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ManualsBrandsAdafruit ManualsAdafruitFeather Friend eInk Display Driver Board

bmpHeight = read_le(f.read(4))

flip = True

print("Size: %d\nImage offset: %d\nHeader size: %d" %

(bmpFileSize, bmpImageoffset, headerSize))

print("Width: %d\nHeight: %d" % (bmpWidth, bmpHeight))

if read_le(f.read(2)) != 1:

raise BMPError("Not singleplane")

bmpDepth = read_le(f.read(2)) # bits per pixel

print("Bit depth: %d" % (bmpDepth))

if bmpDepth != 24:

raise BMPError("Not 24-bit")

if read_le(f.read(2)) != 0:

raise BMPError("Compressed file")

print("Image OK! Drawing...")

rowSize = (bmpWidth * 3 + 3) & ~3 # 32-bit line boundary

for row in range(bmpHeight): # For each scanline...

if flip: # Bitmap is stored bottom-to-top order (normal BMP)

pos = bmpImageoffset + (bmpHeight - 1 - row) * rowSize

else: # Bitmap is stored top-to-bottom

pos = bmpImageoffset + row * rowSize

# print ("seek to %d" % pos)

f.seek(pos)

rowdata = f.read(3*bmpWidth)

for col in range(bmpWidth):

b, g, r = rowdata[3*col:3*col+3] # BMP files store RGB in BGR

if r < 0x80 and g < 0x80 and b < 0x80:

epd.pixel(col, row, Adafruit_EPD.BLACK)

elif r >= 0x80 and g >= 0x80 and b >= 0x80:

pass #epd.pixel(row, col, Adafruit_EPD.WHITE)

elif r >= 0x80:

epd.pixel(col, row, Adafruit_EPD.RED)

except OSError:

print("Couldn't read file")

except BMPError as e:

print("Failed to parse BMP: " + e.args[0])

finally:

f.close()

print("Finished drawing")

# clear the buffer

display.fill(Adafruit_EPD.WHITE)

display_bitmap(display, FILENAME)

display.display()

Before running it, we need to change a few pin definitions though. Find the section of code that looks like this:

ecs = digitalio.DigitalInOut(board.D10)

dc = digitalio.DigitalInOut(board.D9)

srcs = digitalio.DigitalInOut(board.D7) # can be None to use internal memory

rst = digitalio.DigitalInOut(board.D11) # can be None to not use this pin

busy = digitalio.DigitalInOut(board.D12) # can be None to not use this pin