Merge pull request #31 from SHC-ASTRA/can-refactor

Refactor anchor & add direct CAN connector

README.md

@@ -60,6 +60,33 @@ $ ros2 launch anchor_pkg rover.launch.py  # Must be run on a computer connected
 $ ros2 run headless_pkg headless_full  # Optionally run in a separate shell on the same or different computer.
 ```
 
+### Using the Mock Connector
+
+Anchor provides a mock connector meant for testing and scripting purposes. You can select the mock connector by running anchor with this command:
+
+```bash
+$ ros2 launch anchor_pkg rover.launch.py connector:="mock"
+```
+
+To see all data that would be sent over the CAN network (and thus to the microcontrollers), use this command:
+
+```bash
+$ ros2 topic echo /anchor/to_vic/debug
+```
+
+To send data to the mock connector (as if you were a ROS2 node), use the normal relay topic:
+
+```bash
+$ ros2 topic pub /anchor/to_vic/relay astra_msgs/msg/VicCAN '{mcu_name: "core", command_id: 50, data: [0.0, 2.0, 0.0, 1.0]}'
+
+```
+
+To send data to the mock connector (as if you were a microcontroller), publish to the dedicated topic:
+
+```bash
+$ ros2 topic pub /anchor/from_vic/mock_mcu astra_msgs/msg/VicCAN '{mcu_name: "arm", command_id: 55, data: [0.0, 450.0, 900.0, 0.0]}'
+```
+
 ### Testing Serial
 
 You can fake the presence of a Serial device (i.e., MCU) by using the following command:
@@ -68,10 +95,31 @@ You can fake the presence of a Serial device (i.e., MCU) by using the following
 $ socat -dd -v pty,rawer,crnl,link=/tmp/ttyACM9 pty,rawer,crnl,link=/tmp/ttyOUT
 ```
 
-When you go to run anchor, use the `PORT_OVERRIDE` environment variable to point it to the fake serial port, like so:
+When you go to run anchor, use the `serial_override` ROS2 parameter to point it to the fake serial port, like so:
 
 ```bash
-$ PORT_OVERRIDE=/tmp/ttyACM9 ros2 launch anchor_pkg rover.launch.py
+$ ros2 launch anchor_pkg rover.launch.py connector:=serial serial_override:=/tmp/ttyACM9
+```
+
+### Testing CAN
+
+You can create a virtual CAN network by using the following commands to create and then enable it:
+
+```bash
+sudo ip link add dev vcan0 type vcan
+sudo ip link set vcan0 up
+```
+
+When you go to run anchor, use the `can_override` ROS2 parameter to point it to the virtual CAN network, like so:
+
+```bash
+$ ros2 launch anchor_pkg rover.launch.py connector:=can can_override:=vcan0
+```
+
+Once you're done, you should delete the virtual network so that anchor doesn't get confused if you plug in a real CAN adapter:
+
+```bash
+$ sudo ip link delete vcan0
 ```
 
 ### Connecting the GuliKit Controller

flake.lock

@@ -60,7 +60,8 @@
         "nixpkgs": [
           "nix-ros-overlay",
           "nixpkgs"
-        ]
+        ],
+        "treefmt-nix": "treefmt-nix"
       }
     },
     "systems": {
@@ -77,6 +78,26 @@
         "repo": "default",
         "type": "github"
       }
+    },
+    "treefmt-nix": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1773297127,
+        "narHash": "sha256-6E/yhXP7Oy/NbXtf1ktzmU8SdVqJQ09HC/48ebEGBpk=",
+        "owner": "numtide",
+        "repo": "treefmt-nix",
+        "rev": "71b125cd05fbfd78cab3e070b73544abe24c5016",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "treefmt-nix",
+        "type": "github"
+      }
     }
   },
   "root": "root",

flake.nix

@@ -4,6 +4,11 @@
   inputs = {
     nix-ros-overlay.url = "github:lopsided98/nix-ros-overlay/develop";
     nixpkgs.follows = "nix-ros-overlay/nixpkgs"; # IMPORTANT!!!
+
+    treefmt-nix = {
+      url = "github:numtide/treefmt-nix";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
   };
 
   outputs =
@@ -11,7 +16,8 @@
       self,
       nix-ros-overlay,
       nixpkgs,
-    }:
+      ...
+    }@inputs:
     nix-ros-overlay.inputs.flake-utils.lib.eachDefaultSystem (
       system:
       let
@@ -28,6 +34,7 @@
             (python313.withPackages (
               p: with p; [
                 pyserial
+                python-can
                 pygame
                 scipy
                 crccheck
@@ -61,7 +68,7 @@
                   moveit-msgs
                   moveit-ros-planning
                   moveit-ros-planning-interface
-		  moveit-ros-visualization
+                  moveit-ros-visualization
                   moveit-configs-utils
                   moveit-ros-move-group
                   moveit-servo
@@ -72,7 +79,7 @@
                   ompl
                   joy
                   ros2-controllers
-		  chomp-motion-planner
+                  chomp-motion-planner
                 ];
               }
             )
@@ -83,6 +90,8 @@
             export QT_X11_NO_MITSHM=1
           '';
         };
+
+        formatter = (inputs.treefmt-nix.lib.evalModule pkgs ./treefmt.nix).config.build.wrapper;
       }
     );
 

src/anchor_pkg/anchor_pkg/anchor_node.py

@@ -1,28 +1,24 @@
+from warnings import deprecated
 import rclpy
 from rclpy.node import Node
 from rclpy.executors import ExternalShutdownException
-from std_srvs.srv import Empty
+from rcl_interfaces.msg import ParameterDescriptor, ParameterType
 
-import signal
-import time
 import atexit
 
-import serial
+from .connector import (
-import serial.tools.list_ports
+    Connector,
-import os
+    MockConnector,
-import sys
+    SerialConnector,
+    CANConnector,
+    NoValidDeviceException,
+    NoWorkingDeviceException,
+)
+from .convert import string_to_viccan
 import threading
-import glob
 
-from std_msgs.msg import String, Header
 from astra_msgs.msg import VicCAN
-
+from std_msgs.msg import String
-KNOWN_USBS = [
-    (0x2E8A, 0x00C0),  # Raspberry Pi Pico
-    (0x1A86, 0x55D4),  # Adafruit Feather ESP32 V2
-    (0x10C4, 0xEA60),  # DOIT ESP32 Devkit V1
-    (0x1A86, 0x55D3),  # ESP32 S3 Development Board
-]
 
 
 class Anchor(Node):
@@ -36,308 +32,204 @@ class Anchor(Node):
         - VicCAN messages for Arm node
     * /anchor/from_vic/bio
         - VicCAN messages for Bio node
+    * /anchor/to_vic/debug
+        - A string copy of the messages published to ./relay are published here
 
     Subscribers:
     * /anchor/from_vic/mock_mcu
-        - For testing without an actual MCU, publish strings here as if they came from an MCU
+        - For testing without an actual MCU, publish ViCAN messages here as if they came from an MCU
     * /anchor/to_vic/relay
         - Core, Arm, and Bio publish VicCAN messages to this topic to send to the MCU
     * /anchor/to_vic/relay_string
-        - Publish raw strings to this topic to send directly to the MCU for debugging
+        - Send raw strings to connectors. Does not work for connectors that require conversion (like CANConnector)
+    * /anchor/relay
+        - Legacy method for talking to connectors. Takes String as input, but does not send the raw strings to connectors.
+          Instead, it converts them to VicCAN messages first.
     """
 
+    connector: Connector
+
     def __init__(self):
-        # Initalize node with name
+        super().__init__("anchor_node")
-        super().__init__("anchor_node")  # previously 'serial_publisher'
 
-        self.serial_port: str | None = None  # e.g., "/dev/ttyUSB0"
+        logger = self.get_logger()
 
-        # Serial port override
+        # ROS2 Parameter Setup
-        if port_override := os.getenv("PORT_OVERRIDE"):
-            self.serial_port = port_override
 
-        ##################################################
+        self.declare_parameter(
-        # Serial MCU Discovery
+            "connector",
+            "auto",
+            ParameterDescriptor(
+                name="connector",
+                description="Declares which MCU connector should be used. Defaults to 'auto'.",
+                type=ParameterType.PARAMETER_STRING,
+                additional_constraints="Must be 'serial', 'can', 'mock', or 'auto'.",
+            ),
+        )
 
