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1538 | killagreg | 1 | // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
2 | // + Copyright (c) Holger Buss, Ingo Busker |
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3 | // + Nur für den privaten Gebrauch |
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4 | // + www.MikroKopter.com |
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5 | // + porting the sources to other systems or using the software on other systems (except hardware from www.mikrokopter.de) is not allowed |
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6 | // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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7 | // + Es gilt für das gesamte Projekt (Hardware, Software, Binärfiles, Sourcecode und Dokumentation), |
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8 | // + dass eine Nutzung (auch auszugsweise) nur für den privaten (nicht-kommerziellen) Gebrauch zulässig ist. |
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9 | // + Sollten direkte oder indirekte kommerzielle Absichten verfolgt werden, ist mit uns (info@mikrokopter.de) Kontakt |
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10 | // + bzgl. der Nutzungsbedingungen aufzunehmen. |
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11 | // + Eine kommerzielle Nutzung ist z.B.Verkauf von MikroKoptern, Bestückung und Verkauf von Platinen oder Bausätzen, |
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12 | // + Verkauf von Luftbildaufnahmen, usw. |
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13 | // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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14 | // + Werden Teile des Quellcodes (mit oder ohne Modifikation) weiterverwendet oder veröffentlicht, |
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15 | // + unterliegen sie auch diesen Nutzungsbedingungen und diese Nutzungsbedingungen incl. Copyright müssen dann beiliegen |
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16 | // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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17 | // + Sollte die Software (auch auszugesweise) oder sonstige Informationen des MikroKopter-Projekts |
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18 | // + auf anderen Webseiten oder sonstigen Medien veröffentlicht werden, muss unsere Webseite "http://www.mikrokopter.de" |
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19 | // + eindeutig als Ursprung verlinkt werden |
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20 | // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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21 | // + Keine Gewähr auf Fehlerfreiheit, Vollständigkeit oder Funktion |
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22 | // + Benutzung auf eigene Gefahr |
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23 | // + Wir übernehmen keinerlei Haftung für direkte oder indirekte Personen- oder Sachschäden |
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24 | // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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25 | // + Die Portierung der Software (oder Teile davon) auf andere Systeme (ausser der Hardware von www.mikrokopter.de) ist nur |
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26 | // + mit unserer Zustimmung zulässig |
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27 | // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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28 | // + Die Funktion printf_P() unterliegt ihrer eigenen Lizenz und ist hiervon nicht betroffen |
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29 | // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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30 | // + Redistributions of source code (with or without modifications) must retain the above copyright notice, |
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31 | // + this list of conditions and the following disclaimer. |
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32 | // + * 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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33 | // + from this software without specific prior written permission. |
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34 | // + * The use of this project (hardware, software, binary files, sources and documentation) is only permittet |
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35 | // + for non-commercial use (directly or indirectly) |
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36 | // + Commercial use (for excample: selling of MikroKopters, selling of PCBs, assembly, ...) is only permitted |
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37 | // + with our written permission |
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38 | // + * If sources or documentations are redistributet on other webpages, out webpage (http://www.MikroKopter.de) must be |
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39 | // + clearly linked as origin |
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40 | // + * porting to systems other than hardware from www.mikrokopter.de is not allowed |
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41 | // + THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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42 | // + AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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43 | // + IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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44 | // + ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
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45 | // + LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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46 | // + CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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47 | // + SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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48 | // + INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN// + CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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49 | // + ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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50 | // + POSSIBILITY OF SUCH DAMAGE. |
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51 | // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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52 | #include <avr/io.h> |
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53 | #include <avr/interrupt.h> |
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54 | #include "fc.h" |
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55 | #include "eeprom.h" |
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56 | #include "uart0.h" |
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57 | #include "main.h" |
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58 | #include "rc.h" |
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59 | |||
60 | volatile int16_t ServoNickValue = 0; |
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61 | volatile int16_t ServoRollValue = 0; |
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62 | volatile uint8_t ServoActive = 0; |
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63 | |||
64 | #define HEF4017R_ON PORTC |= (1<<PORTC6) |
