# *****************************************************************************
# * | File : epd2in13b_V4.py
# * | Author : Waveshare team
# * | Function : Electronic paper driver
# * | Info :
# *----------------
# * | This version: V1.0
# * | Date : 2022-04-21
# # | 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
from . import epdconfig
# Display resolution
EPD_WIDTH = 122
EPD_HEIGHT = 250
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(20)
epdconfig.digital_write(self.reset_pin, 0)
epdconfig.delay_ms(2)
epdconfig.digital_write(self.reset_pin, 1)
epdconfig.delay_ms(20)
# send 1 byte command
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)
# send 1 byte data
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)
# send a lot of data
def send_data2(self, data):
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)
# judge e-Paper whether is busy
def busy(self):
logger.debug("e-Paper busy")
while(epdconfig.digital_read(self.busy_pin) != 0):
epdconfig.delay_ms(10)
logger.debug("e-Paper busy release")
# set the display window
def set_windows(self, xstart, ystart, xend, yend):
self.send_command(0x44) # SET_RAM_X_ADDRESS_START_END_POSITION
self.send_data((xstart>>3) & 0xff)
self.send_data((xend>>3) & 0xff)
self.send_command(0x45) # SET_RAM_Y_ADDRESS_START_END_POSITION
self.send_data(ystart & 0xff)
self.send_data((ystart >> 8) & 0xff)
self.send_data(yend & 0xff)
self.send_data((yend >> 8) & 0xff)
# set the display cursor(origin)
def set_cursor(self, xstart, ystart):
self.send_command(0x4E) # SET_RAM_X_ADDRESS_COUNTER
self.send_data(xstart & 0xff)
self.send_command(0x4F) # SET_RAM_Y_ADDRESS_COUNTER
self.send_data(ystart & 0xff)
self.send_data((ystart >> 8) & 0xff)
# initialize
def init(self):
if (epdconfig.module_init() != 0):
return -1
self.reset()
self.busy()
self.send_command(0x12) # SWRESET
self.busy()
self.send_command(0x01) # Driver output control
self.send_data(0xf9)
self.send_data(0x00)
self.send_data(0x00)
self.send_command(0x11) # data entry mode
self.send_data(0x03)
self.set_windows(0, 0, self.width - 1, self.height - 1)
self.set_cursor(0, 0)
self.send_command(0x3C) # BorderWavefrom
self.send_data(0x05)
self.send_command(0x18) # Read built-in temperature sensor
self.send_data(0x80)
self.send_command(0x21) # Display update control
self.send_data(0x80)
self.send_data(0x80)
self.busy()
return 0
# turn on display
def ondisplay(self):
self.send_command(0x20)
self.busy()
# image converted to bytearray
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("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'))
return buf
# display image
def display(self, imageblack, imagered):
self.send_command(0x24)
self.send_data2(imageblack)
self.send_command(0x26)
self.send_data2(imagered)
self.ondisplay()
# display white image
def clear(self):
if self.width%8 == 0:
linewidth = int(self.width/8)
else:
linewidth = int(self.width/8) + 1
buf = [0xff] * (int(linewidth * self.height))
self.send_command(0x24)
self.send_data2(buf)
self.send_command(0x26)
self.send_data2(buf)
self.ondisplay()
# Compatible with older version functions
def Clear(self):
self.clear()
# sleep
def sleep(self):
self.send_command(0x10) # DEEP_SLEEP
self.send_data(0x01) # check code
epdconfig.delay_ms(2000)
epdconfig.module_exit()
### END OF FILE ###