mirror of https://github.com/ArduPilot/ardupilot
purple: rework APM_RC library for purple hardware
this splits the APM_RC class into instances for purple and APM1, and adds example sketches for both
This commit is contained in:
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@ -1,9 +1,7 @@
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#ifndef APM_RC_h
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#define APM_RC_h
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#ifndef __APM_RC_H__
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#define __APM_RC_H__
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#define NUM_CHANNELS 8
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#define MIN_PULSEWIDTH 900
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#define MAX_PULSEWIDTH 2100
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#include <inttypes.h>
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// Radio channels
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// Note channels are from 0!
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@ -15,30 +13,23 @@
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#define CH_6 5
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#define CH_7 6
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#define CH_8 7
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#define CH_10 9 //PB5
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#define CH_11 10 //PE3
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#define CH_10 9
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#define CH_11 10
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#include <inttypes.h>
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#define NUM_CHANNELS 8
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class APM_RC_Class
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{
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private:
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public:
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APM_RC_Class();
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void Init();
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void OutputCh(uint8_t ch, uint16_t pwm);
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uint16_t InputCh(uint8_t ch);
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uint8_t GetState();
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void Force_Out0_Out1(void);
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void Force_Out2_Out3(void);
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void Force_Out6_Out7(void);
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bool setHIL(int16_t v[NUM_CHANNELS]);
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void clearOverride(void);
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private:
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int16_t _HIL_override[NUM_CHANNELS];
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APM_RC_Class() {}
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virtual void OutputCh(uint8_t ch, uint16_t pwm) = 0;
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virtual uint16_t InputCh(uint8_t ch) = 0;
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virtual uint8_t GetState() = 0;
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virtual void clearOverride(void) = 0;
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virtual void Force_Out() = 0;
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};
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extern APM_RC_Class APM_RC;
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#include "APM_RC_APM1.h"
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#include "APM_RC_Purple.h"
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#endif
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@ -1,5 +1,5 @@
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/*
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APM_RC.cpp - Radio Control Library for Ardupilot Mega. Arduino
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APM_RC_APM1.cpp - Radio Control Library for Ardupilot Mega. Arduino
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Code by Jordi Muñoz and Jose Julio. DIYDrones.com
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This library is free software; you can redistribute it and/or
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@ -18,7 +18,7 @@
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Automatically resets when we call InputCh to read channels
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*/
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#include "APM_RC.h"
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#include "APM_RC_APM1.h"
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#include <avr/interrupt.h>
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#include "WProgram.h"
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#else
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// Variable definition for Input Capture interrupt
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//volatile uint16_t ICR4_old;
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//volatile uint8_t PPM_Counter=0;
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volatile uint16_t PWM_RAW[NUM_CHANNELS] = {2400,2400,2400,2400,2400,2400,2400,2400};
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volatile uint8_t radio_status=0;
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volatile uint16_t APM_RC_APM1::_PWM_RAW[NUM_CHANNELS] = {2400,2400,2400,2400,2400,2400,2400,2400};
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volatile uint8_t APM_RC_APM1::_radio_status=0;
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/****************************************************
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Input Capture Interrupt ICP4 => PPM signal read
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****************************************************/
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ISR(TIMER4_CAPT_vect)
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void APM_RC_APM1::_timer4_capt_cb(void)
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{
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static uint16_t ICR4_old;
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static uint8_t PPM_Counter=0;
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}
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else {
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if (PPM_Counter < NUM_CHANNELS) { // Valid pulse channel?
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PWM_RAW[PPM_Counter++]=Pulse_Width; // Saving pulse.
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_PWM_RAW[PPM_Counter++]=Pulse_Width; // Saving pulse.
