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241 killagreg 1
/*#######################################################################################*/
2
/* !!! THIS IS NOT FREE SOFTWARE !!!                                                     */
3
/*#######################################################################################*/
4
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
5
// + Copyright (c) 2008 Ingo Busker, Holger Buss
6
// + Nur für den privaten Gebrauch / NON-COMMERCIAL USE ONLY
7
// + FOR NON COMMERCIAL USE ONLY
8
// + www.MikroKopter.com
9
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
10
// + Es gilt für das gesamte Projekt (Hardware, Software, Binärfiles, Sourcecode und Dokumentation),
11
// + dass eine Nutzung (auch auszugsweise) nur für den privaten (nicht-kommerziellen) Gebrauch zulässig ist.
12
// + Sollten direkte oder indirekte kommerzielle Absichten verfolgt werden, ist mit uns (info@mikrokopter.de) Kontakt
13
// + bzgl. der Nutzungsbedingungen aufzunehmen.
14
// + Eine kommerzielle Nutzung ist z.B.Verkauf von MikroKoptern, Bestückung und Verkauf von Platinen oder Bausätzen,
15
// + Verkauf von Luftbildaufnahmen, usw.
16
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
17
// + Werden Teile des Quellcodes (mit oder ohne Modifikation) weiterverwendet oder veröffentlicht,
18
// + unterliegen sie auch diesen Nutzungsbedingungen und diese Nutzungsbedingungen incl. Copyright müssen dann beiliegen
19
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
20
// + Sollte die Software (auch auszugesweise) oder sonstige Informationen des MikroKopter-Projekts
21
// + auf anderen Webseiten oder sonstigen Medien veröffentlicht werden, muss unsere Webseite "http://www.mikrokopter.de"
22
// + eindeutig als Ursprung verlinkt werden
23
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
24
// + Keine Gewähr auf Fehlerfreiheit, Vollständigkeit oder Funktion
25
// + Benutzung auf eigene Gefahr
26
// + Wir übernehmen keinerlei Haftung für direkte oder indirekte Personen- oder Sachschäden
27
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
28
// + Die Portierung oder Nutzung der Software (oder Teile davon) auf andere Systeme (ausser der Hardware von www.mikrokopter.de) ist nur
29
// + mit unserer Zustimmung zulässig
30
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
31
// + Die Funktion printf_P() unterliegt ihrer eigenen Lizenz und ist hiervon nicht betroffen
32
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
33
// + Redistributions of source code (with or without modifications) must retain the above copyright notice,
34
// + this list of conditions and the following disclaimer.
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.
37
// +   * The use of this project (hardware, software, binary files, sources and documentation) is only permitted
38
// +     for non-commercial use (directly or indirectly)
39
// +     Commercial use (for excample: selling of MikroKopters, selling of PCBs, assembly, ...) is only permitted
40
// +     with our written permission
41
// +   * If sources or documentations are redistributet on other webpages, out webpage (http://www.MikroKopter.de) must be
42
// +     clearly linked as origin
43
// +   * porting the sources to other systems or using the software on other systems (except hardware from www.mikrokopter.de) is not allowed
44
//
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
52
// +  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
53
// +  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
54
// +  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
55
// +  POSSIBILITY OF SUCH DAMAGE.
56
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
292 killagreg 57
#include <stdio.h>
241 killagreg 58
#include <string.h>
59
#include "91x_lib.h"
60
#include "mk3mag.h"
61
#include "i2c.h"
62
#include "timer1.h"
242 killagreg 63
#include "led.h"
241 killagreg 64
#include "main.h"
65
#include "uart1.h"
242 killagreg 66
#include "compass.h"
241 killagreg 67
 
68
#define MK3MAG_SLAVE_ADDRESS            0x50  // i2C slave address
69
 
242 killagreg 70
u8 MK3MAG_Present = 0;
241 killagreg 71
 
242 killagreg 72
typedef struct
73
{
74
  s16 Nick;
75
  s16 Roll;
76
} __attribute__((packed)) MK3MAG_WriteAttitude_t;
77
 
292 killagreg 78
typedef struct
79
{
80
  u8 Major;
81
  u8 Minor;
82
  u8 Patch;
83
  u8 Compatible;
84
} __attribute__((packed)) MK3MAG_Version_t;
85
 
86
typedef struct
87
{
88
  u8 CalByte;
89
  u8 Dummy1;
90
  u8 Dummy2;
91
} __attribute__((packed)) MK3MAG_Cal_t;
92
 
