initial working feather

[Adafruit_Blinka-hackapet.git] / src / adafruit_blinka / microcontroller / rp2040_u2if / analogio.py

diff --git a/src/adafruit_blinka/microcontroller/rp2040_u2if/analogio.py b/src/adafruit_blinka/microcontroller/rp2040_u2if/analogio.py
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+++ b/src/adafruit_blinka/microcontroller/rp2040_u2if/analogio.py
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+"""
+`analogio` - Analog input and output control
+=================================================
+See `CircuitPython:analogio` in CircuitPython for more details.
+* Author(s): Carter Nelson
+"""
+from adafruit_blinka import ContextManaged
+from .rp2040_u2if import rp2040_u2if
+
+
+class AnalogIn(ContextManaged):
+    """AnalogIn Base Class for RP2040 u2if"""
+
+    def __init__(self, pin):
+        self.pin_id = pin.id
+        rp2040_u2if.adc_init_pin(self.pin_id)
+
+    @property
+    def value(self):
+        """Read the ADC and return the value"""
+        return rp2040_u2if.adc_get_value(self.pin_id) << 4
+
+    # pylint: disable=no-self-use
+    @value.setter
+    def value(self, value):
+        # emulate what CircuitPython does
+        raise AttributeError("'AnalogIn' object has no attribute 'value'")
+
+    # pylint: enable=no-self-use
+
+    def deinit(self):
+        pass
+
+class AnalogIn_Pico(AnalogIn):
+    """AnalogIn Base Class for Pico u2if"""
+
+    def __init__(self, pin):
+        # per their pinout, why only two?
+        if pin.id not in (26, 27):
+            raise ValueError("Pin does not support ADC.")
+        super().__init__(pin)
+
+class AnalogIn_Feather(AnalogIn):
+    """AnalogIn Base Class for Feather u2if"""
+
+    def __init__(self, pin):
+        if pin.id not in (26, 27, 28):
+            raise ValueError("Pin does not support ADC.")
+        super().__init__(pin)