wavesharelib/RaspberryPi_JetsonNano/python/lib/waveshare_epd/epd4in2.py

# *****************************************************************************
# * | File        :   epd4in2.py
# * | Author      :   Waveshare team
# * | Function    :   Electronic paper driver
# * | Info        :
# *----------------
# * | This version:   V4.1
# * | 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
from PIL import Image
import RPi.GPIO as GPIO

# Display resolution
EPD_WIDTH       = 400
EPD_HEIGHT      = 300

GRAY1  = 0xff #white
GRAY2  = 0xC0
GRAY3  = 0x80 #gray
GRAY4  = 0x00 #Blackest

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
        self.GRAY1  = GRAY1 #white
        self.GRAY2  = GRAY2
        self.GRAY3  = GRAY3 #gray
        self.GRAY4  = GRAY4 #Blackest
        self.DATA   = [0x00] * 15000

    lut_vcom0 = [
    0x00, 0x08, 0x08, 0x00, 0x00, 0x02, 
    0x00, 0x0F, 0x0F, 0x00, 0x00, 0x01, 
    0x00, 0x08, 0x08, 0x00, 0x00, 0x02, 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 
    ]
    lut_ww = [
    0x50, 0x08, 0x08, 0x00, 0x00, 0x02, 
    0x90, 0x0F, 0x0F, 0x00, 0x00, 0x01, 
    0xA0, 0x08, 0x08, 0x00, 0x00, 0x02, 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    ]
    lut_bw = [
    0x50, 0x08, 0x08, 0x00, 0x00, 0x02, 
    0x90, 0x0F, 0x0F, 0x00, 0x00, 0x01, 
    0xA0, 0x08, 0x08, 0x00, 0x00, 0x02, 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    ]
    lut_wb = [
    0xA0, 0x08, 0x08, 0x00, 0x00, 0x02, 
    0x90, 0x0F, 0x0F, 0x00, 0x00, 0x01, 
    0x50, 0x08, 0x08, 0x00, 0x00, 0x02, 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    ]
    lut_bb = [
    0x20, 0x08, 0x08, 0x00, 0x00, 0x02, 
    0x90, 0x0F, 0x0F, 0x00, 0x00, 0x01, 
    0x10, 0x08, 0x08, 0x00, 0x00, 0x02, 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    ]
    #******************************partial screen update LUT*********************************/
    EPD_4IN2_Partial_lut_vcom1 =[
    0x00, 0x01, 0x20, 0x01, 0x00, 0x01, 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    ]

    EPD_4IN2_Partial_lut_ww1 =[
    0x00, 0x01, 0x20, 0x01, 0x00, 0x01, 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    ]

    EPD_4IN2_Partial_lut_bw1 =[
    0x20, 0x01, 0x20, 0x01, 0x00, 0x01, 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
    ]

    EPD_4IN2_Partial_lut_wb1 =[
    0x10, 0x01, 0x20, 0x01, 0x00, 0x01, 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
    ]

    EPD_4IN2_Partial_lut_bb1 =[
    0x00, 0x01,0x20, 0x01, 0x00, 0x01, 
    0x00, 0x00,0x00, 0x00, 0x00, 0x00, 
    0x00, 0x00,0x00, 0x00, 0x00, 0x00, 
    0x00, 0x00,0x00, 0x00, 0x00, 0x00, 
    0x00, 0x00,0x00, 0x00, 0x00, 0x00, 
    0x00, 0x00,0x00, 0x00, 0x00, 0x00,
    0x00, 0x00,0x00, 0x00, 0x00, 0x00, 
    ]

