DM: adding blinka support

Author: deanm1278

adafruit_epd/il0373.py

@@ -166,6 +166,37 @@ def display(self):
 
         self.update()
 
+    def image(self, image):
+        """Set buffer to value of Python Imaging Library image.  The image should
+        be in RGB mode and a size equal to the display size.
+        """
+        if image.mode != 'RGB':
+            raise ValueError('Image must be in mode RGB.')
+        imwidth, imheight = image.size
+        if imwidth != self.width or imheight != self.height:
+            raise ValueError('Image must be same dimensions as display ({0}x{1}).' \
+                .format(self.width, self.height))
+        # Grab all the pixels from the image, faster than getpixel.
+        pix = image.load()
+
+        for y in xrange(image.size[1]):
+            for x in xrange(image.size[0]):
+                if x == 0:
+                    x = 1
+                p = pix[x, y]
+
+                addr = int(((self.width - x) * self.height + y)/8)
+                if color == Adafruit_EPD.RED:
+                    addr = addr + self.bw_bufsize
+                current = self.sram.read8(addr)
+
+                if p in ((0xFF, 0, 0), (0, 0, 0)):
+                    current = current & ~(1 << (7 - y%8))
+                else:
+                    current = current | (1 << (7 - y%8))
+
+                self.sram.write8(addr, current)
+
     def draw_pixel(self, x, y, color):
         """draw a single pixel in the display buffer"""
         if (x < 0) or (x >= self.width) or (y < 0) or (y >= self.height):

examples/epd_blinka.py

@@ -0,0 +1,77 @@
+from PIL import Image
+from PIL import ImageDraw
+from PIL import ImageFont
+
+import digitalio
+import busio
+import board
+from adafruit_epd.epd import Adafruit_EPD
+from adafruit_epd.il0373 import Adafruit_IL0373
+
+# create the spi device and pins we will need
+spi = busio.SPI(board.SCK, MOSI=board.MOSI, MISO=board.MISO)
+ecs = digitalio.DigitalInOut(board.D22)
+dc = digitalio.DigitalInOut(board.D13)
+srcs = digitalio.DigitalInOut(board.D8)
+rst = digitalio.DigitalInOut(board.D19)
+busy = digitalio.DigitalInOut(board.D26)
+
+# give them all to our driver
+display = Adafruit_IL0373(152, 152, rst, dc, busy, srcs, ecs, spi)
+# Create blank image for drawing.
+# Make sure to create image with mode '1' for 1-bit color.
+width = disp.width
+height = disp.height
+image = Image.new('RGB', (width, height))
+
+WHITE = (0xFF, 0xFF, 0xFF)
+RED = (0xFF, 0x00, 0x00)
+BLACK = (0x00, 0x00, 0x00)
+GRAY = (0x7F, 0x7F, 0x7F)
+
+# clear the buffer
+display.clear_buffer()
+
+# Get drawing object to draw on image.
+draw = ImageDraw.Draw(image)
+
+# Draw a white filled box to clear the image.
+draw.rectangle((0,0,width,height), outline=BLACK, fill=WHITE)
+
+# Draw some shapes.
+# First define some constants to allow easy resizing of shapes.
+padding = 2
+shape_width = 30
+top = padding
+bottom = height-padding
+# Move left to right keeping track of the current x position for drawing shapes.
+x = padding
+# Draw an ellipse.
+draw.ellipse((x, top , x+shape_width, bottom), outline=RED, fill=GRAY)
+x += shape_width+padding
+# Draw a rectangle.
+draw.rectangle((x, top, x+shape_width, bottom), outline=RED, fill=BLACK)
+x += shape_width+padding
+# Draw a triangle.
+draw.polygon([(x, bottom), (x+shape_width/2, top), (x+shape_width, bottom)], outline=BLACK, fill=RED)
+x += shape_width+padding
+# Draw an X.
+draw.line((x, bottom, x+shape_width, top), fill=RED)
+draw.line((x, top, x+shape_width, bottom), fill=RED)
+x += shape_width+padding
+
+# Load default font.
+font = ImageFont.load_default()
+
+# Alternatively load a TTF font.  Make sure the .ttf font file is in the same directory as the python script!
+# Some other nice fonts to try: http://www.dafont.com/bitmap.php
+#font = ImageFont.truetype('Minecraftia.ttf', 8)
+
+# Write two lines of text.
+draw.text((x, top),    'Hello',  font=font, fill=RED)
+draw.text((x, top+20), 'World!', font=font, fill=RED)
+
+# Display image.
+display.image(image)
+
+display.display()