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1227 | killagreg | 1 | // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
2 | // + Copyright (c) 04.2007 Holger Buss |
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3 | // + Nur für den privaten Gebrauch |
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4 | // + www.MikroKopter.com |
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5 | // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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6 | // + Es gilt für das gesamte Projekt (Hardware, Software, Binärfiles, Sourcecode und Dokumentation), |
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7 | // + dass eine Nutzung (auch auszugsweise) nur für den privaten (nicht-kommerziellen) Gebrauch zulässig ist. |
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8 | // + Sollten direkte oder indirekte kommerzielle Absichten verfolgt werden, ist mit uns (info@mikrokopter.de) Kontakt |
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9 | // + bzgl. der Nutzungsbedingungen aufzunehmen. |
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10 | // + Eine kommerzielle Nutzung ist z.B.Verkauf von MikroKoptern, Bestückung und Verkauf von Platinen oder Bausätzen, |
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11 | // + Verkauf von Luftbildaufnahmen, usw. |
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12 | // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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13 | // + Werden Teile des Quellcodes (mit oder ohne Modifikation) weiterverwendet oder veröffentlicht, |
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14 | // + unterliegen sie auch diesen Nutzungsbedingungen und diese Nutzungsbedingungen incl. Copyright müssen dann beiliegen |
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15 | // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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16 | // + Sollte die Software (auch auszugesweise) oder sonstige Informationen des MikroKopter-Projekts |
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17 | // + auf anderen Webseiten oder sonstigen Medien veröffentlicht werden, muss unsere Webseite "http://www.mikrokopter.de" |
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18 | // + eindeutig als Ursprung verlinkt werden |
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19 | // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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20 | // + Keine Gewähr auf Fehlerfreiheit, Vollständigkeit oder Funktion |
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21 | // + Benutzung auf eigene Gefahr |
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22 | // + Wir übernehmen keinerlei Haftung für direkte oder indirekte Personen- oder Sachschäden |
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23 | // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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24 | // + Die Portierung der Software (oder Teile davon) auf andere Systeme (ausser der Hardware von www.mikrokopter.de) ist nur |
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25 | // + mit unserer Zustimmung zulässig |
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26 | // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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27 | // + Die Funktion printf_P() unterliegt ihrer eigenen Lizenz und ist hiervon nicht betroffen |
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28 | // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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29 | // + Redistributions of source code (with or without modifications) must retain the above copyright notice, |
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30 | // + this list of conditions and the following disclaimer. |
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31 | // + * Neither the name of the copyright holders nor the names of contributors may be used to endorse or promote products derived |
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32 | // + from this software without specific prior written permission. |
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33 | // + * The use of this project (hardware, software, binary files, sources and documentation) is only permittet |
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34 | // + for non-commercial use (directly or indirectly) |
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35 | // + Commercial use (for excample: selling of MikroKopters, selling of PCBs, assembly, ...) is only permitted |
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36 | // + with our written permission |
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37 | // + * If sources or documentations are redistributet on other webpages, out webpage (http://www.MikroKopter.de) must be |
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38 | // + clearly linked as origin |
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39 | // + * porting to systems other than hardware from www.mikrokopter.de is not allowed |
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40 | // + THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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41 | // + AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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42 | // + IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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43 | // + ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
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44 | // + LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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45 | // + CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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46 | // + SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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47 | // + INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN// + CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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48 | // + ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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49 | // + POSSIBILITY OF SUCH DAMAGE. |
