
69 killagreg 374
                default:
68 holgerb 375
                        DebugOut.Analog[6] =  -1;
376
                        DebugOut.Analog[7] =  -1;
377
                        break;
32 holgerb 378
        }
379
        DebugOut.Analog[8] =  Calibration.MagX.Offset;
380
        DebugOut.Analog[9] =  Calibration.MagX.Range;
381
        DebugOut.Analog[10] = Calibration.MagY.Offset;
382
        DebugOut.Analog[11] = Calibration.MagY.Range;
383
        DebugOut.Analog[12] = Calibration.MagZ.Offset;
384
        DebugOut.Analog[13] = Calibration.MagZ.Range;
68 holgerb 385
    DebugOut.Analog[14] = ActualCalstate;
32 holgerb 386
        DebugOut.Analog[15] = Heading;
68 holgerb 387
        DebugOut.Analog[16] = 0;
388
        DebugOut.Analog[17] = 0;
32 holgerb 389
        DebugOut.Analog[18] = AccX;
390
        DebugOut.Analog[19] = AccY;
391
        DebugOut.Analog[20] = AccZ;
392
        DebugOut.Analog[21] = RawAccX;
393
        DebugOut.Analog[22] = RawAccY;
394
        DebugOut.Analog[23] = RawAccZ;
68 holgerb 395
        DebugOut.Analog[24] = PotiToFC[0];
396
        DebugOut.Analog[25] = PotiToFC[1];
397
        DebugOut.Analog[26] = PotiToFC[2];
37 killagreg 398
        DebugOut.Analog[29] = AttitudeSource;
7 hbuss 399
}
400
 
16 holgerb 401
void AccMeasurement(void)
402
{
32 holgerb 403
        if(AccPresent)
404
        {
405
                RawAccX = (RawAccX + (int16_t)ADC_GetValue(ACC_X))/2;
406
                RawAccY = (RawAccY + (int16_t)ADC_GetValue(ACC_Y))/2;
407
                RawAccZ = (RawAccZ + (int16_t)ADC_GetValue(ACC_Z))/2;
408
        }
409
        else
410
        {
411
                RawAccX = 0;
412
                RawAccY = 0;
413
                RawAccZ = 0;
414
        }
16 holgerb 415
}
7 hbuss 416
 
68 holgerb 417
#ifdef HEADTRACKER
418
void CalcFcPotis(void)
419
{
69 killagreg 420
        int16_t tmp0, tmp1, tmp2;
421
        if(AccPresent)
422
        {
71 killagreg 423
                tmp0 = AccAttitudeNick/4;
424
                tmp1 = AccAttitudeRoll/4;
425
                tmp2 = (360 + Heading - ZeroHeading) % 360;
426
                tmp2 -= 180;
427
                tmp2 *= 2;
428
                if(tmp0 > 127) tmp0 = 127; else if(tmp0 < -127) tmp0 = -127;
429
                if(tmp1 > 127) tmp1 = 127; else if(tmp1 < -127) tmp1 = -127;
430
                if(tmp2 > 127) tmp2 = 127; else if(tmp2 < -127) tmp2 = -127;
431
                PotiToFC[0] = (PotiToFC[0] + tmp0) / 2;
432
                PotiToFC[1] = (PotiToFC[1] + tmp1) / 2;
433
                PotiToFC[2] = (PotiToFC[2] + tmp2) / 2;
434
        }
68 holgerb 435
}
436
#endif
437
 
1 ingob 438
int main (void)
439
{
55 killagreg 440
        static uint8_t state = 0;
441
        static uint16_t statetimer;
32 holgerb 442
        // reset input pullup
443
        DDRC &=~((1<<DDC6));
444
        PORTC |= (1<<PORTC6);
17 holgerb 445
 
37 killagreg 446
        LED_Init();
447
        TIMER0_Init();
448
        USART0_Init();
449
        ADC_Init();
32 holgerb 450
        I2C_Init();
17 holgerb 451
 
37 killagreg 452
        sei(); // enable globale interrupts
63 holgerb 453
        USART0_Print("\n\rthe use of this software is only permitted\n\ron original MikroKopter-Hardware");
68 holgerb 454
        USART0_Print("\n\rwww.MikroKopter.de (c) HiSystems GmbH\n\n");
455
#ifdef HEADTRACKER
72 killagreg 456
        USART0_Print("\n\rHead-Tracker");
68 holgerb 457
#endif
37 killagreg 458
        if(AccPresent)
459
        {
72 killagreg 460
                USART0_Print("\r\rACC present");
32 holgerb 461
        }
68 holgerb 462
#ifdef HEADTRACKER
72 killagreg 463
        else USART0_Print("\n\rERROR: NO ACC");
68 holgerb 464
#endif
32 holgerb 465
 