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if (PPM_Counter >= NUM_CHANNELS) {
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radio_status = 1;
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_radio_status = 1;
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}
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}
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}
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// Constructors ////////////////////////////////////////////////////////////////
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APM_RC_Class::APM_RC_Class()
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APM_RC_APM1::APM_RC_APM1()
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{
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}
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// Public Methods //////////////////////////////////////////////////////////////
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void APM_RC_Class::Init(void)
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void APM_RC_APM1::Init( Arduino_Mega_ISR_Registry * isr_reg )
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{
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isr_reg->register_signal(ISR_REGISTRY_TIMER4_CAPT, _timer4_capt_cb );
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// Init PWM Timer 1
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pinMode(11,OUTPUT); //OUT9 (PB5/OC1A)
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pinMode(12,OUTPUT); //OUT2 (PB6/OC1B)
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TIMSK4 |= (1<<ICIE4); // Enable Input Capture interrupt. Timer interrupt mask
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}
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void APM_RC_Class::OutputCh(uint8_t ch, uint16_t pwm)
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void APM_RC_APM1::OutputCh(uint8_t ch, uint16_t pwm)
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{
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pwm=constrain(pwm,MIN_PULSEWIDTH,MAX_PULSEWIDTH);
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pwm<<=1; // pwm*2;
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}
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}
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uint16_t APM_RC_Class::InputCh(uint8_t ch)
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uint16_t APM_RC_APM1::InputCh(uint8_t ch)
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{
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uint16_t result;
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// Because servo pulse variables are 16 bits and the interrupts are running values could be corrupted.
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// We dont want to stop interrupts to read radio channels so we have to do two readings to be sure that the value is correct...
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result = PWM_RAW[ch];
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if (result != PWM_RAW[ch]) {
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result = PWM_RAW[ch]; // if the results are different we make a third reading (this should be fine)
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result = _PWM_RAW[ch];
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if (result != _PWM_RAW[ch]) {
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result = _PWM_RAW[ch]; // if the results are different we make a third reading (this should be fine)
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}
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result >>= 1; // Because timer runs at 0.5us we need to do value/2
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// Limit values to a valid range
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result = constrain(result,MIN_PULSEWIDTH,MAX_PULSEWIDTH);
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radio_status=0; // Radio channel read
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_radio_status=0; // Radio channel read
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return(result);
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}
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uint8_t APM_RC_Class::GetState(void)
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uint8_t APM_RC_APM1::GetState(void)
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{
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return(radio_status);
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return(_radio_status);
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}
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// InstantPWM implementation
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void APM_RC_APM1::Force_Out(void)
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{
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Force_Out0_Out1();
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Force_Out2_Out3();
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Force_Out6_Out7();
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}
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// This function forces the PWM output (reset PWM) on Out0 and Out1 (Timer5). For quadcopters use
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void APM_RC_Class::Force_Out0_Out1(void)
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void APM_RC_APM1::Force_Out0_Out1(void)
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{
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if (TCNT5>5000) // We take care that there are not a pulse in the output
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TCNT5=39990; // This forces the PWM output to reset in 5us (10 counts of 0.5us). The counter resets at 40000
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}
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// This function forces the PWM output (reset PWM) on Out2 and Out3 (Timer1). For quadcopters use
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void APM_RC_Class::Force_Out2_Out3(void)
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void APM_RC_APM1::Force_Out2_Out3(void)
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{
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if (TCNT1>5000)
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TCNT1=39990;
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}
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// This function forces the PWM output (reset PWM) on Out6 and Out7 (Timer3). For quadcopters use
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void APM_RC_Class::Force_Out6_Out7(void)
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void APM_RC_APM1::Force_Out6_Out7(void)
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{
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if (TCNT3>5000)
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TCNT3=39990;
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// allow HIL override of RC values
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// A value of -1 means no change
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// A value of 0 means no override, use the real RC values
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bool APM_RC_Class::setHIL(int16_t v[NUM_CHANNELS])
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bool APM_RC_APM1::setHIL(int16_t v[NUM_CHANNELS])
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{
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uint8_t sum = 0;
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for (uint8_t i=0; i<NUM_CHANNELS; i++) {
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sum++;
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}
