ardupilot/libraries/AP_Gripper/AP_Gripper.cpp

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#include "AP_Gripper.h"
#include "AP_Gripper_Servo.h"
#include "AP_Gripper_EPM.h"
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extern const AP_HAL::HAL& hal;
#define GRIPPER_GRAB_PWM_DEFAULT 1900
#define GRIPPER_RELEASE_PWM_DEFAULT 1100
// EPM PWM definitions
#define GRIPPER_NEUTRAL_PWM_DEFAULT 1500
#define GRIPPER_REGRAB_DEFAULT 0 // default re-grab interval (in seconds) to ensure cargo is securely held
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const AP_Param::GroupInfo AP_Gripper::var_info[] = {
// @Param: ENABLE
// @DisplayName: Gripper Enable/Disable
// @Description: Gripper enable/disable
// @User: Standard
// @Values: 0:Disabled, 1:Enabled
AP_GROUPINFO_FLAGS("ENABLE", 0, AP_Gripper, _enabled, 0, AP_PARAM_FLAG_ENABLE),
// @Param: TYPE
// @DisplayName: Gripper Type
// @Description: Gripper enable/disable
// @User: Standard
// @Values: 0:None,1:Servo,2:EPM
AP_GROUPINFO("TYPE", 1, AP_Gripper, config.type, 0),
// @Param: GRAB
// @DisplayName: Gripper Grab PWM
// @Description: PWM value sent to Gripper to initiate grabbing the cargo
// @User: Advanced
// @Range: 1000 2000
AP_GROUPINFO("GRAB", 2, AP_Gripper, config.grab_pwm, GRIPPER_GRAB_PWM_DEFAULT),
// @Param: RELEASE
// @DisplayName: Gripper Release PWM
// @Description: PWM value sent to Gripper to release the cargo
// @User: Advanced
// @Range: 1000 2000
AP_GROUPINFO("RELEASE", 3, AP_Gripper, config.release_pwm, GRIPPER_RELEASE_PWM_DEFAULT),
// @Param: NEUTRAL
// @DisplayName: Neutral PWM
// @Description: PWM value sent to grabber when not grabbing or releasing
// @User: Advanced
// @Range: 1000 2000
AP_GROUPINFO("NEUTRAL", 4, AP_Gripper, config.neutral_pwm, GRIPPER_NEUTRAL_PWM_DEFAULT),
// @Param: REGRAB
// @DisplayName: Gripper Regrab interval
// @Description: Time in seconds that gripper will regrab the cargo to ensure grip has not weakened; 0 to disable
// @User: Advanced
// @Values: 0 255
// @Units: seconds
AP_GROUPINFO("REGRAB", 5, AP_Gripper, config.regrab_interval, GRIPPER_REGRAB_DEFAULT),
// @Param: UAVCAN_ID
// @DisplayName: EPM UAVCAN Hardpoint ID
// @Description: Refer to https://docs.zubax.com/opengrab_epm_v3#UAVCAN_interface
// @User: Standard
// @Range: 0 255
AP_GROUPINFO("UAVCAN_ID", 6, AP_Gripper, config.uavcan_hardpoint_id, 0),
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AP_GROUPEND
};
AP_Gripper::AP_Gripper()
{
AP_Param::setup_object_defaults(this, var_info);
}
void AP_Gripper::init()
{
// return immediately if not enabled
if (!_enabled.get()) {
return;
}
switch(config.type.get()) {
case 0:
break;
case 1:
backend = new AP_Gripper_Servo(config);
break;
case 2:
backend = new AP_Gripper_EPM(config);
break;
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default:
break;
}
if (backend != nullptr) {
backend->init();
}
}
// update - should be called at at least 10hz
#define PASS_TO_BACKEND(function_name) \
void AP_Gripper::function_name() \
{ \
if (!enabled()) { \
return; \
} \
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if (backend != nullptr) { \
backend->function_name(); \
} \
}
PASS_TO_BACKEND(grab)
PASS_TO_BACKEND(release)
PASS_TO_BACKEND(update)
#undef PASS_TO_BACKEND
#define PASS_TO_BACKEND(function_name) \
bool AP_Gripper::function_name() const \
{ \
if (!enabled()) { \
return false; \
} \
if (backend != nullptr) { \
return backend->function_name(); \
} \
return false; \
}
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PASS_TO_BACKEND(valid)
PASS_TO_BACKEND(released)
PASS_TO_BACKEND(grabbed)
#undef PASS_TO_BACKEND