uavcannode: implement hardpoint commands (#26334)

* implement cannode hardpoint commands

Signed-off-by: dirksavage88 <dirksavage88@gmail.com>

* Update src/drivers/uavcannode/Subscribers/HardpointCommand.hpp

Co-authored-by: Jacob Dahl <37091262+dakejahl@users.noreply.github.com>

* Update src/drivers/uavcannode/Subscribers/HardpointCommand.hpp

Co-authored-by: Jacob Dahl <37091262+dakejahl@users.noreply.github.com>

* add hardpoint sub to ark cannode, simplify handling of hardpoint broadcast

Signed-off-by: dirksavage88 <dirksavage88@gmail.com>

---------

Signed-off-by: dirksavage88 <dirksavage88@gmail.com>
Co-authored-by: Jacob Dahl <37091262+dakejahl@users.noreply.github.com>

boards/ark/cannode/default.px4board

@@ -31,6 +31,7 @@ CONFIG_UAVCANNODE_ESC_RAW_COMMAND=y
 CONFIG_UAVCANNODE_ESC_STATUS=y
 CONFIG_UAVCANNODE_FLOW_MEASUREMENT=y
 CONFIG_UAVCANNODE_GNSS_FIX=y
+CONFIG_UAVCANNODE_HARDPOINT_COMMAND=y
 CONFIG_UAVCANNODE_HYGROMETER_MEASUREMENT=y
 CONFIG_UAVCANNODE_LIGHTS_COMMAND=y
 CONFIG_UAVCANNODE_MAGNETIC_FIELD_STRENGTH=y

src/drivers/uavcannode/Kconfig

@@ -34,6 +34,10 @@ if DRIVERS_UAVCANNODE
         bool "Include GNSS fix"
         default n
 
+    config UAVCANNODE_HARDPOINT_COMMAND
+        bool "Include hardpoint commands"
+        default n
+
     config UAVCANNODE_HYGROMETER_MEASUREMENT
         bool "Include hygrometer measurement"
         default n

src/drivers/uavcannode/Subscribers/HardpointCommand.hpp

@@ -0,0 +1,123 @@
+/****************************************************************************
+ *
+ *   Copyright (c) 2026 PX4 Development Team. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name PX4 nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+#pragma once
+
+#include "UavcanSubscriberBase.hpp"
+
+#include <uavcan/equipment/hardpoint/Command.hpp>
+
+#include <uORB/Publication.hpp>
+#include <uORB/topics/actuator_servos.h>
+
+namespace uavcannode
+{
+
+class HardpointCommand;
+
+typedef uavcan::MethodBinder<HardpointCommand *,
+	void (HardpointCommand::*)(const uavcan::ReceivedDataStructure<uavcan::equipment::hardpoint::Command>&)>
+	HardpointCommandBinder;
+
+class HardpointCommand :
+	public UavcanSubscriberBase,
+	private uavcan::Subscriber<uavcan::equipment::hardpoint::Command, HardpointCommandBinder>
+{
+public:
+	HardpointCommand(uavcan::INode &node) :
+		UavcanSubscriberBase(uavcan::equipment::hardpoint::Command::DefaultDataTypeID),
+		uavcan::Subscriber<uavcan::equipment::hardpoint::Command, HardpointCommandBinder>(node)
+	{}
+
+	bool init()
+	{
+		if (start(HardpointCommandBinder(this, &HardpointCommand::callback)) < 0) {
+			PX4_ERR("uavcan::equipment::hardpoint::Command subscription failed");
+			return false;
+		}
+
+		return true;
+	}
+
+	void PrintInfo() const override
+	{
+		printf("\t%s:%d -> %s\n",
+		       uavcan::equipment::hardpoint::Command::getDataTypeFullName(),
+		       uavcan::equipment::hardpoint::Command::DefaultDataTypeID,
+		       _actuator_servos_pub.get_topic()->o_name);
+	}
+
+private:
+	void callback(const uavcan::ReceivedDataStructure<uavcan::equipment::hardpoint::Command> &msg)
+	{
+
+		uint8_t servo_id = msg.hardpoint_id;
+		actuator_servos_s actuator_servos {};
+
+		if (servo_id >= actuator_servos_s::NUM_CONTROLS) {
+			return;
+		}
+
+		for (uint8_t i = servo_id; i < actuator_servos_s::NUM_CONTROLS; ++i) {
+
+			actuator_servos.timestamp = hrt_absolute_time();
+			actuator_servos.timestamp_sample = actuator_servos.timestamp;
+
+			if (msg.command == 1) {
+				actuator_servos.control[i] = 1; // grip
+
+			} else if (msg.command == 0) {
+				actuator_servos.control[i] = -1; // release
+
+			} else {
+				actuator_servos.control[i] = 0; // do nothing
+			}
+
+			actuator_servos.timestamp = hrt_absolute_time();
+			actuator_servos.timestamp_sample = actuator_servos.timestamp;
+
+			// If ID is not 0 (broadcast), do not iterate
+			if (servo_id != 0) {
+				break;
+			}
+
+		}
+
+		_actuator_servos_pub.publish(actuator_servos);
+
+	}
+
+	uORB::Publication<actuator_servos_s> _actuator_servos_pub{ORB_ID(actuator_servos)};
+
+};
+} // namespace uavcannode

src/drivers/uavcannode/UavcanNode.cpp

@@ -121,6 +121,10 @@
 #include "Subscribers/ServoArrayCommand.hpp"
 #endif // CONFIG_UAVCANNODE_SERVO_ARRAY_COMMAND
 
+#if defined(CONFIG_UAVCANNODE_HARDPOINT_COMMAND)
+#include "Subscribers/HardpointCommand.hpp"
+#endif // CONFIG_UAVCANNODE_HARDPOINT_COMMAND
+
 using namespace time_literals;
 
 namespace uavcannode
@@ -485,6 +489,10 @@ int UavcanNode::init(uavcan::NodeID node_id, UAVCAN_DRIVER::BusEvent &bus_events
 	_subscriber_list.add(new ServoArrayCommand(_node));
 #endif // CONFIG_UAVCANNODE_SERVO_ARRAY_COMMAND
 
+#if defined(CONFIG_UAVCANNODE_HARDPOINT_COMMAND)
+	_subscriber_list.add(new HardpointCommand(_node));
+#endif // CONFIG_UAVCANNODE_HARDPOINT_COMMAND
+
 	for (auto &subscriber : _subscriber_list) {
 		subscriber->init();
 	}