0,0 → 1,351 |
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
// + Copyright (c) 04.2007 Holger Buss |
// + Nur für den privaten Gebrauch |
// + www.MikroKopter.com |
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
// + Es gilt für das gesamte Projekt (Hardware, Software, Binärfiles, Sourcecode und Dokumentation), |
// + dass eine Nutzung (auch auszugsweise) nur für den privaten (nicht-kommerziellen) Gebrauch zulässig ist. |
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// + bzgl. der Nutzungsbedingungen aufzunehmen. |
// + Eine kommerzielle Nutzung ist z.B.Verkauf von MikroKoptern, Bestückung und Verkauf von Platinen oder Bausätzen, |
// + Verkauf von Luftbildaufnahmen, usw. |
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
// + Werden Teile des Quellcodes (mit oder ohne Modifikation) weiterverwendet oder veröffentlicht, |
// + unterliegen sie auch diesen Nutzungsbedingungen und diese Nutzungsbedingungen incl. Copyright müssen dann beiliegen |
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
// + Sollte die Software (auch auszugesweise) oder sonstige Informationen des MikroKopter-Projekts |
// + auf anderen Webseiten oder sonstigen Medien veröffentlicht werden, muss unsere Webseite "http://www.mikrokopter.de" |
// + eindeutig als Ursprung verlinkt werden |
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
// + Keine Gewähr auf Fehlerfreiheit, Vollständigkeit oder Funktion |
// + Benutzung auf eigene Gefahr |
// + Wir übernehmen keinerlei Haftung für direkte oder indirekte Personen- oder Sachschäden |
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
// + Die Portierung der Software (oder Teile davon) auf andere Systeme (ausser der Hardware von www.mikrokopter.de) ist nur |
// + mit unserer Zustimmung zulässig |
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
// + Die Funktion printf_P() unterliegt ihrer eigenen Lizenz und ist hiervon nicht betroffen |
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
// + Redistributions of source code (with or without modifications) must retain the above copyright notice, |
// + this list of conditions and the following disclaimer. |
// + * Neither the name of the copyright holders nor the names of contributors may be used to endorse or promote products derived |
// + from this software without specific prior written permission. |
// + * The use of this project (hardware, software, binary files, sources and documentation) is only permittet |
// + for non-commercial use (directly or indirectly) |
// + Commercial use (for excample: selling of MikroKopters, selling of PCBs, assembly, ...) is only permitted |
// + with our written permission |
// + * If sources or documentations are redistributet on other webpages, out webpage (http://www.MikroKopter.de) must be |
// + clearly linked as origin |
// + * porting to systems other than hardware from www.mikrokopter.de is not allowed |
// + THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
// + AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
// + IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
// + ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
// + LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
// + CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
// + SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
// + INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN// + CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
// + ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
// + POSSIBILITY OF SUCH DAMAGE. |
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
#include <avr/io.h> |
#include <avr/interrupt.h> |
#include "fc.h" |
#include "eeprom.h" |
#include "uart0.h" |
#include "main.h" |
#include "rc.h" |
