186 lines
6.2 KiB
Python
186 lines
6.2 KiB
Python
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# *****************************************************************************
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# * | File : epd7in5.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 = 640
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EPD_HEIGHT = 384
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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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# 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 send_data2(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_writebyte2(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")
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while(epdconfig.digital_read(self.busy_pin) == 0): # 0: idle, 1: busy
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epdconfig.delay_ms(100)
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logger.debug("e-Paper busy release")
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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.send_command(0x01) # POWER_SETTING
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self.send_data2([0x37, 0x00])
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self.send_command(0x00) # PANEL_SETTING
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self.send_data2([0xCF, 0x08])
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self.send_command(0x06) # BOOSTER_SOFT_START
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self.send_data2([0xc7, 0xcc, 0x28])
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self.send_command(0x04) # POWER_ON
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self.ReadBusy()
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self.send_command(0x30) # PLL_CONTROL
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self.send_data(0x3c)
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self.send_command(0x41) # TEMPERATURE_CALIBRATION
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self.send_data(0x00)
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self.send_command(0x50) # VCOM_AND_DATA_INTERVAL_SETTING
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self.send_data(0x77)
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self.send_command(0x60) # TCON_SETTING
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self.send_data(0x22)
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self.send_command(0x61) # TCON_RESOLUTION
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self.send_data(EPD_WIDTH >> 8) #source 640
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self.send_data(EPD_WIDTH & 0xff)
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self.send_data(EPD_HEIGHT >> 8) #gate 384
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self.send_data(EPD_HEIGHT & 0xff)
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self.send_command(0x82) # VCM_DC_SETTING
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self.send_data(0x1E) # decide by LUT file
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self.send_command(0xe5) # FLASH MODE
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self.send_data(0x03)
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# EPD hardware init end
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return 0
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def getbuffer(self, image):
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img = image
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imwidth, imheight = img.size
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halfwidth = int(self.width / 2)
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buf = [0x33] * halfwidth * self.height
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if(imwidth == self.width and imheight == self.height):
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img = img.convert('1')
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elif(imwidth == self.height and imheight == self.width):
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img = img.rotate(90, expand=True).convert('1')
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imwidth, imheight = img.size
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else:
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logger.warning("Wrong image dimensions: must be " + str(self.width) + "x" + str(self.height))
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# return a blank buffer
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return buf
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pixels = img.load()
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for y in range(imheight):
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offset = y * halfwidth
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for x in range(1, imwidth, 2):
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i = offset + x // 2
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if(pixels[x-1, y] > 191):
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if(pixels[x, y] > 191):
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buf[i] = 0x33
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else:
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buf[i] = 0x30
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else:
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if(pixels[x, y] > 191):
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buf[i] = 0x03
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else:
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buf[i] = 0x00
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return buf
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def display(self, image):
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self.send_command(0x10)
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self.send_data2(image)
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self.send_command(0x12)
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epdconfig.delay_ms(100)
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self.ReadBusy()
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def Clear(self):
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buf = [0x33] * int(self.width * self.height / 2)
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self.send_command(0x10)
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self.send_data2(buf)
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self.send_command(0x12)
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self.ReadBusy()
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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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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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