tests for dig in, an in, an out, dig out all passing

[Adafruit_Blinka-hackapet.git] / src / adafruit_blinka / microcontroller / generic_agnostic_board / pin.py

diff --git a/src/adafruit_blinka/microcontroller/generic_agnostic_board/pin.py b/src/adafruit_blinka/microcontroller/generic_agnostic_board/pin.py
index b04e71de7196aa2d8abb8f19eb74856bd666e649..c52775926518aeed1e60e5ac1f3c4f135c55b7ce 100644 (file)
--- a/src/adafruit_blinka/microcontroller/generic_agnostic_board/pin.py
+++ b/src/adafruit_blinka/microcontroller/generic_agnostic_board/pin.py
@@ -178,8 +178,8 @@ class Pin:
         # Analog Out
         if self._mode == Pin.DAC:
             if val is None:
-                # write only
-                raise AttributeError("unreadable attribute")
+                self.previous_value = self.current_value
+                return self.current_value
             self.write(val)
             return None
         raise RuntimeError(
@@ -200,6 +200,7 @@ A0 = Pin(7)
 A1 = Pin(8)
 A2 = Pin(9)
 A3 = Pin(10)
+A4 = Pin(12)
 
 D7 = Pin(11)