-        # If there was not a port override, look for a MCU over USB for Serial.
+        self.declare_parameter(
-        if self.serial_port is None:
+            "can_override",
-            comports = serial.tools.list_ports.comports()
+            "",
-            real_ports = list(
+            ParameterDescriptor(
-                filter(
+                name="can_override",
-                    lambda p: p.vid is not None
+                description="Overrides which CAN channel will be used. Defaults to ''.",
-                    and p.pid is not None
+                type=ParameterType.PARAMETER_STRING,
-                    and p.device is not None,
+                additional_constraints="Must be a valid CAN network that shows up in `ip link show`.",
-                    comports,
+            ),
+        )
+
+        self.declare_parameter(
+            "serial_override",
+            "",
+            ParameterDescriptor(
+                name="serial_override",
+                description="Overrides which serial port will be used. Defaults to ''.",
+                type=ParameterType.PARAMETER_STRING,
+                additional_constraints="Must be a valid path to a serial device file that shows up in `ls /dev/tty*`.",
+            ),
+        )
+
+        # Determine which connector to use. Options are Mock, Serial, and CAN
+        connector_select = (
+            self.get_parameter("connector").get_parameter_value().string_value
+        )
+        can_override = (
+            self.get_parameter("can_override").get_parameter_value().string_value
+        )
+        serial_override = (
+            self.get_parameter("serial_override").get_parameter_value().string_value
+        )
+        match connector_select:
+            case "serial":
+                logger.info("using serial connector")
+                self.connector = SerialConnector(
+                    logger, self.get_clock(), serial_override
                 )
-            )
+            case "can":
-            recog_ports = list(filter(lambda p: (p.vid, p.pid) in KNOWN_USBS, comports))
+                logger.info("using CAN connector")
-
+                self.connector = CANConnector(logger, self.get_clock(), can_override)
-            if len(recog_ports) == 1:  # Found singular recognized MCU
+            case "mock":
-                found_port = recog_ports[0]
+                logger.info("using mock connector")
-                self.get_logger().info(
+                self.connector = MockConnector(logger, self.get_clock())
-                    f"Selecting MCU '{found_port.description}' at {found_port.device}."
+            case "auto":
+                logger.info("automatically determining connector")
+                try:
+                    logger.info("trying CAN connector")
+                    self.connector = CANConnector(
+                        logger, self.get_clock(), can_override
+                    )
+                except (NoValidDeviceException, NoWorkingDeviceException, TypeError):
+                    logger.info("CAN connector failed, trying serial connector")
+                    self.connector = SerialConnector(
+                        logger, self.get_clock(), serial_override
+                    )
+            case _:
+                logger.fatal(
+                    f"invalid value for connector parameter: {connector_select}"
                 )
-                self.serial_port = found_port.device  # String, location of device file; e.g., '/dev/ttyACM0'
+                exit(1)
-            elif len(recog_ports) > 1:  # Found multiple recognized MCUs
-                # Kinda jank log message
-                self.get_logger().error(
-                    f"Found multiple recognized MCUs: {[p.device for p in recog_ports].__str__()}"
-                )
-                # Don't set self.serial_port; later if-statement will exit()
-            elif (
-                len(recog_ports) == 0 and len(real_ports) > 0
-            ):  # Found real ports but none recognized; i.e. maybe found an IMU or camera but not a MCU
-                self.get_logger().error(
-                    f"No recognized MCUs found; instead found {[p.device for p in real_ports].__str__()}."
-                )
-                # Don't set self.serial_port; later if-statement will exit()
-            else:  # Found jack shit
-                self.get_logger().error("No valid Serial ports specified or found.")
-                # Don't set self.serial_port; later if-statement will exit()
 
-        # We still don't have a serial port; fall back to legacy discovery (Areeb's code)
-        # Loop through all serial devices on the computer to check for the MCU
-        if self.serial_port is None:
-            self.get_logger().warning("Falling back to legacy MCU discovery...")
-            ports = Anchor.list_serial_ports()
-            for _ in range(4):
-                if self.serial_port is not None:
-                    break
-                for port in ports:
-                    try:
-                        # connect and send a ping command
-                        ser = serial.Serial(port, 115200, timeout=1)
-                        # (f"Checking port {port}...")
-                        ser.write(b"ping\n")
-                        response = ser.read_until(bytes("\n", "utf8"))
-
-                        # if pong is in response, then we are talking with the MCU
-                        if b"pong" in response:
-                            self.serial_port = port
-                            self.get_logger().info(f"Found MCU at {self.serial_port}!")
-                            break
-                    except:
-                        pass
-
-        # If port is still None then we ain't finding no mcu
-        if self.serial_port is None:
-            self.get_logger().error("Unable to find MCU. Exiting...")
-            time.sleep(1)
-            sys.exit(1)
-        # Found a Serial port, try to open it; above code has not officially opened a Serial port
-        else:
-            self.get_logger().debug(
-                f"Attempting to open Serial port '{self.serial_port}'..."
-            )
-            try:
-                self.serial_interface = serial.Serial(
-                    self.serial_port, 115200, timeout=1
-                )
-
-                # Attempt to get name of connected MCU
-                self.serial_interface.write(
-                    b"can_relay_mode,on\n"
-                )  # can_relay_ready,[mcu]
-                mcu_name: str = ""
-                for _ in range(4):
-                    response = self.serial_interface.read_until(bytes("\n", "utf8"))
-                    try:
-                        if b"can_relay_ready" in response:
-                            args: list[str] = response.decode("utf8").strip().split(",")
-                            if len(args) == 2:
-                                mcu_name = args[1]
-                            break
-                    except UnicodeDecodeError:
-                        pass  # ignore malformed responses
-                self.get_logger().info(
-                    f"MCU '{mcu_name}' is ready at '{self.serial_port}'."
-                )
-
-            except serial.SerialException as e:
-                self.get_logger().error(
-                    f"Could not open Serial port '{self.serial_port}' for reason:"
-                )
-                self.get_logger().error(e.strerror)
-                time.sleep(1)
-                sys.exit(1)
-
-        # Close serial port on exit
-        atexit.register(self.cleanup)
-
-        ##################################################
         # ROS2 Topic Setup
 
-        # New pub/sub with VicCAN
+        # Publishers
-        self.fromvic_debug_pub_ = self.create_publisher(
+        self.fromvic_debug_pub_ = self.create_publisher(  # only used by serial
-            String, "/anchor/from_vic/debug", 20
+            String,
+            "/anchor/from_vic/debug",
+            20,
         )
         self.fromvic_core_pub_ = self.create_publisher(
-            VicCAN, "/anchor/from_vic/core", 20
+            VicCAN,
+            "/anchor/from_vic/core",
+            20,
         )
         self.fromvic_arm_pub_ = self.create_publisher(
-            VicCAN, "/anchor/from_vic/arm", 20
+            VicCAN,
+            "/anchor/from_vic/arm",
+            20,
         )
         self.fromvic_bio_pub_ = self.create_publisher(
-            VicCAN, "/anchor/from_vic/bio", 20
+            VicCAN,
+            "/anchor/from_vic/bio",
+            20,
+        )
+        # Debug publisher
+        self.tovic_debug_pub_ = self.create_publisher(
+            VicCAN,
+            "/anchor/to_vic/debug",
+            20,
         )
 
-        self.mock_mcu_sub_ = self.create_subscription(
+        # Subscribers
-            String, "/anchor/from_vic/mock_mcu", self.on_mock_fromvic, 20
-        )
         self.tovic_sub_ = self.create_subscription(
-            VicCAN, "/anchor/to_vic/relay", self.on_relay_tovic_viccan, 20
+            VicCAN,
+            "/anchor/to_vic/relay",
+            self.write_connector,
+            20,
         )
-        self.tovic_debug_sub_ = self.create_subscription(
+        self.tovic_sub_legacy_ = self.create_subscription(
-            String, "/anchor/to_vic/relay_string", self.on_relay_tovic_string, 20
+            String,
+            "/anchor/relay",
+            self.write_connector_legacy,
+            20,
+        )
+        self.mock_mcu_sub_ = self.create_subscription(
+            String,
+            "/anchor/from_vic/mock_mcu",
+            self.relay_fromvic,
+            20,
+        )
+        self.tovic_string_sub_ = self.create_subscription(
+            String,
+            "/anchor/to_vic/relay_string",
+            self.connector.write_raw,
+            20,
         )
 
