alba/frontend/lib/waveshare_epd/epd4in01f.py

#!/usr/bin/python
# -*- coding:utf-8 -*-
# *****************************************************************************
# * | File        :	  epd4in01f.py
# * | Author      :   Waveshare team
# * | Function    :   Electronic paper driver
# * | Info        :
# *----------------
# * | This version:   V1.0
# * | Date        :   2020-11-06
# # | 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       = 640
EPD_HEIGHT      = 400

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.BLACK  = 0x000000   #   0000  BGR
        self.WHITE  = 0xffffff   #   0001
        self.GREEN  = 0x00ff00   #   0010
        self.BLUE   = 0xff0000   #   0011
        self.RED    = 0x0000ff   #   0100
        self.YELLOW = 0x00ffff   #   0101
        self.ORANGE = 0x0080ff   #   0110
        
        
    # 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(1)
        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 ReadBusyHigh(self):
        logger.debug("e-Paper busy")
        while(epdconfig.digital_read(self.busy_pin) == 0):      # 0: idle, 1: busy
            epdconfig.delay_ms(10)
        logger.debug("e-Paper busy release")
        
    def ReadBusyLow(self):
        logger.debug("e-Paper busy")
        while(epdconfig.digital_read(self.busy_pin) == 1):      # 0: idle, 1: busy
            epdconfig.delay_ms(10)    
        logger.debug("e-Paper busy release")
        
    def init(self):
        if (epdconfig.module_init() != 0):
            return -1
        # EPD hardware init start
        self.reset()
        
        self.ReadBusyHigh()
        self.send_command(0x00);
        self.send_data(0x2f);
        self.send_data(0x00);
        self.send_command(0x01);
        self.send_data(0x37);
        self.send_data(0x00);
        self.send_data(0x05);
        self.send_data(0x05);
        self.send_command(0x03);
        self.send_data(0x00);
        self.send_command(0x06);
        self.send_data(0xC7);
        self.send_data(0xC7);
        self.send_data(0x1D);
        self.send_command(0x41);
        self.send_data(0x00);
        self.send_command(0x50);
        self.send_data(0x37);
        self.send_command(0x60);
        self.send_data(0x22);
        self.send_command(0x61);
        self.send_data(0x02);
        self.send_data(0x80);
        self.send_data(0x01);
        self.send_data(0x90);
        self.send_command(0xE3);
        self.send_data(0xAA);
        
        # EPD hardware init end
        return 0

    def getbuffer(self, image):
        buf = [0x00] * int(self.width * self.height / 2)
        image_monocolor = image.convert('RGB')#Picture mode conversion
        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):
            for y in range(imheight):
                for x in range(imwidth):
                    # Set the bits for the column of pixels at the current position.
                    Add = int((x + y * self.width) / 2)
                    Color = 0;
                    if (pixels[x, y][0] == 0 and  pixels[x, y][1] == 0 and pixels[x, y][2] == 0):
                        Color = 0
                    elif (pixels[x, y][0] == 255 and  pixels[x, y][1] == 255 and pixels[x, y][2] == 255):
                        Color = 1
                    elif (pixels[x, y][0] == 0 and  pixels[x, y][1] == 255 and pixels[x, y][2] == 0):
                        Color = 2
                    elif (pixels[x, y][0] == 0 and  pixels[x, y][1] == 0 and pixels[x, y][2] == 255):
                        Color = 3
                    elif (pixels[x, y][0] == 255 and  pixels[x, y][1] == 0 and pixels[x, y][2] == 0):
                        Color = 4
                    elif (pixels[x, y][0] == 255 and  pixels[x, y][1] == 255 and pixels[x, y][2] == 0):
                        Color = 5
                    elif (pixels[x, y][0] == 255 and  pixels[x, y][1] == 128 and pixels[x, y][2] == 0):
                        Color = 6
                    
                    data_t = buf[Add]&(~(0xF0 >> ((x % 2)*4)))
                    buf[Add] = data_t | ((Color << 4) >> ((x % 2)*4));
                        
        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   
                    Add = int((newx + newy*self.width) / 2)
                    Color = 0;
                    if (pixels[x, y][0] == 0 and  pixels[x, y][1] == 0 and pixels[x, y][2] == 0):
                        Color = 0
                    elif (pixels[x, y][0] == 255 and  pixels[x, y][1] == 255 and pixels[x, y][2] == 255):
                        Color = 1
                    elif (pixels[x, y][0] == 0 and  pixels[x, y][1] == 255 and pixels[x, y][2] == 0):
                        Color = 2
                    elif (pixels[x, y][0] == 0 and  pixels[x, y][1] == 0 and pixels[x, y][2] == 255):
                        Color = 3
                    elif (pixels[x, y][0] == 255 and  pixels[x, y][1] == 0 and pixels[x, y][2] == 0):
                        Color = 4
                    elif (pixels[x, y][0] == 255 and  pixels[x, y][1] == 255 and pixels[x, y][2] == 0):
                        Color = 5
                    elif (pixels[x, y][0] == 255 and  pixels[x, y][1] == 128 and pixels[x, y][2] == 0):
                        Color = 6
                    
                    data_t = buf[Add]&(~(0xF0 >> ((newx % 2)*4)))
                    buf[Add] = data_t | ((Color << 4) >> ((newx % 2)*4));
        return buf

    def display(self,image):
        self.send_command(0x61)#Set Resolution setting
        self.send_data(0x02)
        self.send_data(0x80)
        self.send_data(0x01)
        self.send_data(0x90)
        self.send_command(0x10)
        for i in range(0, int(EPD_HEIGHT)):
            for j in range(0, int(EPD_WIDTH/2)):
                self.send_data((image[j+(int(EPD_WIDTH/2)*i)]))
        self.send_command(0x04)#0x04
        self.ReadBusyHigh()
        self.send_command(0x12)#0x12
        self.ReadBusyHigh()
        self.send_command(0x02)  #0x02
        self.ReadBusyLow()
        # epdconfig.delay_ms(500)
        
    def Clear(self):
        self.send_command(0x61)#Set Resolution setting
        self.send_data(0x02)
        self.send_data(0x80)
        self.send_data(0x01)
        self.send_data(0x90)
        self.send_command(0x10)
        for i in range(0, int(EPD_HEIGHT)):
            for j in range(0, int(EPD_WIDTH/2)):
                self.send_data(0x11)
        #BLACK   0x00    /// 0000
        #WHITE   0x11    /// 0001
        #GREEN   0x22    /// 0010
        #BLUE    0x33    /// 0011
        #RED     0x44    /// 0100
        #YELLOW  0x55    /// 0101
        #ORANGE  0x66    /// 0110
        #CLEAN   0x77    /// 0111   unavailable  Afterimage
        self.send_command(0x04)#0x04
        self.ReadBusyHigh()
        self.send_command(0x12)#0x12
        self.ReadBusyHigh()
        self.send_command(0x02)  #0x02
        self.ReadBusyLow()
        # epdconfig.delay_ms(500)

    def sleep(self):
        # epdconfig.delay_ms(500)
        self.send_command(0x07) # DEEP_SLEEP
        self.send_data(0XA5)

        epdconfig.delay_ms(2000)
        epdconfig.module_exit()