179 lines
5.8 KiB
Python
179 lines
5.8 KiB
Python
"""
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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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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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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 inkycal.display.drivers import epdconfig
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# Display resolution
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EPD_WIDTH = 800
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EPD_HEIGHT = 480
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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(20)
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epdconfig.digital_write(self.reset_pin, 0)
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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(20)
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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.writebytes2(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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self.send_command(0x71)
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busy = epdconfig.digital_read(self.busy_pin)
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while (busy == 0):
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self.send_command(0x71)
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busy = epdconfig.digital_read(self.busy_pin)
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epdconfig.delay_ms(20)
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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(0x06) # btst
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self.send_data(0x17)
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self.send_data(0x17)
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self.send_data(0x28) # If an exception is displayed, try using 0x38
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self.send_data(0x17)
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self.send_command(0x01) # POWER SETTING
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self.send_data(0x07)
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self.send_data(0x07) # VGH=20V,VGL=-20V
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self.send_data(0x3f) # VDH=15V
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self.send_data(0x3f) # VDL=-15V
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self.send_command(0x04) # POWER ON
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epdconfig.delay_ms(100)
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self.ReadBusy()
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self.send_command(0X00) # PANNEL SETTING
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self.send_data(0x1F) # KW-3f KWR-2F BWROTP 0f BWOTP 1f
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self.send_command(0x61) # tres
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self.send_data(0x03) # source 800
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self.send_data(0x20)
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self.send_data(0x01) # gate 480
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self.send_data(0xE0)
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self.send_command(0X15)
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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(0x10)
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self.send_data(0x07)
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self.send_command(0X60) # TCON SETTING
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self.send_data(0x22)
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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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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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# image has correct dimensions, but needs to be rotated
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img = img.rotate(90, expand=True).convert('1')
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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 [0x00] * (int(self.width / 8) * self.height)
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buf = bytearray(img.tobytes('raw'))
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# The bytes need to be inverted, because in the PIL world 0=black and 1=white, but
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# in the e-paper world 0=white and 1=black.
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for i in range(len(buf)):
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buf[i] ^= 0xFF
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return buf
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def display(self, image):
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self.send_command(0x13)
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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 = [0x00] * (int(self.width / 8) * self.height)
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self.send_command(0x10)
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self.send_data2(buf)
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self.send_command(0x13)
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self.send_data2(buf)
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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 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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