ardupilot/libraries/AP_LandingGear/AP_LandingGear.cpp

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#include "AP_LandingGear.h"
#include <AP_Relay/AP_Relay.h>
#include <AP_Math/AP_Math.h>
#include <SRV_Channel/SRV_Channel.h>
#include <AP_HAL/AP_HAL.h>
extern const AP_HAL::HAL& hal;
const AP_Param::GroupInfo AP_LandingGear::var_info[] = {
// @Param: SERVO_RTRACT
// @DisplayName: Landing Gear Servo Retracted PWM Value
// @Description: Servo PWM value in microseconds when landing gear is retracted
// @Range: 1000 2000
// @Units: PWM
// @Increment: 1
// @User: Standard
AP_GROUPINFO("SERVO_RTRACT", 0, AP_LandingGear, _servo_retract_pwm, AP_LANDINGGEAR_SERVO_RETRACT_PWM_DEFAULT),
// @Param: SERVO_DEPLOY
// @DisplayName: Landing Gear Servo Deployed PWM Value
// @Description: Servo PWM value in microseconds when landing gear is deployed
// @Range: 1000 2000
// @Units: PWM
// @Increment: 1
// @User: Standard
AP_GROUPINFO("SERVO_DEPLOY", 1, AP_LandingGear, _servo_deploy_pwm, AP_LANDINGGEAR_SERVO_DEPLOY_PWM_DEFAULT),
// @Param: STARTUP
// @DisplayName: Landing Gear Startup position
// @Description: Landing Gear Startup behaviour control
// @Values: 0:WaitForPilotInput, 1:Retract, 2:Deploy
// @User: Standard
AP_GROUPINFO("STARTUP", 2, AP_LandingGear, _startup_behaviour, (uint8_t)AP_LandingGear::LandingGear_Startup_WaitForPilotInput),
AP_GROUPEND
};
/// initialise state of landing gear
void AP_LandingGear::init()
{
switch ((enum LandingGearStartupBehaviour)_startup_behaviour.get()) {
default:
case LandingGear_Startup_WaitForPilotInput:
// do nothing
break;
case LandingGear_Startup_Retract:
retract();
break;
case LandingGear_Startup_Deploy:
deploy();
break;
}
}
/// set landing gear position to retract, deploy or deploy-and-keep-deployed
void AP_LandingGear::set_position(LandingGearCommand cmd)
{
switch (cmd) {
case LandingGear_Retract:
retract();
break;
case LandingGear_Deploy:
deploy();
break;
}
}
/// deploy - deploy landing gear
void AP_LandingGear::deploy()
{
// set servo PWM to deployed position
SRV_Channels::set_output_pwm(SRV_Channel::k_landing_gear_control, _servo_deploy_pwm);
// set deployed flag
_deployed = true;
}
/// retract - retract landing gear
void AP_LandingGear::retract()
{
// set servo PWM to retracted position
SRV_Channels::set_output_pwm(SRV_Channel::k_landing_gear_control, _servo_retract_pwm);
// reset deployed flag
_deployed = false;
}