text: #!/usr/bin/env python
  #
  # This library is for Grove - OLED Display 0.96"(https://www.seeedstudio.com/Grove-OLED-Display-0.96%22-p-781.html)
  #
  # This is the library for Grove Base Hat which used to connect grove sensors for raspberry pi.
  #
  
  '''
  ## License
  The MIT License (MIT)
  Grove Base Hat for the Raspberry Pi, used to connect grove sensors.
  Copyright (C) 2018  Seeed Technology Co.,Ltd. 
  Permission is hereby granted, free of charge, to any person obtaining a copy
  of this software and associated documentation 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
  furnished 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 FOR 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 time
  import sys
  
  from grove.i2c import Bus
  
  _COMMAND_MODE = 0x80
  _DATA_MODE = 0x40
  _NORMAL_DISPLAY = 0xA6
  
  _DISPLAY_OFF = 0xAE
  _DISPLAY_ON = 0xAF
  _INVERSE_DISPLAY = 0xA7
  _SET_BRIGHTNESS = 0x81
  
  
  BasicFont = [[0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00],
               [0x00, 0x00, 0x5F, 0x00, 0x00, 0x00, 0x00, 0x00],
               [0x00, 0x00, 0x07, 0x00, 0x07, 0x00, 0x00, 0x00],
               [0x00, 0x14, 0x7F, 0x14, 0x7F, 0x14, 0x00, 0x00],
               [0x00, 0x24, 0x2A, 0x7F, 0x2A, 0x12, 0x00, 0x00],
               [0x00, 0x23, 0x13, 0x08, 0x64, 0x62, 0x00, 0x00],
               [0x00, 0x36, 0x49, 0x55, 0x22, 0x50, 0x00, 0x00],
               [0x00, 0x00, 0x05, 0x03, 0x00, 0x00, 0x00, 0x00],
               [0x00, 0x1C, 0x22, 0x41, 0x00, 0x00, 0x00, 0x00],
               [0x00, 0x41, 0x22, 0x1C, 0x00, 0x00, 0x00, 0x00],
               [0x00, 0x08, 0x2A, 0x1C, 0x2A, 0x08, 0x00, 0x00],
               [0x00, 0x08, 0x08, 0x3E, 0x08, 0x08, 0x00, 0x00],
               [0x00, 0xA0, 0x60, 0x00, 0x00, 0x00, 0x00, 0x00],
               [0x00, 0x08, 0x08, 0x08, 0x08, 0x08, 0x00, 0x00],
               [0x00, 0x60, 0x60, 0x00, 0x00, 0x00, 0x00, 0x00],
               [0x00, 0x20, 0x10, 0x08, 0x04, 0x02, 0x00, 0x00],
               [0x00, 0x3E, 0x51, 0x49, 0x45, 0x3E, 0x00, 0x00],
               [0x00, 0x00, 0x42, 0x7F, 0x40, 0x00, 0x00, 0x00],
               [0x00, 0x62, 0x51, 0x49, 0x49, 0x46, 0x00, 0x00],
               [0x00, 0x22, 0x41, 0x49, 0x49, 0x36, 0x00, 0x00],
               [0x00, 0x18, 0x14, 0x12, 0x7F, 0x10, 0x00, 0x00],
               [0x00, 0x27, 0x45, 0x45, 0x45, 0x39, 0x00, 0x00],
               [0x00, 0x3C, 0x4A, 0x49, 0x49, 0x30, 0x00, 0x00],
               [0x00, 0x01, 0x71, 0x09, 0x05, 0x03, 0x00, 0x00],
               [0x00, 0x36, 0x49, 0x49, 0x49, 0x36, 0x00, 0x00],
               [0x00, 0x06, 0x49, 0x49, 0x29, 0x1E, 0x00, 0x00],
               [0x00, 0x00, 0x36, 0x36, 0x00, 0x00, 0x00, 0x00],
               [0x00, 0x00, 0xAC, 0x6C, 0x00, 0x00, 0x00, 0x00],
               [0x00, 0x08, 0x14, 0x22, 0x41, 0x00, 0x00, 0x00],
               [0x00, 0x14, 0x14, 0x14, 0x14, 0x14, 0x00, 0x00],
               [0x00, 0x41, 0x22, 0x14, 0x08, 0x00, 0x00, 0x00],
               [0x00, 0x02, 0x01, 0x51, 0x09, 0x06, 0x00, 0x00],
               [0x00, 0x32, 0x49, 0x79, 0x41, 0x3E, 0x00, 0x00],
               [0x00, 0x7E, 0x09, 0x09, 0x09, 0x7E, 0x00, 0x00],
               [0x00, 0x7F, 0x49, 0x49, 0x49, 0x36, 0x00, 0x00],
               [0x00, 0x3E, 0x41, 0x41, 0x41, 0x22, 0x00, 0x00],
               [0x00, 0x7F, 0x41, 0x41, 0x22, 0x1C, 0x00, 0x00],
               [0x00, 0x7F, 0x49, 0x49, 0x49, 0x41, 0x00, 0x00],
               [0x00, 0x7F, 0x09, 0x09, 0x09, 0x01, 0x00, 0x00],
               [0x00, 0x3E, 0x41, 0x41, 0x51, 0x72, 0x00, 0x00],
               [0x00, 0x7F, 0x08, 0x08, 0x08, 0x7F, 0x00, 0x00],
