add square wave generation

diff --git a/src/adafruit_blinka/microcontroller/generic_agnostic_board/pin.py b/src/adafruit_blinka/microcontroller/generic_agnostic_board/pin.py
index 9ad99052c3b5007867a3252de763e68330bf47a9..fbe74ec056f088af7599bf45fb2a2af0ea1589fa 100644 (file)
--- 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 analog output
 # (data points = 20, amplitude=100, frequency=1)
 sine_wave = [
     0,
@@ -29,6 +29,30 @@ sine_wave = [
     -31,
 ]
 
+# Values for a square wave analog output
+# (data points = 20, amplitude=100)
+square_wave_int = [
+    100,
+    -100,
+    100,
+    -100,
+    100,
+    -100,
+    100,
+    -100,
+    100,
+    -100,
+    100,
+    -100,
+    100,
+    -100,
+    100,
+    -100,
+    100,
+    -100,
+    100,
+    -100
+]
 
 class Pin:
     """A basic Pin class for use with generic_agnostic_board"""
@@ -72,11 +96,17 @@ 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_square_wave(self):
+        """Returns the next value in the square wave"""
+        if self._wave_idx is None:
+            self._wave_idx = 0
+        else:
+            self._wave_idx = (self._wave_idx + 1) % len(square_wave_int)
+        return square_wave_int[self._wave_idx]
+
     def __init__(self, pin_id=None):
         self.id = pin_id
         self._mode = None
@@ -92,13 +122,11 @@ 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
-            11: self.return_toggle,  # Dx_INPUT_TOGGLE
-            # Add other mappings as needed
+            10: self.return_square_wave,  # Ax_OUTPUT_WAVE_SAWTOOTH
+            11: self.return_toggle  # Dx_INPUT_TOGGLE
         }
 
     def init(self, mode=IN, pull=None):