-        # Create publishers
+        # Close devices on exit
-        self.arm_pub = self.create_publisher(String, "/anchor/arm/feedback", 10)
+        atexit.register(self.cleanup)
-        self.core_pub = self.create_publisher(String, "/anchor/core/feedback", 10)
-        self.bio_pub = self.create_publisher(String, "/anchor/bio/feedback", 10)
-
-        self.debug_pub = self.create_publisher(String, "/anchor/debug", 10)
-
-        # Create a subscriber
-        self.relay_sub = self.create_subscription(
-            String, "/anchor/relay", self.on_relay_tovic_string, 10
-        )
-
-    def read_MCU(self):
-        """Check the USB serial port for new data from the MCU, and publish string to appropriate topics"""
-        try:
-            output = str(self.serial_interface.readline(), "utf8")
-
-            if output:
-                self.relay_fromvic(output)
-                # All output over debug temporarily
-                # self.get_logger().info(f"[MCU] {output}")
-                msg = String()
-                msg.data = output
-                self.debug_pub.publish(msg)
-                if output.startswith("can_relay_fromvic,core"):
-                    self.core_pub.publish(msg)
-                elif output.startswith("can_relay_fromvic,arm") or output.startswith(
-                    "can_relay_fromvic,digit"
-                ):  # digit for voltage readings
-                    self.arm_pub.publish(msg)
-                if output.startswith("can_relay_fromvic,citadel") or output.startswith(
-                    "can_relay_fromvic,digit"
-                ):  # digit for SHT sensor
-                    self.bio_pub.publish(msg)
-                # msg = String()
-                # msg.data = output
-                # self.debug_pub.publish(msg)
-                return
-        except serial.SerialException as e:
-            print(f"SerialException: {e}")
-            print("Closing serial port.")
-            try:
-                if self.serial_interface.is_open:
-                    self.serial_interface.close()
-            except:
-                pass
-            exit(1)
-        except TypeError as e:
-            print(f"TypeError: {e}")
-            print("Closing serial port.")
-            try:
-                if self.serial_interface.is_open:
-                    self.serial_interface.close()
-            except:
-                pass
-            exit(1)
-        except Exception as e:
-            print(f"Exception: {e}")
-            # print("Closing serial port.")
-            # if self.ser.is_open:
-            #     self.ser.close()
-            # exit(1)
-
-    def on_mock_fromvic(self, msg: String):
-        """For testing without an actual MCU, publish strings here as if they came from an MCU"""
-        # self.get_logger().info(f"Got command from mock MCU: {msg}")
-        self.relay_fromvic(msg.data)
-
-    def on_relay_tovic_viccan(self, msg: VicCAN):
-        """Relay a VicCAN message to the MCU"""
-        output: str = f"can_relay_tovic,{msg.mcu_name},{msg.command_id}"
-        for num in msg.data:
-            output += f",{round(num, 7)}"  # limit to 7 decimal places
-        output += "\n"
-        # self.get_logger().info(f"VicCAN relay to MCU: {output}")
-        self.serial_interface.write(bytes(output, "utf8"))
-
-    def relay_fromvic(self, msg: str):
-        """Relay a string message from the MCU to the appropriate VicCAN topic"""
-        self.fromvic_debug_pub_.publish(String(data=msg))
-        parts = msg.strip().split(",")
-        if len(parts) > 0 and parts[0] != "can_relay_fromvic":
-            self.get_logger().debug(f"Ignoring non-VicCAN message: '{msg.strip()}'")
-            return
-
-        # String validation
-        malformed: bool = False
-        malformed_reason: str = ""
-        if len(parts) < 3 or len(parts) > 7:
-            malformed = True
-            malformed_reason = (
-                f"invalid argument count (expected [3,7], got {len(parts)})"
-            )
-        elif parts[1] not in ["core", "arm", "digit", "citadel", "broadcast"]:
-            malformed = True
-            malformed_reason = f"invalid mcu_name '{parts[1]}'"
-        elif not (parts[2].isnumeric()) or int(parts[2]) < 0:
-            malformed = True
-            malformed_reason = f"command_id '{parts[2]}' is not a non-negative integer"
-        else:
-            for x in parts[3:]:
-                try:
-                    float(x)
-                except ValueError:
-                    malformed = True
-                    malformed_reason = f"data '{x}' is not a float"
-                    break
-
-        if malformed:
-            self.get_logger().warning(
-                f"Ignoring malformed from_vic message: '{msg.strip()}'; reason: {malformed_reason}"
-            )
-            return
-
-        # Have valid VicCAN message
-
-        output = VicCAN()
-        output.mcu_name = parts[1]
-        output.command_id = int(parts[2])
-        if len(parts) > 3:
-            output.data = [float(x) for x in parts[3:]]
-        output.header = Header(
-            stamp=self.get_clock().now().to_msg(), frame_id="from_vic"
-        )
-
-        # self.get_logger().info(f"Relaying from MCU: {output}")
-        if output.mcu_name == "core":
-            self.fromvic_core_pub_.publish(output)
-        elif output.mcu_name == "arm" or output.mcu_name == "digit":
-            self.fromvic_arm_pub_.publish(output)
-        elif output.mcu_name == "citadel" or output.mcu_name == "digit":
-            self.fromvic_bio_pub_.publish(output)
-
-    def on_relay_tovic_string(self, msg: String):
-        """Relay a raw string message to the MCU for debugging"""
-        message = msg.data
-        # self.get_logger().info(f"Sending command to MCU: {msg}")
-        self.serial_interface.write(bytes(message, "utf8"))
-
-    @staticmethod
-    def list_serial_ports():
-        return glob.glob("/dev/ttyUSB*") + glob.glob("/dev/ttyACM*")
 
     def cleanup(self):
-        print("Cleaning up before terminating...")
+        self.connector.cleanup()
-        if self.serial_interface.is_open:
+
-            self.serial_interface.close()
+    def read_connector(self):
+        """Check the connector for new data from the MCU, and publish string to appropriate topics"""
+        viccan, raw = self.connector.read()
+
+        if raw:
+            self.fromvic_debug_pub_.publish(String(data=raw))
+
+        if viccan:
+            self.relay_fromvic(viccan)
+
+    def write_connector(self, msg: VicCAN):
+        """Write to the connector and send a copy to /anchor/to_vic/debug"""
+        self.connector.write(msg)
+        self.tovic_debug_pub_.publish(msg)
+
+    @deprecated(
+        "Use /anchor/to_vic/relay or /anchor/to_vic/relay_string instead of /anchor/relay"
+    )
+    def write_connector_legacy(self, msg: String):
+        """Write to the connector by first attempting to convert String to VicCAN"""
+        # please do not reference this code. ~riley
+        for cmd in msg.data.split("\n"):
+            viccan = string_to_viccan(
+                cmd,
+                "anchor",
+                self.get_logger(),
+                self.get_clock().now().to_msg(),
+            )
+            if viccan:
+                self.write_connector(viccan)
+
+    def relay_fromvic(self, msg: VicCAN):
+        """Relay a message from the MCU to the appropriate VicCAN topic"""
+        if msg.mcu_name == "core":
+            self.fromvic_core_pub_.publish(msg)
+        elif msg.mcu_name == "arm" or msg.mcu_name == "digit":
+            self.fromvic_arm_pub_.publish(msg)
+        elif msg.mcu_name == "citadel" or msg.mcu_name == "digit":
+            self.fromvic_bio_pub_.publish(msg)
 
 
 def main(args=None):
@@ -350,16 +242,9 @@ def main(args=None):
 
         rate = anchor_node.create_rate(100)  # 100 Hz -- arbitrary rate
         while rclpy.ok():
-            anchor_node.read_MCU()  # Check the MCU for updates
+            anchor_node.read_connector()  # Check the connector for updates
             rate.sleep()
     except (KeyboardInterrupt, ExternalShutdownException):
         print("Caught shutdown signal, shutting down...")
     finally:
         rclpy.try_shutdown()
-
-
-if __name__ == "__main__":
-    signal.signal(
-        signal.SIGTERM, lambda signum, frame: sys.exit(0)
-    )  # Catch termination signals and exit cleanly
-    main()

