# ***************************************************************************** # * | File : epd7in5b_V2.py # * | Author : Waveshare team # * | Function : Electronic paper driver # * | Info : # *---------------- # * | This version: V4.2 # * | Date : 2022-01-08 # # | 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 = 800 EPD_HEIGHT = 480 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(200) epdconfig.digital_write(self.reset_pin, 0) epdconfig.delay_ms(4) 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.spi_writebyte([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.spi_writebyte([data]) epdconfig.digital_write(self.cs_pin, 1) def send_data2(self, data): #faster 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") self.send_command(0x71) busy = epdconfig.digital_read(self.busy_pin) while(busy == 0): self.send_command(0x71) busy = epdconfig.digital_read(self.busy_pin) epdconfig.delay_ms(200) logger.debug("e-Paper busy release") def init(self): if (epdconfig.module_init() != 0): return -1 self.reset() # self.send_command(0x06) # btst # self.send_data(0x17) # self.send_data(0x17) # self.send_data(0x38) # If an exception is displayed, try using 0x38 # self.send_data(0x17) self.send_command(0x01) # POWER SETTING self.send_data(0x07) self.send_data(0x07) # VGH=20V,VGL=-20V self.send_data(0x3f) # VDH=15V self.send_data(0x3f) # VDL=-15V self.send_command(0x04) # POWER ON epdconfig.delay_ms(100) self.ReadBusy() self.send_command(0X00) # PANNEL SETTING self.send_data(0x0F) # KW-3f KWR-2F BWROTP-0f BWOTP-1f self.send_command(0x61) # tres self.send_data(0x03) # source 800 self.send_data(0x20) self.send_data(0x01) # gate 480 self.send_data(0xE0) self.send_command(0X15) self.send_data(0x00) self.send_command(0X50) # VCOM AND DATA INTERVAL SETTING self.send_data(0x11) self.send_data(0x07) self.send_command(0X60) # TCON SETTING self.send_data(0x22) self.send_command(0x65) self.send_data(0x00) self.send_data(0x00) self.send_data(0x00) self.send_data(0x00) return 0 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')) # The bytes need to be inverted, because in the PIL world 0=black and 1=white, but # in the e-paper world 0=white and 1=black. for i in range(len(buf)): buf[i] ^= 0xFF return buf def display(self, imageblack, imagered): self.send_command(0x10) # The black bytes need to be inverted back from what getbuffer did for i in range(len(imageblack)): imageblack[i] ^= 0xFF self.send_data2(imageblack) self.send_command(0x13) self.send_data2(imagered) self.send_command(0x12) epdconfig.delay_ms(100) self.ReadBusy() def Clear(self): buf = [0x00] * (int(self.width/8) * self.height) buf2 = [0xff] * (int(self.width/8) * self.height) self.send_command(0x10) self.send_data2(buf2) self.send_command(0x13) self.send_data2(buf) self.send_command(0x12) epdconfig.delay_ms(100) self.ReadBusy() def sleep(self): self.send_command(0x02) # POWER_OFF self.ReadBusy() self.send_command(0x07) # DEEP_SLEEP self.send_data(0XA5) epdconfig.delay_ms(2000) epdconfig.module_exit() ### END OF FILE ###