Merge pull request #39 from caternuson/iss36

Updates for new MCP230xx

Author: brentru

README.rst

@@ -49,6 +49,9 @@ Dependencies
 This driver depends on:
 
 * `Adafruit CircuitPython <https://github.com/adafruit/circuitpython>`_
+* `Adafruit CircuitPython BusDevice <https://github.com/adafruit/Adafruit_CircuitPython_BusDevice>`_
+* `Adafruit CircuitPython MCP230xx <https://github.com/adafruit/Adafruit_CircuitPython_MCP230xx>`_
+* `Adafruit CircuitPython 74HC595 <https://github.com/adafruit/Adafruit_CircuitPython_74HC595>`_
 
 I2C & SPI displays also depend on:
 

adafruit_character_lcd/character_lcd_i2c.py

@@ -71,14 +71,14 @@ def __init__(self, i2c, columns, lines, backlight_inverted=False):
         on the specified I2C bus with the specified number of columns and
         lines on the display. Optionally specify if backlight is inverted.
         """
-        import adafruit_mcp230xx
-        self._mcp = adafruit_mcp230xx.MCP23008(i2c)
-        reset = self._mcp.get_pin(1)
-        enable = self._mcp.get_pin(2)
-        db4 = self._mcp.get_pin(3)
-        db5 = self._mcp.get_pin(4)
-        db6 = self._mcp.get_pin(5)
-        db7 = self._mcp.get_pin(6)
-        backlight_pin = self._mcp.get_pin(7)
-        super().__init__(reset, enable, db4, db5, db6, db7, columns, lines,
-                         backlight_pin=backlight_pin, backlight_inverted=backlight_inverted)
+        from adafruit_mcp230xx.mcp23008 import MCP23008
+        mcp = MCP23008(i2c)
+        super().__init__(mcp.get_pin(1),
+                         mcp.get_pin(2),
+                         mcp.get_pin(3),
+                         mcp.get_pin(4),
+                         mcp.get_pin(5),
+                         mcp.get_pin(6),
+                         columns, lines,
+                         backlight_pin=mcp.get_pin(7),
+                         backlight_inverted=backlight_inverted)

adafruit_character_lcd/character_lcd_rgb_i2c.py

@@ -83,32 +83,34 @@ def __init__(self, i2c, columns, lines):
         on the specified I2C bus with the specified number of columns and lines
         on the display.
         """
-        import adafruit_mcp230xx
-        self._mcp = adafruit_mcp230xx.MCP23017(i2c)
-        reset = self._mcp.get_pin(15)
-        read_write = self._mcp.get_pin(14)
-        enable = self._mcp.get_pin(13)
-        db4 = self._mcp.get_pin(12)
-        db5 = self._mcp.get_pin(11)
-        db6 = self._mcp.get_pin(10)
-        db7 = self._mcp.get_pin(9)
-        red = self._mcp.get_pin(6)
-        green = self._mcp.get_pin(7)
-        blue = self._mcp.get_pin(8)
-        self._left_button = self._mcp.get_pin(4)
-        self._up_button = self._mcp.get_pin(3)
-        self._down_button = self._mcp.get_pin(2)
-        self._right_button = self._mcp.get_pin(1)
-        self._select_button = self._mcp.get_pin(0)
+        from adafruit_mcp230xx.mcp23017 import MCP23017
+        mcp = MCP23017(i2c)
+
+        self._left_button = mcp.get_pin(4)
+        self._up_button = mcp.get_pin(3)
+        self._down_button = mcp.get_pin(2)
+        self._right_button = mcp.get_pin(1)
+        self._select_button = mcp.get_pin(0)
 
         self._buttons = [self._left_button, self._up_button, self._down_button, self._right_button,
                          self._select_button]
 
         for pin in self._buttons:
             pin.switch_to_input(pull=digitalio.Pull.UP)
 
-        super().__init__(reset, enable, db4, db5, db6, db7, columns, lines, red, green, blue,
-                         read_write)
+        super().__init__(mcp.get_pin(15),
+                         mcp.get_pin(13),
+                         mcp.get_pin(12),
+                         mcp.get_pin(11),
+                         mcp.get_pin(10),
+                         mcp.get_pin(9),
+                         columns,
+                         lines,
+                         mcp.get_pin(6),
+                         mcp.get_pin(7),
+                         mcp.get_pin(8),
+                         mcp.get_pin(14))
+
 
     @property
     def left_button(self):