ardupilot/APMrover2/radio.cpp

216 lines
6.8 KiB
C++

#include "Rover.h"
/*
allow for runtime change of control channel ordering
*/
void Rover::set_control_channels(void)
{
// check change on RCMAP
channel_steer = RC_Channels::rc_channel(rcmap.roll()-1);
channel_throttle = RC_Channels::rc_channel(rcmap.throttle()-1);
channel_learn = RC_Channels::rc_channel(g.learn_channel-1);
// set rc channel ranges
channel_steer->set_angle(SERVO_MAX);
channel_throttle->set_angle(100);
// Allow to reconfigure ouput when not armed
if (!arming.is_armed()) {
g2.motors.setup_servo_output();
// For a rover safety is TRIM throttle
g2.motors.setup_safety_output();
}
// setup correct scaling for ESCs like the UAVCAN PX4ESC which
// take a proportion of speed. Default to 1000 to 2000 for systems without
// a k_throttle output
hal.rcout->set_esc_scaling(1000, 2000);
g2.servo_channels.set_esc_scaling_for(SRV_Channel::k_throttle);
}
void Rover::init_rc_in()
{
// set rc dead zones
channel_steer->set_default_dead_zone(30);
channel_throttle->set_default_dead_zone(30);
}
void Rover::init_rc_out()
{
// set auxiliary ranges
update_aux();
}
/*
check for driver input on rudder/steering stick for arming/disarming
*/
void Rover::rudder_arm_disarm_check()
{
// In Rover we need to check that its set to the throttle trim and within the DZ
// if throttle is not within trim dz, then pilot cannot rudder arm/disarm
if (!channel_throttle->in_trim_dz()) {
rudder_arm_timer = 0;
return;
}
// if not in a manual throttle mode then disallow rudder arming/disarming
if (control_mode->auto_throttle()) {
rudder_arm_timer = 0;
return;
}
if (!arming.is_armed()) {
// when not armed, full right rudder starts arming counter
if (channel_steer->get_control_in() > 4000) {
const uint32_t now = millis();
if (rudder_arm_timer == 0 ||
now - rudder_arm_timer < 3000) {
if (rudder_arm_timer == 0) {
rudder_arm_timer = now;
}
} else {
// time to arm!
arm_motors(AP_Arming::RUDDER);
rudder_arm_timer = 0;
}
} else {
// not at full right rudder
rudder_arm_timer = 0;
}
} else if (!motor_active() & !g2.motors.have_skid_steering()) {
// when armed and motor not active (not moving), full left rudder starts disarming counter
// This is disabled for skid steering otherwise when tring to turn a skid steering rover around
// the rover would disarm
if (channel_steer->get_control_in() < -4000) {
const uint32_t now = millis();
if (rudder_arm_timer == 0 ||
now - rudder_arm_timer < 3000) {
if (rudder_arm_timer == 0) {
rudder_arm_timer = now;
}
} else {
// time to disarm!
disarm_motors();
rudder_arm_timer = 0;
}
} else {
// not at full left rudder
rudder_arm_timer = 0;
}
}
}
void Rover::read_radio()
{
if (!hal.rcin->new_input()) {
// check if we lost RC link
control_failsafe(channel_throttle->get_radio_in());
return;
}
failsafe.last_valid_rc_ms = AP_HAL::millis();
// read the RC value
RC_Channels::set_pwm_all();
// check that RC value are valid
control_failsafe(channel_throttle->get_radio_in());
// apply RC skid steer mixing
if (g.skid_steer_in) {
// convert the two radio_in values from skid steering values
/*
mixing rule:
steering = motor1 - motor2
throttle = 0.5*(motor1 + motor2)
motor1 = throttle + 0.5*steering
motor2 = throttle - 0.5*steering
*/
const float left_input = channel_steer->norm_input();
const float right_input = channel_throttle->norm_input();
const float throttle_scaled = 0.5f * (left_input + right_input);
float steering_scaled = constrain_float(left_input - right_input,-1.0f,1.0f);
// flip the steering direction if requesting the vehicle reverse (to be consistent with separate steering-throttle frames)
if (is_negative(throttle_scaled)) {
steering_scaled = -steering_scaled;
}
int16_t steer = channel_steer->get_radio_trim();
int16_t thr = channel_throttle->get_radio_trim();
if (steering_scaled > 0.0f) {
steer += steering_scaled * (channel_steer->get_radio_max() - channel_steer->get_radio_trim());
} else {
steer += steering_scaled * (channel_steer->get_radio_trim() - channel_steer->get_radio_min());
}
if (throttle_scaled > 0.0f) {
thr += throttle_scaled * (channel_throttle->get_radio_max() - channel_throttle->get_radio_trim());
} else {
thr += throttle_scaled * (channel_throttle->get_radio_trim() - channel_throttle->get_radio_min());
}
channel_steer->set_pwm(steer);
channel_throttle->set_pwm(thr);
}
// check if we try to do RC arm/disarm
rudder_arm_disarm_check();
}
void Rover::control_failsafe(uint16_t pwm)
{
if (!g.fs_throttle_enabled) {
// no throttle failsafe
return;
}
// Check for failsafe condition based on loss of GCS control
if (rc_override_active) {
failsafe_trigger(FAILSAFE_EVENT_RC, (millis() - failsafe.rc_override_timer) > 1500);
} else if (g.fs_throttle_enabled) {
bool failed = pwm < static_cast<uint16_t>(g.fs_throttle_value);
if (AP_HAL::millis() - failsafe.last_valid_rc_ms > 2000) {
failed = true;
}
failsafe_trigger(FAILSAFE_EVENT_THROTTLE, failed);
}
}
/*
return true if throttle level is below throttle failsafe threshold
or RC input is invalid
*/
bool Rover::throttle_failsafe_active(void)
{
if (!g.fs_throttle_enabled) {
return false;
}
if (millis() - failsafe.last_valid_rc_ms > 1000) {
// we haven't had a valid RC frame for 1 seconds
return true;
}
if (channel_throttle->get_reverse()) {
return channel_throttle->get_radio_in() >= g.fs_throttle_value;
}
return channel_throttle->get_radio_in() <= g.fs_throttle_value;
}
void Rover::trim_control_surfaces()
{
read_radio();
// Store control surface trim values
// ---------------------------------
if (channel_steer->get_radio_in() > 1400) {
channel_steer->set_radio_trim(channel_steer->get_radio_in());
// save to eeprom
channel_steer->save_eeprom();
}
}
void Rover::trim_radio()
{
for (int y = 0; y < 30; y++) {
read_radio();
}
trim_control_surfaces();
}