6 files changed, 110 insertions, 0 deletions
diff --git a/examples/hwapi/button_led.py b/examples/hwapi/button_led.py
new file mode 100644
index 0000000000..bd6fe01729
--- /dev/null
+++ b/examples/hwapi/button_led.py
@@ -0,0 +1,9 @@
+import utime
+from hwconfig import LED, BUTTON
+
+# Light LED when (and while) a BUTTON is pressed
+
+while 1:
+    LED.value(BUTTON.value())
+    # Don't burn CPU
+    utime.sleep_ms(10)
diff --git a/examples/hwapi/button_reaction.py b/examples/hwapi/button_reaction.py
new file mode 100644
index 0000000000..5e1890d5aa
--- /dev/null
+++ b/examples/hwapi/button_reaction.py
@@ -0,0 +1,19 @@
+import utime
+import machine
+from hwconfig import LED, BUTTON
+
+# machine.time_pulse_us() function demo
+
+print("""\
+Let's play an interesting game:
+You click button as fast as you can, and I tell you how slow you are.
+Ready? Cliiiiick!
+""")
+
+while 1:
+    try:
+        delay = machine.time_pulse_us(BUTTON, 1, 10*1000*1000)
+        print("You are as slow as %d microseconds!" % delay)
+    except OSError:
+        print("Well, you're *really* slow")
+    utime.sleep_ms(10)
diff --git a/examples/hwapi/hwconfig_console.py b/examples/hwapi/hwconfig_console.py
new file mode 100644
index 0000000000..4b0b0d79bd
--- /dev/null
+++ b/examples/hwapi/hwconfig_console.py
@@ -0,0 +1,13 @@
+# This is hwconfig for "emulation" for cases when there's no real hardware.
+# It just prints information to console.
+class LEDClass:
+
+    def __init__(self, id):
+        self.id = "LED(%d):" % id
+
+    def value(self, v):
+        print(self.id, v)
+
+
+LED = LEDClass(1)
+LED2 = LEDClass(12)
diff --git a/examples/hwapi/hwconfig_dragonboard410c.py b/examples/hwapi/hwconfig_dragonboard410c.py
index 00f21a658f..8061d7b743 100644
--- a/examples/hwapi/hwconfig_dragonboard410c.py
+++ b/examples/hwapi/hwconfig_dragonboard410c.py
@@ -1,12 +1,22 @@
 from machine import Pin
 
 # 96Boards/Qualcomm DragonBoard 410c
+#
 # By default, on-board LEDs are controlled by kernel LED driver.
 # To make corresponding pins be available as normal GPIO,
 # corresponding driver needs to be unbound first (as root):
 # echo -n "soc:leds" >/sys/class/leds/apq8016-sbc:green:user1/device/driver/unbind
 # Note that application also either should be run as root, or
 # /sys/class/gpio ownership needs to be changed.
+# Likewise, onboard buttons are controlled by gpio_keys driver.
+# To release corresponding GPIOs:
+# echo -n "gpio_keys" >/sys/class/input/input1/device/driver/unbind
 
 # User LED 1 on gpio21
 LED = Pin(21, Pin.OUT)
+
+# User LED 2 on gpio120
+LED2 = Pin(120, Pin.OUT)
+
+# Button S3 on gpio107
+BUTTON = Pin(107, Pin.IN)
diff --git a/examples/hwapi/soft_pwm2_uasyncio.py b/examples/hwapi/soft_pwm2_uasyncio.py
new file mode 100644
index 0000000000..abeb4b1bfc
--- /dev/null
+++ b/examples/hwapi/soft_pwm2_uasyncio.py
@@ -0,0 +1,31 @@
+# Like soft_pwm_uasyncio.py, but fading 2 LEDs with different phase.
+# Also see original soft_pwm.py.
+import uasyncio
+from hwconfig import LED, LED2
+
+
+async def pwm_cycle(led, duty, cycles):
+    duty_off = 20 - duty
+    for i in range(cycles):
+        if duty:
+            led.value(1)
+            await uasyncio.sleep_ms(duty)
+        if duty_off:
+            led.value(0)
+            await uasyncio.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 = uasyncio.get_event_loop()
+loop.create_task(fade_in_out(LED))
+loop.call_later_ms_(800, fade_in_out(LED2))
+loop.run_forever()
diff --git a/examples/hwapi/soft_pwm_uasyncio.py b/examples/hwapi/soft_pwm_uasyncio.py
new file mode 100644
index 0000000000..8d7ad8c9e0
--- /dev/null
+++ b/examples/hwapi/soft_pwm_uasyncio.py
@@ -0,0 +1,28 @@
+# See original soft_pwm.py for detailed comments.
+import uasyncio
+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 uasyncio.sleep_ms(duty)
+        if duty_off:
+            led.value(0)
+            await uasyncio.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 = uasyncio.get_event_loop()
+loop.run_until_complete(fade_in_out(LED))