131 lines
4.4 KiB
Python
131 lines
4.4 KiB
Python
import digitalio
|
|
import busio
|
|
import board
|
|
from adafruit_epd.epd import Adafruit_EPD
|
|
from adafruit_epd.il0373 import Adafruit_IL0373
|
|
from adafruit_epd.il91874 import Adafruit_IL91874 # pylint: disable=unused-import
|
|
from adafruit_epd.il0398 import Adafruit_IL0398 # pylint: disable=unused-import
|
|
from adafruit_epd.ssd1608 import Adafruit_SSD1608 # pylint: disable=unused-import
|
|
from adafruit_epd.ssd1675 import Adafruit_SSD1675 # pylint: disable=unused-import
|
|
|
|
|
|
# create the spi device and pins we will need
|
|
spi = busio.SPI(board.SCK, MOSI=board.MOSI, MISO=board.MISO)
|
|
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
|
|
|
|
# give them all to our driver
|
|
print("Creating display")
|
|
# display = Adafruit_SSD1608(200, 200, spi, # 1.54" HD mono display
|
|
# display = Adafruit_SSD1675(122, 250, spi, # 2.13" HD mono display
|
|
# display = Adafruit_IL91874(176, 264, spi, # 2.7" Tri-color display
|
|
# display = Adafruit_IL0373(152, 152, spi, # 1.54" Tri-color display
|
|
# display = Adafruit_IL0373(128, 296, spi, # 2.9" Tri-color display
|
|
# display = Adafruit_IL0398(400, 300, spi, # 4.2" Tri-color display
|
|
display = Adafruit_IL0373(
|
|
104,
|
|
212,
|
|
spi, # 2.13" Tri-color display
|
|
cs_pin=ecs,
|
|
dc_pin=dc,
|
|
sramcs_pin=srcs,
|
|
rst_pin=rst,
|
|
busy_pin=busy,
|
|
)
|
|
|
|
# IF YOU HAVE A FLEXIBLE DISPLAY (2.13" or 2.9") uncomment these lines!
|
|
# display.set_black_buffer(1, False)
|
|
# display.set_color_buffer(1, False)
|
|
|
|
display.rotation = 0
|
|
|
|
FILENAME = "blinka154mono.bmp"
|
|
|
|
|
|
def read_le(s):
|
|
# as of this writting, int.from_bytes does not have LE support, DIY!
|
|
result = 0
|
|
shift = 0
|
|
for byte in bytearray(s):
|
|
result += byte << shift
|
|
shift += 8
|
|
return result
|
|
|
|
|
|
class BMPError(Exception):
|
|
pass
|
|
|
|
|
|
def display_bitmap(epd, filename): # pylint: disable=too-many-locals, too-many-branches
|
|
try:
|
|
f = open("/" + filename, "rb")
|
|
except OSError:
|
|
print("Couldn't open file")
|
|
return
|
|
|
|
print("File opened")
|
|
try:
|
|
if f.read(2) != b"BM": # check signature
|
|
raise BMPError("Not BitMap file")
|
|
|
|
bmpFileSize = read_le(f.read(4))
|
|
f.read(4) # Read & ignore creator bytes
|
|
|
|
bmpImageoffset = read_le(f.read(4)) # Start of image data
|
|
headerSize = read_le(f.read(4))
|
|
bmpWidth = read_le(f.read(4))
|
|
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()
|