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1662 killagreg 1
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2
// + www.MikroKopter.com
3
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2050 holgerb 4
// + Software Nutzungsbedingungen (english version: see below)
5
// + der Fa. HiSystems GmbH, Flachsmeerstrasse 2, 26802 Moormerland - nachfolgend Lizenzgeber genannt -
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// + Der Lizenzgeber räumt dem Kunden ein nicht-ausschließliches, zeitlich und räumlich* unbeschränktes Recht ein, die im den
7
// + Mikrocontroller verwendete Firmware für die Hardware Flight-Ctrl, Navi-Ctrl, BL-Ctrl, MK3Mag & PC-Programm MikroKopter-Tool 
8
// + - nachfolgend Software genannt - nur für private Zwecke zu nutzen.
9
// + Der Einsatz dieser Software ist nur auf oder mit Produkten des Lizenzgebers zulässig.
1662 killagreg 10
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2050 holgerb 11
// + Die vom Lizenzgeber gelieferte Software ist urheberrechtlich geschützt. Alle Rechte an der Software sowie an sonstigen im
12
// + Rahmen der Vertragsanbahnung und Vertragsdurchführung überlassenen Unterlagen stehen im Verhältnis der Vertragspartner ausschließlich dem Lizenzgeber zu.
13
// + Die in der Software enthaltenen Copyright-Vermerke, Markenzeichen, andere Rechtsvorbehalte, Seriennummern sowie
14
// + sonstige der Programmidentifikation dienenden Merkmale dürfen vom Kunden nicht verändert oder unkenntlich gemacht werden.
15
// + Der Kunde trifft angemessene Vorkehrungen für den sicheren Einsatz der Software. Er wird die Software gründlich auf deren
16
// + Verwendbarkeit zu dem von ihm beabsichtigten Zweck testen, bevor er diese operativ einsetzt.
17
// + Die Haftung des Lizenzgebers wird - soweit gesetzlich zulässig - begrenzt in Höhe des typischen und vorhersehbaren
18
// + Schadens. Die gesetzliche Haftung bei Personenschäden und nach dem Produkthaftungsgesetz bleibt unberührt. Dem Lizenzgeber steht jedoch der Einwand 
19
// + des Mitverschuldens offen.
20
// + Der Kunde trifft angemessene Vorkehrungen für den Fall, dass die Software ganz oder teilweise nicht ordnungsgemäß arbeitet.
21
// + Er wird die Software gründlich auf deren Verwendbarkeit zu dem von ihm beabsichtigten Zweck testen, bevor er diese operativ einsetzt.
22
// + Der Kunde wird er seine Daten vor Einsatz der Software nach dem Stand der Technik sichern.
23
// + Der Kunde ist darüber unterrichtet, dass der Lizenzgeber seine Daten im zur Vertragsdurchführung erforderlichen Umfang
24
// + und auf Grundlage der Datenschutzvorschriften erhebt, speichert, verarbeitet und, sofern notwendig, an Dritte übermittelt.
25
// + *) Die räumliche Nutzung bezieht sich nur auf den Einsatzort, nicht auf die Reichweite der programmierten Software.
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// + #### ENDE DER NUTZUNGSBEDINGUNGEN ####'
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// +  Hinweis: Informationen über erweiterte Nutzungsrechte (wie z.B. Nutzung für nicht-private Zwecke) sind auf Anfrage per Email an info(@)hisystems.de verfügbar.
1662 killagreg 28
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2050 holgerb 29
// + Software LICENSING TERMS
1662 killagreg 30
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2050 holgerb 31
// + of HiSystems GmbH, Flachsmeerstrasse 2, 26802 Moormerland, Germany - the Licensor -
32
// + The Licensor grants the customer a non-exclusive license to use the microcontroller firmware of the Flight-Ctrl, Navi-Ctrl, BL-Ctrl, and MK3Mag hardware 
33
// + (the Software) exclusively for private purposes. The License is unrestricted with respect to time and territory*.
34
// + The Software may only be used with the Licensor's products.
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// + The Software provided by the Licensor is protected by copyright. With respect to the relationship between the parties to this
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// + agreement, all rights pertaining to the Software and other documents provided during the preparation and execution of this
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// + agreement shall be the property of the Licensor.
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// + The information contained in the Software copyright notices, trademarks, other legal reservations, serial numbers and other
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// + features that can be used to identify the program may not be altered or defaced by the customer.
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// + The customer shall be responsible for taking reasonable precautions
41
// + for the safe use of the Software. The customer shall test the Software thoroughly regarding its suitability for the
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// + intended purpose before implementing it for actual operation. The Licensor's liability shall be limited to the extent of typical and
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// + foreseeable damage to the extent permitted by law, notwithstanding statutory liability for bodily injury and product
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// + liability. However, the Licensor shall be entitled to the defense of contributory negligence.
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// + The customer will take adequate precautions in the case, that the software is not working properly. The customer will test
46
// + the software for his purpose before any operational usage. The customer will backup his data before using the software.
47
// + The customer understands that the Licensor collects, stores and processes, and, where required, forwards, customer data
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// + to third parties to the extent necessary for executing the agreement, subject to applicable data protection and privacy regulations.
49
// + *) The territory aspect only refers to the place where the Software is used, not its programmed range.
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// + #### END OF LICENSING TERMS ####
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// + Note: For information on license extensions (e.g. commercial use), please contact us at info(@)hisystems.de.
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// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 ingob 53
 
