187 lines
6.3 KiB
Python
187 lines
6.3 KiB
Python
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# *****************************************************************************
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# * | File : epd2in7b_V2.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: V1.0
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# * | Date : 2020-10-22
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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 = 176
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EPD_HEIGHT = 264
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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)
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epdconfig.delay_ms(2)
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epdconfig.digital_write(self.reset_pin, 1)
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epdconfig.delay_ms(200)
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# Send Command
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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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# Send Data
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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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# Read Busy
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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): # 0: idle, 1: busy
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epdconfig.delay_ms(10)
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logger.debug("e-Paper busy release")
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# Setting the display window
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def SetWindows(self, Xstart, Ystart, Xend, Yend):
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self.send_command(0x44)
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self.send_data((Xstart >> 3) & 0xff)
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self.send_data((Xend >> 3) & 0xff)
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self.send_command(0x45)
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self.send_data(Ystart & 0xff)
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self.send_data((Ystart >> 8) & 0xff)
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self.send_data(Yend & 0xff)
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self.send_data((Yend >> 8) & 0xff)
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# Set Cursor
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def SetCursor(self, Xstart, Ystart):
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self.send_command(0x4E)
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self.send_data(Xstart & 0xff)
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self.send_command(0x4F)
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self.send_data(Ystart & 0xff)
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self.send_data((Ystart >> 8) & 0xff)
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# Initialize the e-Paper register
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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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self.reset()
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self.ReadBusy()
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self.send_command(0x12)
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self.ReadBusy()
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self.send_command(0x00)
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self.send_data(0x27)
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self.send_data(0x01)
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self.send_data(0x00)
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self.send_command(0x11)
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self.send_data(0x03)
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self.SetWindows(0, 0, self.width-1, self.height-1)
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self.SetCursor(0, 0)
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return 0
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def getbuffer(self, image):
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# logger.debug("bufsiz = ",int(self.width/8) * self.height)
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buf = [0xFF] * (int(self.width/8) * self.height)
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image_monocolor = image.convert('1')
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imwidth, imheight = image_monocolor.size
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pixels = image_monocolor.load()
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# logger.debug("imwidth = %d, imheight = %d",imwidth,imheight)
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if(imwidth == self.width and imheight == self.height):
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logger.debug("Vertical")
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for y in range(imheight):
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for x in range(imwidth):
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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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elif(imwidth == self.height and imheight == self.width):
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logger.debug("Horizontal")
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for y in range(imheight):
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for x in range(imwidth):
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newx = y
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newy = self.height - x - 1
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if pixels[x, y] == 0:
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buf[int((newx + newy*self.width) / 8)] &= ~(0x80 >> (y % 8))
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return buf
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# Sends the image buffer in RAM to e-Paper and displays
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def display(self, imageblack, imagered):
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Width = self.width / 8
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Height = self.height
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self.send_command(0x24)
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for i in range(0, int(Width * Height)):
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self.send_data(imageblack[i])
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self.send_command(0x26)
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for i in range(0, int(Width * Height)):
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self.send_data(~imagered[i])
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self.TurnOnDisplay()
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# Clear the screen
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def Clear(self):
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self.send_command(0x24)
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for i in range(0, int(self.width * self.height / 8)):
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self.send_data(0xff)
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self.send_command(0x26)
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for i in range(0, int(self.width * self.height / 8)):
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self.send_data(0x00)
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self.TurnOnDisplay()
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# Turn on display
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def TurnOnDisplay(self):
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self.send_command(0x20)
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self.ReadBusy()
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# Enter sleep mode
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def sleep(self):
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self.send_command(0x10)
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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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