Moved imports to speed up on M0

Author: kattni

adafruit_character_lcd/character_lcd.py

@@ -49,8 +49,6 @@
 import time
 import digitalio
 from micropython import const
-import adafruit_mcp230xx
-import adafruit_74hc595
 
 __version__ = "0.0.0-auto.0"
 __repo__ = "https://github.com/adafruit/Adafruit_CircuitPython_CharLCD.git"
@@ -556,6 +554,7 @@ 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)
@@ -583,6 +582,7 @@ def __init__(self, spi, latch, columns, lines, backlight_inverted=False):
         inverted.
         """
         # pylint: enable=too-many-arguments
+        import adafruit_74hc595
         self._shift_register = adafruit_74hc595.ShiftRegister74HC595(spi, latch)
         reset = self._shift_register.get_pin(1)
         enable = self._shift_register.get_pin(2)

adafruit_character_lcd/character_lcd_rgb.py

@@ -48,7 +48,6 @@
 import time
 import digitalio
 from micropython import const
-import adafruit_mcp230xx
 
 # pylint: disable-msg=bad-whitespace
 # Commands
@@ -572,6 +571,7 @@ 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)