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50 | // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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51 | #include <avr/io.h> |
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52 | #include <avr/interrupt.h> |
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53 | #include "fc.h" |
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54 | #include "eeprom.h" |
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55 | #include "uart0.h" |
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56 | #include "main.h" |
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57 | #include "rc.h" |
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58 | |||
59 | volatile int16_t ServoNickValue = 0; |
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60 | volatile int16_t ServoRollValue = 0; |
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61 | volatile uint8_t ServoActive = 0; |
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62 | |||
63 | #define HEF4017R_ON PORTC |= (1<<PORTC6) |
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64 | #define HEF4017R_OFF PORTC &= ~(1<<PORTC6) |
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65 | |||
66 | |||
67 | /*****************************************************/ |
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68 | /* Initialize Timer 2 */ |
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69 | /*****************************************************/ |
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70 | // The timer 2 is used to generate the PWM at PD7 (J7) |
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71 | // to control a camera servo for nick compensation. |
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72 | void TIMER2_Init(void) |
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73 | { |
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74 | uint8_t sreg = SREG; |
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75 | |||
76 | // disable all interrupts before reconfiguration |
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77 | cli(); |
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78 | |||
79 | // set PD7 as output of the PWM for nick servo |
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80 | DDRD |= (1<<DDD7); |
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81 | PORTD &= ~(1<<PORTD7); // set PD7 to low |
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82 | |||
83 | DDRC |= (1<<DDC6); // set PC6 as output (Reset for HEF4017) |
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84 | //PORTC &= ~(1<<PORTC6); // set PC6 to low |
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85 | HEF4017R_ON; // enable reset |
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86 | |||
87 | // Timer/Counter 2 Control Register A |
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88 | |||
89 | // Timer Mode is FastPWM with timer reload at OCR2A (Bits: WGM22 = 1, WGM21 = 1, WGM20 = 1) |
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90 | // PD7: Normal port operation, OC2A disconnected, (Bits: COM2A1 = 0, COM2A0 = 0) |
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91 | // PD6: Normal port operation, OC2B disconnected, (Bits: COM2B1 = 0, COM2B0 = 0) |
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92 | TCCR2A &= ~((1<<COM2A1)|(1<<COM2A0)|(1<<COM2B1)|(1<<COM2B0)); |
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93 | TCCR2A |= (1<<WGM21)|(1<<WGM20); |
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94 | |||
95 | // Timer/Counter 2 Control Register B |
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96 | |||
97 | // Set clock divider for timer 2 to SYSKLOCK/32 = 20MHz / 32 = 625 kHz |
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98 | // The timer increments from 0x00 to 0xFF with an update rate of 625 kHz or 1.6 us |
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99 | // hence the timer overflow interrupt frequency is 625 kHz / 256 = 2.44 kHz or 0.4096 ms |
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100 | |||
101 | // divider 32 (Bits: CS022 = 0, CS21 = 1, CS20 = 1) |
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102 | TCCR2B &= ~((1<<FOC2A)|(1<<FOC2B)|(1<<CS22)); |
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103 | TCCR2B |= (1<<CS21)|(1<<CS20)|(1<<WGM22); |
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104 | |||
105 | // Initialize the Timer/Counter 2 Register |
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106 | TCNT2 = 0; |
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107 | |||
108 | // Initialize the Output Compare Register A used for PWM generation on port PD7. |
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109 | OCR2A = 255; |
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110 | TCCR2A |= (1<<COM2A1); // set or clear at compare match depends on value of COM2A0 |
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111 | |||
112 | // Timer/Counter 2 Interrupt Mask Register |
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113 | // Enable timer output compare match A Interrupt only |
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114 | TIMSK2 &= ~((1<<OCIE2B)|(1<<TOIE2)); |
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115 | TIMSK2 |= (1<<OCIE2A); |
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116 | |||
117 | SREG = sreg; |
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118 | } |
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119 | |||
120 | |||
121 | void Servo_On(void) |
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122 | { |
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123 | ServoActive = 1; |
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124 | } |
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125 | |||
126 | void Servo_Off(void) |
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127 | { |
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128 | ServoActive = 0; |
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129 | HEF4017R_ON; // enable reset |
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130 | } |
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131 | |||
132 | /*****************************************************/ |
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133 | /* Control Servo Position */ |
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134 | /*****************************************************/ |