               [0x00, 0x41, 0x7F, 0x41, 0x00, 0x00, 0x00, 0x00],
               [0x00, 0x20, 0x40, 0x41, 0x3F, 0x01, 0x00, 0x00],
               [0x00, 0x7F, 0x08, 0x14, 0x22, 0x41, 0x00, 0x00],
               [0x00, 0x7F, 0x40, 0x40, 0x40, 0x40, 0x00, 0x00],
               [0x00, 0x7F, 0x02, 0x0C, 0x02, 0x7F, 0x00, 0x00],
               [0x00, 0x7F, 0x04, 0x08, 0x10, 0x7F, 0x00, 0x00],
               [0x00, 0x3E, 0x41, 0x41, 0x41, 0x3E, 0x00, 0x00],
               [0x00, 0x7F, 0x09, 0x09, 0x09, 0x06, 0x00, 0x00],
               [0x00, 0x3E, 0x41, 0x51, 0x21, 0x5E, 0x00, 0x00],
               [0x00, 0x7F, 0x09, 0x19, 0x29, 0x46, 0x00, 0x00],
               [0x00, 0x26, 0x49, 0x49, 0x49, 0x32, 0x00, 0x00],
               [0x00, 0x01, 0x01, 0x7F, 0x01, 0x01, 0x00, 0x00],
               [0x00, 0x3F, 0x40, 0x40, 0x40, 0x3F, 0x00, 0x00],
               [0x00, 0x1F, 0x20, 0x40, 0x20, 0x1F, 0x00, 0x00],
               [0x00, 0x3F, 0x40, 0x38, 0x40, 0x3F, 0x00, 0x00],
               [0x00, 0x63, 0x14, 0x08, 0x14, 0x63, 0x00, 0x00],
               [0x00, 0x03, 0x04, 0x78, 0x04, 0x03, 0x00, 0x00],
               [0x00, 0x61, 0x51, 0x49, 0x45, 0x43, 0x00, 0x00],
               [0x00, 0x7F, 0x41, 0x41, 0x00, 0x00, 0x00, 0x00],
               [0x00, 0x02, 0x04, 0x08, 0x10, 0x20, 0x00, 0x00],
               [0x00, 0x41, 0x41, 0x7F, 0x00, 0x00, 0x00, 0x00],
               [0x00, 0x04, 0x02, 0x01, 0x02, 0x04, 0x00, 0x00],
               [0x00, 0x80, 0x80, 0x80, 0x80, 0x80, 0x00, 0x00],
               [0x00, 0x01, 0x02, 0x04, 0x00, 0x00, 0x00, 0x00],
               [0x00, 0x20, 0x54, 0x54, 0x54, 0x78, 0x00, 0x00],
               [0x00, 0x7F, 0x48, 0x44, 0x44, 0x38, 0x00, 0x00],
               [0x00, 0x38, 0x44, 0x44, 0x28, 0x00, 0x00, 0x00],
               [0x00, 0x38, 0x44, 0x44, 0x48, 0x7F, 0x00, 0x00],
               [0x00, 0x38, 0x54, 0x54, 0x54, 0x18, 0x00, 0x00],
               [0x00, 0x08, 0x7E, 0x09, 0x02, 0x00, 0x00, 0x00],
               [0x00, 0x18, 0xA4, 0xA4, 0xA4, 0x7C, 0x00, 0x00],
               [0x00, 0x7F, 0x08, 0x04, 0x04, 0x78, 0x00, 0x00],
               [0x00, 0x00, 0x7D, 0x00, 0x00, 0x00, 0x00, 0x00],
               [0x00, 0x80, 0x84, 0x7D, 0x00, 0x00, 0x00, 0x00],
               [0x00, 0x7F, 0x10, 0x28, 0x44, 0x00, 0x00, 0x00],
               [0x00, 0x41, 0x7F, 0x40, 0x00, 0x00, 0x00, 0x00],
               [0x00, 0x7C, 0x04, 0x18, 0x04, 0x78, 0x00, 0x00],
               [0x00, 0x7C, 0x08, 0x04, 0x7C, 0x00, 0x00, 0x00],
               [0x00, 0x38, 0x44, 0x44, 0x38, 0x00, 0x00, 0x00],
               [0x00, 0xFC, 0x24, 0x24, 0x18, 0x00, 0x00, 0x00],
               [0x00, 0x18, 0x24, 0x24, 0xFC, 0x00, 0x00, 0x00],
               [0x00, 0x00, 0x7C, 0x08, 0x04, 0x00, 0x00, 0x00],
               [0x00, 0x48, 0x54, 0x54, 0x24, 0x00, 0x00, 0x00],
               [0x00, 0x04, 0x7F, 0x44, 0x00, 0x00, 0x00, 0x00],
               [0x00, 0x3C, 0x40, 0x40, 0x7C, 0x00, 0x00, 0x00],
               [0x00, 0x1C, 0x20, 0x40, 0x20, 0x1C, 0x00, 0x00],
               [0x00, 0x3C, 0x40, 0x30, 0x40, 0x3C, 0x00, 0x00],
               [0x00, 0x44, 0x28, 0x10, 0x28, 0x44, 0x00, 0x00],
               [0x00, 0x1C, 0xA0, 0xA0, 0x7C, 0x00, 0x00, 0x00],
               [0x00, 0x44, 0x64, 0x54, 0x4C, 0x44, 0x00, 0x00],
               [0x00, 0x08, 0x36, 0x41, 0x00, 0x00, 0x00, 0x00],
               [0x00, 0x00, 0x7F, 0x00, 0x00, 0x00, 0x00, 0x00],
               [0x00, 0x41, 0x36, 0x08, 0x00, 0x00, 0x00, 0x00],
               [0x00, 0x02, 0x01, 0x01, 0x02, 0x01, 0x00, 0x00],
               [0x00, 0x02, 0x05, 0x05, 0x02, 0x00, 0x00, 0x00]]
  
