196 lines
6.6 KiB
Python
196 lines
6.6 KiB
Python
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# *****************************************************************************
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# * | File : epd1in54b.py
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# * | Author : Waveshare team
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# * | Function : Electronic paper driver
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# * | Info :
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# *----------------
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# * | This version: V4.1
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# * | Date : 2022-08-10
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# # | Info : python demo
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# -----------------------------------------------------------------------------
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documnetation files (the "Software"), to deal
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# in the Software without restriction, including without limitation the rights
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# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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# copies of the Software, and to permit persons to whom the Software is
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# furished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in
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# all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS OR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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# THE SOFTWARE.
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#
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import logging
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from . import epdconfig
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# Display resolution
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EPD_WIDTH = 200
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EPD_HEIGHT = 200
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logger = logging.getLogger(__name__)
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class EPD:
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def __init__(self):
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self.reset_pin = epdconfig.RST_PIN
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self.dc_pin = epdconfig.DC_PIN
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self.busy_pin = epdconfig.BUSY_PIN
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self.cs_pin = epdconfig.CS_PIN
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self.width = EPD_WIDTH
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self.height = EPD_HEIGHT
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# Hardware reset
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def reset(self):
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epdconfig.digital_write(self.reset_pin, 1)
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epdconfig.delay_ms(200)
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epdconfig.digital_write(self.reset_pin, 0) # module reset
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epdconfig.delay_ms(5)
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epdconfig.digital_write(self.reset_pin, 1)
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epdconfig.delay_ms(200)
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def send_command(self, command):
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epdconfig.digital_write(self.dc_pin, 0)
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epdconfig.digital_write(self.cs_pin, 0)
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epdconfig.spi_writebyte([command])
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epdconfig.digital_write(self.cs_pin, 1)
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def send_data(self, data):
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epdconfig.digital_write(self.dc_pin, 1)
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epdconfig.digital_write(self.cs_pin, 0)
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epdconfig.spi_writebyte([data])
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epdconfig.digital_write(self.cs_pin, 1)
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# send a lot of data
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def send_data2(self, data):
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epdconfig.digital_write(self.dc_pin, 1)
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epdconfig.digital_write(self.cs_pin, 0)
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epdconfig.spi_writebyte2(data)
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epdconfig.digital_write(self.cs_pin, 1)
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def ReadBusy(self):
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logger.debug("e-Paper busy")
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while(epdconfig.digital_read(self.busy_pin) == 1):
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epdconfig.delay_ms(100)
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logger.debug("e-Paper busy release")
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def init(self):
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if (epdconfig.module_init() != 0):
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return -1
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# EPD hardware init start
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self.reset()
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self.ReadBusy()
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self.send_command(0x12) #SWRESET
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self.ReadBusy()
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self.send_command(0x01) #Driver output control
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self.send_data(0xC7)
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self.send_data(0x00)
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self.send_data(0x01)
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self.send_command(0x11) #data entry mode
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self.send_data(0x01)
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self.send_command(0x44) #set Ram-X address start/end position
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self.send_data(0x00)
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self.send_data(0x18) #0x18-->(24+1)*8=200
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self.send_command(0x45) #set Ram-Y address start/end position
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self.send_data(0xC7) #0xC7-->(199+1)=200
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self.send_data(0x00)
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self.send_data(0x00)
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self.send_data(0x00)
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self.send_command(0x3C) #BorderWavefrom
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self.send_data(0x05)
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self.send_command(0x18) #Read built-in temperature sensor
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self.send_data(0x80)
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self.send_command(0x4E) # set RAM x address count to 0
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self.send_data(0x00)
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self.send_command(0x4F) # set RAM y address count to 0X199
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self.send_data(0xC7)
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self.send_data(0x00)
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self.ReadBusy()
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return 0
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def getbuffer(self, image):
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buf = [0xFF] * int(self.width * self.height / 8)
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# Set buffer to value of Python Imaging Library image.
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# Image must be in mode 1.
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image_monocolor = image.convert('1')
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imwidth, imheight = image_monocolor.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_monocolor.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] == 0:
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buf[int((x + y * self.width) / 8)] &= ~(0x80 >> (x % 8))
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return buf
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def display(self, blackimage, redimage):
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if self.width%8 == 0:
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linewidth = int(self.width/8)
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else:
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linewidth = int(self.width/8) + 1
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buf = [0x00] * self.height * linewidth
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# send black data
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if (blackimage != None):
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self.send_command(0x24) # DATA_START_TRANSMISSION_1
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self.send_data2(blackimage)
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# send red data
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if (redimage != None):
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self.send_command(0x26) # DATA_START_TRANSMISSION_2
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for i in range(0, int(self.width * self.height / 8)):
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buf[i] = ~redimage[i]
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self.send_data2(buf)
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self.send_command(0x22) # DISPLAY_REFRESH
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self.send_data(0xF7)
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self.send_command(0x20) # DISPLAY_REFRESH
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self.ReadBusy()
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def Clear(self):
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if self.width%8 == 0:
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linewidth = int(self.width/8)
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else:
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linewidth = int(self.width/8) + 1
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self.send_command(0x24) # DATA_START_TRANSMISSION_1
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self.send_data2([0xff] * int(self.height * linewidth))
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self.send_command(0x26) # DATA_START_TRANSMISSION_2
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self.send_data2([0x00] * int(self.height * linewidth))
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self.send_command(0x22) # DISPLAY_REFRESH
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self.send_data(0xF7)
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self.send_command(0x20) # DISPLAY_REFRESH
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self.ReadBusy()
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def sleep(self):
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self.send_command(0x10) #enter deep sleep
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self.send_data(0x01)
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epdconfig.delay_ms(2000)
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epdconfig.module_exit()
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### END OF FILE ###
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