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#include <avr/io.h>
55
#include <avr/interrupt.h>
56
#include <util/twi.h>
57
#include "eeprom.h"
58
#include "twimaster.h"
59
#include "fc.h"
60
#include "analog.h"
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#include "uart.h"
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#include "timer0.h"
1 ingob 63
 
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volatile uint8_t twi_state      = TWI_STATE_MOTOR_TX;
65
volatile uint8_t dac_channel    = 0;
66
volatile uint8_t motor_write    = 0;
67
volatile uint8_t motor_read     = 0;
1744 holgerb 68
volatile uint8_t I2C_TransferActive = 0;
2407 holgerb 69
uint8_t Max_I2C_Packets = 12;
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volatile uint16_t I2CTimeout = 100;
72
 
73
uint8_t MissingMotor  = 0;
74
 
75
volatile uint8_t BLFlags = 0;
76
 
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MotorData_t Motor[MAX_MOTORS];
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RedundantBl_t RedundantMotor[MAX_MOTORS];
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// bit mask for witch BL the configuration should be sent
81
volatile uint16_t BLConfig_WriteMask = 0;
82
// bit mask for witch BL the configuration should be read
83
volatile uint16_t BLConfig_ReadMask = 0;
84
// buffer for BL Configuration
85
BLConfig_t BLConfig;
1648 killagreg 86
 
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#define I2C_WriteByte(byte) {TWDR = byte; TWCR = (1<<TWINT) | (1<<TWEN) | (1<<TWIE);}
88
#define I2C_ReceiveByte() {TWCR = (1<<TWINT) | (1<<TWEN) | (1<<TWIE) | (1<<TWEA);}
89
#define I2C_ReceiveLastByte() {TWCR = (1<<TWINT) | (1<<TWEN) | (1<<TWIE);}
1 ingob 90
 
1662 killagreg 91
#define SCL_CLOCK  200000L
92
#define I2C_TIMEOUT 30000
93
#define TWI_BASE_ADDRESS 0x52
94
 
95
/**************************************************/
96
/*   Initialize I2C (TWI)                         */
97
/**************************************************/
98
 
1743 holgerb 99
void I2C_Init(char clear)
1 ingob 100
{
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        uint8_t i;
102
        uint8_t sreg = SREG;
103
        cli();
1648 killagreg 104
 
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        // SDA is INPUT
106
        DDRC  &= ~(1<<DDC1);
107
        // SCL is output
108
        DDRC |= (1<<DDC0);
109
        // pull up SDA
110
        PORTC |= (1<<PORTC0)|(1<<PORTC1);
1648 killagreg 111
 
1662 killagreg 112
        // TWI Status Register
113
        // prescaler 1 (TWPS1 = 0, TWPS0 = 0)
114
        TWSR &= ~((1<<TWPS1)|(1<<TWPS0));
115
 
116
        // set TWI Bit Rate Register
117
        TWBR = ((F_CPU/SCL_CLOCK)-16)/2;
118
 
