Subversion Repositories FlightCtrl

Rev

Rev 1964 | Rev 1975 | Go to most recent revision | Only display areas with differences | Ignore whitespace | Details | Blame | Last modification | View Log | RSS feed

Rev 1964 Rev 1969
1
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2
// + Copyright (c) 04.2007 Holger Buss
2
// + Copyright (c) 04.2007 Holger Buss
3
// + Nur für den privaten Gebrauch
3
// + Nur für den privaten Gebrauch
4
// + www.MikroKopter.com
4
// + www.MikroKopter.com
5
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
5
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
6
// + Es gilt für das gesamte Projekt (Hardware, Software, Binärfiles, Sourcecode und Dokumentation),
6
// + Es gilt für das gesamte Projekt (Hardware, Software, Binärfiles, Sourcecode und Dokumentation),
7
// + dass eine Nutzung (auch auszugsweise) nur f�r den privaten und nicht-kommerziellen Gebrauch zulässig ist.
7
// + dass eine Nutzung (auch auszugsweise) nur f�r den privaten und nicht-kommerziellen Gebrauch zulässig ist.
8
// + Sollten direkte oder indirekte kommerzielle Absichten verfolgt werden, ist mit uns (info@mikrokopter.de) Kontakt
8
// + Sollten direkte oder indirekte kommerzielle Absichten verfolgt werden, ist mit uns (info@mikrokopter.de) Kontakt
9
// + bzgl. der Nutzungsbedingungen aufzunehmen.
9
// + bzgl. der Nutzungsbedingungen aufzunehmen.
10
// + Eine kommerzielle Nutzung ist z.B.Verkauf von MikroKoptern, Bestückung und Verkauf von Platinen oder Bausätzen,
10
// + Eine kommerzielle Nutzung ist z.B.Verkauf von MikroKoptern, Bestückung und Verkauf von Platinen oder Bausätzen,
11
// + Verkauf von Luftbildaufnahmen, usw.
11
// + Verkauf von Luftbildaufnahmen, usw.
12
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
12
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
13
// + Werden Teile des Quellcodes (mit oder ohne Modifikation) weiterverwendet oder veröffentlicht,
13
// + Werden Teile des Quellcodes (mit oder ohne Modifikation) weiterverwendet oder veröffentlicht,
14
// + unterliegen sie auch diesen Nutzungsbedingungen und diese Nutzungsbedingungen incl. Copyright müssen dann beiliegen
14
// + unterliegen sie auch diesen Nutzungsbedingungen und diese Nutzungsbedingungen incl. Copyright müssen dann beiliegen
15
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
15
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
16
// + Sollte die Software (auch auszugesweise) oder sonstige Informationen des MikroKopter-Projekts
16
// + Sollte die Software (auch auszugesweise) oder sonstige Informationen des MikroKopter-Projekts
17
// + auf anderen Webseiten oder Medien veröffentlicht werden, muss unsere Webseite "http://www.mikrokopter.de"
17
// + auf anderen Webseiten oder Medien veröffentlicht werden, muss unsere Webseite "http://www.mikrokopter.de"
18
// + eindeutig als Ursprung verlinkt und genannt werden
18
// + eindeutig als Ursprung verlinkt und genannt werden
19
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
19
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
20
// + Keine Gewähr auf Fehlerfreiheit, Vollständigkeit oder Funktion
20
// + Keine Gewähr auf Fehlerfreiheit, Vollständigkeit oder Funktion
21
// + Benutzung auf eigene Gefahr
21
// + Benutzung auf eigene Gefahr
22
// + Wir übernehmen keinerlei Haftung für direkte oder indirekte Personen- oder Sachschäden
22
// + Wir übernehmen keinerlei Haftung für direkte oder indirekte Personen- oder Sachschäden
23
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
23
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
24
// + Die Portierung der Software (oder Teile davon) auf andere Systeme (ausser der Hardware von www.mikrokopter.de) ist nur
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
25
// + mit unserer Zustimmung zulässig
26
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
26
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
27
// + Die Funktion printf_P() unterliegt ihrer eigenen Lizenz und ist hiervon nicht betroffen
27
// + Die Funktion printf_P() unterliegt ihrer eigenen Lizenz und ist hiervon nicht betroffen
28
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
28
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
29
// + Redistributions of source code (with or without modifications) must retain the above copyright notice,
29
// + Redistributions of source code (with or without modifications) must retain the above copyright notice,
30
// + this list of conditions and the following disclaimer.
30
// + 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
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.
32
// +     from this software without specific prior written permission.
33
// +   * The use of this project (hardware, software, binary files, sources and documentation) is only permittet
33
// +   * The use of this project (hardware, software, binary files, sources and documentation) is only permittet
34
// +     for non-commercial use (directly or indirectly)
34
// +     for non-commercial use (directly or indirectly)
35
// +     Commercial use (for example: selling of MikroKopters, selling of PCBs, assembly, ...) is only permitted
35
// +     Commercial use (for example: selling of MikroKopters, selling of PCBs, assembly, ...) is only permitted
36
// +     with our written permission
36
// +     with our written permission
37
// +   * If sources or documentations are redistributet on other webpages, out webpage (http://www.MikroKopter.de) must be
37
// +   * If sources or documentations are redistributet on other webpages, out webpage (http://www.MikroKopter.de) must be
38
// +     clearly linked as origin
38
// +     clearly linked as origin
39
// +   * porting to systems other than hardware from www.mikrokopter.de is not allowed
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"
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
41
// +  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42
// +  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
42
// +  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
43
// +  ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
43
// +  ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
44
// +  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
44
// +  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
45
// +  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
45
// +  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
46
// +  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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
47
// +  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
48
// +  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
48
// +  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49
// +  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
49
// +  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
50
// +  POSSIBILITY OF SUCH DAMAGE.
50
// +  POSSIBILITY OF SUCH DAMAGE.
51
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
51
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
52
 