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135 | |||
136 | ISR(TIMER2_COMPA_vect) |
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137 | { |
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138 | |||
139 | // frame len 22.5 ms = 14063 * 1.6 us |
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140 | // stop pulse: 0.3 ms = 188 * 1.6 us |
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141 | // min servo pulse: 0.6 ms = 375 * 1.6 us |
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142 | // max servo pulse: 2.4 ms = 1500 * 1.6 us |
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143 | // resolution: 1500 - 375 = 1125 steps |
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144 | |||
145 | #define IRS_RUNTIME 127 |
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146 | #define PPM_STOPPULSE 188 |
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147 | //#define PPM_FRAMELEN 14063 |
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148 | #define PPM_FRAMELEN (1757 * ParamSet.ServoRefresh) // 22.5 ms / 8 Channels = 2.8125ms per Servo Channel |
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149 | #define MINSERVOPULSE 375 |
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150 | #define MAXSERVOPULSE 1500 |
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151 | #define SERVORANGE (MAXSERVOPULSE - MINSERVOPULSE) |
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152 | |||
153 | static uint8_t PulseOutput = 0; |
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154 | static uint16_t RemainingPulse = 0; |
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155 | static uint16_t ServoFrameTime = 0; |
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156 | static uint8_t ServoIndex = 0; |
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157 | |||
158 | #define MULTIPLYER 4 |
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159 | static int16_t ServoNickOffset = (255 / 2) * MULTIPLYER; // initial value near center position |
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160 | static int16_t ServoRollOffset = (255 / 2) * MULTIPLYER; // initial value near center position |
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161 | |||
162 | if(BoardRelease < 20) |
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163 | { |
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164 | //--------------------------- |
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165 | // Nick servo state machine |
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166 | //--------------------------- |
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167 | if(!PulseOutput) // pulse output complete |
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168 | { |
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169 | if(TCCR2A & (1<<COM2A0)) // we had a low pulse |
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170 | { |
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171 | TCCR2A &= ~(1<<COM2A0);// make a high pulse |
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172 | RemainingPulse = MINSERVOPULSE + SERVORANGE/2; // center position ~ 1.5ms |
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173 | |||
174 | ServoNickOffset = (ServoNickOffset * 3 + (int16_t)FCParam.ServoNickControl * MULTIPLYER) / 4; // lowpass offset |
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175 | ServoNickValue = ServoNickOffset; // offset (Range from 0 to 255 * 3 = 765) |
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176 | if(ParamSet.ServoNickCompInvert & 0x01) |
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177 | { // inverting movement of servo |
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178 | ServoNickValue += (int16_t)( ( (int32_t)ParamSet.ServoNickComp * MULTIPLYER * (IntegralGyroNick / 128L ) ) / (256L) ); |
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179 | } |
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180 | else |
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181 | { // non inverting movement of servo |
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182 | ServoNickValue -= (int16_t)( ( (int32_t)ParamSet.ServoNickComp * MULTIPLYER * (IntegralGyroNick / 128L ) ) / (256L) ); |
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183 | } |
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184 | // limit servo value to its parameter range definition |
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185 | if(ServoNickValue < ((int16_t)ParamSet.ServoNickMin * MULTIPLYER) ) |
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186 | { |
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187 | ServoNickValue = (int16_t)ParamSet.ServoNickMin * MULTIPLYER; |
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188 | } |
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189 | else |
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190 | if(ServoNickValue > ((int16_t)ParamSet.ServoNickMax * MULTIPLYER) ) |
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191 | { |
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192 | ServoNickValue = (int16_t)ParamSet.ServoNickMax * MULTIPLYER; |
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193 | } |
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194 | |||
195 | RemainingPulse += ServoNickValue - (256 / 2) * MULTIPLYER; // shift ServoNickValue to center position |
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196 | |||
197 | ServoNickValue /= MULTIPLYER; |
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198 | DebugOut.Analog[20] = ServoNickValue; |
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199 | |||
200 | // range servo pulse width |
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201 | if(RemainingPulse > MAXSERVOPULSE ) RemainingPulse = MAXSERVOPULSE; // upper servo pulse limit |
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202 | else if(RemainingPulse < MINSERVOPULSE ) RemainingPulse = MINSERVOPULSE; // lower servo pulse limit |
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203 | // accumulate time for correct update rate |
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204 | ServoFrameTime = RemainingPulse; |
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205 | } |
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206 | else // we had a high pulse |