    #******************************gray*********************************/
    #0~3 gray
    EPD_4IN2_4Gray_lut_vcom =[
    0x00 ,0x0A ,0x00 ,0x00 ,0x00 ,0x01,
    0x60 ,0x14 ,0x14 ,0x00 ,0x00 ,0x01,
    0x00 ,0x14 ,0x00 ,0x00 ,0x00 ,0x01,
    0x00 ,0x13 ,0x0A ,0x01 ,0x00 ,0x01,
    0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00,
    0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00,
    0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00
    ]
    #R21
    EPD_4IN2_4Gray_lut_ww =[
    0x40 ,0x0A ,0x00 ,0x00 ,0x00 ,0x01,
    0x90 ,0x14 ,0x14 ,0x00 ,0x00 ,0x01,
    0x10 ,0x14 ,0x0A ,0x00 ,0x00 ,0x01,
    0xA0 ,0x13 ,0x01 ,0x00 ,0x00 ,0x01,
    0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00,
    0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00,
    0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00,
    ]
    #R22H r
    EPD_4IN2_4Gray_lut_bw =[
    0x40 ,0x0A ,0x00 ,0x00 ,0x00 ,0x01,
    0x90 ,0x14 ,0x14 ,0x00 ,0x00 ,0x01,
    0x00 ,0x14 ,0x0A ,0x00 ,0x00 ,0x01,
    0x99 ,0x0C ,0x01 ,0x03 ,0x04 ,0x01,
    0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00,
    0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00,
    0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00,
    ]
    #R23H w
    EPD_4IN2_4Gray_lut_wb =[
    0x40 ,0x0A ,0x00 ,0x00 ,0x00 ,0x01,
    0x90 ,0x14 ,0x14 ,0x00 ,0x00 ,0x01,
    0x00 ,0x14 ,0x0A ,0x00 ,0x00 ,0x01,
    0x99 ,0x0B ,0x04 ,0x04 ,0x01 ,0x01,
    0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00,
    0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00,
    0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00,
    ]
    #R24H b
    EPD_4IN2_4Gray_lut_bb =[
    0x80 ,0x0A ,0x00 ,0x00 ,0x00 ,0x01,
    0x90 ,0x14 ,0x14 ,0x00 ,0x00 ,0x01,
    0x20 ,0x14 ,0x0A ,0x00 ,0x00 ,0x01,
    0x50 ,0x13 ,0x01 ,0x00 ,0x00 ,0x01,
    0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00,
    0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00,
    0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00,
    ]
    
    # Hardware reset
    def reset(self):
        epdconfig.digital_write(self.reset_pin, 1)
        epdconfig.delay_ms(10) 
        epdconfig.digital_write(self.reset_pin, 0)
        epdconfig.delay_ms(10)
        epdconfig.digital_write(self.reset_pin, 1)
        epdconfig.delay_ms(10)   
        epdconfig.digital_write(self.reset_pin, 0)
        epdconfig.delay_ms(10)
        epdconfig.digital_write(self.reset_pin, 1)
        epdconfig.delay_ms(10)   
        epdconfig.digital_write(self.reset_pin, 0)
        epdconfig.delay_ms(10)
        epdconfig.digital_write(self.reset_pin, 1)
        epdconfig.delay_ms(10)

    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)

    # 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)
        
    def ReadBusy(self):
        self.send_command(0x71)
        while(epdconfig.digital_read(self.busy_pin) == 0):      # 0: idle, 1: busy
            self.send_command(0x71)
            epdconfig.delay_ms(100)    

    def set_lut(self):
        self.send_command(0x20)               # vcom
        self.send_data2(self.lut_vcom0)
            
        self.send_command(0x21)         # ww --
        self.send_data2(self.lut_ww)
            
        self.send_command(0x22)         # bw r
        self.send_data2(self.lut_bw)
            
        self.send_command(0x23)         # wb w
        self.send_data2(self.lut_bb)
            
        self.send_command(0x24)         # bb b
        self.send_data2(self.lut_wb)


    def Partial_SetLut(self):
        self.send_command(0x20)
        self.send_data2(self.EPD_4IN2_Partial_lut_vcom1)

        self.send_command(0x21)
        self.send_data2(self.EPD_4IN2_Partial_lut_ww1)
        
        self.send_command(0x22)
        self.send_data2(self.EPD_4IN2_Partial_lut_bw1)

        self.send_command(0x23)
        self.send_data2(self.EPD_4IN2_Partial_lut_wb1)

        self.send_command(0x24)
        self.send_data2(self.EPD_4IN2_Partial_lut_bb1)


       
    def Gray_SetLut(self):
        self.send_command(0x20)      #vcom
        self.send_data2(self.EPD_4IN2_4Gray_lut_vcom) 

        self.send_command(0x21)      #red not use
        self.send_data2(self.EPD_4IN2_4Gray_lut_ww) 

        self.send_command(0x22)       #bw r
        self.send_data2(self.EPD_4IN2_4Gray_lut_bw) 