52
 
53
#include <avr/boot.h>
53
#include <avr/boot.h>
54
#include <avr/io.h>
54
#include <avr/io.h>
55
#include <avr/interrupt.h>
55
#include <avr/interrupt.h>
56
#include <util/delay.h>
56
#include <util/delay.h>
57
 
57
 
58
#include "timer0.h"
58
#include "timer0.h"
59
#include "timer2.h"
59
#include "timer2.h"
60
#include "uart0.h"
60
#include "uart0.h"
61
#include "uart1.h"
61
#include "uart1.h"
62
#include "output.h"
62
#include "output.h"
63
#include "menu.h"
63
#include "menu.h"
64
#include "attitude.h"
64
#include "attitude.h"
65
#include "flight.h"
65
#include "flight.h"
66
#include "rc.h"
66
#include "rc.h"
67
#include "analog.h"
67
#include "analog.h"
68
#include "configuration.h"
68
#include "configuration.h"
69
#include "printf_P.h"
69
#include "printf_P.h"
70
#include "twimaster.h"
70
#include "twimaster.h"
-
 
71
#include "controlMixer.h"
71
#ifdef USE_NAVICTRL
72
#ifdef USE_NAVICTRL
72
#include "spi.h"
73
#include "spi.h"
73
#endif
74
#endif
74
#ifdef USE_MK3MAG
75
#ifdef USE_MK3MAG
75
#include "mk3mag.h"
76
#include "mk3mag.h"
76
#endif
77
#endif
77
#include "eeprom.h"
78
#include "eeprom.h"
78
 
79
 
79
int16_t main(void) {
80
int16_t main(void) {
80
  uint16_t timer;
81
  uint16_t timer;
81
 
82
 
82
  // disable interrupts global
83
  // disable interrupts global
83
  cli();
84
  cli();
84
 
85
 
85
  // analyze hardware environment
86
  // analyze hardware environment
86
  CPUType = getCPUType();
87
  CPUType = getCPUType();
87
  boardRelease = getBoardRelease();
88
  boardRelease = getBoardRelease();
88
 