241 killagreg 93
// Transfer buffers
94
volatile MK3MAG_WriteAttitude_t         MK3MAG_WriteAttitude;
95
volatile MK3MAG_Version_t                       MK3MAG_Version;
96
volatile MK3MAG_Cal_t                           MK3MAG_WriteCal;
97
volatile MK3MAG_Cal_t                           MK3MAG_ReadCal;
98
 
99
// -------------------------------------------------------------------------------
100
// the calculation of the MK3MAG packet checksum
101
 
102
// calculate the crc of  bytecount bytes in buffer
103
u8 MK3MAG_CalcCRC(u8* pBuffer, u8 bytecount)
104
{
105
        u8 i, crc = 0;
106
        for(i=0; i < bytecount; i++)
107
        {
108
                crc += pBuffer[i];
109
        }
110
        crc = ~crc;
111
        return crc;
112
}
113
 
114
// assuming the last byte in buffer is the crc byte
115
u8 MK3MAG_CheckCRC(u8* pBuffer, u8 BuffLen)
116
{
117
        u8 crc = 0, retval = 0;
118
        if(BuffLen == 0) return(retval);
119
        crc = MK3MAG_CalcCRC(pBuffer, BuffLen-1);
120
        if(crc == pBuffer[BuffLen-1])
121
        {
122
                retval = 1;
123
                DebugOut.Analog[15]++; // count mk3mag ok
124
        }
125
        else
126
        {
127
                retval = 0;
128
                DebugOut.Analog[14]++; // count mk3mag crc error
129
        }
130
        return(retval);
131
}
132
 
133
// -------------------------------------------------------------------------------
134
// the I2C rx data handler functions
135
 
136
// rx data handler for version info request
137
void MK3MAG_UpdateVersion(u8* pRxBuffer, u8 RxBufferSize)
138
{       // if crc is ok and number of byte are matching
139
        if(MK3MAG_CheckCRC(pRxBuffer, RxBufferSize) && (RxBufferSize == (sizeof(MK3MAG_Version)+1)) )
140
        {
141
                memcpy((u8 *)&MK3MAG_Version, pRxBuffer, sizeof(MK3MAG_Version));
142
        }                
143
}
144
 
145
// rx data handler for calibration request
146
void MK3MAG_UpdateCalibration(u8* pRxBuffer, u8 RxBufferSize)
147
{       // if crc is ok and number of byte are matching
148
        if(MK3MAG_CheckCRC(pRxBuffer, RxBufferSize) && (RxBufferSize == (sizeof(MK3MAG_ReadCal)+1)) )
149
        {
150
                memcpy((u8 *)&MK3MAG_ReadCal, pRxBuffer, sizeof(MK3MAG_ReadCal));
151
        }                        
152
}
153
 
154
// rx data handler for magnetic vector request
155
void MK3MAG_UpdateMagVector(u8* pRxBuffer, u8 RxBufferSize)
156
{       // if crc is ok and number of byte are matching
242 killagreg 157
        if(MK3MAG_CheckCRC(pRxBuffer, RxBufferSize) && (RxBufferSize == (sizeof(MagVector)+1)) )
241 killagreg 158
        {
292 killagreg 159
                s16vec_t *pMagVector = (s16vec_t*)pRxBuffer;
160
                MagVector.X = pMagVector->Y;
161
                MagVector.Y = pMagVector->X;
162
                MagVector.Z = -pMagVector->Z;    
163
                Compass_CalcHeading();
241 killagreg 164
        }                        
165
}
166
 
292 killagreg 167
//----------------------------------------------------------------
168
#define MK3MAG_CMD_VERSION              0x01
169
#define MK3MAG_CMD_READ_MAGVECT         0x02
170
#define MK3MAG_CMD_WRITE_CAL            0x04
241 killagreg 171
 
172
void MK3MAG_SendCommand(u8 command)
173
{
288 killagreg 174
        // try to catch the I2C buffer
248 killagreg 175
        if(I2C_LockBuffer(0))
241 killagreg 176
        {
248 killagreg 177
                u16 TxBytes = 0;
178
                u16 RxBytes = 0;
241 killagreg 179
                I2C_pRxHandler_t pRxHandlerFunc = NULL;
248 killagreg 180
 
241 killagreg 181
                // update current command id
248 killagreg 182
                I2C_Buffer[TxBytes++] = command;
241 killagreg 183
 