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}
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radio_status = 1;
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_radio_status = 1;
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if (sum == 0) {
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return 0;
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} else {
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}
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}
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void APM_RC_Class::clearOverride(void)
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void APM_RC_APM1::clearOverride(void)
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{
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for (uint8_t i=0; i<NUM_CHANNELS; i++) {
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_HIL_override[i] = 0;
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}
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// make one instance for the user to use
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APM_RC_Class APM_RC;
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#endif // defined(ATMega1280)
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#ifndef __APM_RC_APM1_H__
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#define __APM_RC_APM1_H__
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#define MIN_PULSEWIDTH 900
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#define MAX_PULSEWIDTH 2100
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#include "APM_RC.h"
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#include "../Arduino_Mega_ISR_Registry/Arduino_Mega_ISR_Registry.h"
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class APM_RC_APM1 : public APM_RC_Class
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{
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public:
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APM_RC_APM1();
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void Init( Arduino_Mega_ISR_Registry * isr_reg );
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void OutputCh(uint8_t ch, uint16_t pwm);
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uint16_t InputCh(uint8_t ch);
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uint8_t GetState();
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bool setHIL(int16_t v[NUM_CHANNELS]);
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void clearOverride(void);
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void Force_Out(void);
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void Force_Out0_Out1(void);
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void Force_Out2_Out3(void);
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void Force_Out6_Out7(void);
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private:
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static void _timer4_capt_cb(void);
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static volatile uint16_t _PWM_RAW[NUM_CHANNELS];
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static volatile uint8_t _radio_status;
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int16_t _HIL_override[NUM_CHANNELS];
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};
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#endif
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/*
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APM_RC_Purple.cpp - Radio Control Library for Ardupilot Mega 2.0. Arduino
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Code by Jordi Muñoz and Jose Julio. DIYDrones.com
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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RC Input : PPM signal on IC4 pin
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RC Output : 11 Servo outputs (standard 20ms frame)
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Methods:
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Init() : Initialization of interrupts an Timers
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OutpuCh(ch,pwm) : Output value to servos (range : 900-2100us) ch=0..10
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InputCh(ch) : Read a channel input value. ch=0..7
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GetState() : Returns the state of the input. 1 => New radio frame to process
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Automatically resets when we call InputCh to read channels
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*/
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#include "APM_RC_Purple.h"
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#include "WProgram.h"
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#if !defined(__AVR_ATmega1280__) && !defined(__AVR_ATmega2560__)
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# error Please check the Tools/Board menu to ensure you have selected Arduino Mega as your target.
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#else
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// Variable definition for Input Capture interrupt
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volatile uint16_t APM_RC_Purple::_PWM_RAW[NUM_CHANNELS] = {2400,2400,2400,2400,2400,2400,2400,2400};
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volatile uint8_t APM_RC_Purple::_radio_status=0;
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/****************************************************
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Input Capture Interrupt ICP5 => PPM signal read
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****************************************************/
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void APM_RC_Purple::_timer5_capt_cb(void)
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{
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static uint16_t prev_icr;
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static uint8_t frame_idx;
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uint16_t icr;
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uint16_t pwidth;
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icr = ICR5;
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// Calculate pulse width assuming timer overflow TOP = 40000
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if ( icr < prev_icr ) {
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pwidth = ( icr + 40000 ) - prev_icr;
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} else {
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pwidth = icr - prev_icr;
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}
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// Was it a sync pulse? If so, reset frame.
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if ( pwidth > 8000 ) {
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frame_idx=0;
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} else {
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// Save pulse into _PWM_RAW array.
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if ( frame_idx < NUM_CHANNELS ) {
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_PWM_RAW[ frame_idx++ ] = pwidth;
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// If this is the last pulse in a frame, set _radio_status.
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if (frame_idx >= NUM_CHANNELS) {
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_radio_status = 1;
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}
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}
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}
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// Save icr for next call.