src/anchor_pkg/anchor_pkg/connector.py

@@ -0,0 +1,438 @@
+from abc import ABC, abstractmethod
+from astra_msgs.msg import VicCAN
+from rclpy.clock import Clock
+from rclpy.impl.rcutils_logger import RcutilsLogger
+from .convert import string_to_viccan as _string_to_viccan, viccan_to_string
+
+# CAN
+import can
+import can.interfaces.socketcan
+import struct
+
+# Serial
+import serial
+import serial.tools.list_ports
+
+KNOWN_USBS = [
+    (0x2E8A, 0x00C0),  # Raspberry Pi Pico
+    (0x1A86, 0x55D4),  # Adafruit Feather ESP32 V2
+    (0x10C4, 0xEA60),  # DOIT ESP32 Devkit V1
+    (0x1A86, 0x55D3),  # ESP32 S3 Development Board
+]
+BAUD_RATE = 115200
+
+MCU_IDS = [
+    "broadcast",
+    "core",
+    "arm",
+    "digit",
+    "faerie",
+    "citadel",
+    "libs",
+]
+
+
+class NoValidDeviceException(Exception):
+    pass
+
+
+class NoWorkingDeviceException(Exception):
+    pass
+
+
+class MultipleValidDevicesException(Exception):
+    pass
+
+
+class DeviceClosedException(Exception):
+    pass
+
+
+class Connector(ABC):
+    logger: RcutilsLogger
+    clock: Clock
+
+    def string_to_viccan(self, msg: str, mcu_name: str):
+        """function currying so that we do not need to pass logger and clock every time"""
+        return _string_to_viccan(
+            msg,
+            mcu_name,
+            self.logger,
+            self.clock.now().to_msg(),
+        )
+
+    def __init__(self, logger: RcutilsLogger, clock: Clock):
+        self.logger = logger
+        self.clock = clock
+
+    @abstractmethod
+    def read(self) -> tuple[VicCAN | None, str | None]:
+        """
+        Must return a tuple of (VicCAN, debug message or string repr of VicCAN)
+        """
+        pass
+
+    @abstractmethod
+    def write(self, msg: VicCAN):
+        pass
+
+    @abstractmethod
+    def write_raw(self, msg: str):
+        pass
+
+    def cleanup(self):
+        pass
+
+
+class SerialConnector(Connector):
+    port: str
+    mcu_name: str
+    serial_interface: serial.Serial
+
+    def __init__(self, logger: RcutilsLogger, clock: Clock, serial_override: str = ""):
+        super().__init__(logger, clock)
+
+        ports = self._find_ports()
+        mcu_name: str | None = None
+
+        if serial_override:
+            logger.warn(
+                f"using serial_override: `{serial_override}`! this will bypass several checks."
+            )
+            ports = [serial_override]
+            mcu_name = "override"
+
+        if len(ports) <= 0:
+            raise NoValidDeviceException("no valid serial device found")
+        if (l := len(ports)) > 1:
+            raise MultipleValidDevicesException(
+                f"too many ({l}) valid serial devices found"
+            )
+
+        # check each of our ports to make sure one of them is responding
+        port = ports[0]
+        # we might already have a name by now if we overrode earlier
+        mcu_name = mcu_name or self._get_name(port)
+        if not mcu_name:
+            raise NoWorkingDeviceException(
+                f"found {port}, but it did not respond with its name"
+            )
+
+        self.port = port
+        self.mcu_name = mcu_name
+
+        # if we fail at this point, it should crash because we've already tested the port
+        self.serial_interface = serial.Serial(self.port, BAUD_RATE, timeout=1)
+
+    def _find_ports(self) -> list[str]:
+        """
+        Finds all valid ports but does not test them
+
+        returns: all valid ports
+        """
+        comports = serial.tools.list_ports.comports()
+        valid_ports = list(
+            map(  # get just device strings
+                lambda p: p.device,
+                filter(  # make sure we have a known device
+                    lambda p: (p.vid, p.pid) in KNOWN_USBS and p.device is not None,
+                    comports,
+                ),
+            )
+        )
+        self.logger.info(f"found valid MCU ports: [ {', '.join(valid_ports)} ]")
+        return valid_ports
+
+    def _get_name(self, port: str) -> str | None:
+        """
+        Get the name of the MCU (if it works)
+
+        returns: str name of the MCU, None if it doesn't work
+        """
+        # attempt to open the serial port
+        serial_interface: serial.Serial
+        try:
+            self.logger.info(f"asking {port} for its name")
+            serial_interface = serial.Serial(port, BAUD_RATE, timeout=1)
+
+            serial_interface.write(b"can_relay_mode,on\n")
+
+            for i in range(4):
+                self.logger.debug(f"attempt {i + 1} of 4 asking {port} for its name")
+                response = serial_interface.read_until(bytes("\n", "utf8"))
+                try:
+                    if b"can_relay_ready" in response:
+                        args: list[str] = response.decode("utf8").strip().split(",")
+                        if len(args) == 2:
+                            self.logger.info(f"we are talking to {args[1]}")
+                            return args[1]
+                        break
+                except UnicodeDecodeError as e:
+                    self.logger.info(
+                        f"ignoring UnicodeDecodeError when asking for MCU name: {e}"
+                    )
+
+            if serial_interface.is_open:
+                # turn relay mode off if it failed to respond with its name
+                serial_interface.write(b"can_relay_mode,off\n")
+                serial_interface.close()
+        except serial.SerialException as e:
+            self.logger.error(f"SerialException when asking for MCU name: {e}")
+
+        return None
+
+    def read(self) -> tuple[VicCAN | None, str | None]:
+        try:
+            raw = str(self.serial_interface.readline(), "utf8")
+
+            if not raw:
+                return (None, None)
+
+            return (
+                self.string_to_viccan(raw, self.mcu_name),
+                raw,
+            )
+        except serial.SerialException as e:
+            self.logger.error(f"SerialException: {e}")
+            raise DeviceClosedException(f"serial port {self.port} closed unexpectedly")
+        except Exception:
+            return (None, None)  # pretty much no other error matters
+
+    def write(self, msg: VicCAN):
+        self.write_raw(viccan_to_string(msg))
+
+    def write_raw(self, msg: str):
+        self.serial_interface.write(bytes(msg, "utf8"))
+
+    def cleanup(self):
+        self.logger.info(f"closing serial port if open {self.port}")
+        try:
+            if self.serial_interface.is_open:
+                self.serial_interface.close()
+        except Exception as e:
+            self.logger.error(e)
+
+
+class CANConnector(Connector):
+    def __init__(self, logger: RcutilsLogger, clock: Clock, can_override: str):
+        super().__init__(logger, clock)
+
+        self.can_channel: str | None = None
+        self.can_bus: can.BusABC | None = None
+
+        avail = can.interfaces.socketcan.SocketcanBus._detect_available_configs()
+
+        if len(avail) == 0:
+            raise NoValidDeviceException("no CAN interfaces found")
+
+        # filter to busses whose channel matches the can_override
+        if can_override:
+            self.logger.info(f"overrode can interface with {can_override}")
+            avail = list(
+                filter(
+                    lambda b: b.get("channel") == can_override,
+                    avail,
+                )
+            )
+
+        if (l := len(avail)) > 1:
+            channels = ", ".join(str(b.get("channel")) for b in avail)
+            raise MultipleValidDevicesException(
+                f"too many ({l}) CAN interfaces found: [{channels}]"
+            )
+
+        bus = avail[0]
+        self.can_channel = str(bus.get("channel"))
+        self.logger.info(f"found CAN interface '{self.can_channel}'")
+
+        try:
+            self.can_bus = can.Bus(
+                interface="socketcan",
+                channel=self.can_channel,
+                bitrate=1_000_000,
+            )
+        except can.CanError as e:
+            raise NoWorkingDeviceException(
+                f"could not open CAN channel '{self.can_channel}': {e}"
+            )
+
+        if self.can_channel and self.can_channel.startswith("v"):
+            self.logger.warn("CAN interface is likely virtual")
+
+    def read(self) -> tuple[VicCAN | None, str | None]:
+        if not self.can_bus:
+            raise DeviceClosedException("CAN bus not initialized")
+
+        try:
+            message = self.can_bus.recv(timeout=0.0)
+        except can.CanError as e:
+            self.logger.error(f"CAN error while receiving: {e}")
+            raise DeviceClosedException("CAN bus closed unexpectedly")
+
+        if message is None:
+            return (None, None)
+
+        arbitration_id = message.arbitration_id & 0x7FF
+        data_bytes = bytes(message.data)
+
+        mcu_key = (arbitration_id >> 8) & 0b111
+        data_type_key = (arbitration_id >> 6) & 0b11
+        command = arbitration_id & 0x3F
+
+        try:
+            mcu_name = MCU_IDS[mcu_key]
+        except IndexError:
+            self.logger.warn(
+                f"received CAN frame with unknown MCU key {mcu_key}; id=0x{arbitration_id:X}"
+            )
+            return (None, None)
+
+        data: list[float] = []
+
+        try:
+            if data_type_key == 3:
+                data = []
+            elif data_type_key == 0:
+                if len(data_bytes) < 8:
+                    self.logger.warn(
+                        f"received double payload with insufficient length {len(data_bytes)}; dropping frame"
+                    )
+                    return (None, None)
+                (value,) = struct.unpack(">d", data_bytes[:8])
+                data = [float(value)]
+            elif data_type_key == 1:
+                if len(data_bytes) < 8:
+                    self.logger.warn(
+                        f"received float32x2 payload with insufficient length {len(data_bytes)}; dropping frame"
+                    )
+                    return (None, None)
+                v1, v2 = struct.unpack(">ff", data_bytes[:8])
+                data = [float(v1), float(v2)]
+            elif data_type_key == 2:
+                if len(data_bytes) < 8:
+                    self.logger.warn(
+                        f"received int16x4 payload with insufficient length {len(data_bytes)}; dropping frame"
+                    )
+                    return (None, None)
+                i1, i2, i3, i4 = struct.unpack(">hhhh", data_bytes[:8])
+                data = [float(i1), float(i2), float(i3), float(i4)]
+            else:
+                self.logger.warn(
+                    f"received CAN frame with unknown data_type_key {data_type_key}; id=0x{arbitration_id:X}"
+                )
+                return (None, None)
+        except struct.error as e:
+            self.logger.error(f"error unpacking CAN payload: {e}")
+            return (None, None)
+
+        viccan = VicCAN(
+            mcu_name=mcu_name,
+            command_id=int(command),
+            data=data,
+        )
+
+        self.logger.debug(
+            f"received CAN frame id=0x{message.arbitration_id:X}, "
+            f"decoded as VicCAN(mcu_name={viccan.mcu_name}, command_id={viccan.command_id}, data={viccan.data})"
+        )
+
+        return (
+            viccan,
+            f"{viccan.mcu_name},{viccan.command_id},"
+            + ",".join(map(str, list(viccan.data))),
+        )
+
+    def write(self, msg: VicCAN):
+        if not self.can_bus:
+            raise DeviceClosedException("CAN bus not initialized")
+
+        # build 11-bit arbitration ID according to VicCAN spec:
+        # bits 10..8: targeted MCU key
+        # bits 7..6:  data type key
+        # bits 5..0:  command
+
+        # map MCU name to 3-bit key.
+        try:
+            mcu_id = MCU_IDS.index((msg.mcu_name or "").lower())
+        except ValueError:
+            self.logger.error(
+                f"unknown VicCAN mcu_name '{msg.mcu_name}' for CAN frame; dropping message"
+            )
+            return
+
+        # determine data type from length:
+        # 0: double x1, 1: float32 x2, 2: int16 x4, 3: empty
+        match data_len := len(msg.data):
+            case 0:
+                data_type = 3
+                data = bytes()
+            case 1:
+                data_type = 0
+                data = struct.pack(">d", *msg.data)
+            case 2:
+                data_type = 1
+                data = struct.pack(">ff", *msg.data)
+            case 3 | 4:  # 3 gets treated as 4
+                data_type = 2
+                if data_len == 3:
+                    msg.data.append(0)
+                data = struct.pack(">hhhh", *[int(x) for x in msg.data])
+            case _:
+                self.logger.error(
+                    f"unexpected VicCAN data length: {data_len}; dropping message"
+                )
+                return
+
+        # command is limited to 6 bits.
+        command = int(msg.command_id)
+        if command < 0 or command > 0x3F:
+            self.logger.error(
+                f"invalid command_id for CAN frame: {command}; dropping message"
+            )
+            return
+
+        try:
+            can_message = can.Message(
+                arbitration_id=(mcu_id << 8) | (data_type << 6) | command,
+                data=data,
+                is_extended_id=False,
+            )
+        except Exception as e:
+            self.logger.error(f"failed to construct CAN message: {e}")
+            return
+
+        try:
+            self.can_bus.send(can_message)
+            self.logger.debug(
+                f"sent CAN frame id=0x{can_message.arbitration_id:X}, "
+                f"data={list(can_message.data)}"
+            )
+        except can.CanError as e:
+            self.logger.error(f"CAN error while sending: {e}")
+            raise DeviceClosedException("CAN bus closed unexpectedly")
+
+    def write_raw(self, msg: str):
+        self.logger.warn(f"write_raw is not supported for CANConnector. msg: {msg}")
+
+    def cleanup(self):
+        try:
+            if self.can_bus is not None:
+                self.logger.info("shutting down CAN bus")
+                self.can_bus.shutdown()
+        except Exception as e:
+            self.logger.error(e)
+
+
+class MockConnector(Connector):
+    def __init__(self, logger: RcutilsLogger, clock: Clock):
+        super().__init__(logger, clock)
+        # No hardware interface for MockConnector. Publish to `/anchor/from_vic/mock_mcu` instead.
+
+    def read(self) -> tuple[VicCAN | None, str | None]:
+        return (None, None)
+
+    def write(self, msg: VicCAN):
+        pass
+
+    def write_raw(self, msg: str):
+        pass