89
 
89
  // disable watchdog
90
  // disable watchdog
90
  MCUSR &= ~(1 << WDRF);
91
  MCUSR &= ~(1 << WDRF);
91
  WDTCSR |= (1 << WDCE) | (1 << WDE);
92
  WDTCSR |= (1 << WDCE) | (1 << WDE);
92
  WDTCSR = 0;
93
  WDTCSR = 0;
-
 
94
 
-
 
95
// This is strange: It should NOT be necessarty to do. But the call of the same,
-
 
96
// in channelMap_readOrDefault (if eeprom read fails) just sets all to 0,0,0,....
-
 
97
channelMap_default();
93
 
98
 
94
  // initalize modules
99
  // initalize modules
95
  output_init();
100
  output_init();
96
  timer0_init();
101
  timer0_init();
97
  timer2_init();
102
  timer2_init();
98
  usart0_Init();
103
  usart0_Init();
99
  if (CPUType == ATMEGA644P);// usart1_Init();
104
  if (CPUType == ATMEGA644P);// usart1_Init();
100
  RC_Init();
105
  RC_Init();
101
  analog_init();
106
  analog_init();
102
  I2C_init();
107
  I2C_init();
103
#ifdef USE_NAVICTRL
108
#ifdef USE_NAVICTRL
104
  SPI_MasterInit();
109
  SPI_MasterInit();
105
#endif
110
#endif
106
#ifdef USE_MK3MAG
111
#ifdef USE_MK3MAG
107
  MK3MAG_Init();
112
  MK3MAG_Init();
108
#endif
113
#endif
-
 
114
 
-
 
115
  // Parameter Set handling
-
 
116
  channelMap_readOrDefault();
-
 
117
  mixerMatrix_readOrDefault();
-
 
118
  paramSet_readOrDefault();
109
 
119
 
110
  // enable interrupts global
120
  // enable interrupts global
111
  sei();
121
  sei();
112
 
122
 
113
  printf("\n\r===================================");
123
  printf("\n\r===================================");
114
  printf("\n\rFlightControl");
124
  printf("\n\rFlightControl");
115
  printf("\n\rHardware: Custom");
125
  printf("\n\rHardware: Custom");
116
  printf("\n\r     CPU: Atmega644");
126
  printf("\n\r     CPU: Atmega644");
117
  if (CPUType == ATMEGA644P)
127
  if (CPUType == ATMEGA644P)
118
    printf("p");
128
    printf("p");
119
  printf("\n\rSoftware: V%d.%d%c",VERSION_MAJOR, VERSION_MINOR, VERSION_PATCH + 'a');
129
  printf("\n\rSoftware: V%d.%d%c",VERSION_MAJOR, VERSION_MINOR, VERSION_PATCH + 'a');
120
  printf("\n\r===================================");
130
  printf("\n\r===================================");
121
 
-
 
122
  // Parameter Set handling
-
 
123
  channelMap_readOrDefault();
-
 
124
  mixerMatrix_readOrDefault();
-
 
125
  paramSet_readOrDefault();
-
 
126
 
131
 
127
  // Wait for a short time (otherwise the RC channel check won't work below)
132
  // Wait for a short time (otherwise the RC channel check won't work below)
128
  // timer = SetDelay(500);
133
  // timer = SetDelay(500);
129
  // while(!CheckDelay(timer));
134
  // while(!CheckDelay(timer));
130
 
135
 
131
  // Instead, while away the time by flashing the 2 outputs:
136
  // Instead, while away the time by flashing the 2 outputs:
132
  // First J16, then J17. Makes it easier to see which is which.
137
  // First J16, then J17. Makes it easier to see which is which.
133
  timer = setDelay(200);
138
  timer = setDelay(200);
134
  outputSet(0,1);
139
  outputSet(0,1);
135
  GRN_OFF;
140
  GRN_OFF;
136
  RED_ON;
141
  RED_ON;
137
  while (!checkDelay(timer))
142
  while (!checkDelay(timer))
138
    ;
143
    ;
139
 