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65 | #define HEF4017R_OFF PORTC &= ~(1<<PORTC6) |
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66 | |||
67 | |||
68 | /*****************************************************/ |
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69 | /* Initialize Timer 2 */ |
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70 | /*****************************************************/ |
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71 | // The timer 2 is used to generate the PWM at PD7 (J7) |
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72 | // to control a camera servo for nick compensation. |
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73 | void TIMER2_Init(void) |
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74 | { |
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75 | uint8_t sreg = SREG; |
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76 | |||
77 | // disable all interrupts before reconfiguration |
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78 | cli(); |
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79 | |||
80 | DDRD &= ~(1<<DDD7); // set PD7 as input of the PWM for servo |
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81 | //DDRD |= (1<<DDD7); // set PD7 as output of the PWM for servo |
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82 | PORTD &= ~(1<<PORTD7); // set PD7 to low |
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83 | |||
84 | DDRC |= (1<<DDC6); // set PC6 as output (Reset for HEF4017) |
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85 | //PORTC &= ~(1<<PORTC6); // set PC6 to low |
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86 | HEF4017R_ON; // enable reset |
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87 | |||
88 | // Timer/Counter 2 Control Register A |
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89 | |||
90 | // Timer Mode is FastPWM with timer reload at OCR2A (Bits: WGM22 = 1, WGM21 = 1, WGM20 = 1) |
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91 | // PD7: Normal port operation, OC2A disconnected, (Bits: COM2A1 = 0, COM2A0 = 0) |
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92 | // PD6: Normal port operation, OC2B disconnected, (Bits: COM2B1 = 0, COM2B0 = 0) |
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93 | TCCR2A &= ~((1<<COM2A1)|(1<<COM2A0)|(1<<COM2B1)|(1<<COM2B0)); |
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94 | TCCR2A |= (1<<WGM21)|(1<<WGM20); |
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95 | |||
96 | // Timer/Counter 2 Control Register B |
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97 | |||
98 | // Set clock divider for timer 2 to SYSKLOCK/32 = 20MHz / 32 = 625 kHz |
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99 | // The timer increments from 0x00 to 0xFF with an update rate of 625 kHz or 1.6 us |
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100 | // hence the timer overflow interrupt frequency is 625 kHz / 256 = 2.44 kHz or 0.4096 ms |
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101 | |||
102 | // divider 32 (Bits: CS022 = 0, CS21 = 1, CS20 = 1) |
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103 | TCCR2B &= ~((1<<FOC2A)|(1<<FOC2B)|(1<<CS22)); |
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104 | TCCR2B |= (1<<CS21)|(1<<CS20)|(1<<WGM22); |
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105 | |||
106 | // Initialize the Timer/Counter 2 Register |
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107 | TCNT2 = 0; |
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108 | |||
109 | // Initialize the Output Compare Register A used for PWM generation on port PD7. |
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110 | OCR2A = 255; |
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111 | TCCR2A |= (1<<COM2A1); // set or clear at compare match depends on value of COM2A0 |
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112 | |||
113 | // Timer/Counter 2 Interrupt Mask Register |
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114 | // Enable timer output compare match A Interrupt only |
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115 | TIMSK2 &= ~((1<<OCIE2B)|(1<<TOIE2)); |
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116 | TIMSK2 |= (1<<OCIE2A); |
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117 | |||
118 | SREG = sreg; |
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119 | } |
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120 | |||
121 | |||
122 | void Servo_On(void) |
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123 | { |
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124 | ServoActive = 1; |
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125 | DDRD |= (1<<DDD7); // set PD7 as output of the PWM for servo |
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126 | } |
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127 | |||
128 | void Servo_Off(void) |
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129 | { |
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130 | ServoActive = 0; |
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131 | DDRD &= ~(1<<DDD7); // set PD7 as input |
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132 | HEF4017R_ON; // enable reset |
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133 | } |
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134 | |||
135 | /*****************************************************/ |
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136 | /* Control Servo Position */ |
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137 | /*****************************************************/ |
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138 | |||
139 | ISR(TIMER2_COMPA_vect) |
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140 | { |
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141 | |||
142 | // frame len 22.5 ms = 14063 * 1.6 us |
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143 | // stop pulse: 0.3 ms = 188 * 1.6 us |
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144 | // min servo pulse: 0.6 ms = 375 * 1.6 us |
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145 | // max servo pulse: 2.4 ms = 1500 * 1.6 us |
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146 | // resolution: 1500 - 375 = 1125 steps |
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147 | |||
148 | #define IRS_RUNTIME 127 |
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149 | #define PPM_STOPPULSE 188 |
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150 | //#define PPM_FRAMELEN 14063 |
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151 | #define PPM_FRAMELEN (1757 * ParamSet.ServoRefresh) // 22.5 ms / 8 Channels = 2.8125ms per Servo Channel |
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152 | #define MINSERVOPULSE 375 |
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153 | #define MAXSERVOPULSE 1500 |
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154 | #define SERVORANGE (MAXSERVOPULSE - MINSERVOPULSE) |
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155 | |||
156 | static uint8_t PulseOutput = 0; |
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157 | static uint16_t RemainingPulse = 0; |
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158 | static uint16_t ServoFrameTime = 0; |
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159 | static uint8_t ServoIndex = 0; |
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160 | |||