119
        twi_state               = TWI_STATE_MOTOR_TX;
120
        motor_write     = 0;
121
        motor_read              = 0;
122
 
1743 holgerb 123
        if(clear) for(i=0; i < MAX_MOTORS; i++)
1648 killagreg 124
        {
125
                Motor[i].Version        = 0;
126
                Motor[i].SetPoint       = 0;
127
                Motor[i].SetPointLowerBits      = 0;
128
                Motor[i].State          = 0;
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                Motor[i].ReadMode       = BL_READMODE_STATUS;
1648 killagreg 130
                Motor[i].Current        = 0;
131
                Motor[i].MaxPWM         = 0;
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                Motor[i].Temperature = 0;
1648 killagreg 133
        }
1743 holgerb 134
    sei();
1662 killagreg 135
        SREG = sreg;
1 ingob 136
}
137
 
1662 killagreg 138
void I2C_Reset(void)
173 holgerb 139
{
1662 killagreg 140
        // stop i2c bus
141
        I2C_Stop(TWI_STATE_MOTOR_TX);
142
        TWCR = (1<<TWINT); // reset to original state incl. interrupt flag reset
1648 killagreg 143
        TWAMR = 0;
144
        TWAR = 0;
145
        TWDR = 0;
146
        TWSR = 0;
147
        TWBR = 0;
1765 killagreg 148
    I2C_TransferActive = 0;
1743 holgerb 149
        I2C_Init(0);
1662 killagreg 150
        I2C_WriteByte(0);
151
        BLFlags |= BLFLAG_READ_VERSION;
173 holgerb 152
}
1 ingob 153
 