        self.send_command(0x23)       #wb w
        self.send_data2(self.EPD_4IN2_4Gray_lut_wb) 

        self.send_command(0x24)                          #bb b
        self.send_data2(self.EPD_4IN2_4Gray_lut_bb) 

        self.send_command(0x25)      #vcom
        self.send_data2(self.EPD_4IN2_4Gray_lut_ww)
      
    
    def init(self):
        if (epdconfig.module_init() != 0):
            return -1
        # EPD hardware init start
        self.reset()
        
        self.send_command(0x01) # POWER SETTING
        self.send_data(0x03) # VDS_EN, VDG_EN
        self.send_data(0x00) # VCOM_HV, VGHL_LV[1], VGHL_LV[0]
        self.send_data(0x2b) # VDH
        self.send_data(0x2b) # VDL
        
        self.send_command(0x06) # boost soft start
        self.send_data(0x17)
        self.send_data(0x17)
        self.send_data(0x17)
        
        self.send_command(0x04) # POWER_ON
        self.ReadBusy()
        
        self.send_command(0x00) # panel setting
        self.send_data(0xbf) # KW-BF   KWR-AF  BWROTP 0f
        
        self.send_command(0x30) # PLL setting
        self.send_data(0x3c) # 3A 100HZ   29 150Hz 39 200HZ  31 171HZ

        self.send_command(0x61) # resolution setting
        self.send_data(0x01)
        self.send_data(0x90) # 128
        self.send_data(0x01)  
        self.send_data(0x2c)

        self.send_command(0x82) # vcom_DC setting
        self.send_data(0x12)

        self.send_command(0X50) # VCOM AND DATA INTERVAL SETTING
        self.send_data(0x97) # 97white border 77black border  VBDF 17|D7 VBDW 97 VBDB 57  VBDF F7 VBDW 77 VBDB 37  VBDR B7
    
        self.set_lut()
        # EPD hardware init end
        return 0
        
    def init_Partial(self):
        if (epdconfig.module_init() != 0):
            return -1
        # EPD hardware init start
        self.reset()
        
        self.send_command(0x01) # POWER SETTING
        self.send_data(0x03) # VDS_EN, VDG_EN
        self.send_data(0x00) # VCOM_HV, VGHL_LV[1], VGHL_LV[0]
        self.send_data(0x2b) # VDH
        self.send_data(0x2b) # VDL
        
        self.send_command(0x06) # boost soft start
        self.send_data(0x17)
        self.send_data(0x17)
        self.send_data(0x17)
        
        self.send_command(0x04) # POWER_ON
        self.ReadBusy()
        
        self.send_command(0x00) # panel setting
        self.send_data(0xbf) # KW-BF   KWR-AF  BWROTP 0f
        
        self.send_command(0x30) # PLL setting
        self.send_data(0x3c) # 3A 100HZ   29 150Hz 39 200HZ  31 171HZ

        self.send_command(0x61) # resolution setting
        self.send_data(0x01)
        self.send_data(0x90) # 128
        self.send_data(0x01)  
        self.send_data(0x2c)

        self.send_command(0x82) # vcom_DC setting
        self.send_data(0x12)

        self.send_command(0X50) # VCOM AND DATA INTERVAL SETTING
        self.send_data(0x07) # 97white border 77black border  VBDF 17|D7 VBDW 97 VBDB 57  VBDF F7 VBDW 77 VBDB 37  VBDR B7
    
        self.Partial_SetLut();
        # EPD hardware init end
        return 0
        
    def Init_4Gray(self):
        if (epdconfig.module_init() != 0):
            return -1
        # EPD hardware init start
        self.reset()
        
        self.send_command(0x01)   #POWER SETTING
        self.send_data (0x03)
        self.send_data (0x00)       #VGH=20V,VGL=-20V
        self.send_data (0x2b)  #VDH=15V                
        self.send_data (0x2b)  #VDL=-15V
        self.send_data (0x13)

        self.send_command(0x06)         #booster soft start
        self.send_data (0x17)  #A
        self.send_data (0x17)  #B
        self.send_data (0x17)  #C 

        self.send_command(0x04)
        self.ReadBusy()

        self.send_command(0x00)   #panel setting
        self.send_data(0x3f)  #KW-3f   KWR-2F BWROTP 0f BWOTP 1f

        self.send_command(0x30)   #PLL setting
        self.send_data (0x3c)       #100hz 

