204 lines
6.5 KiB
Python
204 lines
6.5 KiB
Python
|
# *****************************************************************************
|
||
|
|
# * | 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 ###
|
||
|
|
|