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prev_icr = icr;
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}
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// Constructors ////////////////////////////////////////////////////////////////
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APM_RC_Purple::APM_RC_Purple()
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{
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}
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// Public Methods //////////////////////////////////////////////////////////////
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void APM_RC_Purple::Init( Arduino_Mega_ISR_Registry * isr_reg )
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{
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// --------------------- TIMER1: OUT1 and OUT2 -----------------------
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pinMode(12,OUTPUT); // OUT1 (PB6/OC1B)
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pinMode(11,OUTPUT); // OUT2 (PB5/OC1A)
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// WGM: 1 1 1 0. Clear Timer on Compare, TOP is ICR1.
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// COM1A and COM1B enabled, set to low level on match.
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// CS11: prescale by 8 => 0.5us tick
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TCCR1A =((1<<WGM11)|(1<<COM1A1)|(1<<COM1B1));
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TCCR1B = (1<<WGM13)|(1<<WGM12)|(1<<CS11);
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ICR1 = 40000; // 0.5us tick => 50hz freq
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OutputCh(1, 1100);
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OutputCh(2, 1100);
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// --------------- TIMER4: OUT3, OUT4, and OUT5 ---------------------
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pinMode(8,OUTPUT); // OUT3 (PH5/OC4C)
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pinMode(7,OUTPUT); // OUT4 (PH4/OC4B)
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pinMode(6,OUTPUT); // OUT5 (PH3/OC4A)
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// WGM: 1 1 1 0. Clear Timer on Compare, TOP is ICR4.
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// COM4A, 4B, 4C enabled, set to low level on match.
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// CS41: prescale by 8 => 0.5us tick
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TCCR4A =((1<<WGM41)|(1<<COM4A1)|(1<<COM4B1)|(1<<COM4C1));
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TCCR4B = (1<<WGM43)|(1<<WGM42)|(1<<CS41);
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ICR4 = 40000; // 0.5us tick => 50hz freq
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OutputCh(3, 1100);
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OutputCh(4, 1100);
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OutputCh(5, 1100);
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//--------------- TIMER3: OUT6, OUT7, and OUT8 ----------------------
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pinMode(3,OUTPUT); // OUT6 (PE5/OC3C)
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pinMode(2,OUTPUT); // OUT7 (PE4/OC3B)
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pinMode(5,OUTPUT); // OUT8 (PE3/OC3A)
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// WGM: 1 1 1 0. Clear timer on Compare, TOP is ICR3
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// COM3A, 3B, 3C enabled, set to low level on match
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// CS31: prescale by 8 => 0.5us tick
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TCCR3A =((1<<WGM31)|(1<<COM3A1)|(1<<COM3B1)|(1<<COM3C1));
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TCCR3B = (1<<WGM33)|(1<<WGM32)|(1<<CS31);
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ICR3 = 40000; // 0.5us tick => 50hz freq
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OutputCh(6, 1100);
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OutputCh(7, 1100);
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OutputCh(8, 1100);
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//--------------- TIMER5: PPM INPUT ---------------------------------
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// Init PPM input on Timer 5
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pinMode(48, INPUT); // PPM Input (PL1/ICP5)
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// WGM: 1 1 1 1. Fast PWM, TOP is OCR5A
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// COM all disabled.
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// CS51: prescale by 8 => 0.5us tick
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// ICES5: Input Capture on rising edge
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TCCR5A =((1<<WGM50)|(1<<WGM51));
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// Input Capture rising edge
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TCCR5B = ((1<<WGM53)|(1<<WGM52)|(1<<CS51)|(1<<ICES5));
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OCR5A = 40000; // 0.5us tick => 50hz freq. The input capture routine
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// assumes this 40000 for TOP.
