X-Git-Url: https://git.ayoreis.com/Adafruit_Blinka-hackapet.git/blobdiff_plain/c228c4a5d51eaefa453a51706943a617d4664600..a79e37b2729f77faf00545062fc4a8ded1a6eb97:/src/adafruit_blinka/microcontroller/nova/pin.py

diff --git a/src/adafruit_blinka/microcontroller/nova/pin.py b/src/adafruit_blinka/microcontroller/nova/pin.py
index 6b5a616..590ebc6 100644
--- a/src/adafruit_blinka/microcontroller/nova/pin.py
+++ b/src/adafruit_blinka/microcontroller/nova/pin.py
@@ -1,11 +1,14 @@
+"""Binho Nova pin names"""
+
+
 class Pin:
     """A basic Pin class for use with Binho Nova."""
 
-    IN = 'DIN'
-    OUT = 'DOUT'
-    AIN = 'AIN'
-    AOUT = 'AOUT'
-    PWM = 'PWM'
+    IN = "DIN"
+    OUT = "DOUT"
+    AIN = "AIN"
+    AOUT = "AOUT"
+    PWM = "PWM"
     LOW = 0
     HIGH = 1
 
@@ -13,7 +16,11 @@ class Pin:
 
     def __init__(self, pin_id=None):
         if not Pin._nova:
+            # pylint: disable=import-outside-toplevel
             from adafruit_blinka.microcontroller.nova import Connection
+
+            # pylint: enable=import-outside-toplevel
+
             Pin._nova = Connection.getInstance()
         # check if pin is valid
         if pin_id > 4:
@@ -22,24 +29,27 @@ class Pin:
         self.id = pin_id
 
     def init(self, mode=IN, pull=None):
+        """Initialize the Pin"""
         if self.id is None:
             raise RuntimeError("Can not init a None type pin.")
-        # Nova does't have configurable internal pulls for 
+        # Nova does't have configurable internal pulls for
         if pull:
             raise ValueError("Internal pull up/down not currently supported.")
         Pin._nova.setIOpinMode(self.id, mode)
 
     def value(self, val=None):
+        """Set or return the Pin Value"""
         if self.id is None:
             raise RuntimeError("Can not access a None type pin.")
         # read
         if val is None:
-            return int(Pin._nova.getIOpinValue(self.id).split('VALUE ')[1])
+            return int(Pin._nova.getIOpinValue(self.id).split("VALUE ")[1])
         # write
         if val in (self.LOW, self.HIGH):
             Pin._nova.setIOpinValue(self.id, val)
-        else:
-            raise RuntimeError("Invalid value for pin")
+            return None
+        raise RuntimeError("Invalid value for pin")
+
 
 # create pin instances for each pin
 IO0 = Pin(0)
@@ -48,7 +58,6 @@ IO2 = Pin(2)
 IO3 = Pin(3)
 IO4 = Pin(4)
 
-# create None type pins for I2C and SPI since they are expected to be defined
 SCL = IO2
 SDA = IO0
 SCK = SCLK = IO3
@@ -70,4 +79,4 @@ UART1_TX = IO4
 UART1_RX = IO3
 
 # ordered as uartId, txId, rxId
-uartPorts = ((0, UART1_TX, UART1_RX), )
+uartPorts = ((0, UART1_TX, UART1_RX),)