alba/frontend/lib/waveshare_epd/epd2in9d.py

#!/usr/bin/python
# -*- coding:utf-8 -*-

# *****************************************************************************
# * | File        :   epd2in9d.py
# * | Author      :   Waveshare team
# * | Function    :   Electronic paper driver
# * | Info        :
# *----------------
# * | This version:   V2.0
# * | 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
from PIL import Image
import RPi.GPIO as GPIO

# Display resolution
EPD_WIDTH       = 128
EPD_HEIGHT      = 296

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_vcom1 = [  
        0x00, 0x19, 0x01, 0x00, 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,
    ]

    lut_ww1 = [  
        0x00, 0x19, 0x01, 0x00, 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,
    ]

    lut_bw1 = [  
        0x80, 0x19, 0x01, 0x00, 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,
    ]

    lut_wb1 = [
        0x40, 0x19, 0x01, 0x00, 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,
    ]

    lut_bb1 = [ 
        0x00, 0x19, 0x01, 0x00, 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,
    ]
        
    # Hardware reset
    def reset(self):
        epdconfig.digital_write(self.reset_pin, 1)
        epdconfig.delay_ms(20) 
        epdconfig.digital_write(self.reset_pin, 0)
        epdconfig.delay_ms(5)
        epdconfig.digital_write(self.reset_pin, 1)
        epdconfig.delay_ms(20)   
        epdconfig.digital_write(self.reset_pin, 0)
        epdconfig.delay_ms(5)
        epdconfig.digital_write(self.reset_pin, 1)
        epdconfig.delay_ms(20)  
        epdconfig.digital_write(self.reset_pin, 0)
        epdconfig.delay_ms(5)
        epdconfig.digital_write(self.reset_pin, 1)
        epdconfig.delay_ms(20)  

    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):
        logger.debug("e-Paper busy")
        while(epdconfig.digital_read(self.busy_pin) == 0):      # 0: idle, 1: busy
            self.send_command(0x71)
            epdconfig.delay_ms(10)  
        logger.debug("e-Paper busy release")
        
    def TurnOnDisplay(self):
        self.send_command(0x12)
        epdconfig.delay_ms(10)
        self.ReadBusy()
        
    def init(self):
        if (epdconfig.module_init() != 0):
            return -1
        # EPD hardware init start
        self.reset()
        
        self.send_command(0x04)
        self.ReadBusy() #waiting for the electronic paper IC to release the idle signal

        self.send_command(0x00)     #panel setting
        self.send_data(0x1f)        # LUT from OTP，KW-BF   KWR-AF    BWROTP 0f   BWOTP 1f

        self.send_command(0x61)     #resolution setting
        self.send_data (0x80)       
        self.send_data (0x01)   
        self.send_data (0x28)   

        self.send_command(0X50) #VCOM AND DATA INTERVAL SETTING     
        self.send_data(0x97)        #WBmode:VBDF 17|D7 VBDW 97 VBDB 57  WBRmode:VBDF F7 VBDW 77 VBDB 37  VBDR B7

        return 0
    
    def SetPartReg(self):

        self.send_command(0x01) #POWER SETTING
        self.send_data(0x03)
        self.send_data(0x00)
        self.send_data(0x2b)
        self.send_data(0x2b)
        self.send_data(0x03)

        self.send_command(0x06) #boost 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(0xbf)     #LUT from OTP，128x296

        self.send_command(0x30) #PLL setting
        self.send_data(0x3a)     # 3a 100HZ   29 150Hz 39 200HZ 31 171HZ

        self.send_command(0x61) #resolution setting
        self.send_data(self.width)
        self.send_data((self.height >> 8) & 0xff)
        self.send_data(self.height & 0xff)

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

        self.send_command(0X50)
        self.send_data(0x97)
        
        self.send_command(0x20)         # vcom
        for count in range(0, 44):
            self.send_data(self.lut_vcom1[count])
        self.send_command(0x21)         # ww --
        for count in range(0, 42):
            self.send_data(self.lut_ww1[count])
        self.send_command(0x22)         # bw r
        for count in range(0, 42):
            self.send_data(self.lut_bw1[count])
        self.send_command(0x23)         # wb w
        for count in range(0, 42):
            self.send_data(self.lut_wb1[count])
        self.send_command(0x24)         # bb b
        for count in range(0, 42):
            self.send_data(self.lut_bb1[count])

    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("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):
            logger.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):
        self.send_command(0x10)
        for i in range(0, int(self.width * self.height / 8)):
            self.send_data(0x00)
        epdconfig.delay_ms(10)
        
        self.send_command(0x13)
        for i in range(0, int(self.width * self.height / 8)):
            self.send_data(image[i])
        epdconfig.delay_ms(10)
        
        self.TurnOnDisplay()
        
    def DisplayPartial(self, image):
        self.SetPartReg()
        self.send_command(0x91)
        self.send_command(0x90)
        self.send_data(0)
        self.send_data(self.width - 1)

        self.send_data(0)
        self.send_data(0)
        self.send_data(int(self.height / 256))
        self.send_data(self.height % 256 - 1)
        self.send_data(0x28)
            
        self.send_command(0x10)
        for i in range(0, int(self.width * self.height / 8)):
            self.send_data(image[i])
        epdconfig.delay_ms(10)
        
        self.send_command(0x13)
        for i in range(0, int(self.width * self.height / 8)):
            self.send_data(~image[i])
        epdconfig.delay_ms(10)
          
        self.TurnOnDisplay()
        
    def Clear(self, color):
        self.send_command(0x10)
        for i in range(0, int(self.width * self.height / 8)):
            self.send_data(0x00)
        epdconfig.delay_ms(10)
        
        self.send_command(0x13)
        for i in range(0, int(self.width * self.height / 8)):
            self.send_data(0xFF)
        epdconfig.delay_ms(10)
        
        self.TurnOnDisplay()

    def sleep(self):
        self.send_command(0X50)
        self.send_data(0xf7)
        self.send_command(0X02)         #power off
        self.send_command(0X07)         #deep sleep  
        self.send_data(0xA5)
        
        epdconfig.delay_ms(2000)
        epdconfig.module_exit()

### END OF FILE ###