text: # //*****************************************************************************
  # * | File        :	  epd7in5.py
  # * | Author      :   Waveshare team
  # * | Function    :   Electronic paper driver
  # * | Info        :
  # *----------------
  # * |	This version:   V3.0
  # * | Date        :   2018-11-12
  # * | Info        :   python2 demo
  # * 1.Remove:
  #   digital_write(self, pin, value)
  #   digital_read(self, pin)
  #   delay_ms(self, delaytime)
  #   set_lut(self, lut)
  #   self.lut = self.lut_full_update
  # * 2.Change:
  #   display_frame -> TurnOnDisplay
  #   set_memory_area -> SetWindow
  #   set_memory_pointer -> SetCursor
  #   get_frame_buffer -> getbuffer
  #   set_frame_memory -> display
  # * 3.How to use
  #   epd = epd2in7.EPD()
  #   epd.init(epd.lut_full_update)
  #   image = Image.new('1', (epd7in5.EPD_WIDTH, epd7in5.EPD_HEIGHT), 255)
  #   ...
  #   drawing ......
  #   ...
  #   epd.display(getbuffer(image))
  # ******************************************************************************//
  # 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 epdconfig
  from PIL import Image
  import RPi.GPIO as GPIO
  
  # Display resolution
  EPD_WIDTH       = 640
  EPD_HEIGHT      = 384
  
  # EPD7IN5 commands
  PANEL_SETTING                               = 0x00
  POWER_SETTING                               = 0x01
  POWER_OFF                                   = 0x02
  POWER_OFF_SEQUENCE_SETTING                  = 0x03
  POWER_ON                                    = 0x04
  POWER_ON_MEASURE                            = 0x05
  BOOSTER_SOFT_START                          = 0x06
  DEEP_SLEEP                                  = 0x07
  DATA_START_TRANSMISSION_1                   = 0x10
  DATA_STOP                                   = 0x11
  DISPLAY_REFRESH                             = 0x12
  IMAGE_PROCESS                               = 0x13
  LUT_FOR_VCOM                                = 0x20
  LUT_BLUE                                    = 0x21
  LUT_WHITE                                   = 0x22
  LUT_GRAY_1                                  = 0x23
  LUT_GRAY_2                                  = 0x24
  LUT_RED_0                                   = 0x25
  LUT_RED_1                                   = 0x26
  LUT_RED_2                                   = 0x27
  LUT_RED_3                                   = 0x28
  LUT_XON                                     = 0x29
  PLL_CONTROL                                 = 0x30
  TEMPERATURE_SENSOR_COMMAND                  = 0x40
  TEMPERATURE_CALIBRATION                     = 0x41
  TEMPERATURE_SENSOR_WRITE                    = 0x42
  TEMPERATURE_SENSOR_READ                     = 0x43
  VCOM_AND_DATA_INTERVAL_SETTING              = 0x50
  LOW_POWER_DETECTION                         = 0x51
  TCON_SETTING                                = 0x60
  TCON_RESOLUTION                             = 0x61
  SPI_FLASH_CONTROL                           = 0x65
  REVISION                                    = 0x70
  GET_STATUS                                  = 0x71
  AUTO_MEASUREMENT_VCOM                       = 0x80
  READ_VCOM_VALUE                             = 0x81
  VCM_DC_SETTING                              = 0x82
  
  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, GPIO.HIGH)
          epdconfig.delay_ms(200) 
          epdconfig.digital_write(self.reset_pin, GPIO.LOW)         # module reset
          epdconfig.delay_ms(200)
          epdconfig.digital_write(self.reset_pin, GPIO.HIGH)
          epdconfig.delay_ms(200)   
  
      def send_command(self, command):
          epdconfig.digital_write(self.cs_pin, GPIO.LOW)
          epdconfig.digital_write(self.dc_pin, GPIO.LOW)
          epdconfig.spi_writebyte([command])
          epdconfig.digital_write(self.cs_pin, GPIO.HIGH)
  
      def send_data(self, data):
          epdconfig.digital_write(self.cs_pin, GPIO.LOW)
          epdconfig.digital_write(self.dc_pin, GPIO.HIGH)
          epdconfig.spi_writebyte([data])
          epdconfig.digital_write(self.cs_pin, GPIO.HIGH)
          
      def wait_until_idle(self):
          print("e-Paper busy")
          while(epdconfig.digital_read(self.busy_pin) == 0):      # 0: idle, 1: busy
              epdconfig.delay_ms(100)    
          print("e-Paper busy release")
          