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207 | { |
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208 | TCCR2A |= (1<<COM2A0); // make a low pulse |
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209 | RemainingPulse = PPM_FRAMELEN - ServoFrameTime; |
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210 | } |
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211 | // set pulse output active |
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212 | PulseOutput = 1; |
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213 | } |
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214 | } // EOF Nick servo state machine |
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215 | else |
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216 | { |
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217 | //----------------------------------------------------- |
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218 | // PPM state machine, onboard demultiplexed by HEF4017 |
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219 | //----------------------------------------------------- |
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220 | if(!PulseOutput) // pulse output complete |
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221 | { |
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222 | if(TCCR2A & (1<<COM2A0)) // we had a low pulse |
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223 | { |
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224 | TCCR2A &= ~(1<<COM2A0);// make a high pulse |
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225 | |||
226 | if(ServoIndex == 0) // if we are at the sync gap |
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227 | { |
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228 | RemainingPulse = PPM_FRAMELEN - ServoFrameTime; // generate sync gap by filling time to full frame time |
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229 | ServoFrameTime = 0; // reset servo frame time |
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230 | HEF4017R_ON; // enable HEF4017 reset |
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231 | } |
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232 | else // servo channels |
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233 | { |
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234 | RemainingPulse = MINSERVOPULSE + SERVORANGE/2; // center position ~ 1.5ms |
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235 | switch(ServoIndex) // map servo channels |
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236 | { |
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237 | case 1: // Nick Compensation Servo |
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238 | ServoNickOffset = (ServoNickOffset * 3 + (int16_t)FCParam.ServoNickControl * MULTIPLYER) / 4; // lowpass offset |
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239 | ServoNickValue = ServoNickOffset; // offset (Range from 0 to 255 * 3 = 765) |
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240 | if(ParamSet.ServoNickCompInvert & 0x01) |
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241 | { // inverting movement of servo |
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242 | ServoNickValue += (int16_t)( ( (int32_t)ParamSet.ServoNickComp * MULTIPLYER * (IntegralGyroNick / 128L ) ) / (256L) ); |
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243 | } |
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244 | else |
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245 | { // non inverting movement of servo |
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246 | ServoNickValue -= (int16_t)( ( (int32_t)ParamSet.ServoNickComp * MULTIPLYER * (IntegralGyroNick / 128L ) ) / (256L) ); |
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247 | } |
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248 | // limit servo value to its parameter range definition |
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249 | if(ServoNickValue < ((int16_t)ParamSet.ServoNickMin * MULTIPLYER) ) |
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250 | { |
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251 | ServoNickValue = (int16_t)ParamSet.ServoNickMin * MULTIPLYER; |
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252 | } |
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253 | else |
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254 | if(ServoNickValue > ((int16_t)ParamSet.ServoNickMax * MULTIPLYER) ) |
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255 | { |
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256 | ServoNickValue = (int16_t)ParamSet.ServoNickMax * MULTIPLYER; |
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257 | } |
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258 | |||
259 | RemainingPulse += ServoNickValue - (256 / 2) * MULTIPLYER; // shift ServoNickValue to center position |
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260 | |||
261 | ServoNickValue /= MULTIPLYER; |
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262 | DebugOut.Analog[20] = ServoNickValue; |
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263 | break; |
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264 | |||
265 | |||
266 | case 2: // Roll Compensation Servo |
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267 | ServoRollOffset = (ServoRollOffset * 3 + (int16_t)80 * MULTIPLYER) / 4; // lowpass offset |
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268 | ServoRollValue = ServoRollOffset; // offset (Range from 0 to 255 * 3 = 765) |
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269 | //if(ParamSet.ServoRollCompInvert & 0x01) |
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270 | { // inverting movement of servo |
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271 | ServoRollValue += (int16_t)( ( (int32_t) 50 * MULTIPLYER * (IntegralGyroRoll / 128L ) ) / (256L) ); |
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272 | } |
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273 | /* else |
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274 | { // non inverting movement of servo |
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275 | ServoRollValue -= (int16_t)( ( (int32_t) 40 * MULTIPLYER * (IntegralGyroRoll / 128L ) ) / (256L) ); |
