# ***************************************************************************** # * | 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 ###