60 lines
No EOL
2.6 KiB
Python
60 lines
No EOL
2.6 KiB
Python
from EpdAdapter import EpdAdapter, DISPLAY_REFRESH, DATA_START_TRANSMISSION_1
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class Epd7in5bAdapter (EpdAdapter):
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def __init__ ():
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super(Epd7in5bAdapter, self).__init__(640, 384)
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def display_frame (self, frame_buffer):
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self.send_command(DATA_START_TRANSMISSION_1)
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for i in range(0, int(self.width / 4 * self.height)):
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#the above line had to be modified due to python2 -> python3
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#the issue lies in division, which returns integers in python2
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#but floats in python3
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temp1 = frame_buffer[i]
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j = 0
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while (j < 4):
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if ((temp1 & 0xC0) == 0xC0):
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temp2 = 0x03
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elif ((temp1 & 0xC0) == 0x00):
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temp2 = 0x00
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else:
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temp2 = 0x04
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temp2 = (temp2 << 4) & 0xFF
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temp1 = (temp1 << 2) & 0xFF
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j += 1
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if((temp1 & 0xC0) == 0xC0):
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temp2 |= 0x03
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elif ((temp1 & 0xC0) == 0x00):
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temp2 |= 0x00
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else:
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temp2 |= 0x04
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temp1 = (temp1 << 2) & 0xFF
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self.send_data(temp2)
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j += 1
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self.send_command(DISPLAY_REFRESH)
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self.delay_ms(100)
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self.wait_until_idle()
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def get_frame_buffer (self, image):
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buf = [0x00] * int(self.width * self.height / 4)
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# Set buffer to value of Python Imaging Library image.
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# Image must be in mode L.
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image_grayscale = image.convert('L', dither=None)
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imwidth, imheight = image_grayscale.size
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if imwidth != self.width or imheight != self.height:
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raise ValueError('Image must be same dimensions as display \
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({0}x{1}).' .format(self.width, self.height))
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pixels = image_grayscale.load()
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for y in range(self.height):
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for x in range(self.width):
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# Set the bits for the column of pixels at the current position.
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if pixels[x, y] < 75: #was 64 # black
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buf[int((x + y * self.width) / 4)] &= ~(0xC0 >> (x % 4 * 2))
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elif pixels[x, y] < 110: #was 192 # convert gray to red
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buf[int((x + y * self.width) / 4)] &= ~(0xC0 >> (x % 4 * 2))
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buf[int((x + y * self.width) / 4)] |= 0x40 >> (x % 4 * 2)
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else: # white
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buf[int((x + y * self.width) / 4)] |= 0xC0 >> (x % 4 * 2)
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return buf #due to python2 -> python3, int had to be added in 'get_frame
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#_buffer |