Enable drivers to accept either pin number or Pin objects

Only affects DVP_RP2_PIO
Add get_pin_number to utils/pins.py

Author: sfe-SparkFro

red_vision/cameras/dvp_rp2_pio.py

@@ -21,6 +21,7 @@
 from machine import Pin, PWM
 from uctypes import addressof
 from ..utils import memory as rv_memory
+from ..utils.pins import get_pin_number
 
 class DVP_RP2_PIO():
     """
@@ -87,7 +88,7 @@ def begin(
         # Initialize DVP pins as inputs
         self._num_data_pins = num_data_pins
         for i in range(num_data_pins):
-            Pin(self._pin_d0+i, Pin.IN)
+            Pin(get_pin_number(self._pin_d0)+i, Pin.IN)
         Pin(self._pin_vsync, Pin.IN)
         Pin(self._pin_hsync, Pin.IN)
         Pin(self._pin_pclk, Pin.IN)
@@ -206,9 +207,9 @@ def _setup_pio(self):
         program = self._pio_read_dvp
 
         # Mask in the GPIO pins
-        program[0][0] |= self._pin_hsync & 0x1F
-        program[0][1] |= self._pin_pclk & 0x1F
-        program[0][3] |= self._pin_pclk & 0x1F
+        program[0][0] |= get_pin_number(self._pin_hsync) & 0x1F
+        program[0][1] |= get_pin_number(self._pin_pclk) & 0x1F
+        program[0][3] |= get_pin_number(self._pin_pclk) & 0x1F
 
         # Mask in the number of data pins
         program[0][2] |= self._num_data_pins

red_vision/utils/pins.py

@@ -10,6 +10,29 @@
 
 from machine import Pin
 
+def get_pin_number(pin):
+    """
+    Gets the GPIO pin number from a Pin object. This works for both
+    standard GPIO pins and board-specific Pin objects.
+
+    Args:
+        pin (Pin): The Pin object to get the number from.
+
+    Returns:
+        int: The GPIO pin number.
+    """
+    if type(pin) is int:
+        return pin
+    elif type(pin) is not Pin:
+        raise TypeError("Expected Pin object or int for pin parameter")
+    # Some boards use board-specific Pin objects that don't have a
+    # `pin.id()` method, so we convert the pin to a string and parse it.
+    # Example formats:
+    # "Pin(GPIO16)"
+    # "Pin(GPIO16, mode=OUT)"
+    pin_str = str(pin)
+    return int(pin_str[pin_str.index("GPIO") + 4:].partition(",")[0].partition(")")[0])
+
 def save_pin_mode_alt(pin):
     """
     Saves the current `mode` and `alt` of the pin so it can be restored