228 lines
8.0 KiB
Python
228 lines
8.0 KiB
Python
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# *****************************************************************************
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# * | File : epd2in13.py
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# * | Author : Waveshare team
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# * | Function : Electronic paper driver
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# * | Info :
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# *----------------
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# * | This version: V4.0
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# * | Date : 2019-06-20
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# # | Info : python demo
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# -----------------------------------------------------------------------------
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documnetation files (the "Software"), to deal
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# in the Software without restriction, including without limitation the rights
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# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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# copies of the Software, and to permit persons to whom the Software is
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# furished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in
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# all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS OR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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# THE SOFTWARE.
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#
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import logging
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from . import epdconfig
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# Display resolution
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EPD_WIDTH = 122
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EPD_HEIGHT = 250
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logger = logging.getLogger(__name__)
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class EPD:
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def __init__(self):
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self.reset_pin = epdconfig.RST_PIN
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self.dc_pin = epdconfig.DC_PIN
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self.busy_pin = epdconfig.BUSY_PIN
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self.cs_pin = epdconfig.CS_PIN
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self.width = EPD_WIDTH
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self.height = EPD_HEIGHT
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lut_full_update = [
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0x22, 0x55, 0xAA, 0x55, 0xAA, 0x55, 0xAA, 0x11,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x1E, 0x1E, 0x1E, 0x1E, 0x1E, 0x1E, 0x1E, 0x1E,
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0x01, 0x00, 0x00, 0x00, 0x00, 0x00
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]
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lut_partial_update = [
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0x18, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x0F, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00
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]
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# Hardware reset
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def reset(self):
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epdconfig.digital_write(self.reset_pin, 1)
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epdconfig.delay_ms(200)
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epdconfig.digital_write(self.reset_pin, 0)
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epdconfig.delay_ms(5)
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epdconfig.digital_write(self.reset_pin, 1)
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epdconfig.delay_ms(200)
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def send_command(self, command):
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epdconfig.digital_write(self.dc_pin, 0)
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epdconfig.digital_write(self.cs_pin, 0)
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epdconfig.spi_writebyte([command])
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epdconfig.digital_write(self.cs_pin, 1)
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def send_data(self, data):
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epdconfig.digital_write(self.dc_pin, 1)
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epdconfig.digital_write(self.cs_pin, 0)
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epdconfig.spi_writebyte([data])
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epdconfig.digital_write(self.cs_pin, 1)
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def ReadBusy(self):
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while(epdconfig.digital_read(self.busy_pin) == 1): # 0: idle, 1: busy
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epdconfig.delay_ms(100)
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def TurnOnDisplay(self):
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self.send_command(0x22) # DISPLAY_UPDATE_CONTROL_2
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self.send_data(0xC4)
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self.send_command(0x20) # MASTER_ACTIVATION
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self.send_command(0xFF) # TERMINATE_FRAME_READ_WRITE
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logger.debug("e-Paper busy")
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self.ReadBusy()
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logger.debug("e-Paper busy release")
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def init(self, lut):
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if (epdconfig.module_init() != 0):
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return -1
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# EPD hardware init start
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self.reset()
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self.send_command(0x01) # DRIVER_OUTPUT_CONTROL
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self.send_data((EPD_HEIGHT - 1) & 0xFF)
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self.send_data(((EPD_HEIGHT - 1) >> 8) & 0xFF)
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self.send_data(0x00) # GD = 0 SM = 0 TB = 0
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self.send_command(0x0C) # BOOSTER_SOFT_START_CONTROL
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self.send_data(0xD7)
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self.send_data(0xD6)
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self.send_data(0x9D)
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self.send_command(0x2C) # WRITE_VCOM_REGISTER
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self.send_data(0xA8) # VCOM 7C
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self.send_command(0x3A) # SET_DUMMY_LINE_PERIOD
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self.send_data(0x1A) # 4 dummy lines per gate
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self.send_command(0x3B) # SET_GATE_TIME
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self.send_data(0x08) # 2us per line
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self.send_command(0X3C) # BORDER_WAVEFORM_CONTROL
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self.send_data(0x03)
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self.send_command(0X11) # DATA_ENTRY_MODE_SETTING
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self.send_data(0x03) # X increment; Y increment
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# WRITE_LUT_REGISTER
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self.send_command(0x32)
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for count in range(30):
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self.send_data(lut[count])
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return 0
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##
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# @brief: specify the memory area for data R/W
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##
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def SetWindows(self, x_start, y_start, x_end, y_end):
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self.send_command(0x44) # SET_RAM_X_ADDRESS_START_END_POSITION
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self.send_data((x_start >> 3) & 0xFF)
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self.send_data((x_end >> 3) & 0xFF)
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self.send_command(0x45) # SET_RAM_Y_ADDRESS_START_END_POSITION
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self.send_data(y_start & 0xFF)
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self.send_data((y_start >> 8) & 0xFF)
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self.send_data(y_end & 0xFF)
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self.send_data((y_end >> 8) & 0xFF)
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##
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# @brief: specify the start point for data R/W
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##
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def SetCursor(self, x, y):
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self.send_command(0x4E) # SET_RAM_X_ADDRESS_COUNTER
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# x point must be the multiple of 8 or the last 3 bits will be ignored
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self.send_data((x >> 3) & 0xFF)
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self.send_command(0x4F) # SET_RAM_Y_ADDRESS_COUNTER
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self.send_data(y & 0xFF)
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self.send_data((y >> 8) & 0xFF)
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self.ReadBusy()
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def getbuffer(self, image):
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if self.width%8 == 0:
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linewidth = int(self.width/8)
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else:
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linewidth = int(self.width/8) + 1
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buf = [0xFF] * (linewidth * self.height)
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image_monocolor = image.convert('1')
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imwidth, imheight = image_monocolor.size
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pixels = image_monocolor.load()
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if(imwidth == self.width and imheight == self.height):
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logger.debug("Vertical")
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for y in range(imheight):
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for x in range(imwidth):
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if pixels[x, y] == 0:
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# x = imwidth - x
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buf[int(x / 8) + y * linewidth] &= ~(0x80 >> (x % 8))
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elif(imwidth == self.height and imheight == self.width):
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logger.debug("Horizontal")
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for y in range(imheight):
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for x in range(imwidth):
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newx = y
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newy = self.height - x - 1
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if pixels[x, y] == 0:
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# newy = imwidth - newy - 1
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buf[int(newx / 8) + newy*linewidth] &= ~(0x80 >> (y % 8))
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return buf
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def display(self, image):
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if self.width%8 == 0:
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linewidth = int(self.width/8)
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else:
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linewidth = int(self.width/8) + 1
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self.SetWindows(0, 0, self.width, self.height);
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for j in range(0, self.height):
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self.SetCursor(0, j);
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self.send_command(0x24);
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for i in range(0, linewidth):
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self.send_data(image[i + j * linewidth])
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self.TurnOnDisplay()
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def Clear(self, color):
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if self.width%8 == 0:
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linewidth = int(self.width/8)
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else:
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linewidth = int(self.width/8) + 1
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self.SetWindows(0, 0, self.width, self.height);
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for j in range(0, self.height):
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self.SetCursor(0, j);
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self.send_command(0x24);
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for i in range(0, linewidth):
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self.send_data(color)
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self.TurnOnDisplay()
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def sleep(self):
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self.send_command(0x10) #enter deep sleep
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self.send_data(0x01)
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epdconfig.delay_ms(100)
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epdconfig.delay_ms(2000)
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epdconfig.module_exit()
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### END OF FILE ###
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