        self.send_command(0x61)   #resolution setting
        self.send_data (0x01)  #400
        self.send_data (0x90)       
        self.send_data (0x01)  #300
        self.send_data (0x2c)

        self.send_command(0x82)   #vcom_DC setting
        self.send_data (0x12)

        self.send_command(0X50)   #VCOM AND DATA INTERVAL SETTING   
        self.send_data(0x97)

    def getbuffer(self, image):
        # logger.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()
        # logger.debug("imwidth = %d, imheight = %d",imwidth,imheight)
        if(imwidth == self.width and imheight == self.height):
            logger.debug("Horizontal")
            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):
            logger.debug("Vertical")
            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 getbuffer_4Gray(self, image):
        # logger.debug("bufsiz = ",int(self.width/8) * self.height)
        buf = [0xFF] * (int(self.width / 4) * self.height)
        image_monocolor = image.convert('L')
        imwidth, imheight = image_monocolor.size
        pixels = image_monocolor.load()
        i=0
        # logger.debug("imwidth = %d, imheight = %d",imwidth,imheight)
        if(imwidth == self.width and imheight == self.height):
            logger.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] == 0xC0):
                        pixels[x, y] = 0x80
                    elif (pixels[x, y] == 0x80):
                        pixels[x, y] = 0x40
                    i= i+1
                    if(i%4 == 0):
                        buf[int((x + (y * self.width))/4)] = ((pixels[x-3, y]&0xc0) | (pixels[x-2, y]&0xc0)>>2 | (pixels[x-1, y]&0xc0)>>4 | (pixels[x, y]&0xc0)>>6)
                        
        elif(imwidth == self.height and imheight == self.width):
            logger.debug("Horizontal")
            for x in range(imwidth):
                for y in range(imheight):
                    newx = y
                    newy = x
                    if(pixels[x, y] == 0xC0):
                        pixels[x, y] = 0x80
                    elif (pixels[x, y] == 0x80):
                        pixels[x, y] = 0x40
                    i= i+1
                    if(i%4 == 0):
                        buf[int((newx + (newy * self.width))/4)] = ((pixels[x, y-3]&0xc0) | (pixels[x, y-2]&0xc0)>>2 | (pixels[x, y-1]&0xc0)>>4 | (pixels[x, y]&0xc0)>>6) 
        
        return buf

    def display(self, image):
        if self.width%8 == 0:
            linewidth = int(self.width/8)
        else:
            linewidth = int(self.width/8) + 1

        self.send_command(0x92); 
        self.set_lut()
        self.send_command(0x10)
        self.send_data2([0xFF] * int(self.width * linewidth))
            
        self.send_command(0x13)
        self.send_data2(image)
            
        self.send_command(0x12) 
        self.ReadBusy()

    def EPD_4IN2_PartialDisplay(self, X_start, Y_start, X_end, Y_end, Image):
        # EPD_WIDTH       = 400
        # EPD_HEIGHT      = 300

        if(EPD_WIDTH % 8 != 0):
           Width = int(EPD_WIDTH / 8) + 1
        else:
            Width = int(EPD_WIDTH / 8)
        Height = EPD_HEIGHT
        
        if(X_start % 8 != 0):
            X_start = int(X_start/8) + 1
        else:
            X_start = int(X_start/8)
        if(X_end % 8 != 0):
            X_end = int(X_end/8) + 1
        else:
            X_end = int(X_end/8)
        
        buf = [0x00] * (Y_end - Y_start) * (X_end - X_start)

        
        self.send_command(0x91)  #This command makes the display enter partial mode
        self.send_command(0x90)  #resolution setting
        self.send_data (int(X_start*8/256))
        self.send_data (int(X_start*8%256))   #x-start    
        
        self.send_data (int(X_end*8 /256))
        self.send_data (int(X_end*8 %256)-1)  #x-end

        self.send_data (int(Y_start/256))
        self.send_data (int(Y_start%256))   #y-start    
        

        self.send_data (int(Y_end/256)) 
        self.send_data (int(Y_end%256)-1)  #y-end
        self.send_data (0x28)
         

        self.send_command(0x10);        #writes Old data to SRAM for programming
        for j in range(0, Y_end - Y_start):
            for i in range(0, X_end - X_start):
                buf[j * (X_end - X_start) + i] = self.DATA[(Y_start + j)*Width + X_start + i]
        self.send_data2(buf)
            