1662 killagreg 154
/****************************************/
155
/*        I2C ISR                       */
156
/****************************************/
157
ISR (TWI_vect)
158
{
159
        static uint8_t missing_motor = 0, motor_read_temperature = 0;
160
        static uint8_t *pBuff = 0;
161
        static uint8_t BuffLen = 0;
2407 holgerb 162
        static uint8_t max_packets = 0;
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    switch (twi_state++)
1648 killagreg 164
        {
1662 killagreg 165
                // Master Transmit
166
        case 0: // TWI_STATE_MOTOR_TX
1744 holgerb 167
            I2C_TransferActive = 1;
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                        // skip motor if not used in mixer
169
                        while((Mixer.Motor[motor_write][MIX_GAS] <= 0) && (motor_write < MAX_MOTORS)) motor_write++;
2407 holgerb 170
                        motor_write %= MAX_MOTORS;
171
                        if(++max_packets > Max_I2C_Packets) // writing finished, read now
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                        {
2407 holgerb 173
                                max_packets = 0;
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                                BLConfig_WriteMask = 0; // reset configuration bitmask
2407 holgerb 175
//motor_write = 0; // reset motor write counter for next cycle
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                                twi_state = TWI_STATE_MOTOR_RX;
177
                                I2C_WriteByte(TWI_BASE_ADDRESS + TW_READ + (motor_read<<1) ); // select slave address in rx mode
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                        }
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                        else I2C_WriteByte(TWI_BASE_ADDRESS + TW_WRITE + (motor_write<<1) ); // select slave address in tx mode
1648 killagreg 180
                        break;
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        case 1: // Send Data to Slave
182
                        I2C_WriteByte(Motor[motor_write].SetPoint); // transmit setpoint
183
                        // if old version has been detected
184
                        if(!(Motor[motor_write].Version & MOTOR_STATE_NEW_PROTOCOL_MASK))
1648 killagreg 185
                        {
186
                                twi_state = 4; //jump over sending more data
187
                        }
1662 killagreg 188
                        // the new version has been detected
189
                        else if(!( (Motor[motor_write].SetPointLowerBits && (RequiredMotors < 7)) || BLConfig_WriteMask || BLConfig_ReadMask )  )
190
                        {       // or LowerBits are zero and no BlConfig should be sent (saves round trip time)
191
                                twi_state = 4; //jump over sending more data
1648 killagreg 192
                        }
193
                        break;
1662 killagreg 194
        case 2: // lower bits of setpoint (higher resolution)
1666 killagreg 195
                        if ((0x0001<<motor_write) & BLConfig_ReadMask)
1662 killagreg 196
                        {
1666 killagreg 197
                                Motor[motor_write].ReadMode = BL_READMODE_CONFIG; // configuration request
1648 killagreg 198
                        }
199
                        else
200
                        {
1666 killagreg 201
                                Motor[motor_write].ReadMode = BL_READMODE_STATUS; // normal status request
1648 killagreg 202
                        }
1662 killagreg 203
                        // send read mode and the lower bits of setpoint
1666 killagreg 204
                I2C_WriteByte((Motor[motor_write].ReadMode<<3)|(Motor[motor_write].SetPointLowerBits & 0x07));
1662 killagreg 205
                        // configuration tranmission request?
206
                        if((0x0001<<motor_write) & BLConfig_WriteMask)
207
                        {       // redirect tx pointer to configuration data
208
                                pBuff = (uint8_t*)&BLConfig; // select config for motor
209
                                BuffLen = sizeof(BLConfig_t);
1651 killagreg 210
                        }
1662 killagreg 211
                        else
212
                        {       // jump to end of transmission for that motor
213
                                twi_state = 4;
1648 killagreg 214
                        }
215
                        break;
1662 killagreg 216
                case 3: // send configuration
217
                        I2C_WriteByte(*pBuff);
218
                        pBuff++;
219
                        if(--BuffLen > 0) twi_state = 3; // if there are some bytes left
220
                        break;
221
        case 4: // repeat case 0-4 for all motors
222
                        if(TWSR == TW_MT_DATA_NACK) // Data transmitted, NACK received
1648 killagreg 223
                        {
1662 killagreg 224
                                if(!missing_motor) missing_motor = motor_write + 1;
225
                                if((Motor[motor_write].State & MOTOR_STATE_ERROR_MASK) < MOTOR_STATE_ERROR_MASK) Motor[motor_write].State++; // increment error counter and handle overflow
1648 killagreg 226
                        }
1662 killagreg 227
                        I2C_Stop(TWI_STATE_MOTOR_TX);
1648 killagreg 228
                        I2CTimeout = 10;
1662 killagreg 229
                        motor_write++; // next motor
230
                        I2C_Start(TWI_STATE_MOTOR_TX); // Repeated start -> switch slave or switch Master Transmit -> Master Receive
1648 killagreg 231
                        break;
1662 killagreg 232
       // Master Receive Data
233
        case 5: // TWI_STATE_MOTOR_RX
234
                        if(TWSR != TW_MR_SLA_ACK) //  SLA+R transmitted but no ACK received
235
                        {       // no response from the addressed slave received
236
                                Motor[motor_read].State &= ~MOTOR_STATE_PRESENT_MASK; // clear present bit
237
                                if(++motor_read >= MAX_MOTORS)
238
                                {       // all motors read
239
                                        motor_read = 0;                 // restart from beginning
240
                                        BLConfig_ReadMask = 0;  // reset read configuration bitmask
241
                                        if(++motor_read_temperature >= MAX_MOTORS)