src/anchor_pkg/anchor_pkg/convert.py

@@ -0,0 +1,65 @@
+from astra_msgs.msg import VicCAN
+from std_msgs.msg import Header
+from builtin_interfaces.msg import Time
+from rclpy.impl.rcutils_logger import RcutilsLogger
+
+
+def string_to_viccan(
+    msg: str, mcu_name: str, logger: RcutilsLogger, time: Time
+) -> VicCAN | None:
+    """
+    Converts the serial string VicCAN format to a ROS2 VicCAN message.
+    Does not fill out the Header of the message.
+    On a failure, it will log at a debug level why it failed and return None.
+    """
+
+    parts: list[str] = msg.strip().split(",")
+
+    # don't need an extra check because len of .split output is always >= 1
+    if not parts[0].startswith("can_relay_"):
+        logger.debug(f"got non-CAN data from {mcu_name}: {msg}")
+        return None
+    elif len(parts) < 3:
+        logger.debug(f"got garbage (not enough parts) CAN data from {mcu_name}: {msg}")
+        return None
+    elif len(parts) > 7:
+        logger.debug(f"got garbage (too many parts) CAN data from {mcu_name}: {msg}")
+        return None
+
+    try:
+        command_id = int(parts[2])
+    except ValueError:
+        logger.debug(
+            f"got garbage (non-integer command id) CAN data from {mcu_name}: {msg}"
+        )
+        return None
+
+    if command_id not in range(64):
+        logger.debug(
+            f"got garbage (wrong command id {command_id}) CAN data from {mcu_name}: {msg}"
+        )
+        return None
+
+    try:
+        return VicCAN(
+            header=Header(
+                stamp=time,
+                frame_id="from_vic",
+            ),
+            mcu_name=parts[1],
+            command_id=command_id,
+            data=[float(x) for x in parts[3:]],
+        )
+    except ValueError:
+        logger.debug(f"got garbage (non-numerical) CAN data from {mcu_name}: {msg}")
+        return None
+
+
+def viccan_to_string(viccan: VicCAN) -> str:
+    """Converts a ROS2 VicCAN message to the serial string VicCAN format."""
+    # make sure we accept 3 digits and treat it as 4
+    if len(viccan.data) == 3:
+        viccan.data.append(0)
+    # go from [ w, x, y, z ] -> ",w,x,y,z" & round to 7 digits max
+    data = "".join([f",{round(val,7)}" for val in viccan.data])
+    return f"can_relay_tovic,{viccan.mcu_name},{viccan.command_id}{data}\n"

src/anchor_pkg/launch/rover.launch.py

@@ -1,138 +1,111 @@
-#!/usr/bin/env python3
-
 from launch import LaunchDescription
-from launch.actions import DeclareLaunchArgument, OpaqueFunction, Shutdown
+from launch.actions import DeclareLaunchArgument, Shutdown
-from launch.substitutions import (
-    LaunchConfiguration,
-    ThisLaunchFileDir,
-    PathJoinSubstitution,
-)
-from launch_ros.actions import Node
 from launch.conditions import IfCondition
-
+from launch.substitutions import LaunchConfiguration
-
+from launch_ros.actions import Node
-# Prevent making __pycache__ directories
-from sys import dont_write_bytecode
-
-dont_write_bytecode = True
-
-
-def launch_setup(context, *args, **kwargs):
-    # Retrieve the resolved value of the launch argument 'mode'
-    mode = LaunchConfiguration("mode").perform(context)
-    nodes = []
-
-    if mode == "anchor":
-        # Launch every node and pass "anchor" as the parameter
-
-        nodes.append(
-            Node(
-                package="arm_pkg",
-                executable="arm",  # change as needed
-                name="arm",
-                output="both",
-                parameters=[{"launch_mode": mode}],
-                on_exit=Shutdown(),
-            )
-        )
-        nodes.append(
-            Node(
-                package="core_pkg",
-                executable="core",  # change as needed
-                name="core",
-                output="both",
-                parameters=[{"launch_mode": mode}],
-                on_exit=Shutdown(),
-            )
-        )
-        nodes.append(
-            Node(
-                package="core_pkg",
-                executable="ptz",  # change as needed
-                name="ptz",
-                output="both",
-                condition=IfCondition(LaunchConfiguration("use_ptz", default="true")),
-                # Currently don't shutdown all nodes if the PTZ node fails, as it is not critical
-                # on_exit=Shutdown()  # Uncomment if you want to shutdown on PTZ failure
-            )
-        )
-        nodes.append(
-            Node(
-                package="bio_pkg",
-                executable="bio",  # change as needed
-                name="bio",
-                output="both",
-                parameters=[{"launch_mode": mode}],
-                on_exit=Shutdown(),
-            )
-        )
-        nodes.append(
-            Node(
-                package="anchor_pkg",
-                executable="anchor",  # change as needed
-                name="anchor",
-                output="both",
-                parameters=[{"launch_mode": mode}],
-                on_exit=Shutdown(),
-            )
-        )
-    elif mode in ["arm", "core", "bio", "ptz"]:
-        # Only launch the node corresponding to the provided mode.
-        if mode == "arm":
-            nodes.append(
-                Node(
-                    package="arm_pkg",
-                    executable="arm",
-                    name="arm",
-                    output="both",
-                    parameters=[{"launch_mode": mode}],
-                    on_exit=Shutdown(),
-                )
-            )
-        elif mode == "core":
-            nodes.append(
-                Node(
-                    package="core_pkg",
-                    executable="core",
-                    name="core",
-                    output="both",
-                    parameters=[{"launch_mode": mode}],
-                    on_exit=Shutdown(),
-                )
-            )
-        elif mode == "bio":
-            nodes.append(
-                Node(
-                    package="bio_pkg",
-                    executable="bio",
-                    name="bio",
-                    output="both",
-                    parameters=[{"launch_mode": mode}],
-                    on_exit=Shutdown(),
-                )
-            )
-        elif mode == "ptz":
-            nodes.append(
-                Node(
-                    package="core_pkg",
-                    executable="ptz",
-                    name="ptz",
-                    output="both",
-                    on_exit=Shutdown(),  # on fail, shutdown if this was the only node to be launched
-                )
-            )
-    else:
-        # If an invalid mode is provided, print an error.
-        print("Invalid mode provided. Choose one of: arm, core, bio, anchor, ptz.")
-
-    return nodes
 
 
 def generate_launch_description():
-    declare_arg = DeclareLaunchArgument(
+    connector = LaunchConfiguration("connector")
-        "mode",
+    serial_override = LaunchConfiguration("serial_override")
-        default_value="anchor",
+    can_override = LaunchConfiguration("can_override")
-        description="Launch mode: arm, core, bio, anchor, or ptz",
+    use_ptz = LaunchConfiguration("use_ptz")
+
+    ld = LaunchDescription()
+
+    # arguments
+    ld.add_action(
+        DeclareLaunchArgument(
+            "connector",
+            default_value="auto",
+            description="Connector parameter for anchor node (default: 'auto')",
+        )
     )
 
-    return LaunchDescription([declare_arg, OpaqueFunction(function=launch_setup)])
+    ld.add_action(
+        DeclareLaunchArgument(
+            "serial_override",
+            default_value="",
+            description="Serial port override parameter for anchor node (default: '')",
+        )
+    )
+
+    ld.add_action(
+        DeclareLaunchArgument(
+            "can_override",
+            default_value="",
+            description="CAN network override parameter for anchor node (default: '')",
+        )
+    )
+
+    ld.add_action(
+        DeclareLaunchArgument(
+            "use_ptz",
+            default_value="true",  # must be string for launch system
+            description="Whether to launch PTZ node (default: true)",
+        )
+    )
+
+    # nodes
+    ld.add_action(
+        Node(
+            package="arm_pkg",
+            executable="arm",
+            name="arm",
+            output="both",
+            parameters=[{"launch_mode": "anchor"}],
+            on_exit=Shutdown(),
+        )
+    )
+
+    ld.add_action(
+        Node(
+            package="core_pkg",
+            executable="core",
+            name="core",
+            output="both",
+            parameters=[{"launch_mode": "anchor"}],
+            on_exit=Shutdown(),
+        )
+    )
+
+    ld.add_action(
+        Node(
+            package="core_pkg",
+            executable="ptz",
+            name="ptz",
+            output="both",
+            condition=IfCondition(use_ptz),
+        )
+    )
+
+    ld.add_action(
+        Node(
+            package="bio_pkg",
+            executable="bio",
+            name="bio",
+            output="both",
+            parameters=[{"launch_mode": "anchor"}],
+            on_exit=Shutdown(),
+        )
+    )
+
+    ld.add_action(
+        Node(
+            package="anchor_pkg",
+            executable="anchor",
+            name="anchor",
+            output="both",
+            parameters=[
+                {
+                    "launch_mode": "anchor",
+                    "connector": connector,
+                    "serial_override": serial_override,
+                    "can_override": can_override,
+                }
+            ],
+            on_exit=Shutdown(),
+        )
+    )
+
+    return ld

src/anchor_pkg/package.xml

@@ -3,13 +3,14 @@
 <package format="3">
   <name>anchor_pkg</name>
   <version>0.0.0</version>
-  <description>TODO: Package description</description>
+  <description>Anchor -- ROS and CAN relay node</description>
-  <maintainer email="tristanmcginnis26@gmail.com">tristan</maintainer>
+  <maintainer email="rjm0037@uah.edu">Riley</maintainer>
   <license>AGPL-3.0-only</license>
 