        self.send_command(0x13);     #writes New data to SRAM.
        for j in range(0, Y_end - Y_start):
            for i in range(0, X_end - X_start):
                buf[j * (X_end - X_start) + i] = ~Image[(Y_start + j)*Width + X_start + i]
                self.DATA[(Y_start + j)*Width + X_start + i] = ~Image[(Y_start + j)*Width + X_start/8 + i]
        self.send_data2(buf)
            
        self.send_command(0x12)   #DISPLAY REFRESH                
        epdconfig.delay_ms(200)    #The delay here is necessary, 200uS at least!!!     
        self.ReadBusy()


    def display_4Gray(self, image):
        self.send_command(0x92); 
        self.set_lut()
        self.send_command(0x10)

        if self.width%8 == 0:
            linewidth = int(self.width/8)
        else:
            linewidth = int(self.width/8) + 1

        buf = [0x00] * self.height * linewidth

        for i in range(0, int(EPD_WIDTH * EPD_HEIGHT / 8)):                   # EPD_WIDTH * EPD_HEIGHT / 4
            temp3=0
            for j in range(0, 2):
                temp1 = image[i*2+j]
                for k in range(0, 2):
                    temp2 = temp1&0xC0 
                    if(temp2 == 0xC0):
                        temp3 |= 0x01#white
                    elif(temp2 == 0x00):
                        temp3 |= 0x00  #black
                    elif(temp2 == 0x80): 
                        temp3 |= 0x01  #gray1
                    else: #0x40
                        temp3 |= 0x00 #gray2
                    temp3 <<= 1 
                    
                    temp1 <<= 2
                    temp2 = temp1&0xC0 
                    if(temp2 == 0xC0):  #white
                        temp3 |= 0x01
                    elif(temp2 == 0x00): #black
                        temp3 |= 0x00
                    elif(temp2 == 0x80):
                        temp3 |= 0x01 #gray1
                    else :   #0x40
                            temp3 |= 0x00 #gray2 
                    if(j!=1 or k!=1):    
                        temp3 <<= 1
                    temp1 <<= 2
            buf[i] = temp3
        self.send_data2(buf)
            
        self.send_command(0x13)     
               
        for i in range(0, int(EPD_WIDTH * EPD_HEIGHT / 8)):                #5808*4  46464
            temp3=0
            for j in range(0, 2):
                temp1 = image[i*2+j]
                for k in range(0, 2):
                    temp2 = temp1&0xC0 
                    if(temp2 == 0xC0):
                        temp3 |= 0x01#white
                    elif(temp2 == 0x00):
                        temp3 |= 0x00  #black
                    elif(temp2 == 0x80):
                        temp3 |= 0x00  #gray1
                    else: #0x40
                        temp3 |= 0x01 #gray2
                    temp3 <<= 1 
                    
                    temp1 <<= 2
                    temp2 = temp1&0xC0 
                    if(temp2 == 0xC0):  #white
                        temp3 |= 0x01
                    elif(temp2 == 0x00): #black
                        temp3 |= 0x00
                    elif(temp2 == 0x80):
                        temp3 |= 0x00 #gray1
                    else:    #0x40
                        temp3 |= 0x01 #gray2
                    if(j!=1 or k!=1):     
                        temp3 <<= 1
                    temp1 <<= 2
            buf[i] = temp3
        self.send_data2(buf)
        
        self.Gray_SetLut()
        self.send_command(0x12)
        epdconfig.delay_ms(200)
        self.ReadBusy()
        # pass
    
    def Clear(self):
        if self.width%8 == 0:
            linewidth = int(self.width/8)
        else:
            linewidth = int(self.width/8) + 1

        self.send_command(0x10)
        self.send_data2([0xff] * int(self.height * linewidth)) 
            
        self.send_command(0x13)
        self.send_data2([0xff] * int(self.height * linewidth)) 
            
        self.send_command(0x12) 
        self.ReadBusy()

    def sleep(self):
        self.send_command(0x02) # POWER_OFF
        self.ReadBusy()
        self.send_command(0x07) # DEEP_SLEEP
        self.send_data(0XA5)
        
        epdconfig.delay_ms(2000)
        epdconfig.module_exit()
        
### END OF FILE ###