1 files changed, 28 insertions, 0 deletions
diff --git a/examples/hwapi/soft_pwm_asyncio.py b/examples/hwapi/soft_pwm_asyncio.py
new file mode 100644
index 000000000..ae6c7340f
--- /dev/null
+++ b/examples/hwapi/soft_pwm_asyncio.py
@@ -0,0 +1,28 @@
+# See original soft_pwm.py for detailed comments.
+import asyncio
+from hwconfig import LED
+
+
+async def pwm_cycle(led, duty, cycles):
+    duty_off = 20 - duty
+    for i in range(cycles):
+        if duty:
+            led.value(1)
+            await asyncio.sleep_ms(duty)
+        if duty_off:
+            led.value(0)
+            await asyncio.sleep_ms(duty_off)
+
+
+async def fade_in_out(LED):
+    while True:
+        # Fade in
+        for i in range(1, 21):
+            await pwm_cycle(LED, i, 2)
+        # Fade out
+        for i in range(20, 0, -1):
+            await pwm_cycle(LED, i, 2)
+
+
+loop = asyncio.get_event_loop()
+loop.run_until_complete(fade_in_out(LED))