1683 killagreg 242
                                        {
1662 killagreg 243
                                                motor_read_temperature = 0;
1648 killagreg 244
                                                BLFlags &= ~BLFLAG_READ_VERSION;
245
                                        }
246
                                }
247
                                BLFlags |= BLFLAG_TX_COMPLETE;
1662 killagreg 248
                                I2C_Stop(TWI_STATE_MOTOR_TX);
1744 holgerb 249
                                I2C_TransferActive = 0;
1648 killagreg 250
                        }
251
                        else
1662 killagreg 252
                        {       // motor successfully addressed
253
                                Motor[motor_read].State |= MOTOR_STATE_PRESENT_MASK; // set present bit
254
                                if(Motor[motor_read].Version & MOTOR_STATE_NEW_PROTOCOL_MASK)
1648 killagreg 255
                                {
1662 killagreg 256
                                        // new BL found
1666 killagreg 257
                                        switch(Motor[motor_read].ReadMode)
1662 killagreg 258
                                        {
1666 killagreg 259
                                                case BL_READMODE_CONFIG:
1662 killagreg 260
                                                        pBuff = (uint8_t*)&BLConfig;
261
                                                        BuffLen = sizeof(BLConfig_t);
2370 holgerb 262
                                                        Motor[motor_read].ReadMode = BL_READMODE_STATUS; // only once
1662 killagreg 263
                                                        break;
1666 killagreg 264
                                                case BL_READMODE_STATUS:
1662 killagreg 265
                                                        pBuff = (uint8_t*)&(Motor[motor_read].Current);
266
                                                        if(motor_read == motor_read_temperature) BuffLen = 3; // read Current, MaxPwm & Temp
267
                                                        else BuffLen = 1;// read Current only
268
                                                        break;
269
                                        }
1648 killagreg 270
                                }
1662 killagreg 271
                                else // old BL version
272
                                {
273
                                        pBuff = (uint8_t*)&(Motor[motor_read].Current);
1672 killagreg 274
                                        if((BLFlags & BLFLAG_READ_VERSION) || (motor_read == motor_read_temperature)) BuffLen = 2; // Current & MaxPwm
1662 killagreg 275
                                        else BuffLen = 1; // read Current only
276
                                }
277
                                if(BuffLen == 1)
278
                                {
279
                                        I2C_ReceiveLastByte();  // read last byte
280
                                }
1638 holgerb 281
                                else
1648 killagreg 282
                                {
1662 killagreg 283
                                        I2C_ReceiveByte();              // read next byte
1642 killagreg 284
                                }
1648 killagreg 285
                        }
286
                        MissingMotor = missing_motor;
287
                        missing_motor = 0;
288
                        break;
1662 killagreg 289
                case 6: // receive bytes
290
                        *pBuff = TWDR;
291
                        pBuff++;
292
                        BuffLen--;
293
                        if(BuffLen>1)
294
                        {
295
                                I2C_ReceiveByte(); // read next byte
296
                        }
297
                        else if (BuffLen == 1)
298
                        {
299
                                I2C_ReceiveLastByte();  // read last byte
300
                        }
301
                        else // nothing left
302
                        {
303
                                if(BLFlags & BLFLAG_READ_VERSION)
1648 killagreg 304
                                {
2380 holgerb 305
//                                      if(!(FC_StatusFlags & FC_STATUS_MOTOR_RUN) && ((Motor[motor_read].MaxPWM & 252) == 248)) Motor[motor_read].Version |= MOTOR_STATE_NEW_PROTOCOL_MASK;
306
//                                      else Motor[motor_read].Version = 0;
307
                                        if(!(FC_StatusFlags & FC_STATUS_MOTOR_RUN))
308
                     {
309
                                           if((Motor[motor_read].MaxPWM & 252) == 248) Motor[motor_read].Version |= MOTOR_STATE_NEW_PROTOCOL_MASK;
310
                                           else Motor[motor_read].Version = 0;
2386 holgerb 311
                       if(Motor[motor_read].MaxPWM == 248) Motor[motor_read].Version |= (MOTOR_STATE_FAST_MODE | MOTOR_STATE_BL30);
312
                                           else
313
                       if(Motor[motor_read].MaxPWM == 249) Motor[motor_read].Version |= MOTOR_STATE_BL30;
2380 holgerb 314
                                         }  
1648 killagreg 315
                                }
1662 killagreg 316
                                if(++motor_read >= MAX_MOTORS)
1648 killagreg 317
                                {
1662 killagreg 318
                                        motor_read = 0;                 // restart from beginning
319
                                        BLConfig_ReadMask = 0;  // reset read configuration bitmask
320
                                        if(++motor_read_temperature >= MAX_MOTORS)
1648 killagreg 321
                                        {
1662 killagreg 322
                                                motor_read_temperature = 0;
323
                                                BLFlags &= ~BLFLAG_READ_VERSION;
1648 killagreg 324
                                        }
325
                                }
1662 killagreg 326
                                I2C_Stop(TWI_STATE_MOTOR_TX);
327
                                BLFlags |= BLFLAG_TX_COMPLETE;
1744 holgerb 328
                I2C_TransferActive = 0;
1662 killagreg 329
                                return;
330
                        }
331
                        twi_state = 6; // if there are some bytes left
332
                        break;
333
 