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276 | } |
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277 | */ // limit servo value to its parameter range definition |
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278 | if(ServoRollValue < ((int16_t)ParamSet.ServoNickMin * MULTIPLYER) ) |
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279 | { |
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280 | ServoRollValue = (int16_t)ParamSet.ServoNickMin * MULTIPLYER; |
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281 | } |
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282 | else |
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283 | if(ServoRollValue > ((int16_t)ParamSet.ServoNickMax * MULTIPLYER) ) |
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284 | { |
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285 | ServoRollValue = (int16_t)ParamSet.ServoNickMax * MULTIPLYER; |
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286 | } |
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287 | RemainingPulse += ServoRollValue - (256 / 2) * MULTIPLYER; // shift ServoRollValue to center position |
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288 | ServoRollValue /= MULTIPLYER; |
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289 | //DebugOut.Analog[20] = ServoRollValue; |
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290 | break; |
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291 | |||
292 | default: // other servo channels |
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293 | RemainingPulse += 2 * PPM_in[ServoIndex]; // add channel value, factor of 2 because timer 1 increments 3.2µs |
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294 | break; |
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295 | } |
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296 | // range servo pulse width |
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297 | if(RemainingPulse > MAXSERVOPULSE ) RemainingPulse = MAXSERVOPULSE; // upper servo pulse limit |
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298 | else if(RemainingPulse < MINSERVOPULSE ) RemainingPulse = MINSERVOPULSE; // lower servo pulse limit |
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299 | // substract stop pulse width |
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300 | RemainingPulse -= PPM_STOPPULSE; |
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301 | // accumulate time for correct sync gap |
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302 | ServoFrameTime += RemainingPulse; |
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303 | } |
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304 | } |
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305 | else // we had a high pulse |
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306 | { |
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307 | TCCR2A |= (1<<COM2A0); // make a low pulse |
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308 | // set pulsewidth to stop pulse width |
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309 | RemainingPulse = PPM_STOPPULSE; |
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310 | // accumulate time for correct sync gap |
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311 | ServoFrameTime += RemainingPulse; |
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312 | if(ServoActive && RC_Quality > 180) HEF4017R_OFF; // disable HEF4017 reset |
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313 | ServoIndex++; // change to next servo channel |
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314 | if(ServoIndex > ParamSet.ServoRefresh) ServoIndex = 0; // reset to the sync gap |
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315 | } |
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316 | // set pulse output active |
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317 | PulseOutput = 1; |
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318 | } |
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319 | } // EOF PPM state machine |
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320 | |||
321 | // General pulse output generator |
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322 | if(RemainingPulse > (255 + IRS_RUNTIME)) |
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323 | { |
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324 | OCR2A = 255; |
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325 | RemainingPulse -= 255; |
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326 | } |
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327 | else |
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328 | { |
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329 | if(RemainingPulse > 255) // this is the 2nd last part |
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330 | { |
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331 | if((RemainingPulse - 255) < IRS_RUNTIME) |
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332 | { |
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333 | OCR2A = 255 - IRS_RUNTIME; |
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334 | RemainingPulse -= 255 - IRS_RUNTIME; |
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335 | |||
336 | } |
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337 | else // last part > ISR_RUNTIME |
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338 | { |
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339 | OCR2A = 255; |
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340 | RemainingPulse -= 255; |
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341 | } |
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342 | } |
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343 | else // this is the last part |
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344 | { |
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345 | OCR2A = RemainingPulse; |
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346 | RemainingPulse = 0; |
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347 | PulseOutput = 0; // trigger to stop pulse |
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348 | } |
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349 | } // EOF general pulse output generator |
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350 | |||
351 | } |