144
 
140
  timer = setDelay(200);
145
  timer = setDelay(200);
141
  outputSet(0,0);
146
  outputSet(0,0);
142
  outputSet(1,1);
147
  outputSet(1,1);
143
  RED_OFF;
148
  RED_OFF;
144
  GRN_ON;
149
  GRN_ON;
145
  while (!checkDelay(timer))
150
  while (!checkDelay(timer))
146
    ;
151
    ;
147
 
152
 
148
  timer = setDelay(200);
153
  timer = setDelay(200);
149
  while (!checkDelay(timer))
154
  while (!checkDelay(timer))
150
    ;
155
    ;
151
  outputSet(1,0);
156
  outputSet(1,0);
152
  GRN_OFF;
157
  GRN_OFF;
153
 
158
 
154
  twi_diagnostics();
159
  twi_diagnostics();
155
 
160
 
156
  printf("\n\r===================================");
161
  printf("\n\r===================================");
157
 
162
 
158
#ifdef USE_NAVICTRL
163
#ifdef USE_NAVICTRL
159
  printf("\n\rSupport for NaviCtrl");
164
  printf("\n\rSupport for NaviCtrl");
160
#ifdef USE_RC_DSL
165
#ifdef USE_RC_DSL
161
  printf("\r\nSupport for DSL RC at 2nd UART");
166
  printf("\r\nSupport for DSL RC at 2nd UART");
162
#endif
167
#endif
163
#ifdef USE_RC_SPECTRUM
168
#ifdef USE_RC_SPECTRUM
164
  printf("\r\nSupport for SPECTRUM RC at 2nd UART");
169
  printf("\r\nSupport for SPECTRUM RC at 2nd UART");
165
#endif
170
#endif
166
#endif
171
#endif
167
 
172
 
168
#ifdef USE_MK3MAG
173
#ifdef USE_MK3MAG
169
  printf("\n\rSupport for MK3MAG Compass");
174
  printf("\n\rSupport for MK3MAG Compass");
170
#endif
175
#endif
171
 
176
 
172
#if (defined (USE_MK3MAG))
177
#if (defined (USE_MK3MAG))
173
  if(CPUType == ATMEGA644P) printf("\n\r2 UART");
178
  if(CPUType == ATMEGA644P) printf("\n\r2 UART");
174
  else printf("\n\r1 UART");
179
  else printf("\n\r1 UART");
175
#endif
180
#endif
176
 
181
 
177
  controlMixer_setNeutral();
182
  controlMixer_setNeutral();
178
 
183
 
179
  // Cal. attitude sensors and reset integrals.
184
  // Cal. attitude sensors and reset integrals.
180
  attitude_setNeutral();
185
  attitude_setNeutral();
181
 
186
 
182
  Servo_On();
187
  Servo_On();
183
 
188
 
184
  // Init flight parameters
189
  // Init flight parameters
185
  flight_setNeutral();
190
  flight_setNeutral();
186
 
191
 
187
  beep(2000);
192
  beep(2000);
188
 
193
 
189
  printf("\n\rControl: ");
194
  printf("\n\rControl: ");
190
  if (staticParams.bitConfig & CFG_HEADING_HOLD)
195
  if (staticParams.bitConfig & CFG_HEADING_HOLD)
191
    printf("HeadingHold");
196
    printf("HeadingHold");
192
    else printf("Neutral (ACC-Mode)");
197
    else printf("Neutral (ACC-Mode)");
193
 
198
 
194
  printf("\n\n\r");
199
  printf("\n\n\r");
195
 
200
 
196
  LCD_Clear();
201
  LCD_Clear();
197
 
202
 
198
  I2CTimeout = 5000;
203
  I2CTimeout = 5000;
199
 
204
 
200
  while (1) {
205
  while (1) {
201
    if (runFlightControl) { // control interval
206
    if (runFlightControl) { // control interval
202
      runFlightControl = 0; // reset Flag, is enabled every 2 ms by ISR of timer0
207
      runFlightControl = 0; // reset Flag, is enabled every 2 ms by ISR of timer0
203
      if (!analogDataReady) {
208
      if (!analogDataReady) {
204
        debugOut.digital[0] |= DEBUG_MAINLOOP_TIMER;
209
        debugOut.digital[0] |= DEBUG_MAINLOOP_TIMER;
205
      } else {
210
      } else {
206
        debugOut.digital[0] &= ~DEBUG_MAINLOOP_TIMER;
211
        debugOut.digital[0] &= ~DEBUG_MAINLOOP_TIMER;
207
 
