feat: set single servo position

Author: eigen-value

arduino_alvik/arduino_alvik.py

@@ -29,6 +29,9 @@ def __init__(self):
         self._packeter = ucPack(200)
         self.left_wheel = _ArduinoAlvikWheel(self._packeter, ord('L'))
         self.right_wheel = _ArduinoAlvikWheel(self._packeter, ord('R'))
+        self._servo_positions = list((None, None,))
+        self.servo_A = _ArduinoAlvikServo(self._packeter, 'A', 0, self._servo_positions)
+        self.servo_B = _ArduinoAlvikServo(self._packeter, 'B', 1, self._servo_positions)
         self._led_state = list((None,))
         self.left_led = self.DL1 = _ArduinoAlvikRgbLed(self._packeter, 'left', self._led_state,
                                                        rgb_mask=[0b00000100, 0b00001000, 0b00010000])
@@ -195,6 +198,7 @@ def begin(self) -> int:
         self.set_illuminator(True)
         self.set_behaviour(1)
         self._set_color_reference()
+        self.set_servo_positions(0, 0)
         return 0
 
     def _has_events_registered(self) -> bool:
@@ -508,6 +512,8 @@ def set_servo_positions(self, a_position: int, b_position: int):
         :param b_position: position of B servomotor (0-180)
         :return:
         """
+        self._servo_positions[0] = a_position
+        self._servo_positions[1] = b_position
         self._packeter.packetC2B(ord('S'), a_position & 0xFF, b_position & 0xFF)
         uart.write(self._packeter.msg[0:self._packeter.msg_size])
 
@@ -1223,6 +1229,25 @@ def _stop_events_thread(cls):
         cls._events_thread_running = False
 
 
+class _ArduinoAlvikServo:
+
+    def __init__(self, packeter: ucPack, label: str, servo_id: int, position: list[int | None]):
+        self._packeter = packeter
+        self._label = label
+        self._id = servo_id
+        self._position = position
+
+    def set_position(self, position):
+        """
+        Sets the position of the servo
+        :param position:
+        :return:
+        """
+        self._position[self._id] = position
+        self._packeter.packetC2B(ord('S'), self._position[0] & 0xFF, self._position[1] & 0xFF)
+        uart.write(self._packeter.msg[0:self._packeter.msg_size])
+
+
 class _ArduinoAlvikWheel:
 
     def __init__(self, packeter: ucPack, label: int, wheel_diameter_mm: float = WHEEL_DIAMETER_MM):

examples/set_servo.py

@@ -0,0 +1,22 @@
+from arduino_alvik import ArduinoAlvik
+from time import sleep_ms
+import sys
+
+alvik = ArduinoAlvik()
+alvik.begin()
+
+i = 0
+
+while True:
+    try:
+
+        alvik.servo_A.set_position(i)
+        alvik.servo_B.set_position(i)
+
+        i = (i + 1) % 180
+
+        sleep_ms(100)
+    except KeyboardInterrupt as e:
+        print('over')
+        alvik.stop()
+        sys.exit()