   <depend>rclpy</depend>
   <depend>common_interfaces</depend>
   <depend>python3-serial</depend>
+  <depend>python3-can</depend>
 
   <build_depend>black</build_depend>
 

src/arm_pkg/arm_pkg/arm_headless.py

@@ -1,279 +0,0 @@
-import rclpy
-from rclpy.node import Node
-
-import pygame
-
-import time
-
-import serial
-import sys
-import threading
-import glob
-import os
-
-from std_msgs.msg import String
-from astra_msgs.msg import ControllerState
-from astra_msgs.msg import ArmManual
-from astra_msgs.msg import ArmIK
-
-
-os.environ["SDL_AUDIODRIVER"] = (
-    "dummy"  # Force pygame to use a dummy audio driver before pygame.init()
-)
-os.environ["SDL_VIDEODRIVER"] = "dummy"  # Prevents pygame from trying to open a display
-
-
-class Headless(Node):
-    def __init__(self):
-        # Initalize node with name
-        super().__init__("arm_headless")
-
-        # Depricated, kept temporarily for reference
-        # self.create_timer(0.20, self.send_controls)#read and send controls
-
-        self.create_timer(0.1, self.send_manual)
-
-        # Create a publisher to publish any output the pico sends
-
-        # Depricated, kept temporarily for reference
-        # self.publisher = self.create_publisher(ControllerState, '/astra/arm/control', 10)
-        self.manual_pub = self.create_publisher(ArmManual, "/arm/control/manual", 10)
-
-        # Create a subscriber to listen to any commands sent for the pico
-
-        # Depricated, kept temporarily for reference
-        # self.subscriber = self.create_subscription(String, '/astra/arm/feedback', self.read_feedback, 10)
-
-        # self.debug_sub = self.create_subscription(String, '/arm/feedback/debug', self.read_feedback, 10)
-
-        self.laser_status = 0
-
-        # Initialize pygame
-        pygame.init()
-
-        # Initialize the gamepad module
-        pygame.joystick.init()
-
-        # Check if any gamepad is connected
-        if pygame.joystick.get_count() == 0:
-            print("No gamepad found.")
-            pygame.quit()
-            exit()
-        for event in pygame.event.get():
-            if event.type == pygame.QUIT:
-                pygame.quit()
-                exit()
-
-        # Initialize the first gamepad, print name to terminal
-        self.gamepad = pygame.joystick.Joystick(0)
-        self.gamepad.init()
-        print(f"Gamepad Found: {self.gamepad.get_name()}")
-        #
-        #
-
-    def run(self):
-        # This thread makes all the update processes run in the background
-        thread = threading.Thread(target=rclpy.spin, args={self}, daemon=True)
-        thread.start()
-
-        try:
-            while rclpy.ok():
-                # Check the pico for updates
-
-                # self.read_feedback()
-                if (
-                    pygame.joystick.get_count() == 0
-                ):  # if controller disconnected, wait for it to be reconnected
-                    print(f"Gamepad disconnected: {self.gamepad.get_name()}")
-
-                    while pygame.joystick.get_count() == 0:
-                        # self.send_controls() #depricated, kept for reference temporarily
-                        self.send_manual()
-                        # self.read_feedback()
-                    self.gamepad = pygame.joystick.Joystick(0)
-                    self.gamepad.init()  # re-initialized gamepad
-                    print(f"Gamepad reconnected: {self.gamepad.get_name()}")
-
-        except KeyboardInterrupt:
-            sys.exit(0)
-
-    def send_manual(self):
-        for event in pygame.event.get():
-            if event.type == pygame.QUIT:
-                pygame.quit()
-                exit()
-        input = ArmManual()
-
-        # Triggers for gripper control
-        if self.gamepad.get_axis(2) > 0:  # left trigger
-            input.gripper = -1
-        elif self.gamepad.get_axis(5) > 0:  # right trigger
-            input.gripper = 1
-
-        # Toggle Laser
-        if self.gamepad.get_button(7):  # Start
-            self.laser_status = 1
-        elif self.gamepad.get_button(6):  # Back
-            self.laser_status = 0
-        input.laser = self.laser_status
-
-        if self.gamepad.get_button(5):  # right bumper, control effector
-
-            # Left stick X-axis for effector yaw
-            if self.gamepad.get_axis(0) > 0:
-                input.effector_yaw = 1
-            elif self.gamepad.get_axis(0) < 0:
-                input.effector_yaw = -1
-
-            # Right stick X-axis for effector roll
-            if self.gamepad.get_axis(3) > 0:
-                input.effector_roll = 1
-            elif self.gamepad.get_axis(3) < 0:
-                input.effector_roll = -1
-
-        else:  # Control arm axis
-            dpad_input = self.gamepad.get_hat(0)
-            input.axis0 = 0
-            if dpad_input[0] == 1:
-                input.axis0 = 1
-            elif dpad_input[0] == -1:
-                input.axis0 = -1
-
-            if self.gamepad.get_axis(0) > 0.15 or self.gamepad.get_axis(0) < -0.15:
-                input.axis1 = round(self.gamepad.get_axis(0))
-
-            if self.gamepad.get_axis(1) > 0.15 or self.gamepad.get_axis(1) < -0.15:
-                input.axis2 = -1 * round(self.gamepad.get_axis(1))
-
-            if self.gamepad.get_axis(4) > 0.15 or self.gamepad.get_axis(4) < -0.15:
-                input.axis3 = -1 * round(self.gamepad.get_axis(4))
-
-            # input.axis1 = -1 * round(self.gamepad.get_axis(0))#left x-axis
-            # input.axis2 = -1 * round(self.gamepad.get_axis(1))#left y-axis
-            # input.axis3 = -1 * round(self.gamepad.get_axis(4))#right y-axis
-
-        # Button Mappings
-        # axis2 -> LT
-        # axis5 -> RT
-        # Buttons0 -> A
-        # Buttons1 -> B
-        # Buttons2 -> X
-        # Buttons3 -> Y
-        # Buttons4 -> LB
-        # Buttons5 -> RB
-        # Buttons6 -> Back
-        # Buttons7 -> Start
-
-        input.linear_actuator = 0
-
-        if pygame.joystick.get_count() != 0:
-
-            self.get_logger().info(
-                f"[Ctrl] {input.axis0}, {input.axis1}, {input.axis2}, {input.axis3}\n"
-            )
-            self.manual_pub.publish(input)
-        else:
-            pass
-
-        pass
-
-    # Depricated, kept temporarily for reference
-    # def send_controls(self):
-
-    #     for event in pygame.event.get():
-    #         if event.type == pygame.QUIT:
-    #             pygame.quit()
-    #             exit()
-    #     input = ControllerState()
-
-    #     input.lt = self.gamepad.get_axis(2)#left trigger
-    #     input.rt = self.gamepad.get_axis(5)#right trigger
-
-    #     #input.lb = self.gamepad.get_button(9)#Value must be converted to bool
-    #     if(self.gamepad.get_button(4)):#left bumper
-    #         input.lb = True
-    #     else:
-    #         input.lb = False
-
-    #     #input.rb = self.gamepad.get_button(10)#Value must be converted to bool
-    #     if(self.gamepad.get_button(5)):#right bumper
-    #         input.rb = True
-    #     else:
-    #         input.rb = False
-
-    #     #input.plus = self.gamepad.get_button(6)#plus button
-    #     if(self.gamepad.get_button(7)):#plus button
-    #         input.plus = True
-    #     else:
-    #         input.plus = False
-
-    #     #input.minus = self.gamepad.get_button(4)#minus button
-    #     if(self.gamepad.get_button(6)):#minus button
-    #         input.minus = True
-    #     else:
-    #         input.minus = False
-
-    #     input.ls_x = round(self.gamepad.get_axis(0),2)#left x-axis
-    #     input.ls_y = round(self.gamepad.get_axis(1),2)#left y-axis
-    #     input.rs_x = round(self.gamepad.get_axis(3),2)#right x-axis
-    #     input.rs_y = round(self.gamepad.get_axis(4),2)#right y-axis
-
-    #     #input.a = self.gamepad.get_button(1)#A button
-    #     if(self.gamepad.get_button(0)):#A button
-    #         input.a = True
-    #     else:
-    #         input.a = False
-    #     #input.b = self.gamepad.get_button(0)#B button
-    #     if(self.gamepad.get_button(1)):#B button
-    #         input.b = True
-    #     else:
-    #         input.b = False
-    #     #input.x = self.gamepad.get_button(3)#X button
-    #     if(self.gamepad.get_button(2)):#X button
-    #         input.x = True
-    #     else:
-    #         input.x = False
-    #     #input.y = self.gamepad.get_button(2)#Y button
-    #     if(self.gamepad.get_button(3)):#Y button
-    #         input.y = True
-    #     else:
-    #         input.y = False
-
-    #     dpad_input = self.gamepad.get_hat(0)#D-pad input
-
-    #     #not using up/down on DPad
-    #     input.d_up = False
-    #     input.d_down = False
-
-    #     if(dpad_input[0] == 1):#D-pad right
-    #         input.d_right = True
-    #     else:
-    #         input.d_right = False
-    #     if(dpad_input[0] == -1):#D-pad left
-    #         input.d_left = True
-    #     else:
-    #         input.d_left = False
-
-    #     if pygame.joystick.get_count() != 0:
-
-    #         self.get_logger().info(f"[Ctrl] Updated Controller State\n")
-
-    #         self.publisher.publish(input)
-    #     else:
-    #         pass
-
-
-def main(args=None):
-    rclpy.init(args=args)
-
-    node = Headless()
-
-    rclpy.spin(node)
-    rclpy.shutdown()
-
-    # tb_bs = BaseStation()
-    # node.run()
-
-
-if __name__ == "__main__":
-    main()

