text: # *****************************************************************************
  # * | File        :	  epd2in9.py
  # * | Author      :   Waveshare team
  # * | Function    :   Electronic paper driver
  # * | Info        :
  # *----------------
  # * | This version:   V4.0
  # * | Date        :   2019-06-20
  # # | 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       = 128
  EPD_HEIGHT      = 296
  
  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_full_update = [
          0x50, 0xAA, 0x55, 0xAA, 0x11, 0x00,
          0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
          0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
          0x00, 0x00, 0xFF, 0xFF, 0x1F, 0x00,
          0x00, 0x00, 0x00, 0x00, 0x00, 0x00
      ]
  
      lut_partial_update  = [
          0x10, 0x18, 0x18, 0x08, 0x18, 0x18,
          0x08, 0x00, 0x00, 0x00, 0x00, 0x00,
          0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
          0x00, 0x00, 0x13, 0x14, 0x44, 0x12,
          0x00, 0x00, 0x00, 0x00, 0x00, 0x00
      ]
          
      # 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.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 ReadBusy(self):
          while(epdconfig.digital_read(self.busy_pin) == 1):      #  0: idle, 1: busy
              epdconfig.delay_ms(200) 
  
      def TurnOnDisplay(self):
          self.send_command(0x22) # DISPLAY_UPDATE_CONTROL_2
          self.send_data(0xC4)
          self.send_command(0x20) # MASTER_ACTIVATION
          self.send_command(0xFF) # TERMINATE_FRAME_READ_WRITE
          
          logging.debug("e-Paper busy")
          self.ReadBusy()
          logging.debug("e-Paper busy release")  
  
      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)
  
      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 >> 3) & 0xFF)
          self.send_command(0x4F) # SET_RAM_Y_ADDRESS_COUNTER
          self.send_data(y & 0xFF)
          self.send_data((y >> 8) & 0xFF)
          self.ReadBusy()
          
      def init(self, lut):
          if (epdconfig.module_init() != 0):
              return -1
          # EPD hardware init start
          self.reset()
          
          self.send_command(0x01) # DRIVER_OUTPUT_CONTROL
          self.send_data((EPD_HEIGHT - 1) & 0xFF)
          self.send_data(((EPD_HEIGHT - 1) >> 8) & 0xFF)
          self.send_data(0x00) # GD = 0 SM = 0 TB = 0
          
          self.send_command(0x0C) # BOOSTER_SOFT_START_CONTROL 
          self.send_data(0xD7)
          self.send_data(0xD6)
          self.send_data(0x9D)
          
          self.send_command(0x2C) # WRITE_VCOM_REGISTER
          self.send_data(0xA8) # VCOM 7C
          
          self.send_command(0x3A) # SET_DUMMY_LINE_PERIOD
          self.send_data(0x1A) # 4 dummy lines per gate
          
          self.send_command(0x3B) # SET_GATE_TIME
          self.send_data(0x08) # 2us per line
          
          self.send_command(0x11) # DATA_ENTRY_MODE_SETTING
          self.send_data(0x03) # X increment Y increment
          
          self.send_command(0x32) # WRITE_LUT_REGISTER
          for i in range(0, len(lut)):
              self.send_data(lut[i])
          # EPD hardware init end
          return 0
  
      def getbuffer(self, image):
          # logging.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()
          # logging.debug("imwidth = %d, imheight = %d",imwidth,imheight)
          if(imwidth == self.width and imheight == self.height):
              logging.debug("Vertical")
              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):
              logging.debug("Horizontal")
              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, image):
          if (image == None):
              return            
          self.SetWindow(0, 0, self.width - 1, self.height - 1)
          for j in range(0, self.height):
              self.SetCursor(0, j)
              self.send_command(0x24) # WRITE_RAM
              for i in range(0, int(self.width / 8)):
                  self.send_data(image[i + j * int(self.width / 8)])   
          self.TurnOnDisplay()
          
      def Clear(self, color):
          self.SetWindow(0, 0, self.width - 1, self.height - 1)
          for j in range(0, self.height):
              self.SetCursor(0, j)
              self.send_command(0x24) # WRITE_RAM
              for i in range(0, int(self.width / 8)):
                  self.send_data(color)   
          self.TurnOnDisplay()
  
      def sleep(self):
          self.send_command(0x10) # DEEP_SLEEP_MODE
          self.send_data(0x01)
          
      def Dev_exit(self):
          epdconfig.module_exit()
  ### END OF FILE ###
  
  