334
                // writing Gyro-Offsets
335
                case 18:
336
                        I2C_WriteByte(0x98); // Address the DAC
337
                        break;
338
 
339
                case 19:
340
                        I2C_WriteByte(0x10 + (dac_channel * 2)); // Select DAC Channel (0x10 = A, 0x12 = B, 0x14 = C)
341
                        break;
342
 
343
                case 20:
344
                        switch(dac_channel)
345
                        {
346
                                case 0:
347
                                                I2C_WriteByte(AnalogOffsetNick); // 1st byte for Channel A
348
                                                break;
349
                                case 1:
350
                                                I2C_WriteByte(AnalogOffsetRoll); // 1st byte for Channel B
351
                                                break;
352
                                case 2:
353
                                                I2C_WriteByte(AnalogOffsetGier); // 1st byte for Channel C
354
                                                break;
355
                        }
356
                        break;
357
 
358
                case 21:
359
                        I2C_WriteByte(0x80); // 2nd byte for all channels is 0x80
360
                        break;
361
 
362
                case 22:
363
                        I2C_Stop(TWI_STATE_MOTOR_TX);
1744 holgerb 364
                        I2C_TransferActive = 0;
1662 killagreg 365
                        I2CTimeout = 10;
1665 killagreg 366
                        // repeat case 18...22 until all DAC Channels are updated
1662 killagreg 367
                        if(dac_channel < 2)
368
                        {
369
                                dac_channel ++;         // jump to next channel
370
                                I2C_Start(TWI_STATE_GYRO_OFFSET_TX);            // start transmission for next channel
371
                        }
372
                        else
1665 killagreg 373
                        {
1662 killagreg 374
                                dac_channel = 0; // reset dac channel counter
1665 killagreg 375
                                BLFlags |= BLFLAG_TX_COMPLETE;
1662 killagreg 376
                        }
377
                        break;
378
        default:
379
                        I2C_Stop(TWI_STATE_MOTOR_TX);
380
                        BLFlags |= BLFLAG_TX_COMPLETE;
381
                        I2CTimeout = 10;
382
                        motor_write = 0;
383
                        motor_read = 0;
1744 holgerb 384
                        I2C_TransferActive = 0;
1662 killagreg 385
                        break;
1648 killagreg 386
        }
1662 killagreg 387
 
1638 holgerb 388
}
1639 holgerb 389
 
1662 killagreg 390
 
391
uint8_t I2C_WriteBLConfig(uint8_t motor)
1648 killagreg 392
{
1662 killagreg 393
        uint8_t i;
1683 killagreg 394
        uint16_t timer;
1662 killagreg 395
 
1665 killagreg 396
        if(MotorenEin || PC_MotortestActive) return(BLCONFIG_ERR_MOTOR_RUNNING);        // not when motors are running!
397
        if(motor > MAX_MOTORS) return (BLCONFIG_ERR_MOTOR_NOT_EXIST);                   // motor does not exist!
1662 killagreg 398
        if(motor)
399
        {
1665 killagreg 400
                if(!(Motor[motor-1].State & MOTOR_STATE_PRESENT_MASK)) return(BLCONFIG_ERR_MOTOR_NOT_EXIST); // motor does not exist!
401
                if(!(Motor[motor-1].Version & MOTOR_STATE_NEW_PROTOCOL_MASK)) return(BLCONFIG_ERR_HW_NOT_COMPATIBLE); // not a new BL!
1662 killagreg 402
        }
403
        // check BL configuration to send
2370 holgerb 404
        if((BLConfig.Revision & 0x0B) != BLCONFIG_REVISION) return (BLCONFIG_ERR_SW_NOT_COMPATIBLE); // bad revison
1662 killagreg 405
        i = RAM_Checksum((uint8_t*)&BLConfig, sizeof(BLConfig_t) - 1);
1665 killagreg 406
        if(i != BLConfig.crc) return(BLCONFIG_ERR_CHECKSUM); // bad checksum
1662 killagreg 407
 
1683 killagreg 408
        timer = SetDelay(2000);
409
        while(!(BLFlags & BLFLAG_TX_COMPLETE) && !CheckDelay(timer));   //wait for complete transfer
1662 killagreg 410
 