184
                // set pointers to data area with respect to the command id
185
                switch (command)
186
                {
187
                        case MK3MAG_CMD_VERSION:
188
                                RxBytes = sizeof(MK3MAG_Version)+1;
189
                                pRxHandlerFunc = &MK3MAG_UpdateVersion;
190
                                break;
191
                        case MK3MAG_CMD_WRITE_CAL:
192
                                RxBytes = sizeof(MK3MAG_ReadCal)+1;
193
                                pRxHandlerFunc = &MK3MAG_UpdateCalibration;
248 killagreg 194
                                memcpy((u8*)I2C_Buffer+1, (u8*)&MK3MAG_WriteCal, sizeof(MK3MAG_WriteCal));
195
                                TxBytes += sizeof(MK3MAG_WriteCal);
241 killagreg 196
                                break;
197
                        case MK3MAG_CMD_READ_MAGVECT:
242 killagreg 198
                                RxBytes = sizeof(MagVector)+1;
241 killagreg 199
                                pRxHandlerFunc = &MK3MAG_UpdateMagVector;
200
                                break;
201
                        default: // unknown command id
202
                                RxBytes = 0;
203
                                pRxHandlerFunc = NULL;
204
                                break;
205
                }
206
                // update packet checksum
248 killagreg 207
                I2C_Buffer[TxBytes] = MK3MAG_CalcCRC((u8*)I2C_Buffer, TxBytes);
208
                TxBytes++;
241 killagreg 209
                // initiate I2C transmission
248 killagreg 210
                I2C_Transmission(MK3MAG_SLAVE_ADDRESS, TxBytes, pRxHandlerFunc, RxBytes);
242 killagreg 211
        } // EOF I2C_State == I2C_IDLE  
241 killagreg 212
}
213
 
214
 
215
//----------------------------------------------------------------
242 killagreg 216
u8 MK3MAG_Init(void)
241 killagreg 217
{
218
        u8 msg[64];
219
        u8 repeat;
220
        u32 timeout;
221
 
242 killagreg 222
        MK3MAG_Present = 0;
241 killagreg 223
 
224
        MK3MAG_Version.Major = 0xFF;
225
        MK3MAG_Version.Minor = 0xFF;
226
        MK3MAG_Version.Patch = 0xFF;
227
        MK3MAG_Version.Compatible = 0xFF;
242 killagreg 228
 
254 killagreg 229
        Compass_Heading = -1;
242 killagreg 230
 
241 killagreg 231
        // polling of version info
232
        repeat = 0;
233
        do
234
        {
235
                MK3MAG_SendCommand(MK3MAG_CMD_VERSION);
342 holgerb 236
                if(Version_HW > 11) timeout = SetDelay(100);
237
                else timeout = SetDelay(250);
238
 
241 killagreg 239
                do
240
                {
241
                        if (MK3MAG_Version.Major != 0xFF) break; // break loop on success
242
                }while (!CheckDelay(timeout));
243
                UART1_PutString(".");
244
                repeat++;
245
        }while ((MK3MAG_Version.Major == 0xFF) && (repeat < 12)); // 12*250ms=3s
246
        // if we got it
247
        if (MK3MAG_Version.Major != 0xFF)
248
        {
242 killagreg 249
                sprintf(msg, " MK3MAG V%d.%d%c", MK3MAG_Version.Major, MK3MAG_Version.Minor, 'a' + MK3MAG_Version.Patch);
241 killagreg 250
                UART1_PutString(msg);
242 killagreg 251
                if(MK3MAG_Version.Compatible != MK3MAG_I2C_COMPATIBLE)
252
                {
253
                        UART1_PutString("\n\r MK3MAG not compatible!");
256 killagreg 254
                        UART_VersionInfo.HardwareError[0] |= NC_ERROR0_COMPASS_INCOMPATIBLE;
242 killagreg 255
                        LED_RED_ON;
256
                }
257
                else
258
                {       // version ok
259
                        MK3MAG_Present = 1;
260
                }
241 killagreg 261
        }
242 killagreg 262
        return(MK3MAG_Present);
241 killagreg 263
}
264
 
265
//----------------------------------------------------------------
292 killagreg 266
void MK3MAG_Update(void)
241 killagreg 267
{
292 killagreg 268
        static u32 TimerUpdate = 0;
269
        static s16 x_max,y_max,z_max,x_min,y_min,z_min;
339 holgerb 270
        static u8 last_state;
271
        u8 msg[64];
272
        u16 MinCaclibration = 500;
241 killagreg 273
 
242 killagreg 274
        if( (I2C_State == I2C_STATE_OFF) || !MK3MAG_Present ) return;
241 killagreg 275
 