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isr_reg->register_signal( ISR_REGISTRY_TIMER5_CAPT, _timer5_capt_cb );
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// Enable Input Capture interrupt
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TIMSK5 |= (1<<ICIE5);
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}
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void APM_RC_Purple::OutputCh(unsigned char ch, uint16_t pwm)
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{
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pwm=constrain(pwm,MIN_PULSEWIDTH,MAX_PULSEWIDTH);
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pwm<<=1; // pwm*2;
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switch(ch)
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{
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case 0: OCR1B=pwm; break; // out1
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case 1: OCR1A=pwm; break; // out2
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case 2: OCR4C=pwm; break; // out3
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case 3: OCR4B=pwm; break; // out4
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case 4: OCR4A=pwm; break; // out5
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case 5: OCR3C=pwm; break; // out6
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case 6: OCR3B=pwm; break; // out7
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case 7: OCR3A=pwm; break; // out8
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}
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}
|
||||
|
||||
uint16_t APM_RC_Purple::InputCh(unsigned char ch)
|
||||
{
|
||||
uint16_t result;
|
||||
uint16_t result2;
|
||||
|
||||
if (_HIL_override[ch] != 0) {
|
||||
return _HIL_override[ch];
|
||||
}
|
||||
|
||||
// Because servo pulse variables are 16 bits and the interrupts are running values could be corrupted.
|
||||
// We dont want to stop interrupts to read radio channels so we have to do two readings to be sure that the value is correct...
|
||||
result = _PWM_RAW[ch]>>1; // Because timer runs at 0.5us we need to do value/2
|
||||
result2 = _PWM_RAW[ch]>>1;
|
||||
if (result != result2)
|
||||
result = _PWM_RAW[ch]>>1; // if the results are different we make a third reading (this should be fine)
|
||||
|
||||
// Limit values to a valid range
|
||||
result = constrain(result,MIN_PULSEWIDTH,MAX_PULSEWIDTH);
|
||||
_radio_status=0; // Radio channel read
|
||||
return(result);
|
||||
}
|
||||
|
||||
unsigned char APM_RC_Purple::GetState(void)
|
||||
{
|
||||
return(_radio_status);
|
||||
}
|
||||
|
||||
// InstantPWM is not implemented!
|
||||
|
||||
void APM_RC_Purple::Force_Out(void) { }
|
||||
void APM_RC_Purple::Force_Out0_Out1(void) { }
|
||||
void APM_RC_Purple::Force_Out2_Out3(void) { }
|
||||
void APM_RC_Purple::Force_Out6_Out7(void) { }
|
||||
|
||||
// allow HIL override of RC values
|
||||
// A value of -1 means no change
|
||||
// A value of 0 means no override, use the real RC values
|
||||
bool APM_RC_Purple::setHIL(int16_t v[NUM_CHANNELS])
|
||||
{
|
||||
uint8_t sum = 0;
|
||||
for (unsigned char i=0; i<NUM_CHANNELS; i++) {
|
||||
if (v[i] != -1) {
|
||||
_HIL_override[i] = v[i];
|
||||
}
|
||||
if (_HIL_override[i] != 0) {
|
||||
sum++;
|
||||