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volatile int16_t ServoNickValue = 0; |
volatile int16_t ServoRollValue = 0; |
volatile uint8_t ServoActive = 0; |
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#define HEF4017R_ON PORTC |= (1<<PORTC6) |
#define HEF4017R_OFF PORTC &= ~(1<<PORTC6) |
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/*****************************************************/ |
/* Initialize Timer 2 */ |
/*****************************************************/ |
// The timer 2 is used to generate the PWM at PD7 (J7) |
// to control a camera servo for nick compensation. |
void TIMER2_Init(void) |
{ |
uint8_t sreg = SREG; |
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// disable all interrupts before reconfiguration |
cli(); |
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// set PD7 as output of the PWM for nick servo |
DDRD |= (1<<DDD7); |
PORTD &= ~(1<<PORTD7); // set PD7 to low |
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DDRC |= (1<<DDC6); // set PC6 as output (Reset for HEF4017) |
//PORTC &= ~(1<<PORTC6); // set PC6 to low |
HEF4017R_ON; // enable reset |
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// Timer/Counter 2 Control Register A |
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// Timer Mode is FastPWM with timer reload at OCR2A (Bits: WGM22 = 1, WGM21 = 1, WGM20 = 1) |
// PD7: Normal port operation, OC2A disconnected, (Bits: COM2A1 = 0, COM2A0 = 0) |
// PD6: Normal port operation, OC2B disconnected, (Bits: COM2B1 = 0, COM2B0 = 0) |
TCCR2A &= ~((1<<COM2A1)|(1<<COM2A0)|(1<<COM2B1)|(1<<COM2B0)); |
TCCR2A |= (1<<WGM21)|(1<<WGM20); |
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// Timer/Counter 2 Control Register B |
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// Set clock divider for timer 2 to SYSKLOCK/32 = 20MHz / 32 = 625 kHz |
// The timer increments from 0x00 to 0xFF with an update rate of 625 kHz or 1.6 us |
// hence the timer overflow interrupt frequency is 625 kHz / 256 = 2.44 kHz or 0.4096 ms |
|
// divider 32 (Bits: CS022 = 0, CS21 = 1, CS20 = 1) |
TCCR2B &= ~((1<<FOC2A)|(1<<FOC2B)|(1<<CS22)); |
TCCR2B |= (1<<CS21)|(1<<CS20)|(1<<WGM22); |
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// Initialize the Timer/Counter 2 Register |
TCNT2 = 0; |
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// Initialize the Output Compare Register A used for PWM generation on port PD7. |
OCR2A = 255; |
TCCR2A |= (1<<COM2A1); // set or clear at compare match depends on value of COM2A0 |
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// Timer/Counter 2 Interrupt Mask Register |
// Enable timer output compare match A Interrupt only |
TIMSK2 &= ~((1<<OCIE2B)|(1<<TOIE2)); |
TIMSK2 |= (1<<OCIE2A); |
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SREG = sreg; |
} |
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void Servo_On(void) |
{ |
ServoActive = 1; |
} |
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void Servo_Off(void) |
{ |
ServoActive = 0; |
HEF4017R_ON; // enable reset |
} |
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/*****************************************************/ |
/* Control Servo Position */ |
/*****************************************************/ |
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ISR(TIMER2_COMPA_vect) |
{ |
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// frame len 22.5 ms = 14063 * 1.6 us |
// stop pulse: 0.3 ms = 188 * 1.6 us |
// min servo pulse: 0.6 ms = 375 * 1.6 us |
// max servo pulse: 2.4 ms = 1500 * 1.6 us |
// resolution: 1500 - 375 = 1125 steps |
|
#define IRS_RUNTIME 127 |
#define PPM_STOPPULSE 188 |
//#define PPM_FRAMELEN 14063 |
#define PPM_FRAMELEN (1757 * ParamSet.ServoRefresh) // 22.5 ms / 8 Channels = 2.8125ms per Servo Channel |