292 killagreg 276
        if(CheckDelay(TimerUpdate))
241 killagreg 277
        {
278
                // check for incomming compass calibration request
254 killagreg 279
                Compass_UpdateCalState();
280
                MK3MAG_WriteCal.CalByte = Compass_CalState;
292 killagreg 281
 
241 killagreg 282
                if(MK3MAG_ReadCal.CalByte != MK3MAG_WriteCal.CalByte)
292 killagreg 283
                {       // send new calibration state
241 killagreg 284
                        MK3MAG_SendCommand(MK3MAG_CMD_WRITE_CAL);
285
                }
292 killagreg 286
                else
287
                {       // calibration state matches
288
                        MK3MAG_SendCommand(MK3MAG_CMD_READ_MAGVECT); // initiate magvector transfer
289
 
290
                        switch(Compass_CalState)
291
                        {
292
                                case 1:
339 holgerb 293
                                    if(last_state != Compass_CalState)
294
                                         {
295
                                          UART1_PutString("\r\nMK3Mag calibration\n\r");
342 holgerb 296
                                      if(EarthMagneticStrengthTheoretic)
297
                                                {
298
                                                  MinCaclibration = (MinCaclibration * EarthMagneticStrengthTheoretic) / 50;
299
                                                  sprintf(msg, "Earth field on your location should be: %iuT\r\n",EarthMagneticStrengthTheoretic);
300
                                                  UART1_PutString(msg);
301
                                                 }
302
                                           else UART1_PutString("without GPS\n\r");
339 holgerb 303
                                         }
292 killagreg 304
                                        x_max = -30000; y_max = -30000; z_max = -30000;
305
                                        x_min = 30000; y_min = 30000; z_min = 30000;
306
                                        break;
307
 
308
                                case 2:
309
                                                 if(MagVector.X > x_max) { x_max = MagVector.X; BeepTime = 60; }
310
                                        else if(MagVector.X < x_min) { x_min = MagVector.X; BeepTime = 20; }
311
                                                 if(MagVector.Y > y_max) { y_max = MagVector.Y; BeepTime = 60; }
312
                                        else if(MagVector.Y < y_min) { y_min = MagVector.Y; BeepTime = 20; }
313
                                        break;
314
 
315
                                case 4:
316
                                                 if(MagVector.Z > z_max) { z_max = MagVector.Z; BeepTime = 80; }
317
                                        else if(MagVector.Z < z_min) { z_min = MagVector.Z; BeepTime = 80; }
318
                                        break;
339 holgerb 319
                                case 5:
320
                                    if(last_state == Compass_CalState) break;
321
                                        if(((x_max - x_min) > MinCaclibration) && ((y_max - y_min) > MinCaclibration) && ((z_max - z_min) > MinCaclibration))
322
                                        {
323
                                        BeepTime = 2500;
342 holgerb 324
                                        UART1_PutString("\r\n-> Calibration okay <-\n\r");
339 holgerb 325
                                        }
326
                                        else
327
                                        {
328
                                        UART1_PutString("\r\nCalibration FAILED - Values too low: ");
329
                                    if((x_max - x_min) < MinCaclibration) UART1_PutString("X! ");
342 holgerb 330
                                    if((y_max - y_min) < MinCaclibration) UART1_PutString("Y! ");
339 holgerb 331
                                    if((z_max - z_min) < MinCaclibration) UART1_PutString("Z! ");
332
                                        UART1_PutString("\r\n");
333
                                        }
334
                                        UART1_PutString(msg);
335
                                        sprintf(msg, "\r\nX: (%i - %i = %i)\r\n",x_max,x_min,x_max - x_min);
336
                                        UART1_PutString(msg);
337
                                        sprintf(msg, "Y: (%i - %i = %i)\r\n",y_max,y_min,y_max - y_min);
338
                                        UART1_PutString(msg);
339
                                        sprintf(msg, "Z: (%i - %i = %i)\r\n",z_max,z_min,z_max - z_min);
340
                                        UART1_PutString(msg);
342 holgerb 341
                                        sprintf(msg, "(Minimum ampilitude is: %i)\r\n",MinCaclibration);
342
                                        UART1_PutString(msg);
339 holgerb 343
                                        break;
292 killagreg 344
                                default:
345
                                        break;
339 holgerb 346
                        }
347
                        last_state = Compass_CalState;
287 holgerb 348
                }
292 killagreg 349
                TimerUpdate = SetDelay(20);    // every 20 ms are 50 Hz
241 killagreg 350
        }
351
}