1 files changed, 65 insertions, 0 deletions
diff --git a/tests/circuitpython-manual/audiopwmio/single_buffer_loop.py b/tests/circuitpython-manual/audiopwmio/single_buffer_loop.py
new file mode 100644
index 000000000..dfac475b5
--- /dev/null
+++ b/tests/circuitpython-manual/audiopwmio/single_buffer_loop.py
@@ -0,0 +1,65 @@
+import audiocore
+import audiopwmio
+import board
+import digitalio
+import array
+import time
+import math
+
+trigger = digitalio.DigitalInOut(board.D4)
+trigger.switch_to_output(True)
+
+# Generate one period of sine wav.
+length = 8000 // 440
+
+samples = []
+sample_names = [
+"unsigned 8 bit",
+"signed 8 bit",
+"unsigned 16 bit",
+"signed 16 bit"
+]
+
+
+# unsigned 8 bit
+u8 = array.array("B", [0] * length)
+for i in range(length):
+    u8[i] = int(math.sin(math.pi * 2 * i / length) * (2 ** 7) + 2 ** 7)
+
+samples.append(audiocore.RawSample(u8, sample_rate=4000))
+
+# signed 8 bit
+s8 = array.array("b", [0] * length)
+for i in range(length):
+    s8[i] = int(math.sin(math.pi * 2 * i / length) * (2 ** 7))
+
+samples.append(audiocore.RawSample(s8, sample_rate=16000))
+
+# unsigned 16 bit
+u16 = array.array("H", [0] * length)
+for i in range(length):
+    u16[i] = int(math.sin(math.pi * 2 * i / length) * (2 ** 15) + 2 ** 15)
+
+samples.append(audiocore.RawSample(u16, sample_rate=8000))
+
+
+# signed 16 bit
+s16 = array.array("h", [0] * length)
+for i in range(length):
+    s16[i] = int(math.sin(math.pi * 2 * i / length) * (2 ** 15))
+
+samples.append(audiocore.RawSample(s16, sample_rate=8000))
+
+
+dac = audiopwmio.PWMAudioOut(board.D13)
+for sample, name in zip(samples, sample_names):
+    print(name)
+    trigger.value = False
+    dac.play(sample, loop=True)
+    time.sleep(1)
+    dac.stop()
+    time.sleep(0.1)
+    trigger.value = True
+    print()
+
+print("done")