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epd7in5b_V2.py
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# *****************************************************************************
# * | File : epd7in5b_V2.py
# * | Author : Waveshare team
# * | Function : Electronic paper driver
# * | Info :
# *----------------
# * | This version: V4.2
# * | Date : 2022-01-08
# # | Info : python demo
# -----------------------------------------------------------------------------
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documnetation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS OR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
#
import logging
import epdconfig
# Display resolution
EPD_WIDTH = 800
EPD_HEIGHT = 480
logger = logging.getLogger(__name__)
class EPD:
def __init__(self):
self.reset_pin = epdconfig.RST_PIN
self.dc_pin = epdconfig.DC_PIN
self.busy_pin = epdconfig.BUSY_PIN
self.cs_pin = epdconfig.CS_PIN
self.width = EPD_WIDTH
self.height = EPD_HEIGHT
# Hardware reset
def reset(self):
epdconfig.digital_write(self.reset_pin, 1)
epdconfig.delay_ms(200)
epdconfig.digital_write(self.reset_pin, 0)
epdconfig.delay_ms(4)
epdconfig.digital_write(self.reset_pin, 1)
epdconfig.delay_ms(200)
def send_command(self, command):
epdconfig.digital_write(self.dc_pin, 0)
epdconfig.digital_write(self.cs_pin, 0)
epdconfig.spi_writebyte([command])
epdconfig.digital_write(self.cs_pin, 1)
def send_data(self, data):
epdconfig.digital_write(self.dc_pin, 1)
epdconfig.digital_write(self.cs_pin, 0)
epdconfig.spi_writebyte([data])
epdconfig.digital_write(self.cs_pin, 1)
def send_data2(self, data): # faster
epdconfig.digital_write(self.dc_pin, 1)
epdconfig.digital_write(self.cs_pin, 0)
epdconfig.spi_writebyte2(data)
epdconfig.digital_write(self.cs_pin, 1)
def ReadBusy(self):
logger.debug("e-Paper busy")
self.send_command(0x71)
busy = epdconfig.digital_read(self.busy_pin)
while (busy == 0):
self.send_command(0x71)
busy = epdconfig.digital_read(self.busy_pin)
epdconfig.delay_ms(200)
logger.debug("e-Paper busy release")
def init(self):
if epdconfig.module_init() != 0:
return -1
self.reset()
# self.send_command(0x06) # btst
# self.send_data(0x17)
# self.send_data(0x17)
# self.send_data(0x38) # If an exception is displayed, try using 0x38
# self.send_data(0x17)
self.send_command(0x01) # POWER SETTING
self.send_data(0x07)
self.send_data(0x07) # VGH=20V,VGL=-20V
self.send_data(0x3f) # VDH=15V
self.send_data(0x3f) # VDL=-15V
self.send_command(0x04) # POWER ON
epdconfig.delay_ms(100)
self.ReadBusy()
self.send_command(0X00) # PANNEL SETTING
self.send_data(0x0F) # KW-3f KWR-2F BWROTP-0f BWOTP-1f
self.send_command(0x61) # tres
self.send_data(0x03) # source 800
self.send_data(0x20)
self.send_data(0x01) # gate 480
self.send_data(0xE0)
self.send_command(0X15)
self.send_data(0x00)
self.send_command(0X50) # VCOM AND DATA INTERVAL SETTING
self.send_data(0x11)
self.send_data(0x07)
self.send_command(0X60) # TCON SETTING
self.send_data(0x22)
self.send_command(0x65)
self.send_data(0x00)
self.send_data(0x00)
self.send_data(0x00)
self.send_data(0x00)
return 0
def getbuffer(self, image):
img = image
imwidth, imheight = img.size
if imwidth == self.width and imheight == self.height:
img = img.convert('1')
elif imwidth == self.height and imheight == self.width:
# image has correct dimensions, but needs to be rotated
img = img.rotate(90, expand=True).convert('1')
else:
logger.warning(
f"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, imageblack, imagered):
self.send_command(0x10)
# The black bytes need to be inverted back from what getbuffer did
for i in range(len(imageblack)):
imageblack[i] ^= 0xFF
self.send_data2(imageblack)
self.send_command(0x13)
self.send_data2(imagered)
self.send_command(0x12)
epdconfig.delay_ms(100)
self.ReadBusy()
def Clear(self):
buf = [0x00] * (int(self.width / 8) * self.height)
buf2 = [0xff] * (int(self.width / 8) * self.height)
self.send_command(0x10)
self.send_data2(buf2)
self.send_command(0x13)
self.send_data2(buf)
self.send_command(0x12)
epdconfig.delay_ms(100)
self.ReadBusy()
def sleep(self):
self.send_command(0x02) # POWER_OFF
self.ReadBusy()
self.send_command(0x07) # DEEP_SLEEP
self.send_data(0XA5)
epdconfig.delay_ms(2000)
epdconfig.module_exit()
### END OF FILE ###