161 | #define MULTIPLYER 4 |
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162 | static int16_t ServoNickOffset = (255 / 2) * MULTIPLYER; // initial value near center position |
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163 | static int16_t ServoRollOffset = (255 / 2) * MULTIPLYER; // initial value near center position |
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164 | |||
165 | if(BoardRelease < 20) |
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166 | { |
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167 | //--------------------------- |
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168 | // Nick servo state machine |
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169 | //--------------------------- |
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170 | if(!PulseOutput) // pulse output complete |
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171 | { |
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172 | if(TCCR2A & (1<<COM2A0)) // we had a low pulse |
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173 | { |
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174 | TCCR2A &= ~(1<<COM2A0);// make a high pulse |
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175 | RemainingPulse = MINSERVOPULSE + SERVORANGE/2; // center position ~ 1.5ms |
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176 | |||
177 | ServoNickOffset = (ServoNickOffset * 3 + (int16_t)FCParam.ServoNickControl * MULTIPLYER) / 4; // lowpass offset |
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178 | ServoNickValue = ServoNickOffset; // offset (Range from 0 to 255 * 3 = 765) |
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179 | if(ParamSet.ServoCompInvert & 0x01) |
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180 | { // inverting movement of servo |
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181 | ServoNickValue += (int16_t)( ( (int32_t)ParamSet.ServoNickComp * MULTIPLYER * (IntegralGyroNick / 128L ) ) / (256L) ); |
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182 | } |
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183 | else |
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184 | { // non inverting movement of servo |
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185 | ServoNickValue -= (int16_t)( ( (int32_t)ParamSet.ServoNickComp * MULTIPLYER * (IntegralGyroNick / 128L ) ) / (256L) ); |
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186 | } |
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187 | // limit servo value to its parameter range definition |
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188 | if(ServoNickValue < ((int16_t)ParamSet.ServoNickMin * MULTIPLYER) ) |
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189 | { |
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190 | ServoNickValue = (int16_t)ParamSet.ServoNickMin * MULTIPLYER; |
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191 | } |
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192 | else |
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193 | if(ServoNickValue > ((int16_t)ParamSet.ServoNickMax * MULTIPLYER) ) |
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194 | { |
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195 | ServoNickValue = (int16_t)ParamSet.ServoNickMax * MULTIPLYER; |
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196 | } |
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197 | |||
198 | RemainingPulse += ServoNickValue - (256 / 2) * MULTIPLYER; // shift ServoNickValue to center position |
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199 | |||
200 | ServoNickValue /= MULTIPLYER; |
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201 | |||
202 | // range servo pulse width |
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203 | if(RemainingPulse > MAXSERVOPULSE ) RemainingPulse = MAXSERVOPULSE; // upper servo pulse limit |
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204 | else if(RemainingPulse < MINSERVOPULSE ) RemainingPulse = MINSERVOPULSE; // lower servo pulse limit |
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205 | // accumulate time for correct update rate |
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206 | ServoFrameTime = RemainingPulse; |
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207 | } |
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208 | else // we had a high pulse |
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209 | { |
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210 | TCCR2A |= (1<<COM2A0); // make a low pulse |
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211 | RemainingPulse = PPM_FRAMELEN - ServoFrameTime; |
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212 | } |
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213 | // set pulse output active |
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214 | PulseOutput = 1; |
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215 | } |
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216 | } // EOF Nick servo state machine |
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217 | else |
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218 | { |
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219 | //----------------------------------------------------- |
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220 | // PPM state machine, onboard demultiplexed by HEF4017 |
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221 | //----------------------------------------------------- |
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222 | if(!PulseOutput) // pulse output complete |
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223 | { |
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224 | if(TCCR2A & (1<<COM2A0)) // we had a low pulse |
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225 | { |
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226 | TCCR2A &= ~(1<<COM2A0);// make a high pulse |
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227 | |||
228 | if(ServoIndex == 0) // if we are at the sync gap |
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229 | { |
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230 | RemainingPulse = PPM_FRAMELEN - ServoFrameTime; // generate sync gap by filling time to full frame time |
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231 | ServoFrameTime = 0; // reset servo frame time |
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232 | HEF4017R_ON; // enable HEF4017 reset |
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233 | } |
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234 | else // servo channels |
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235 | { |
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236 | RemainingPulse = MINSERVOPULSE + SERVORANGE/2; // center position ~ 1.5ms |
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237 | switch(ServoIndex) // map servo channels |
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238 | { |
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239 | case 1: // Nick Compensation Servo |
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240 | ServoNickOffset = (ServoNickOffset * 3 + (int16_t)FCParam.ServoNickControl * MULTIPLYER) / 4; // lowpass offset |
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241 | ServoNickValue = ServoNickOffset; // offset (Range from 0 to 255 * 3 = 765) |
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242 | if(ParamSet.ServoCompInvert & 0x01) |
