# ***************************************************************************** # * | File : epd2in13_V3.py # * | Author : Waveshare team # * | Function : Electronic paper driver # * | Info : # *---------------- # * | This version: V1.2 # * | Date : 2022-08-9 # # | 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 lut_partial_update= [ 0x0,0x40,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0, 0x80,0x80,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0, 0x40,0x40,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0, 0x0,0x80,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0, 0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0, 0x14,0x0,0x0,0x0,0x0,0x0,0x0, 0x1,0x0,0x0,0x0,0x0,0x0,0x0, 0x1,0x0,0x0,0x0,0x0,0x0,0x0, 0x0,0x0,0x0,0x0,0x0,0x0,0x0, 0x0,0x0,0x0,0x0,0x0,0x0,0x0, 0x0,0x0,0x0,0x0,0x0,0x0,0x0, 0x0,0x0,0x0,0x0,0x0,0x0,0x0, 0x0,0x0,0x0,0x0,0x0,0x0,0x0, 0x0,0x0,0x0,0x0,0x0,0x0,0x0, 0x0,0x0,0x0,0x0,0x0,0x0,0x0, 0x0,0x0,0x0,0x0,0x0,0x0,0x0, 0x0,0x0,0x0,0x0,0x0,0x0,0x0, 0x22,0x22,0x22,0x22,0x22,0x22,0x0,0x0,0x0, 0x22,0x17,0x41,0x00,0x32,0x36, ] lut_full_update = [ 0x80,0x4A,0x40,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0, 0x40,0x4A,0x80,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0, 0x80,0x4A,0x40,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0, 0x40,0x4A,0x80,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0, 0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0, 0xF,0x0,0x0,0x0,0x0,0x0,0x0, 0xF,0x0,0x0,0xF,0x0,0x0,0x2, 0xF,0x0,0x0,0x0,0x0,0x0,0x0, 0x1,0x0,0x0,0x0,0x0,0x0,0x0, 0x0,0x0,0x0,0x0,0x0,0x0,0x0, 0x0,0x0,0x0,0x0,0x0,0x0,0x0, 0x0,0x0,0x0,0x0,0x0,0x0,0x0, 0x0,0x0,0x0,0x0,0x0,0x0,0x0, 0x0,0x0,0x0,0x0,0x0,0x0,0x0, 0x0,0x0,0x0,0x0,0x0,0x0,0x0, 0x0,0x0,0x0,0x0,0x0,0x0,0x0, 0x0,0x0,0x0,0x0,0x0,0x0,0x0, 0x22,0x22,0x22,0x22,0x22,0x22,0x0,0x0,0x0, 0x22,0x17,0x41,0x0,0x32,0x36, ] ''' function :Hardware reset parameter: ''' 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) ''' function :send command parameter: command : Command register ''' 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) ''' function :send data parameter: data : Write 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) ''' function :Wait until the busy_pin goes LOW parameter: ''' def ReadBusy(self): logger.debug("e-Paper busy") while(epdconfig.digital_read(self.busy_pin) == 1): # 0: idle, 1: busy epdconfig.delay_ms(10) logger.debug("e-Paper busy release") ''' function : Turn On Display parameter: ''' def TurnOnDisplay(self): self.send_command(0x22) # Display Update Control self.send_data(0xC7) self.send_command(0x20) # Activate Display Update Sequence self.ReadBusy() ''' function : Turn On Display Part parameter: ''' def TurnOnDisplayPart(self): self.send_command(0x22) # Display Update Control self.send_data(0x0f) # fast:0x0c, quality:0x0f, 0xcf self.send_command(0x20) # Activate Display Update Sequence self.ReadBusy() ''' function : Set lut parameter: lut : lut data ''' def Lut(self, lut): self.send_command(0x32) for i in range(0, 153): self.send_data(lut[i]) self.ReadBusy() ''' function : Send lut data and configuration parameter: lut : lut data ''' def SetLut(self, lut): self.Lut(lut) self.send_command(0x3f) self.send_data(lut[153]) self.send_command(0x03) # gate voltage self.send_data(lut[154]) self.send_command(0x04) # source voltage self.send_data(lut[155]) # VSH self.send_data(lut[156]) # VSH2 self.send_data(lut[157]) # VSL self.send_command(0x2c) # VCOM self.send_data(lut[158]) ''' function : Setting the display window parameter: xstart : X-axis starting position ystart : Y-axis starting position xend : End position of X-axis yend : End position of Y-axis ''' def SetWindow(self, x_start, y_start, x_end, y_end): self.send_command(0x44) # SET_RAM_X_ADDRESS_START_END_POSITION # x point must be the multiple of 8 or the last 3 bits will be ignored self.send_data((x_start>>3) & 0xFF) self.send_data((x_end>>3) & 0xFF) self.send_command(0x45) # SET_RAM_Y_ADDRESS_START_END_POSITION self.send_data(y_start & 0xFF) self.send_data((y_start >> 8) & 0xFF) self.send_data(y_end & 0xFF) self.send_data((y_end >> 8) & 0xFF) ''' function : Set Cursor parameter: x : X-axis starting position y : Y-axis starting position ''' def SetCursor(self, x, y): self.send_command(0x4E) # SET_RAM_X_ADDRESS_COUNTER # x point must be the multiple of 8 or the last 3 bits will be ignored self.send_data(x & 0xFF) self.send_command(0x4F) # SET_RAM_Y_ADDRESS_COUNTER self.send_data(y & 0xFF) self.send_data((y >> 8) & 0xFF) ''' function : Initialize the e-Paper register parameter: ''' def init(self): if (epdconfig.module_init() != 0): return -1 # EPD hardware init start self.reset() self.ReadBusy() self.send_command(0x12) #SWRESET self.ReadBusy() 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.SetWindow(0, 0, self.width-1, self.height-1) self.SetCursor(0, 0) self.send_command(0x3c) self.send_data(0x05) self.send_command(0x21) # Display update control self.send_data(0x00) self.send_data(0x80) self.send_command(0x18) self.send_data(0x80) self.ReadBusy() self.SetLut(self.lut_full_update) return 0 ''' function : Display images parameter: image : Image data ''' 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 ''' function : Sends the image buffer in RAM to e-Paper and displays parameter: image : Image data ''' def display(self, image): if self.width%8 == 0: linewidth = int(self.width/8) else: linewidth = int(self.width/8) + 1 self.send_command(0x24) for j in range(0, self.height): for i in range(0, linewidth): self.send_data(image[i + j * linewidth]) self.TurnOnDisplay() ''' function : Sends the image buffer in RAM to e-Paper and partial refresh parameter: image : Image data ''' def displayPartial(self, image): epdconfig.digital_write(self.reset_pin, 0) epdconfig.delay_ms(1) epdconfig.digital_write(self.reset_pin, 1) self.SetLut(self.lut_partial_update) self.send_command(0x37) self.send_data(0x00) self.send_data(0x00) self.send_data(0x00) self.send_data(0x00) self.send_data(0x00) self.send_data(0x40) self.send_data(0x00) self.send_data(0x00) self.send_data(0x00) self.send_data(0x00) self.send_command(0x3C) #BorderWavefrom self.send_data(0x80) self.send_command(0x22) self.send_data(0xC0) self.send_command(0x20) self.ReadBusy() self.SetWindow(0, 0, self.width - 1, self.height - 1) self.SetCursor(0, 0) self.send_command(0x24) # WRITE_RAM # for j in range(0, self.height): # for i in range(0, linewidth): # self.send_data(image[i + j * linewidth]) self.send_data2(image) self.TurnOnDisplayPart() ''' function : Refresh a base image parameter: image : Image data ''' def displayPartBaseImage(self, image): self.send_command(0x24) self.send_data2(image) self.send_command(0x26) self.send_data2(image) self.TurnOnDisplay() ''' function : Clear screen parameter: ''' def Clear(self, color): if self.width%8 == 0: linewidth = int(self.width/8) else: linewidth = int(self.width/8) + 1 # logger.debug(linewidth) self.send_command(0x24) self.send_data2([color] * int(self.height * linewidth)) self.TurnOnDisplay() ''' function : Enter sleep mode parameter: ''' def sleep(self): self.send_command(0x10) #enter deep sleep self.send_data(0x01) epdconfig.delay_ms(2000) epdconfig.module_exit() ### END OF FILE ###