X-Git-Url: https://git.ayoreis.com/Adafruit_Blinka-hackapet.git/blobdiff_plain/4d339fcb18c46af2d579ca60971182f6f5f93768..e581ddf6e329e49b0c7c48c3c0ac967aa6a30571:/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 9ad9905..c527759 100644
--- a/src/adafruit_blinka/microcontroller/generic_agnostic_board/pin.py
+++ b/src/adafruit_blinka/microcontroller/generic_agnostic_board/pin.py
@@ -4,7 +4,7 @@
 """generic_agnostic_board pin interface"""
 import random
 
-# Values for sine wave output
+# Values for sine wave
 # (data points = 20, amplitude=100, frequency=1)
 sine_wave = [
     0,
@@ -29,6 +29,31 @@ sine_wave = [
     -31,
 ]
 
+# Values for a sawtooth wave
+# (data points = 20, amplitude=100)
+sawtooth_wave = [
+    -100,
+    -80,
+    -60,
+    -40,
+    -20,
+    0,
+    20,
+    40,
+    60,
+    80,
+    -100,
+    -80,
+    -60,
+    -40,
+    -20,
+    0,
+    20,
+    40,
+    60,
+    80,
+]
+
 
 class Pin:
     """A basic Pin class for use with generic_agnostic_board"""
@@ -72,11 +97,17 @@ class Pin:
         if self._wave_idx is None:
             self._wave_idx = 0
         else:
-            self._wave_idx += 1
-        if self._wave_idx >= len(sine_wave):
-            self._wave_idx = 0
+            self._wave_idx = (self._wave_idx + 1) % len(sine_wave)
         return sine_wave[self._wave_idx]
 
+    def return_sawtooth_wave(self):
+        """Returns the next value in the sawtooth wave"""
+        if self._wave_idx is None:
+            self._wave_idx = 0
+        else:
+            self._wave_idx = (self._wave_idx + 1) % len(sawtooth_wave)
+        return sawtooth_wave[self._wave_idx]
+
     def __init__(self, pin_id=None):
         self.id = pin_id
         self._mode = None
@@ -92,13 +123,11 @@ class Pin:
             2: self.return_true,  # Dx_INPUT_TRUE_PULL_UP
             3: self.return_true,  # Dx_INPUT_TRUE_PULL_DOWN
             4: self.return_true,  # Dx_OUTPUT
-            6: self.return_true,  # NEOPIXEL
             7: self.return_random_int,  # Ax_INPUT_RAND_INT
             8: self.return_fixed_int_pi,  # Ax_INPUT_FIXED_INT_PI
-            9: self.return_sine_wave,  # Ax_OUTPUT_WAVE_SINE
-            10: self.return_true,  # Ax_OUTPUT_WAVE_SAWTOOTH
+            9: self.return_sine_wave,  # Ax_INPUT_WAVE_SINE
+            10: self.return_sawtooth_wave,  # Ax_INPUT_WAVE_SAW
             11: self.return_toggle,  # Dx_INPUT_TOGGLE
-            # Add other mappings as needed
         }
 
     def init(self, mode=IN, pull=None):
@@ -149,8 +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(
@@ -171,6 +200,7 @@ A0 = Pin(7)
 A1 = Pin(8)
 A2 = Pin(9)
 A3 = Pin(10)
+A4 = Pin(12)
 
 D7 = Pin(11)