src/arm_pkg/arm_pkg/arm_node.py

@@ -2,6 +2,7 @@ import sys
 import threading
 import signal
 import math
+from warnings import deprecated
 
 import rclpy
 from rclpy.node import Node
@@ -11,7 +12,7 @@ from rclpy import qos
 from std_msgs.msg import String, Header
 from sensor_msgs.msg import JointState
 from control_msgs.msg import JointJog
-from astra_msgs.msg import SocketFeedback, DigitFeedback, ArmManual
+from astra_msgs.msg import SocketFeedback, DigitFeedback, ArmManual  # TODO: Old topics
 from astra_msgs.msg import ArmFeedback, VicCAN, RevMotorState
 
 control_qos = qos.QoSProfile(
@@ -68,7 +69,9 @@ class ArmNode(Node):
         # Parameters
 
         self.declare_parameter("use_old_topics", True)
-        self.use_old_topics = self.get_parameter("use_old_topics").get_parameter_value().bool_value
+        self.use_old_topics = (
+            self.get_parameter("use_old_topics").get_parameter_value().bool_value
+        )
 
         ##################################################
         # Old topics
@@ -85,7 +88,9 @@ class ArmNode(Node):
                 SocketFeedback, "/arm/feedback/socket", 10
             )
             self.arm_feedback = SocketFeedback()
-            self.digit_pub = self.create_publisher(DigitFeedback, "/arm/feedback/digit", 10)
+            self.digit_pub = self.create_publisher(
+                DigitFeedback, "/arm/feedback/digit", 10
+            )
             self.digit_feedback = DigitFeedback()
             self.feedback_timer = self.create_timer(0.25, self.publish_feedback)
 
@@ -110,13 +115,19 @@ class ArmNode(Node):
 
         # Control
 
-        # Manual: /arm/manual_new is published by Servo or Basestation
+        # Manual: /arm/manual/joint_jog is published by Basestation or Headless
-        self.jointjog_pub_ = self.create_subscription(
+        self.man_jointjog_sub_ = self.create_subscription(
-            JointJog, "/arm/manual_new", self.jointjog_callback, qos_profile=control_qos
+            JointJog,
+            "/arm/manual/joint_jog",
+            self.jointjog_callback,
+            qos_profile=control_qos,
         )
         # IK: /joint_commands is published by JointTrajectoryController via topic_based_control
         self.joint_command_sub_ = self.create_subscription(
-            JointState, "/joint_commands", self.joint_command_callback, qos_profile=control_qos
+            JointState,
+            "/joint_commands",
+            self.joint_command_callback,
+            qos_profile=control_qos,
         )
 
         # Feedback
@@ -124,12 +135,12 @@ class ArmNode(Node):
         # Combined Socket and Digit feedback
         self.arm_feedback_pub_ = self.create_publisher(
             ArmFeedback,
-            "/arm/feedback/new_feedback",
+            "/arm/feedback",
             qos_profile=qos.qos_profile_sensor_data,
         )
         # IK arm pose: /joint_states is published from here to topic_based_control
         self.joint_state_pub_ = self.create_publisher(
-            JointState, "joint_states", qos_profile=qos.qos_profile_sensor_data
+            JointState, "/joint_states", qos_profile=qos.qos_profile_sensor_data
         )
 
         ###################################################
@@ -146,12 +157,9 @@ class ArmNode(Node):
         self.saved_joint_state.velocity = [0.0] * len(self.saved_joint_state.name)
 
     def jointjog_callback(self, msg: JointJog):
-        if (
+        if len(msg.joint_names) != len(msg.velocities):
-            len(msg.joint_names) == 0
+            self.get_logger().debug("Ignoring malformed /arm/manual/joint_jog message.")
-            or len(msg.velocities) == 0
+            return
-            or len(msg.joint_names) != len(msg.velocities)
-        ):
-            return  # Malformed message
 
         # Grab velocities from message
         velocities = [
@@ -164,62 +172,51 @@ class ArmNode(Node):
         ]
         # Deadzone
         velocities = [vel if abs(vel) > 0.05 else 0.0 for vel in velocities]
-        # ROS2's rad/s to VicCAN's deg/s*10; don't convert gripper's m/s
-        velocities = [
-            math.degrees(vel) * 10 if i < 6 else vel for i, vel in enumerate(velocities)
-        ]
-        # Axis 2 & 3 URDF direction is inverted
-        velocities[2] = -velocities[2]
-        velocities[3] = -velocities[3]
 
-        # Send Axis 0-3
+        self.send_velocities(velocities, msg.header)
-        self.anchor_tovic_pub_.publish(
+
-            VicCAN(
-                mcu_name="arm", command_id=43, data=velocities[0:3], header=msg.header
-            )
-        )
-        # Send Wrist yaw and roll
-        # TODO: Verify embedded
-        self.anchor_tovic_pub_.publish(
-            VicCAN(
-                mcu_name="digit", command_id=43, data=velocities[4:5], header=msg.header
-            )
-        )
-        # Send End Effector Gripper
-        # TODO: Verify m/s received correctly by embedded
-        self.anchor_tovic_pub_.publish(
-            VicCAN(
-                mcu_name="digit", command_id=26, data=[velocities[6]], header=msg.header
-            )
-        )
         # TODO: use msg.duration
 
     def joint_command_callback(self, msg: JointState):
         if len(msg.position) < 7 and len(msg.velocity) < 7:
+            self.get_logger().debug("Ignoring malformed /joint_command message.")
             return  # command needs either position or velocity for all 7 joints
 
-        # Assumed order: Axis0, Axis1, Axis2, Axis3, Wrist_Yaw, Wrist_Roll, Gripper
+        # Grab velocities from message
-        # TODO: refactor to depend on joint names
-        # Embedded takes deg*10, ROS2 uses Radians
         velocities = [
-            math.degrees(vel) * 10 if abs(vel) > 0.05 else 0.0 for vel in msg.velocity
+            (
+                msg.velocity[msg.name.index(joint_name)]  # type: ignore
+                if joint_name in msg.name
+                else 0.0
+            )
+            for joint_name in self.all_joint_names
         ]
-        # Axis 2 & 3 URDF direction is inverted
-        velocities[2] = -velocities[2]
-        velocities[3] = -velocities[3]
 
-        # Axis 0-3
+        self.send_velocities(velocities, msg.header)
-        arm_cmd = VicCAN(mcu_name="arm", command_id=43, data=velocities[0:3])
-        arm_cmd.header = Header(stamp=self.get_clock().now().to_msg())
-        # Wrist yaw and roll, gripper included for future use when have adequate hardware
-        digit_cmd = VicCAN(mcu_name="digit", command_id=43, data=velocities[4:6])
-        digit_cmd.header = Header(stamp=self.get_clock().now().to_msg())
 
-        self.anchor_tovic_pub_.publish(arm_cmd)
+    def send_velocities(self, velocities: list[float], header: Header):
-        self.anchor_tovic_pub_.publish(digit_cmd)
+        # ROS2's rad/s to VicCAN's deg/s*10; don't convert gripper's m/s
+        velocities = [
+            math.degrees(vel) * 10 if i < 6 else vel for i, vel in enumerate(velocities)
+        ]
 
+        # Send Axis 0-3
+        self.anchor_tovic_pub_.publish(
+            VicCAN(mcu_name="arm", command_id=43, data=velocities[0:3], header=header)
+        )
+        # Send Wrist yaw and roll
+        # TODO: Verify embedded
+        self.anchor_tovic_pub_.publish(
+            VicCAN(mcu_name="digit", command_id=43, data=velocities[4:5], header=header)
+        )
+        # Send End Effector Gripper
+        # TODO: Verify m/s received correctly by embedded
+        self.anchor_tovic_pub_.publish(
+            VicCAN(mcu_name="digit", command_id=26, data=[velocities[6]], header=header)
+        )
+
+    @deprecated("Uses an old message type. Will be removed at some point.")
     def send_manual(self, msg: ArmManual):
-        """TODO: Old"""
         axis0 = msg.axis0
         axis1 = -1 * msg.axis1
         axis2 = msg.axis2
@@ -243,13 +240,13 @@ class ArmNode(Node):
 
         return
 
+    @deprecated("Uses an old message type. Will be removed at some point.")
     def send_cmd(self, msg: str):
-        """TODO: Old"""
         output = String(data=msg)
         self.anchor_pub.publish(output)
 
+    @deprecated("Uses an old message type. Will be removed at some point.")
     def anchor_feedback(self, msg: String):
-        """TODO: Old"""
         output = msg.data
         if output.startswith("can_relay_fromvic,arm,55"):
             self.updateAngleFeedback(output)
@@ -282,8 +279,7 @@ class ArmNode(Node):
             self.process_fromvic_digit(msg)
 
     def process_fromvic_arm(self, msg: VicCAN):
-        if msg.mcu_name != "arm":
+        assert msg.mcu_name == "arm"
-            return
 
