# ***************************************************************************** # * | File : epd4in2bc.py # * | Author : Waveshare team # * | Function : Electronic paper driver # * | Info : # *---------------- # * | This version: V4.1 # * | Date : 2022-08-10 # # | 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 = 400 EPD_HEIGHT = 300 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 self.flag = 0 if (epdconfig.module_init(cleanup=True) != 0): return -1 # 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(5) 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.DEV_SPI_write(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.DEV_SPI_write(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) def ReadBusy(self): logger.debug("e-Paper busy") if(self.flag == 1): while(epdconfig.digital_read(self.busy_pin) == 1): epdconfig.delay_ms(100) else: while(epdconfig.digital_read(self.busy_pin) == 0): epdconfig.delay_ms(100) logger.debug("e-Paper busy release") def TurnOnDisplay(self): if(self.flag == 1): self.send_command(0x22) self.send_data(0xF7) self.send_command(0x20) self.ReadBusy() else: self.send_command(0x12) epdconfig.delay_ms(100) self.ReadBusy() def init(self): i = 0x00 self.reset() self.send_command(0x2F) epdconfig.delay_ms(100) epdconfig.digital_write(self.dc_pin, 1) epdconfig.digital_write(self.cs_pin, 0) i = epdconfig.DEV_SPI_read() epdconfig.digital_write(self.cs_pin, 1) # print(i) if(i == 0x01): self.flag = 1 self.ReadBusy() self.send_command(0x12) self.ReadBusy() self.send_command(0x3C) self.send_data(0x05) self.send_command(0x18) self.send_data(0x80) self.send_command(0x11) self.send_data(0x03) self.send_command(0x44) self.send_data(0x00) self.send_data(self.width//8-1) self.send_command(0x45) self.send_data(0x00) self.send_data(0x00) self.send_data((self.height-1)%256) self.send_data((self.height-1)//256) self.send_command(0x4E) self.send_data(0x00) self.send_command(0x4F) self.send_data(0x00) self.send_data(0x00) self.ReadBusy() else: self.flag = 0 self.send_command(0x04) # POWER_ON self.ReadBusy() self.send_command(0x00) # panel setting self.send_data(0x0f) return 0 def getbuffer(self, image): # logger.debug("bufsiz = ",int(self.width/8) * self.height) buf = [0xFF] * (int(self.width/8) * self.height) image_monocolor = image.convert('1') imwidth, imheight = image_monocolor.size pixels = image_monocolor.load() # logger.debug("imwidth = %d, imheight = %d",imwidth,imheight) if(imwidth == self.width and imheight == self.height): logger.debug("Horizontal") for y in range(imheight): for x in range(imwidth): # Set the bits for the column of pixels at the current position. if pixels[x, y] == 0: buf[int((x + y * self.width) / 8)] &= ~(0x80 >> (x % 8)) elif(imwidth == self.height and imheight == self.width): logger.debug("Vertical") for y in range(imheight): for x in range(imwidth): newx = y newy = self.height - x - 1 if pixels[x, y] == 0: buf[int((newx + newy*self.width) / 8)] &= ~(0x80 >> (y % 8)) return buf def display(self, imageblack, imagered): high = self.height if( self.width % 8 == 0) : wide = self.width // 8 else : wide = self.width // 8 + 1 if(self.flag == 1): self.send_command(0x24) for j in range(0, high): for i in range(0, wide): self.send_data(imageblack[i + j * wide]) self.send_command(0x26) for j in range(0, high): for i in range(0, wide): self.send_data(~imagered[i + j * wide]) else: self.send_command(0x10) for j in range(0, high): for i in range(0, wide): self.send_data(imageblack[i + j * wide]) self.send_command(0x13) for j in range(0, high): for i in range(0, wide): self.send_data(imagered[i + j * wide]) self.TurnOnDisplay() def Clear(self): high = self.height if( self.width % 8 == 0) : wide = self.width // 8 else : wide = self.width // 8 + 1 if(self.flag == 1): self.send_command(0x24) for j in range(0, high): for i in range(0, wide): self.send_data(0xff) self.send_command(0x26) for j in range(0, high): for i in range(0, wide): self.send_data(0x00) else: self.send_command(0x10) for j in range(0, high): for i in range(0, wide): self.send_data(0xff) self.send_command(0x13) for j in range(0, high): for i in range(0, wide): self.send_data(0xff) self.TurnOnDisplay() def sleep(self): if(self.flag == 1): self.send_command(0X10) self.send_data(0x03) else: self.send_command(0X50) self.send_data(0xf7) self.send_command(0X02) self.ReadBusy() self.send_command(0X07) self.send_data(0xA5) epdconfig.delay_ms(2000) epdconfig.module_exit() ### END OF FILE ###