243 lines
7.8 KiB
Python
243 lines
7.8 KiB
Python
# *****************************************************************************
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# * | File : epd2in13g.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: V1.0
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# * | Date : 2023-05-29
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# # | Info : python demo
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# -----------------------------------------------------------------------------
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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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import PIL
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from PIL import Image
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import io
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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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self.BLACK = 0x000000 # 00 BGR
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self.WHITE = 0xffffff # 01
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self.YELLOW = 0x00ffff # 10
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self.RED = 0x0000ff # 11
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self.Gate_BITS = EPD_HEIGHT
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if self.width < 128:
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self.Source_BITS = 128
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else:
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self.Source_BITS = self.width
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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) # module reset
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epdconfig.delay_ms(2)
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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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logger.debug("e-Paper busy H")
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epdconfig.delay_ms(100)
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while(epdconfig.digital_read(self.busy_pin) == 0): # 0: idle, 1: busy
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epdconfig.delay_ms(5)
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logger.debug("e-Paper busy release")
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def SetWindow(self):
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self.send_command(0x61) # SET_RAM_X_ADDRESS_START_END_POSITION
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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(int(self.Source_BITS/256))
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self.send_data(self.Source_BITS%256)
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self.send_data(int(self.Gate_BITS/256))
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self.send_data(self.Gate_BITS%256)
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def TurnOnDisplay(self):
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self.send_command(0x12) # DISPLAY_REFRESH
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self.send_data(0X00)
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self.ReadBusy()
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def init(self):
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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.ReadBusy()
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self.send_command(0x4D)
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self.send_data(0x78)
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self.send_command(0x00)
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self.send_data(0x0F)
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self.send_data(0x29)
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self.send_command(0x01)
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self.send_data(0x07)
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self.send_data(0x00)
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self.send_command(0x03)
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self.send_data(0x10)
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self.send_data(0x54)
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self.send_data(0x44)
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self.send_command(0x06)
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self.send_data(0x05)
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self.send_data(0x00)
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self.send_data(0x3F)
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self.send_data(0x0A)
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self.send_data(0x25)
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self.send_data(0x12)
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self.send_data(0x1A)
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self.send_command(0x50)
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self.send_data(0x37)
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self.send_command(0x60)
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self.send_data(0x02)
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self.send_data(0x02)
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self.SetWindow()
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self.send_command(0xE7)
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self.send_data(0x1C)
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self.send_command(0xE3)
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self.send_data(0x22)
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self.send_command(0xB4)
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self.send_data(0xD0)
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self.send_command(0xB5)
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self.send_data(0x03)
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self.send_command(0xE9)
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self.send_data(0x01)
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self.send_command(0x30)
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self.send_data(0x08)
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self.send_command(0x04)
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self.ReadBusy()
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return 0
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def getbuffer(self, image):
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# Create a pallette with the 4 colors supported by the panel
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pal_image = Image.new("P", (1,1))
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pal_image.putpalette( (0,0,0, 255,255,255, 255,255,0, 255,0,0) + (0,0,0)*252)
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# Check if we need to rotate the image
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imwidth, imheight = image.size
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if(imwidth == self.width and imheight == self.height):
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image_temp = image
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elif(imwidth == self.height and imheight == self.width):
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image_temp = image.rotate(90, expand=True)
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else:
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logger.warning("Invalid image dimensions: %d x %d, expected %d x %d" % (imwidth, imheight, self.width, self.height))
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# Convert the soruce image to the 4 colors, dithering if needed
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image_4color = image_temp.convert("RGB").quantize(palette=pal_image)
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buf_4color = bytearray(image_4color.tobytes('raw'))
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# into a single byte to transfer to the panel
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if self.width % 4 == 0 :
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Width = self.width // 4
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else :
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Width = self.width // 4 + 1
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Height = self.height
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buf = [0x00] * int(Width * Height)
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idx = 0
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for j in range(0, Height):
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for i in range(0, Width):
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if i == Width -1:
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buf[i + j * Width] = (buf_4color[idx] << 6) + (buf_4color[idx+1] << 4)
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idx = idx + 2
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else:
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buf[i + j * Width] = (buf_4color[idx] << 6) + (buf_4color[idx+1] << 4) + (buf_4color[idx+2] << 2) + buf_4color[idx+3]
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idx = idx + 4
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return buf
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def display(self, image):
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if self.width % 4 == 0 :
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Width = self.width // 4
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else :
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Width = self.width // 4 + 1
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Height = self.height
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self.send_command(0x10)
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for j in range(0, Height):
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for i in range(0, self.Source_BITS//4):
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if i < 31 :
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self.send_data(image[i + j * Width])
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else :
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self.send_data(0x00)
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self.TurnOnDisplay()
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def Clear(self, color=0x55):
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Width = self.Source_BITS//4
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Height = self.height
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self.send_command(0x10)
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for j in range(0, Height):
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for i in range(0, Width):
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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(0x02) # POWER_OFF
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self.ReadBusy()
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epdconfig.delay_ms(100)
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self.send_command(0x07) # DEEP_SLEEP
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self.send_data(0XA5)
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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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