         # Check message len to prevent crashing on bad data
         if msg.command_id in self.viccan_socket_msg_len_dict:
@@ -326,12 +322,8 @@ class ArmNode(Node):
                 # Joint state publisher for URDF visualization
                 self.saved_joint_state.position[0] = math.radians(angles[0])  # Axis 0
                 self.saved_joint_state.position[1] = math.radians(angles[1])  # Axis 1
-                self.saved_joint_state.position[2] = math.radians(
+                self.saved_joint_state.position[2] = math.radians(angles[2])  # Axis 2
-                    -angles[2]
+                self.saved_joint_state.position[3] = math.radians(angles[3])  # Axis 3
-                )  # Axis 2 (inverted)
-                self.saved_joint_state.position[3] = math.radians(
-                    -angles[3]
-                )  # Axis 3 (inverted)
                 # Wrist is handled by digit feedback
                 self.saved_joint_state.header.stamp = msg.header.stamp
                 self.joint_state_pub_.publish(self.saved_joint_state)
@@ -363,18 +355,17 @@ class ArmNode(Node):
                     velocities[1]
                 )  # Axis 1
                 self.saved_joint_state.velocity[2] = math.radians(
-                    -velocities[2]
+                    velocities[2]
-                )  # Axis 2 (-)
+                )  # Axis 2
                 self.saved_joint_state.velocity[3] = math.radians(
-                    -velocities[3]
+                    velocities[3]
-                )  # Axis 3 (-)
+                )  # Axis 3
                 # Wrist is handled by digit feedback
                 self.saved_joint_state.header.stamp = msg.header.stamp
                 self.joint_state_pub_.publish(self.saved_joint_state)
 
     def process_fromvic_digit(self, msg: VicCAN):
-        if msg.mcu_name != "digit":
+        assert msg.mcu_name == "digit"
-            return
 
         # Check message len to prevent crashing on bad data
         if msg.command_id in self.viccan_digit_msg_len_dict:
@@ -398,13 +389,13 @@ class ArmNode(Node):
                     msg.data[1]
                 )  # Wrist yaw
 
+    @deprecated("Uses an old message type. Will be removed at some point.")
     def publish_feedback(self):
-        """TODO: Old"""
         self.socket_pub.publish(self.arm_feedback)
         self.digit_pub.publish(self.digit_feedback)
 
+    @deprecated("Uses an old message type. Will be removed at some point.")
     def updateAngleFeedback(self, msg: str):
-        """TODO: Old"""
         # Angle feedbacks,
         # split the msg.data by commas
         parts = msg.split(",")
@@ -422,8 +413,8 @@ class ArmNode(Node):
         else:
             self.get_logger().info("Invalid angle feedback input format")
 
+    @deprecated("Uses an old message type. Will be removed at some point.")
     def updateBusVoltage(self, msg: str):
-        """TODO: Old"""
         # Bus Voltage feedbacks
         parts = msg.split(",")
         if len(parts) >= 7:
@@ -437,8 +428,8 @@ class ArmNode(Node):
         else:
             self.get_logger().info("Invalid voltage feedback input format")
 
+    @deprecated("Uses an old message type. Will be removed at some point.")
     def updateMotorFeedback(self, msg: str):
-        """TODO: Old"""
         parts = str(msg.strip()).split(",")
         motorId = round(float(parts[3]))
         temp = float(parts[4]) / 10.0
@@ -462,15 +453,22 @@ class ArmNode(Node):
             self.arm_feedback.axis0_current = current
 
 
+def exit_handler(signum, frame):
+    print("Caught SIGTERM. Exiting...")
+    rclpy.try_shutdown()
+    sys.exit(0)
+
+
 def main(args=None):
     rclpy.init(args=args)
 
+    # Catch termination signals and exit cleanly
+    signal.signal(signal.SIGTERM, exit_handler)
+
     arm_node = ArmNode()
-    thread = threading.Thread(target=rclpy.spin, args=(arm_node,), daemon=True)
-    thread.start()
 
     try:
-        thread.join()
+        rclpy.spin(arm_node)
     except (KeyboardInterrupt, ExternalShutdownException):
         pass
     finally:
@@ -478,8 +476,4 @@ def main(args=None):
 
 
 if __name__ == "__main__":
-    # signal.signal(signal.SIGTSTP, lambda signum, frame: sys.exit(0))  # Catch Ctrl+Z and exit cleanly
-    signal.signal(
-        signal.SIGTERM, lambda signum, frame: sys.exit(0)
-    )  # Catch termination signals and exit cleanly
     main()

src/arm_pkg/setup.py

@@ -1,27 +1,22 @@
-from setuptools import find_packages, setup
+from setuptools import setup
-import os
-from glob import glob
 
 package_name = "arm_pkg"
 
 setup(
     name=package_name,
     version="1.0.0",
-    packages=find_packages(exclude=["test"]),
+    packages=[package_name],
     data_files=[
         ("share/ament_index/resource_index/packages", ["resource/" + package_name]),
         ("share/" + package_name, ["package.xml"]),
     ],
     install_requires=["setuptools"],
     zip_safe=True,
-    maintainer="tristan",
+    maintainer="David",
-    maintainer_email="tristanmcginnis26@gmail.com",
+    maintainer_email="ds0196@uah.edu",
-    description="TODO: Package description",
+    description="Relays topics related to the arm between VicCAN (through Anchor) and basestation.",
-    license="All Rights Reserved",
+    license="AGPL-3.0-only",
     entry_points={
-        "console_scripts": [
+        "console_scripts": ["arm = arm_pkg.arm_node:main"],
-            "arm = arm_pkg.arm_node:main",
-            "headless = arm_pkg.arm_headless:main",
-        ],
     },
 )

src/core_pkg/core_pkg/core_ptz.py

@@ -262,7 +262,7 @@ class PtzNode(Node):
             f"[{self.get_clock().now().nanoseconds / 1e9:.2f}] PTZ Node: {message_text}"
         )
         self.debug_pub.publish(msg)
-        self.get_logger().info(message_text)
+        self.get_logger().debug(message_text)
 
     def run_async_func(self, coro):
         """Run an async function in the event loop."""

src/headless_pkg/src/headless_node.py

@@ -39,9 +39,9 @@ os.environ["SDL_AUDIODRIVER"] = (
 CORE_STOP_MSG = CoreControl()  # All zeros by default
 CORE_STOP_TWIST_MSG = Twist()  # "
 ARM_STOP_MSG = ArmManual()  # "
-ARM_IK_STOP_MSG = TwistStamped()  # "
 BIO_STOP_MSG = BioControl()  # "
 
+
 control_qos = qos.QoSProfile(
     history=qos.QoSHistoryPolicy.KEEP_LAST,
     depth=2,
@@ -75,15 +75,7 @@ class Headless(Node):
         # Initialize pygame first
         pygame.init()
         pygame.joystick.init()
-        super().__init__("headless")
+        super().__init__("headless_node")
-
-        # TODO: move the STOP_MSGs somewhere better
-        global ARM_STOP_JOG_MSG
-        ARM_STOP_JOG_MSG = JointJog(
-            header=Header(frame_id="base_link", stamp=self.get_clock().now().to_msg()),
-            joint_names=self.all_joint_names,
-            velocities=[0.0] * len(self.all_joint_names),
-        )
 
         ##################################################
         # Preamble
@@ -247,9 +239,9 @@ class Headless(Node):
         else:
             self.core_twist_pub_.publish(CORE_STOP_TWIST_MSG)
             if self.use_arm_ik:
-                self.arm_ik_twist_publisher.publish(ARM_IK_STOP_MSG)
+                self.arm_ik_twist_publisher.publish(self.arm_ik_twist_stop_msg())
             else:
-                self.arm_manual_pub_.publish(ARM_STOP_JOG_MSG)
+                self.arm_manual_pub_.publish(self.arm_manual_stop_msg())
             # TODO: add bio here after implementing new topics
 
     def send_controls(self):
@@ -519,14 +511,12 @@ class Headless(Node):
             # X: _
             # Y: linear actuator out
 
-            ARM_THRESHOLD = 0.2
-
             # Right stick: EF yaw and axis 3
             arm_input.velocities[self.all_joint_names.index("wrist_yaw_joint")] = float(
                 stick_to_arm_direction(right_stick_x)
             )
             arm_input.velocities[self.all_joint_names.index("axis_3_joint")] = float(
-                -1 * stick_to_arm_direction(right_stick_y)
+                stick_to_arm_direction(right_stick_y)
             )
 
             # Left stick: axis 1 and 2
@@ -534,7 +524,7 @@ class Headless(Node):
                 stick_to_arm_direction(left_stick_x)
             )
             arm_input.velocities[self.all_joint_names.index("axis_2_joint")] = float(
-                -1 * stick_to_arm_direction(left_stick_y)
+                stick_to_arm_direction(left_stick_y)
             )
 
             # D-pad: axis 0 and _
@@ -653,6 +643,18 @@ class Headless(Node):
         else:
             pass  # TODO: implement new bio control topics
 
+    def arm_manual_stop_msg(self):
+        return JointJog(
+            header=Header(frame_id="base_link", stamp=self.get_clock().now().to_msg()),
+            joint_names=self.all_joint_names,
+            velocities=[0.0] * len(self.all_joint_names),
+        )
+
+    def arm_ik_twist_stop_msg(self):
+        return TwistStamped(
+            header=Header(frame_id="base_link", stamp=self.get_clock().now().to_msg())
+        )
+
 
 def stick_deadzone(value: float, threshold=STICK_DEADZONE) -> float:
     """Apply a deadzone to a joystick input so the motors don't sound angry"""

treefmt.nix

@@ -0,0 +1,8 @@
+{ pkgs, ... }:
+{
+  projectRootFile = "flake.nix";
+  programs = {
+    nixfmt.enable = true;
+    black.enable = true;
+  };
+}