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243 | { // inverting movement of servo |
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244 | ServoNickValue += (int16_t)( ( (int32_t)ParamSet.ServoNickComp * MULTIPLYER * (IntegralGyroNick / 128L ) ) / (256L) ); |
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245 | } |
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246 | else |
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247 | { // non inverting movement of servo |
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248 | ServoNickValue -= (int16_t)( ( (int32_t)ParamSet.ServoNickComp * MULTIPLYER * (IntegralGyroNick / 128L ) ) / (256L) ); |
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249 | } |
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250 | // limit servo value to its parameter range definition |
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251 | if(ServoNickValue < ((int16_t)ParamSet.ServoNickMin * MULTIPLYER) ) |
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252 | { |
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253 | ServoNickValue = (int16_t)ParamSet.ServoNickMin * MULTIPLYER; |
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254 | } |
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255 | else |
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256 | if(ServoNickValue > ((int16_t)ParamSet.ServoNickMax * MULTIPLYER) ) |
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257 | { |
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258 | ServoNickValue = (int16_t)ParamSet.ServoNickMax * MULTIPLYER; |
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259 | } |
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260 | |||
261 | RemainingPulse += ServoNickValue - (256 / 2) * MULTIPLYER; // shift ServoNickValue to center position |
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262 | |||
263 | ServoNickValue /= MULTIPLYER; |
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264 | break; |
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265 | |||
266 | |||
267 | case 2: // Roll Compensation Servo |
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268 | ServoRollOffset = (ServoRollOffset * 3 + (int16_t)FCParam.ServoRollControl * MULTIPLYER) / 4; // lowpass offset |
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269 | ServoRollValue = ServoRollOffset; // offset (Range from 0 to 255 * 3 = 765) |
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270 | if(ParamSet.ServoCompInvert & 0x02) |
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271 | { // inverting movement of servo |
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272 | ServoRollValue += (int16_t)( ( (int32_t)ParamSet.ServoRollComp * MULTIPLYER * (IntegralGyroRoll / 128L ) ) / (256L) ); |
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273 | } |
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274 | else |
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275 | { // non inverting movement of servo |
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276 | ServoRollValue -= (int16_t)( ( (int32_t)ParamSet.ServoRollComp * MULTIPLYER * (IntegralGyroRoll / 128L ) ) / (256L) ); |
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277 | } |
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278 | // limit servo value to its parameter range definition |
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279 | if(ServoRollValue < ((int16_t)ParamSet.ServoRollMin * MULTIPLYER) ) |
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280 | { |
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281 | ServoRollValue = (int16_t)ParamSet.ServoRollMin * MULTIPLYER; |
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282 | } |
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283 | else |
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284 | if(ServoRollValue > ((int16_t)ParamSet.ServoRollMax * MULTIPLYER) ) |
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285 | { |
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286 | ServoRollValue = (int16_t)ParamSet.ServoRollMax * MULTIPLYER; |
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287 | } |
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288 | RemainingPulse += ServoRollValue - (256 / 2) * MULTIPLYER; // shift ServoRollValue to center position |
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289 | ServoRollValue /= MULTIPLYER; |
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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 | else HEF4017R_ON; // enable reset |
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314 | ServoIndex++; // change to next servo channel |
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315 | if(ServoIndex > ParamSet.ServoRefresh) ServoIndex = 0; // reset to the sync gap |
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316 | } |
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317 | // set pulse output active |
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318 | PulseOutput = 1; |
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319 | } |
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320 | } // EOF PPM state machine |
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321 | |||
322 | // General pulse output generator |
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323 | if(RemainingPulse > (255 + IRS_RUNTIME)) |
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324 | { |
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325 | OCR2A = 255; |
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326 | RemainingPulse -= 255; |
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327 | } |
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328 | else |
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329 | { |
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330 | if(RemainingPulse > 255) // this is the 2nd last part |
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331 | { |
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332 | if((RemainingPulse - 255) < IRS_RUNTIME) |
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333 | { |
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334 | OCR2A = 255 - IRS_RUNTIME; |
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335 | RemainingPulse -= 255 - IRS_RUNTIME; |
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336 | |||
337 | } |
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338 | else // last part > ISR_RUNTIME |
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339 | { |
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340 | OCR2A = 255; |
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341 | RemainingPulse -= 255; |
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342 | } |
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343 | } |
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344 | else // this is the last part |
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345 | { |
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346 | OCR2A = RemainingPulse; |
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347 | RemainingPulse = 0; |
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348 | PulseOutput = 0; // trigger to stop pulse |
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349 | } |
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350 | } // EOF general pulse output generator |
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351 | |||
352 | } |