added demos for square and sine, fixed square per comment

Author: brentru

adafruit_waveform/square.py

@@ -31,9 +31,9 @@
 import array
 
 
-def square_wave(sample_length = 2):
+def square_wave(sample_length=2):
     """Generate a single square wave of sample_length size"""
-    s = array.array("H", [0] * sample_length)
-    for i in range(sample_length / 2):
-        s[i] = 0xFFFF
-    return s
+    square = array.array("H", [0] * sample_length)
+    for i in range(sample_length // 2):
+        square[i] = 0xFFFF
+    return square

examples/sine_demo.py

@@ -0,0 +1,21 @@
+"""
+'sine_demo.py'.
+
+=================================================
+toggles the builtin LED using a sine wave
+"""
+import time
+import board
+import digitalio
+from adafruit_waveform import sine
+
+LED = digitalio.DigitalInOut(board.D13)
+LED.switch_to_output()
+
+SINE_SAMPLE = sine.sine_wave(150, 50)
+
+while True:
+    for i in range(len(SINE_SAMPLE)):
+        LED.value = i
+        print(LED.value)
+        time.sleep(0.50)

examples/square_demo.py

@@ -0,0 +1,20 @@
+"""
+'square_demo.py'.
+
+=================================================
+toggles the builtin LED using a square wave
+"""
+import time
+import digitalio
+import board
+from adafruit_waveform import square
+
+LED = digitalio.DigitalInOut(board.D13)
+LED.switch_to_output()
+SAMPLE_SQUARE = square.square_wave(2)
+
+while True:
+    for i in range(len(SAMPLE_SQUARE)):
+        LED.value = i
+        print(LED.value)
+        time.sleep(0.5)