Enhance CAN bus scripts with argparse and error handling

- Improved error handling in `python_enable_motor.py` by capturing and displaying exception details.
- Ensured proper CAN bus shutdown in `python_enable_motor.py` with a `finally` block.
- Refactored `python_send_angle.py` to accept a command-line argument for the target angle instead of looping indefinitely.
- Refactored `python_send_velocity.py` to accept a command-line argument for target speed and removed infinite loops for better usability.
- Added `send_velocity_impulses.py`, a new script to send alternating velocity impulses over the CAN bus.

controller/fw/embed/test/python_send_velocity.py

@@ -1,6 +1,6 @@
 import can
 import struct
-import time
+import argparse
 
 # Function to send the target speed
 def send_target_speed(bus, target_speed):
@@ -17,18 +17,20 @@ def send_target_speed(bus, target_speed):
     except can.CanError:
         print("Message failed to send")
 
+# Main function
 def main():
+    parser = argparse.ArgumentParser(description="Send target speed over CAN bus.")
+    parser.add_argument("--speed", type=float, required=True, help="Target speed to send over the CAN bus (in m/s)")
+    args = parser.parse_args()
+
+    target_speed = args.speed
+
     # CAN interface setup
     bus = can.interface.Bus(channel='can0', bustype='socketcan', bitrate=1000000)  # Ensure the bitrate matches the microcontroller settings
-    print("CAN bus initialized, sending target speeds...")
+    print("CAN bus initialized, sending target speed...")
 
-    # Target speed
-    target_speed = 0.0  # in meters per second
-
-    # Loop to send messages
-    while True:
-        send_target_speed(bus, target_speed)
-        time.sleep(1)  # Delay before sending the next message
+    # Send the message once
+    send_target_speed(bus, target_speed)
 
 if __name__ == '__main__':
     main()