mirror of
https://github.com/ArduPilot/ardupilot
synced 2025-01-03 22:48:29 -04:00
23ae607c6c
this stops us using uninitialised values in modes like circle which can operate either with or without RC input. If we didn't have a RC receiver attached then they would use a maximum yaw rate (which produces quite a spectacular result for a tuned up racing quad)
218 lines
7.6 KiB
C++
218 lines
7.6 KiB
C++
#include "Copter.h"
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// Function that will read the radio data, limit servos and trigger a failsafe
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// ----------------------------------------------------------------------------
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void Copter::default_dead_zones()
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{
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channel_roll->set_default_dead_zone(20);
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channel_pitch->set_default_dead_zone(20);
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#if FRAME_CONFIG == HELI_FRAME
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channel_throttle->set_default_dead_zone(10);
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channel_yaw->set_default_dead_zone(15);
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#else
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channel_throttle->set_default_dead_zone(30);
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channel_yaw->set_default_dead_zone(20);
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#endif
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rc().channel(CH_6)->set_default_dead_zone(0);
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}
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void Copter::init_rc_in()
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{
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channel_roll = rc().channel(rcmap.roll()-1);
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channel_pitch = rc().channel(rcmap.pitch()-1);
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channel_throttle = rc().channel(rcmap.throttle()-1);
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channel_yaw = rc().channel(rcmap.yaw()-1);
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// set rc channel ranges
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channel_roll->set_angle(ROLL_PITCH_YAW_INPUT_MAX);
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channel_pitch->set_angle(ROLL_PITCH_YAW_INPUT_MAX);
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channel_yaw->set_angle(ROLL_PITCH_YAW_INPUT_MAX);
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channel_throttle->set_range(1000);
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// set auxiliary servo ranges
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rc().channel(CH_5)->set_range(1000);
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rc().channel(CH_6)->set_range(1000);
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rc().channel(CH_7)->set_range(1000);
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rc().channel(CH_8)->set_range(1000);
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// set default dead zones
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default_dead_zones();
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// initialise throttle_zero flag
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ap.throttle_zero = true;
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}
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// init_rc_out -- initialise motors
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void Copter::init_rc_out()
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{
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motors->set_loop_rate(scheduler.get_loop_rate_hz());
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motors->init((AP_Motors::motor_frame_class)g2.frame_class.get(), (AP_Motors::motor_frame_type)g.frame_type.get());
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// enable aux servos to cope with multiple output channels per motor
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SRV_Channels::enable_aux_servos();
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// update rate must be set after motors->init() to allow for motor mapping
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motors->set_update_rate(g.rc_speed);
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#if FRAME_CONFIG != HELI_FRAME
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motors->set_throttle_range(channel_throttle->get_radio_min(), channel_throttle->get_radio_max());
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#else
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// setup correct scaling for ESCs like the UAVCAN PX4ESC which
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// take a proportion of speed.
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hal.rcout->set_esc_scaling(channel_throttle->get_radio_min(), channel_throttle->get_radio_max());
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#endif
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// refresh auxiliary channel to function map
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SRV_Channels::update_aux_servo_function();
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#if FRAME_CONFIG != HELI_FRAME
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/*
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setup a default safety ignore mask, so that servo gimbals can be active while safety is on
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*/
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uint16_t safety_ignore_mask = (~copter.motors->get_motor_mask()) & 0x3FFF;
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BoardConfig.set_default_safety_ignore_mask(safety_ignore_mask);
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#endif
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}
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// enable_motor_output() - enable and output lowest possible value to motors
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void Copter::enable_motor_output()
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{
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// enable motors
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motors->output_min();
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}
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void Copter::read_radio()
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{
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const uint32_t tnow_ms = millis();
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if (rc().read_input()) {
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ap.new_radio_frame = true;
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set_throttle_and_failsafe(channel_throttle->get_radio_in());
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set_throttle_zero_flag(channel_throttle->get_control_in());
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// RC receiver must be attached if we've just got input
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ap.rc_receiver_present = true;
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// pass pilot input through to motors (used to allow wiggling servos while disarmed on heli, single, coax copters)
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radio_passthrough_to_motors();
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const float dt = (tnow_ms - last_radio_update_ms)*1.0e-3f;
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rc_throttle_control_in_filter.apply(channel_throttle->get_control_in(), dt);
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last_radio_update_ms = tnow_ms;
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return;
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}
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// No radio input this time
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if (failsafe.radio) {
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// already in failsafe!