  
  class GroveOledDisplay128x64(object):
      HORIZONTAL = 0x00
      VERTICAL = 0x01
      PAGE = 0x02
  
      def __init__(self, bus=None, address=0x3C):
          self.bus = Bus(bus)
          self.address = address
  
          self.off()
          self.inverse = False
          self.mode = self.HORIZONTAL
  
          self.clear()
          self.on()
  
      def on(self):
          self.send_command(_DISPLAY_ON)
  
      def off(self):
          self.send_command(_DISPLAY_OFF)
  
      def send_command(self, command):
          self.bus.write_byte_data(self.address, _COMMAND_MODE, command)
  
      def send_data(self, data):
          self.bus.write_byte_data(self.address, _DATA_MODE, data)
  
      def send_commands(self, commands):
          for c in commands:
              self.send_command(c)
  
      def clear(self):
          self.off()
          for i in range(8):
              self.set_cursor(i, 0)
              self.puts(' ' * 16)
  
          self.on()
          self.set_cursor(0, 0)
  
      @property
      def inverse(self):
          return self._inverse
  
      @inverse.setter
      def inverse(self, enable):
          self.send_command(_INVERSE_DISPLAY if enable else _NORMAL_DISPLAY)
          self._inverse = enable
  
      @property
      def mode(self):
          return self._mode
  
      @mode.setter
      def mode(self, mode):
          self.send_command(0x20)
          self.send_command(mode)
          self._mode = mode
  
      def set_cursor(self, row, column):
          self.send_command(0xB0 + row)
          self.send_command(0x00 + (8*column & 0x0F))
          self.send_command(0x10 + ((8*column>>4)&0x0F))
  
      def putc(self, c):
          C_add = ord(c)
          if C_add < 32 or C_add > 127:     # Ignore non-printable ASCII characters
              c = ' '
              C_add = ord(c)
  
          for i in range(0, 8):
              self.send_data(BasicFont[C_add-32][i])
  
      def puts(self, text):
          for c in text:
              self.putc(c)
  
      def show_image(self, image):
          from PIL import Image
          import numpy as np
          
          im = Image.open(image)
  
          bw = im.convert('1')
          pixels = np.array(bw.getdata())
          page_size = 128 * 8
  
          self.set_cursor(0, 0)
          for page in range(8):
              start = page_size * page
              end = start + page_size
  
              for i in range(start, start + 128):
                  data = np.packbits(pixels[i:end:128][::-1])[0]
                  self.send_data(data)
  
  
  def main():
      display = GroveOledDisplay128x64()
  
      argvs = sys.argv
  
      message =  argvs[1]
  
      print(message)
  
      display.clear()
      display.set_cursor(0, 0)
      display.puts(message)
  
  if __name__ == "__main__":
      main()
  