37 killagreg 466
        LED_GRN_ON;
32 holgerb 467
 
37 killagreg 468
        Led_Timer = SetDelay(200);
32 holgerb 469
 
470
        // read calibration info from eeprom
471
        eeprom_read_block(&Calibration, &eeCalibration, sizeof(Calibration));
472
 
68 holgerb 473
        InternalCalstate = 0;
37 killagreg 474
        ExternData.CalState = 0;
475
        I2C_WriteCal.CalByte = 0;
69 killagreg 476
        ActualCalstate = 0;
55 killagreg 477
        statetimer = SetDelay(0);
32 holgerb 478
        // main loop
37 killagreg 479
        while (1)
480
        {
7 hbuss 481
 
55 killagreg 482
                switch(state)
483
                {
484
                        case 0:
485
                        if(CheckDelay(statetimer))
486
                        {
487
                                FLIP_LOW;
488
                                statetimer = SetDelay(2);
489
                                state = 1;
490
                        }
491
                        break;
1 ingob 492
 
55 killagreg 493
                        case 1:
494
                        if(CheckDelay(statetimer))
495
                        {
496
                                RawMagnet1a = ADC_GetValue(MAG_X);
497
                                RawMagnet2a = -ADC_GetValue(MAG_Y);
498
                                RawMagnet3a = ADC_GetValue(MAG_Z);
499
                                AccMeasurement();
500
                                statetimer = SetDelay(1);
501
                                state = 2;
502
                        }
503
                        break;
1 ingob 504
 
55 killagreg 505
                        case 2:
506
                        if(CheckDelay(statetimer))
507
                        {
508
                                FLIP_HIGH;
509
                                statetimer = SetDelay(2);
510
                                state = 3;
511
                        }
512
                        break;
16 holgerb 513
 
55 killagreg 514
                        case 3:
515
                        if(CheckDelay(statetimer))
516
                        {
517
                                RawMagnet1b = ADC_GetValue(MAG_X);
518
                                RawMagnet2b = -ADC_GetValue(MAG_Y);
519
                                RawMagnet3b = ADC_GetValue(MAG_Z);
520
                                AccMeasurement();
521
                                statetimer = SetDelay(1);
522
                                state = 0;
523
                                CalcFields();
68 holgerb 524
        // check both sources of communication for calibration request
69 killagreg 525
                                if(InternalCalstate)            ActualCalstate = InternalCalstate;
526
                                else
68 holgerb 527
                                if(I2C_WriteCal.CalByte)        ActualCalstate = I2C_WriteCal.CalByte;
528
                                else                                            ActualCalstate = ExternData.CalState;
529
                                if(ActualCalstate) Calibrate();
55 killagreg 530
                                else CalcHeading();
531
                                if(NC_Connected) NC_Connected--;
532
                                if(FC_Connected) FC_Connected--;
533
                                if(PC_Connected) PC_Connected--;
534
                                // fall back to attitude estimation from onboard acc sensor if NC or FC does'nt send attitude data
68 holgerb 535
#ifdef HEADTRACKER
69 killagreg 536
                                CalcFcPotis();
68 holgerb 537
                                if(AccPresent) AttitudeSource = ATTITUDE_SOURCE_ACC;
538
#else
55 killagreg 539
                                if(!FC_Connected && ! NC_Connected)
540
                                {
68 holgerb 541
                                        if(AccPresent) AttitudeSource = ATTITUDE_SOURCE_ACC;
542
                                        else AttitudeSource = ATTITUDE_SOURCE_NONE;
55 killagreg 543
                                        Orientation = ORIENTATION_FC;
544
                                }
68 holgerb 545
#endif
55 killagreg 546
                        }
547
                        break;
548
 
549
                        default: // should never happen
550
                        statetimer = SetDelay(0);
551
                        state = 0;
552
                        break;
553
                } // one full state cylce is 6 ms
554
 
32 holgerb 555
                // check data from USART
37 killagreg 556
                USART0_ProcessRxData();
68 holgerb 557
#ifdef HEADTRACKER
558
                USART0_TransmitTxData();
559
#else
37 killagreg 560
                if(PC_Connected)
561
                {
562
                        USART0_EnableTXD();
563
                        USART0_TransmitTxData();
32 holgerb 564
                }
565
                else
566
                {
567
                        USART0_DisableTXD();
568
                }
68 holgerb 569
#endif
32 holgerb 570
        } // while(1)
1 ingob 571
}
572