#define MINSERVOPULSE 375 |
#define MAXSERVOPULSE 1500 |
#define SERVORANGE (MAXSERVOPULSE - MINSERVOPULSE) |
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static uint8_t PulseOutput = 0; |
static uint16_t RemainingPulse = 0; |
static uint16_t ServoFrameTime = 0; |
static uint8_t ServoIndex = 0; |
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#define MULTIPLYER 4 |
static int16_t ServoNickOffset = (255 / 2) * MULTIPLYER; // initial value near center position |
static int16_t ServoRollOffset = (255 / 2) * MULTIPLYER; // initial value near center position |
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if(BoardRelease < 20) |
{ |
//--------------------------- |
// Nick servo state machine |
//--------------------------- |
if(!PulseOutput) // pulse output complete |
{ |
if(TCCR2A & (1<<COM2A0)) // we had a low pulse |
{ |
TCCR2A &= ~(1<<COM2A0);// make a high pulse |
RemainingPulse = MINSERVOPULSE + SERVORANGE/2; // center position ~ 1.5ms |
|
ServoNickOffset = (ServoNickOffset * 3 + (int16_t)FCParam.ServoNickControl * MULTIPLYER) / 4; // lowpass offset |
ServoNickValue = ServoNickOffset; // offset (Range from 0 to 255 * 3 = 765) |
if(ParamSet.ServoNickCompInvert & 0x01) |
{ // inverting movement of servo |
ServoNickValue += (int16_t)( ( (int32_t)ParamSet.ServoNickComp * MULTIPLYER * (IntegralGyroNick / 128L ) ) / (256L) ); |
} |
else |
{ // non inverting movement of servo |
ServoNickValue -= (int16_t)( ( (int32_t)ParamSet.ServoNickComp * MULTIPLYER * (IntegralGyroNick / 128L ) ) / (256L) ); |
} |
// limit servo value to its parameter range definition |
if(ServoNickValue < ((int16_t)ParamSet.ServoNickMin * MULTIPLYER) ) |
{ |
ServoNickValue = (int16_t)ParamSet.ServoNickMin * MULTIPLYER; |
} |
else |
if(ServoNickValue > ((int16_t)ParamSet.ServoNickMax * MULTIPLYER) ) |
{ |
ServoNickValue = (int16_t)ParamSet.ServoNickMax * MULTIPLYER; |
} |
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RemainingPulse += ServoNickValue - (256 / 2) * MULTIPLYER; // shift ServoNickValue to center position |
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ServoNickValue /= MULTIPLYER; |
DebugOut.Analog[20] = ServoNickValue; |
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// range servo pulse width |
if(RemainingPulse > MAXSERVOPULSE ) RemainingPulse = MAXSERVOPULSE; // upper servo pulse limit |
else if(RemainingPulse < MINSERVOPULSE ) RemainingPulse = MINSERVOPULSE; // lower servo pulse limit |
// accumulate time for correct update rate |
ServoFrameTime = RemainingPulse; |
} |
else // we had a high pulse |
{ |
TCCR2A |= (1<<COM2A0); // make a low pulse |
RemainingPulse = PPM_FRAMELEN - ServoFrameTime; |
} |
// set pulse output active |
PulseOutput = 1; |
} |
} // EOF Nick servo state machine |
else |
{ |
//----------------------------------------------------- |
// PPM state machine, onboard demultiplexed by HEF4017 |
//----------------------------------------------------- |
if(!PulseOutput) // pulse output complete |
{ |
if(TCCR2A & (1<<COM2A0)) // we had a low pulse |
{ |
TCCR2A &= ~(1<<COM2A0);// make a high pulse |
|
if(ServoIndex == 0) // if we are at the sync gap |
{ |
RemainingPulse = PPM_FRAMELEN - ServoFrameTime; // generate sync gap by filling time to full frame time |
ServoFrameTime = 0; // reset servo frame time |
HEF4017R_ON; // enable HEF4017 reset |
} |
else // servo channels |
{ |
RemainingPulse = MINSERVOPULSE + SERVORANGE/2; // center position ~ 1.5ms |
switch(ServoIndex) // map servo channels |
{ |
case 1: // Nick Compensation Servo |
ServoNickOffset = (ServoNickOffset * 3 + (int16_t)FCParam.ServoNickControl * MULTIPLYER) / 4; // lowpass offset |
ServoNickValue = ServoNickOffset; // offset (Range from 0 to 255 * 3 = 765) |