212
 
208
        J4HIGH;
213
        J4HIGH;
209
        flight_control();
214
        flight_control();
210
        J4LOW;
215
        J4LOW;
211
 
216
 
212
        if (!--I2CTimeout || missingMotor) { // try to reset the i2c if motor is missing or timeout
217
        if (!--I2CTimeout || missingMotor) { // try to reset the i2c if motor is missing or timeout
213
          if (!I2CTimeout) {
218
          if (!I2CTimeout) {
214
            I2C_Reset();
219
            I2C_Reset();
215
            I2CTimeout = 5;
220
            I2CTimeout = 5;
216
          }
221
          }
217
        }
222
        }
218
       
223
       
219
        // Allow Serial Data Transmit if motors must not updated or motors are not running
224
        // Allow Serial Data Transmit if motors must not updated or motors are not running
220
        if (!runFlightControl || !(MKFlags & MKFLAG_MOTOR_RUN)) {
225
        if (!runFlightControl || !(MKFlags & MKFLAG_MOTOR_RUN)) {
221
          usart0_TransmitTxData();
226
          usart0_TransmitTxData();
222
        }
227
        }
223
 
228
 
224
        usart0_ProcessRxData();
229
        usart0_ProcessRxData();
225
 
230
 
226
        if (checkDelay(timer)) {
231
        if (checkDelay(timer)) {
227
          if (UBat <= UBAT_AT_5V) {
232
          if (UBat <= UBAT_AT_5V) {
228
            // Do nothing. The voltage on the input side of the regulator is <5V;
233
            // Do nothing. The voltage on the input side of the regulator is <5V;
229
            // we must be running off USB power. Keep it quiet.
234
            // we must be running off USB power. Keep it quiet.
230
          } else if (UBat < staticParams.batteryVoltageWarning) {
235
          } else if (UBat < staticParams.batteryVoltageWarning) {
231
            beepBatteryAlarm();
236
            beepBatteryAlarm();
232
          }
237
          }
233
 
238
 
234
#ifdef USE_NAVICTRL
239
#ifdef USE_NAVICTRL
235
          SPI_StartTransmitPacket();
240
          SPI_StartTransmitPacket();
236
          SendSPI = 4;
241
          SendSPI = 4;
237
#endif
242
#endif
238
          timer = setDelay(20); // every 20 ms
243
          timer = setDelay(20); // every 20 ms
239
        }
244
        }
240
        output_update();
245
        output_update();
241
      }
246
      }
242
 
247
 
243
#ifdef USE_NAVICTRL
248
#ifdef USE_NAVICTRL
244
      if(!SendSPI) {
249
      if(!SendSPI) {
245
        // SendSPI is decremented in timer0.c with a rate of 9.765 kHz.
250
        // SendSPI is decremented in timer0.c with a rate of 9.765 kHz.
246
        // within the SPI_TransmitByte() routine the value is set to 4.
251
        // within the SPI_TransmitByte() routine the value is set to 4.
247
        // I.e. the SPI_TransmitByte() is called at a rate of 9.765 kHz/4= 2441.25 Hz,
252
        // I.e. the SPI_TransmitByte() is called at a rate of 9.765 kHz/4= 2441.25 Hz,
248
        // and therefore the time of transmission of a complete spi-packet (32 bytes) is 32*4/9.765 kHz = 13.1 ms.
253
        // and therefore the time of transmission of a complete spi-packet (32 bytes) is 32*4/9.765 kHz = 13.1 ms.
249
        SPI_TransmitByte();
254
        SPI_TransmitByte();
250
      }
255
      }
251
#endif
256
#endif
252
    }
257
    }
253
  }
258
  }
254
  return (1);
259
  return (1);
255
}
260
}
256
 
261