added typing for image, scs, and, reverse_bit num

Author: SebastienFauque

adafruit_sharpmemorydisplay.py

@@ -33,7 +33,9 @@
 from micropython import const
 
 try:
+    from PIL import Image
     import numpy
+    from digitalio import DigitalInOut
 except ImportError:
     numpy = None
 
@@ -45,7 +47,7 @@
 _SHARPMEM_BIT_CLEAR = const(0x20)  # in lsb
 
 
-def reverse_bit(num):
+def reverse_bit(num: float):
     """Turn an LSB byte to an MSB byte, and vice versa. Used for SPI as
     it is LSB for the SHARP, but 99% of SPI implementations are MSB only!"""
     result = 0
@@ -62,7 +64,15 @@ class SharpMemoryDisplay(adafruit_framebuf.FrameBuffer):
 
     # pylint: disable=too-many-instance-attributes,abstract-method
 
-    def __init__(self, spi, scs_pin, width, height, *, baudrate=2000000):
+    def __init__(
+        self,
+        spi: SPIDevice,
+        scs_pin: DigitalInOut,
+        width: float,
+        height: float,
+        *,
+        baudrate=2000000
+    ):
         scs_pin.switch_to_output(value=True)
         self.spi_device = SPIDevice(
             spi, scs_pin, cs_active_value=True, baudrate=baudrate
@@ -105,7 +115,7 @@ def show(self):
             image_buffer.extend(self._buf)
             spi.write(image_buffer)
 
-    def image(self, img):
+    def image(self, img: Image):
         """Set buffer to value of Python Imaging Library image.  The image should
         be in 1 bit mode and a size equal to the display size."""
         # determine our effective width/height, taking rotation into account