if(ParamSet.ServoNickCompInvert & 0x01) |
{ // inverting movement of servo |
ServoNickValue += (int16_t)( ( (int32_t)ParamSet.ServoNickComp * MULTIPLYER * (IntegralGyroNick / 128L ) ) / (256L) ); |
} |
else |
{ // non inverting movement of servo |
ServoNickValue -= (int16_t)( ( (int32_t)ParamSet.ServoNickComp * MULTIPLYER * (IntegralGyroNick / 128L ) ) / (256L) ); |
} |
// limit servo value to its parameter range definition |
if(ServoNickValue < ((int16_t)ParamSet.ServoNickMin * MULTIPLYER) ) |
{ |
ServoNickValue = (int16_t)ParamSet.ServoNickMin * MULTIPLYER; |
} |
else |
if(ServoNickValue > ((int16_t)ParamSet.ServoNickMax * MULTIPLYER) ) |
{ |
ServoNickValue = (int16_t)ParamSet.ServoNickMax * MULTIPLYER; |
} |
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RemainingPulse += ServoNickValue - (256 / 2) * MULTIPLYER; // shift ServoNickValue to center position |
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ServoNickValue /= MULTIPLYER; |
DebugOut.Analog[20] = ServoNickValue; |
break; |
|
|
case 2: // Roll Compensation Servo |
ServoRollOffset = (ServoRollOffset * 3 + (int16_t)80 * MULTIPLYER) / 4; // lowpass offset |
ServoRollValue = ServoRollOffset; // offset (Range from 0 to 255 * 3 = 765) |
//if(ParamSet.ServoRollCompInvert & 0x01) |
{ // inverting movement of servo |
ServoRollValue += (int16_t)( ( (int32_t) 50 * MULTIPLYER * (IntegralGyroRoll / 128L ) ) / (256L) ); |
} |
/* else |
{ // non inverting movement of servo |
ServoRollValue -= (int16_t)( ( (int32_t) 40 * MULTIPLYER * (IntegralGyroRoll / 128L ) ) / (256L) ); |
} |
*/ // limit servo value to its parameter range definition |
if(ServoRollValue < ((int16_t)ParamSet.ServoNickMin * MULTIPLYER) ) |
{ |
ServoRollValue = (int16_t)ParamSet.ServoNickMin * MULTIPLYER; |
} |
else |
if(ServoRollValue > ((int16_t)ParamSet.ServoNickMax * MULTIPLYER) ) |
{ |
ServoRollValue = (int16_t)ParamSet.ServoNickMax * MULTIPLYER; |
} |
RemainingPulse += ServoRollValue - (256 / 2) * MULTIPLYER; // shift ServoRollValue to center position |
ServoRollValue /= MULTIPLYER; |
//DebugOut.Analog[20] = ServoRollValue; |
break; |
|
default: // other servo channels |
RemainingPulse += 2 * PPM_in[ServoIndex]; // add channel value, factor of 2 because timer 1 increments 3.2µs |
break; |
} |
// range servo pulse width |
if(RemainingPulse > MAXSERVOPULSE ) RemainingPulse = MAXSERVOPULSE; // upper servo pulse limit |
else if(RemainingPulse < MINSERVOPULSE ) RemainingPulse = MINSERVOPULSE; // lower servo pulse limit |
// substract stop pulse width |
RemainingPulse -= PPM_STOPPULSE; |
// accumulate time for correct sync gap |
ServoFrameTime += RemainingPulse; |
} |
} |
else // we had a high pulse |
{ |
TCCR2A |= (1<<COM2A0); // make a low pulse |
// set pulsewidth to stop pulse width |
RemainingPulse = PPM_STOPPULSE; |
// accumulate time for correct sync gap |
ServoFrameTime += RemainingPulse; |
if(ServoActive && RC_Quality > 180) HEF4017R_OFF; // disable HEF4017 reset |
ServoIndex++; // change to next servo channel |
if(ServoIndex > ParamSet.ServoRefresh) ServoIndex = 0; // reset to the sync gap |
} |
// set pulse output active |
PulseOutput = 1; |
} |
} // EOF PPM state machine |
|
// General pulse output generator |
if(RemainingPulse > (255 + IRS_RUNTIME)) |
{ |
OCR2A = 255; |
RemainingPulse -= 255; |
} |
else |
{ |
if(RemainingPulse > 255) // this is the 2nd last part |
{ |
if((RemainingPulse - 255) < IRS_RUNTIME) |
{ |
OCR2A = 255 - IRS_RUNTIME; |
RemainingPulse -= 255 - IRS_RUNTIME; |
|
} |
else // last part > ISR_RUNTIME |
{ |
OCR2A = 255; |
RemainingPulse -= 255; |
} |
} |
else // this is the last part |
{ |
OCR2A = RemainingPulse; |
RemainingPulse = 0; |
PulseOutput = 0; // trigger to stop pulse |
} |
} // EOF general pulse output generator |
|
} |