411
        // prepare the bitmask
412
        if(!motor) // 0 means all
413
        {
414
                BLConfig_WriteMask = 0xFF; // all motors at once with the same configuration
415
        }
416
        else //only one specific motor
417
        {
418
                BLConfig_WriteMask = 0x0001<<(motor-1);
419
        }
1648 killagreg 420
        for(i = 0; i < MAX_MOTORS; i++)
421
        {
1662 killagreg 422
                if((0x0001<<i) & BLConfig_WriteMask)
423
                {
424
                        Motor[i].SetPoint = 0;
425
                        Motor[i].SetPointLowerBits = 0;
426
                }
1648 killagreg 427
        }
1665 killagreg 428
 
1662 killagreg 429
        motor_write = 0;
1648 killagreg 430
        // needs at least MAX_MOTORS loops of 2 ms (12*2ms = 24ms)
431
        do
432
        {
1662 killagreg 433
                I2C_Start(TWI_STATE_MOTOR_TX); // start an i2c transmission
1683 killagreg 434
                while(!(BLFlags & BLFLAG_TX_COMPLETE)  && !CheckDelay(timer)); //wait for complete transfer
435
        }while(BLConfig_WriteMask  && !CheckDelay(timer)); // repeat until the BL config has been sent
436
        if(BLConfig_WriteMask) return(BLCONFIG_ERR_MOTOR_NOT_EXIST);
1665 killagreg 437
        return(BLCONFIG_SUCCESS);
1648 killagreg 438
}
439
 
1662 killagreg 440
uint8_t I2C_ReadBLConfig(uint8_t motor)
441
{
442
        uint8_t i;
1683 killagreg 443
        uint16_t timer;
1648 killagreg 444
 
1665 killagreg 445
        if(MotorenEin || PC_MotortestActive) return(BLCONFIG_ERR_MOTOR_RUNNING); // not when motors are running!
1673 killagreg 446
        if(motor > MAX_MOTORS) return (BLCONFIG_ERR_MOTOR_NOT_EXIST);           // motor does not exist!
447
        if(motor == 0) return (BLCONFIG_ERR_READ_NOT_POSSIBLE);
1665 killagreg 448
        if(!(Motor[motor-1].State & MOTOR_STATE_PRESENT_MASK)) return(BLCONFIG_ERR_MOTOR_NOT_EXIST); // motor does not exist!
449
        if(!(Motor[motor-1].Version & MOTOR_STATE_NEW_PROTOCOL_MASK)) return(BLCONFIG_ERR_HW_NOT_COMPATIBLE); // not a new BL!
450
 
1683 killagreg 451
        timer = SetDelay(2000);
452
        while(!(BLFlags & BLFLAG_TX_COMPLETE) && !CheckDelay(timer));                           //wait for complete transfer
1648 killagreg 453
 
1662 killagreg 454
        // prepare the bitmask
455
        BLConfig_ReadMask = 0x0001<<(motor-1);
1665 killagreg 456
 
1662 killagreg 457
        for(i = 0; i < MAX_MOTORS; i++)
458
        {
459
                if((0x0001<<i) & BLConfig_ReadMask)
460
                {
461
                        Motor[i].SetPoint = 0;
462
                        Motor[i].SetPointLowerBits = 0;
463
                }
464
        }
1665 killagreg 465
 
1662 killagreg 466
        motor_read = 0;
467
        BLConfig.Revision = 0; // bad revision
468
        BLConfig.crc = 0;          // bad checksum
469
        // needs at least MAX_MOTORS loops of 2 ms (12*2ms = 24ms)
470
        do
471
        {
472
                I2C_Start(TWI_STATE_MOTOR_TX); // start an i2c transmission
1683 killagreg 473
                while(!(BLFlags & BLFLAG_TX_COMPLETE) && !CheckDelay(timer)); //wait for complete transfer
474
        }while(BLConfig_ReadMask && !CheckDelay(timer)); // repeat until the BL config has been received from all motors
1662 killagreg 475
        // validate result
2370 holgerb 476
        if((BLConfig.Revision & 0x0B) != BLCONFIG_REVISION) return (BLCONFIG_ERR_SW_NOT_COMPATIBLE); // bad revison
1662 killagreg 477
        i = RAM_Checksum((uint8_t*)&BLConfig, sizeof(BLConfig_t) - 1);
1665 killagreg 478
        if(i != BLConfig.crc) return(BLCONFIG_ERR_CHECKSUM); // bad checksum
479
        return(BLCONFIG_SUCCESS);
1662 killagreg 480
}
1665 killagreg 481