nemunaire/waveshareteam-e-Paper
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Greatly increase speed of drawing image.

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Dmitry Brant 2020-10-11 18:49:25 -04:00
commit 8d49a9e3a3
1 changed files with 31 additions and 31 deletions
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62
RaspberryPi&JetsonNano/python/lib/waveshare_epd/epd7in5_V2.py
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@ -7,6 +7,10 @@
# * | This version: V4.0
# * | Date : 2019-06-20
# # | Info : python demo
#
# Modifications by Dmitry Brant:
# - Oct 2020: New routines for faster SPI data transfer.
#
# -----------------------------------------------------------------------------
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documnetation files (the "Software"), to deal
@ -64,7 +68,13 @@ class EPD:
epdconfig.digital_write(self.cs_pin, 0)
epdconfig.spi_writebyte([data])
epdconfig.digital_write(self.cs_pin, 1)
def send_data2(self, data):
epdconfig.digital_write(self.dc_pin, 1)
epdconfig.digital_write(self.cs_pin, 0)
epdconfig.SPI.writebytes2(data)
epdconfig.digital_write(self.cs_pin, 1)
def ReadBusy(self):
logging.debug("e-Paper busy")
self.send_command(0x71)
@ -113,47 +123,37 @@ class EPD:
return 0
def getbuffer(self, image):
# logging.debug("bufsiz = ",int(self.width/8) * self.height)
buf = [0xFF] * (int(self.width/8) * self.height)
image_monocolor = image.convert('1')
imwidth, imheight = image_monocolor.size
pixels = image_monocolor.load()
# logging.debug("imwidth = %d, imheight = %d",imwidth,imheight)
img = image
imwidth, imheight = img.size
if(imwidth == self.width and imheight == self.height):
logging.debug("Vertical")
for y in range(imheight):
for x in range(imwidth):
# Set the bits for the column of pixels at the current position.
if pixels[x, y] == 0:
buf[int((x + y * self.width) / 8)] &= ~(0x80 >> (x % 8))
img = img.convert('1')
elif(imwidth == self.height and imheight == self.width):
logging.debug("Horizontal")
for y in range(imheight):
for x in range(imwidth):
newx = y
newy = self.height - x - 1
if pixels[x, y] == 0:
buf[int((newx + newy*self.width) / 8)] &= ~(0x80 >> (y % 8))
img = img.rotate(90, expand=True).convert('1')
else:
logging.warning("Wrong image dimensions: must be " + str(self.width) + "x" + str(self.height))
# return a blank buffer
return [0x00] * (int(self.width/8) * self.height)
buf = bytearray(img.tobytes('raw'))
# The bytes need to be inverted, because in the PIL world 0=black and 1=white, but
# in the e-paper world 0=white and 1=black.
for i in range(len(buf)):
buf[i] ^= 0xFF
return buf
def display(self, image):
self.send_command(0x13)
for i in range(0, int(self.width * self.height / 8)):
self.send_data(~image[i]);
self.send_data2(image)
self.send_command(0x12)
epdconfig.delay_ms(100)
self.ReadBusy()
def Clear(self):
buf = [0x00] * (int(self.width/8) * self.height)
self.send_command(0x10)
for i in range(0, int(self.width * self.height / 8)):
self.send_data(0x00)
self.send_data2(buf)
self.send_command(0x13)
for i in range(0, int(self.width * self.height / 8)):
self.send_data(0x00)
self.send_data2(buf)
self.send_command(0x12)
epdconfig.delay_ms(100)
self.ReadBusy()