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return;
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}
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const uint32_t elapsed = tnow_ms - last_radio_update_ms;
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// turn on throttle failsafe if no update from the RC Radio for 500ms or 2000ms if we are using RC_OVERRIDE
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const uint32_t timeout = RC_Channels::has_active_overrides() ? FS_RADIO_RC_OVERRIDE_TIMEOUT_MS : FS_RADIO_TIMEOUT_MS;
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if (elapsed < timeout) {
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// not timed out yet
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return;
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}
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if (!g.failsafe_throttle) {
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// throttle failsafe not enabled
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return;
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}
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if (!ap.rc_receiver_present && !motors->armed()) {
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// we only failsafe if we are armed OR we have ever seen an RC receiver
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return;
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}
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// Nobody ever talks to us. Log an error and enter failsafe.
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AP::logger().Write_Error(LogErrorSubsystem::RADIO, LogErrorCode::RADIO_LATE_FRAME);
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set_failsafe_radio(true);
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}
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#define FS_COUNTER 3 // radio failsafe kicks in after 3 consecutive throttle values below failsafe_throttle_value
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void Copter::set_throttle_and_failsafe(uint16_t throttle_pwm)
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{
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// if failsafe not enabled pass through throttle and exit
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if(g.failsafe_throttle == FS_THR_DISABLED) {
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return;
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}
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//check for low throttle value
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if (throttle_pwm < (uint16_t)g.failsafe_throttle_value) {
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// if we are already in failsafe or motors not armed pass through throttle and exit
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if (failsafe.radio || !(ap.rc_receiver_present || motors->armed())) {
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return;
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}
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// check for 3 low throttle values
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// Note: we do not pass through the low throttle until 3 low throttle values are received
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failsafe.radio_counter++;
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if( failsafe.radio_counter >= FS_COUNTER ) {
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failsafe.radio_counter = FS_COUNTER; // check to ensure we don't overflow the counter
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set_failsafe_radio(true);
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}
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}else{
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// we have a good throttle so reduce failsafe counter
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failsafe.radio_counter--;
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if( failsafe.radio_counter <= 0 ) {
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failsafe.radio_counter = 0; // check to ensure we don't underflow the counter
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// disengage failsafe after three (nearly) consecutive valid throttle values
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if (failsafe.radio) {
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set_failsafe_radio(false);
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}
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}
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// pass through throttle
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}
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}
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#define THROTTLE_ZERO_DEBOUNCE_TIME_MS 400
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// set_throttle_zero_flag - set throttle_zero flag from debounced throttle control
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// throttle_zero is used to determine if the pilot intends to shut down the motors
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// Basically, this signals when we are not flying. We are either on the ground
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// or the pilot has shut down the copter in the air and it is free-falling
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void Copter::set_throttle_zero_flag(int16_t throttle_control)
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{
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static uint32_t last_nonzero_throttle_ms = 0;
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uint32_t tnow_ms = millis();
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// if not using throttle interlock and non-zero throttle and not E-stopped,
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// or using motor interlock and it's enabled, then motors are running,
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// and we are flying. Immediately set as non-zero
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if ((!ap.using_interlock && (throttle_control > 0) && !SRV_Channels::get_emergency_stop()) ||
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(ap.using_interlock && motors->get_interlock()) ||
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ap.armed_with_switch) {
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last_nonzero_throttle_ms = tnow_ms;
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ap.throttle_zero = false;
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} else if (tnow_ms - last_nonzero_throttle_ms > THROTTLE_ZERO_DEBOUNCE_TIME_MS) {
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ap.throttle_zero = true;
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}
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}
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// pass pilot's inputs to motors library (used to allow wiggling servos while disarmed on heli, single, coax copters)
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void Copter::radio_passthrough_to_motors()
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{
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motors->set_radio_passthrough(channel_roll->norm_input(),
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channel_pitch->norm_input(),
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channel_throttle->get_control_in_zero_dz()*0.001f,
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channel_yaw->norm_input());
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}
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/*
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return the throttle input for mid-stick as a control-in value
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*/
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int16_t Copter::get_throttle_mid(void)
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{
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#if TOY_MODE_ENABLED == ENABLED
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if (g2.toy_mode.enabled()) {
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return g2.toy_mode.get_throttle_mid();
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}
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#endif
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return channel_throttle->get_control_mid();
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}
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