nrf5/examples: Adding example to show how to use current PWM module to control servo motors.

nrf5/examples/servo.py

@@ -0,0 +1,50 @@
+# This file is part of the Micro Python project, http://micropython.org/
+#
+# The MIT License (MIT)
+#
+# Copyright (c) 2017 Glenn Ruben Bakke
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+# THE SOFTWARE
+
+import time
+from machine import PWM, Pin
+
+class Servo():
+    def __init__(self, pin_name=""):
+        if pin_name:
+            self.pin = Pin(pin_name, mode=Pin.OUT, pull=Pin.PULL_DOWN)
+        else:
+            self.pin = Pin("A22", mode=Pin.OUT, pull=Pin.PULL_DOWN)
+    def left(self):
+        p = PWM(0, self.pin, freq=PWM.FREQ_125KHZ, pulse_width=105, period=2500, mode=PWM.MODE_HIGH_LOW)
+        p.init()
+        time.sleep_ms(200)
+        p.deinit()
+        
+    def center(self):
+        p = PWM(0, self.pin, freq=PWM.FREQ_125KHZ, pulse_width=188, period=2500, mode=PWM.MODE_HIGH_LOW)
+        p.init()
+        time.sleep_ms(200)
+        p.deinit()
+        
+    def right(self):
+        p = PWM(0, self.pin, freq=PWM.FREQ_125KHZ, pulse_width=275, period=2500, mode=PWM.MODE_HIGH_LOW)
+        p.init()
+        time.sleep_ms(200)
+        p.deinit()