      def init(self):
          if (epdconfig.module_init() != 0):
              return -1
          # EPD hardware init start
          self.reset()
          
          self.send_command(POWER_SETTING)
          self.send_data(0x37)
          self.send_data(0x00)
          self.send_command(PANEL_SETTING)
          self.send_data(0xCF)
          self.send_data(0x08)
          self.send_command(BOOSTER_SOFT_START)
          self.send_data(0xc7)
          self.send_data(0xcc)
          self.send_data(0x28)
          self.send_command(POWER_ON)
          self.wait_until_idle()
          self.send_command(PLL_CONTROL)
          self.send_data(0x3c)
          self.send_command(TEMPERATURE_CALIBRATION)
          self.send_data(0x00)
          self.send_command(VCOM_AND_DATA_INTERVAL_SETTING)
          self.send_data(0x77)
          self.send_command(TCON_SETTING)
          self.send_data(0x22)
          self.send_command(TCON_RESOLUTION)
          self.send_data(EPD_WIDTH >> 8)     #source 640
          self.send_data(EPD_WIDTH & 0xff)
          self.send_data(EPD_HEIGHT >> 8)     #gate 384
          self.send_data(EPD_HEIGHT & 0xff)
          self.send_command(VCM_DC_SETTING)
          self.send_data(0x1E)      #decide by LUT file
          self.send_command(0xe5)           #FLASH MODE
          self.send_data(0x03)
          
          # EPD hardware init end
          return 0
  
      def getbuffer(self, image):
          buf = [0x00] * (self.width * self.height // 4)
          image_monocolor = image.convert('1')
          imwidth, imheight = image_monocolor.size
          pixels = image_monocolor.load()
          print("imwidth = ", imwidth, "imheight = ", imheight)
          if(imwidth == self.width and imheight == self.height):
              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] < 64:           # black
                          buf[(x + y * self.width) // 4] &= ~(0xC0 >> (x % 4 * 2))
                      elif pixels[x, y] < 192:     # convert gray to red
                          buf[(x + y * self.width) // 4] &= ~(0xC0 >> (x % 4 * 2))
                          buf[(x + y * self.width) // 4] |= 0x40 >> (x % 4 * 2)
                      else:                           # white
                          buf[(x + y * self.width) // 4] |= 0xC0 >> (x % 4 * 2)
          elif(imwidth == self.height and imheight == self.width):
              for y in range(imheight):
                  for x in range(imwidth):
                      newx = y
                      newy = self.height - x - 1                    
                      if pixels[x, y] < 64:           # black
                          buf[(newx + newy*self.width) // 4] &= ~(0xC0 >> (y % 4 * 2))
                      elif pixels[x, y] < 192:     # convert gray to red
                          buf[(newx + newy*self.width) // 4] &= ~(0xC0 >> (y % 4 * 2))
                          buf[(newx + newy*self.width) // 4] |= 0x40 >> (y % 4 * 2)
                      else:                           # white
                          buf[(newx + newy*self.width) // 4] |= 0xC0 >> (y % 4 * 2)
          return buf    
          
      def display(self, image):
          self.send_command(DATA_START_TRANSMISSION_1)
          for i in range(0, self.width // 4 * self.height):
              temp1 = image[i]
              j = 0
              while (j < 4):
                  if ((temp1 & 0xC0) == 0xC0):
                      temp2 = 0x03
                  elif ((temp1 & 0xC0) == 0x00):
                      temp2 = 0x00
                  else:
                      temp2 = 0x04
                  temp2 = (temp2 << 4) & 0xFF
                  temp1 = (temp1 << 2) & 0xFF
                  j += 1
                  if((temp1 & 0xC0) == 0xC0):
                      temp2 |= 0x03
                  elif ((temp1 & 0xC0) == 0x00):
                      temp2 |= 0x00
                  else:
                      temp2 |= 0x04
                  temp1 = (temp1 << 2) & 0xFF
                  self.send_data(temp2)
                  j += 1
          self.send_command(DISPLAY_REFRESH)
          epdconfig.delay_ms(100)
          self.wait_until_idle()
          
      def Clear(self, color):
          self.send_command(DATA_START_TRANSMISSION_1)
          for i in range(0, self.width // 4 * self.height):
              for j in range(0, 4):
                  self.send_data(0x33)
          self.send_command(DISPLAY_REFRESH)
          self.wait_until_idle()
  
      def sleep(self):
          self.send_command(POWER_OFF)
          self.wait_until_idle()
          self.send_command(DEEP_SLEEP)
          self.send_data(0XA5)
  ### END OF FILE ###
  
  