Update PWMOut.py

[hackapet/Adafruit_Blinka.git] / src / adafruit_blinka / microcontroller / rockchip / PWMOut.py

diff --git a/src/adafruit_blinka/microcontroller/rockchip/PWMOut.py b/src/adafruit_blinka/microcontroller/rockchip/PWMOut.py
index ae0f0aea702977b10d9a4a8726f961b320905e56..6de24f44802e051c15a6b02f31c75f8791ed48b8 100644 (file)
--- a/src/adafruit_blinka/microcontroller/rockchip/PWMOut.py
+++ b/src/adafruit_blinka/microcontroller/rockchip/PWMOut.py
@@ -1,3 +1,9 @@
+"""
+Much code from https://github.com/vsergeev/python-periphery/blob/master/periphery/pwm.py
+Copyright (c) 2015-2016 vsergeev / Ivan (Vanya) A. Sergeev
+License: MIT
+"""
+
 import os
 from time import sleep
 from errno import EACCES
@@ -7,6 +13,8 @@ try:
 except ImportError:
     raise RuntimeError("No PWM outputs defined for this board.") from ImportError
 
+# pylint: disable=unnecessary-pass
+
 
 class PWMError(IOError):
     """Base class for PWM errors."""
@@ -14,6 +22,9 @@ class PWMError(IOError):
     pass
 
 
+# pylint: enable=unnecessary-pass
+
+
 class PWMOut:
     """Pulse Width Modulation Output Class"""
 
@@ -83,6 +94,9 @@ class PWMOut:
             self._chip_path, self._channel_path.format(self._channel)
         )
 
+        if variable_frequency:
+            print("Variable Frequency is not supported, continuing without it...")
+
         if not os.path.isdir(self._chip_path):
             raise LookupError("Opening PWM: PWM chip {} not found.".format(self._chip))
 
@@ -163,11 +177,11 @@ class PWMOut:
     # Methods
 
     def enable(self):
-        """Enable the PWM outout."""
+        """Enable the PWM output."""
         self.enabled = True
 
     def disable(self):
-        """Diable the PWM output."""
+        """Disable the PWM output."""
         self.enabled = False
 
     # Mutable properties
@@ -183,11 +197,11 @@ class PWMOut:
 
     period = property(_get_period, _set_period)
     """Get or set the PWM's output period in seconds.
-    
+
     Raises:
         PWMError: if an I/O or OS error occurs.
         TypeError: if value type is not int.
-        
+
     :type: int, float
     """
 
@@ -201,11 +215,11 @@ class PWMOut:
 
     period_ms = property(_get_period_ms, _set_period_ms)
     """Get or set the PWM's output period in milliseconds.
-    
+
     Raises:
         PWMError: if an I/O or OS error occurs.
         TypeError: if value type is not int.
-        
+
     :type: int, float
     """
 
@@ -220,11 +234,11 @@ class PWMOut:
 
     period_us = property(_get_period_us, _set_period_us)
     """Get or set the PWM's output period in microseconds.
-    
+
     Raises:
         PWMError: if an I/O or OS error occurs.
         TypeError: if value type is not int.
-        
+
     :type: int
     """
 
@@ -252,11 +266,11 @@ class PWMOut:
 
     period_ns = property(_get_period_ns, _set_period_ns)
     """Get or set the PWM's output period in nanoseconds.
-    
+
     Raises:
         PWMError: if an I/O or OS error occurs.
         TypeError: if value type is not int.
-        
+
     :type: int
     """
 
@@ -280,11 +294,11 @@ class PWMOut:
 
     duty_cycle_ns = property(_get_duty_cycle_ns, _set_duty_cycle_ns)
     """Get or set the PWM's output duty cycle in nanoseconds.
-    
+
     Raises:
         PWMError: if an I/O or OS error occurs.
         TypeError: if value type is not int.
-        
+
     :type: int
     """