}
|
||||
}
|
||||
if (sum == 0) {
|
||||
return 0;
|
||||
} else {
|
||||
return 1;
|
||||
}
|
||||
_radio_status = 1;
|
||||
}
|
||||
|
||||
void APM_RC_Purple::clearOverride(void)
|
||||
{
|
||||
for (unsigned char i=0; i<NUM_CHANNELS; i++) {
|
||||
_HIL_override[i] = 0;
|
||||
}
|
||||
}
|
||||
|
||||
#endif
|
|
@ -0,0 +1,36 @@
|
|||
#ifndef __APM_RC_PURPLE_H__
|
||||
#define __APM_RC_PURPLE_H__
|
||||
|
||||
#define NUM_CHANNELS 8
|
||||
#define MIN_PULSEWIDTH 900
|
||||
#define MAX_PULSEWIDTH 2100
|
||||
|
||||
#include "APM_RC.h"
|
||||
#include "../Arduino_Mega_ISR_Registry/Arduino_Mega_ISR_Registry.h"
|
||||
|
||||
class APM_RC_Purple : public APM_RC_Class
|
||||
{
|
||||
private:
|
||||
public:
|
||||
APM_RC_Purple();
|
||||
void Init( Arduino_Mega_ISR_Registry * isr_reg );
|
||||
void OutputCh(unsigned char ch, uint16_t pwm);
|
||||
uint16_t InputCh(unsigned char ch);
|
||||
unsigned char GetState();
|
||||
bool setHIL(int16_t v[NUM_CHANNELS]);
|
||||
void clearOverride(void);
|
||||
void Force_Out(void);
|
||||
void Force_Out0_Out1(void);
|
||||
void Force_Out2_Out3(void);
|
||||
void Force_Out6_Out7(void);
|
||||
|
||||
private:
|
||||
|
||||
static void _timer5_capt_cb(void);
|
||||
static volatile uint16_t _PWM_RAW[NUM_CHANNELS];
|
||||
static volatile uint8_t _radio_status;
|
||||
int16_t _HIL_override[NUM_CHANNELS];
|
||||
};
|
||||
|
||||
|
||||
#endif
|
|
@ -6,13 +6,18 @@
|
|||
(Works with last PPM_encoder firmware)
|
||||
*/
|
||||
|
||||
#include <Arduino_Mega_ISR_Registry.h>
|
||||
#include <APM_RC.h> // ArduPilot Mega RC Library
|
||||
|
||||
Arduino_Mega_ISR_Registry isr_registry;
|
||||
APM_RC_APM1 APM_RC;
|
||||
|
||||
void setup()
|
||||
{
|
||||
APM_RC.Init(); // APM Radio initialization
|
||||
isr_registry.init();
|
||||
APM_RC.Init(&isr_registry); // APM Radio initialization
|
||||
|
||||
Serial.begin(38400);
|
||||
Serial.begin(115200);
|
||||
Serial.println("ArduPilot Mega RC library test");
|
||||
delay(1000);
|
||||
}
|
|
@ -1,2 +1,2 @@
|
|||
BOARD = mega
|
||||
BOARD = mega2560
|
||||
include ../../../AP_Common/Arduino.mk
|
|
@ -0,0 +1,2 @@
|
|||
BOARD = mega2560
|
||||
include ../../../AP_Common/Arduino.mk
|
|
@ -0,0 +1,37 @@
|
|||
/*
|
||||
Example of APM_RC library.
|
||||
Code by Jordi MuÒoz and Jose Julio. DIYDrones.com
|
||||
|
||||
Print Input values and send Output to the servos
|
||||
(Works with last PPM_encoder firmware)
|
||||
*/
|
||||
|
||||
#include <Arduino_Mega_ISR_Registry.h>
|
||||
#include <APM_RC.h> // ArduPilot Mega RC Library
|
||||
|
||||
Arduino_Mega_ISR_Registry isr_registry;
|
||||
APM_RC_Purple APM_RC;
|
||||
|
||||
void setup()
|
||||
{
|
||||
isr_registry.init();
|
||||
APM_RC.Init(&isr_registry); // APM Radio initialization
|
||||
|
||||
Serial.begin(115200);
|
||||
Serial.println("ArduPilot Mega RC library test");
|
||||
delay(1000);
|
||||
}
|
||||
|
||||
void loop()
|
||||
{
|
||||
// New radio frame? (we could use also if((millis()- timer) > 20)
|
||||
if (APM_RC.GetState() == 1){
|
||||
Serial.print("CH:");
|
||||
for(int i = 0; i < 8; i++){
|
||||
Serial.print(APM_RC.InputCh(i)); // Print channel values
|
||||
Serial.print(",");
|
||||
APM_RC.OutputCh(i, APM_RC.InputCh(i)); // Copy input to Servos
|
||||
}
|
||||
Serial.println();
|
||||
}
|
||||
}
|
Loading…
Reference in New Issue