208 lines
8 KiB
Python
208 lines
8 KiB
Python
# //*****************************************************************************
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# * | File : epd4in2b.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: V3.0
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# * | Date : 2018-11-08
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# * | Info : python2 demo
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# * 1.Remove:
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# digital_write(self, pin, value)
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# digital_read(self, pin)
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# delay_ms(self, delaytime)
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# set_lut(self, lut)
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# self.lut = self.lut_full_update
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# * 2.Change:
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# display_frame -> TurnOnDisplay
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# set_memory_area -> SetWindow
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# set_memory_pointer -> SetCursor
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# get_frame_buffer -> getbuffer
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# set_frame_memory -> display
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# * 3.How to use
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# epd = epd4in2b.EPD()
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# epd.init(epd.lut_full_update)
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# image = Image.new('1', (epd4in2b.EPD_WIDTH, epd4in2b.EPD_HEIGHT), 255)
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# ...
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# drawing ......
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# ...
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# epd.display(getbuffer(image))
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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 epdconfig
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from PIL import Image
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import RPi.GPIO as GPIO
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# Display resolution
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EPD_WIDTH = 400
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EPD_HEIGHT = 300
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# EPD4IN2B commands
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PANEL_SETTING = 0x00
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POWER_SETTING = 0x01
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POWER_OFF = 0x02
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POWER_OFF_SEQUENCE_SETTING = 0x03
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POWER_ON = 0x04
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POWER_ON_MEASURE = 0x05
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BOOSTER_SOFT_START = 0x06
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DEEP_SLEEP = 0x07
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DATA_START_TRANSMISSION_1 = 0x10
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DATA_STOP = 0x11
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DISPLAY_REFRESH = 0x12
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DATA_START_TRANSMISSION_2 = 0x13
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VCOM_LUT = 0x20
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W2W_LUT = 0x21
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B2W_LUT = 0x22
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W2B_LUT = 0x23
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B2B_LUT = 0x24
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PLL_CONTROL = 0x30
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TEMPERATURE_SENSOR_CALIBRATION = 0x40
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TEMPERATURE_SENSOR_SELECTION = 0x41
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TEMPERATURE_SENSOR_WRITE = 0x42
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TEMPERATURE_SENSOR_READ = 0x43
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VCOM_AND_DATA_INTERVAL_SETTING = 0x50
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LOW_POWER_DETECTION = 0x51
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TCON_SETTING = 0x60
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RESOLUTION_SETTING = 0x61
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GSST_SETTING = 0x65
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GET_STATUS = 0x71
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AUTO_MEASURE_VCOM = 0x80
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VCOM_VALUE = 0x81
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VCM_DC_SETTING = 0x82
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PARTIAL_WINDOW = 0x90
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PARTIAL_IN = 0x91
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PARTIAL_OUT = 0x92
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PROGRAM_MODE = 0xA0
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ACTIVE_PROGRAM = 0xA1
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READ_OTP_DATA = 0xA2
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POWER_SAVING = 0xE3
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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, GPIO.HIGH)
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epdconfig.delay_ms(200)
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epdconfig.digital_write(self.reset_pin, GPIO.LOW) # module reset
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epdconfig.delay_ms(200)
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epdconfig.digital_write(self.reset_pin, GPIO.HIGH)
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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.cs_pin, GPIO.LOW)
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epdconfig.digital_write(self.dc_pin, GPIO.LOW)
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epdconfig.spi_writebyte([command])
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epdconfig.digital_write(self.cs_pin, GPIO.HIGH)
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def send_data(self, data):
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epdconfig.digital_write(self.cs_pin, GPIO.LOW)
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epdconfig.digital_write(self.dc_pin, GPIO.HIGH)
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epdconfig.spi_writebyte([data])
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epdconfig.digital_write(self.cs_pin, GPIO.HIGH)
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def wait_until_idle(self):
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print("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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print("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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self.reset()
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self.send_command(BOOSTER_SOFT_START)
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self.send_data (0x17)
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self.send_data (0x17)
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self.send_data (0x17) # 07 0f 17 1f 27 2F 37 2f
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self.send_command(POWER_ON)
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self.wait_until_idle()
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self.send_command(PANEL_SETTING)
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self.send_data(0x0F) # LUT from OTP
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return 0
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def getbuffer(self, image):
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# print "bufsiz = ",(self.width//8) * self.height
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buf = [0xFF] * ((self.width//8) * 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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# print "imwidth = %d, imheight = %d",imwidth,imheight
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if(imwidth == self.width and imheight == self.height):
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print("Horizontal")
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for y in range(imheight):
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for x in range(imwidth):
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# Set the bits for the column of pixels at the current position.
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if pixels[x, y] == 0:
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buf[(x + y * self.width) // 8] &= ~(0x80 >> (x % 8))
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elif(imwidth == self.height and imheight == self.width):
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print("Vertical")
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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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buf[(newx + newy*self.width) // 8] &= ~(0x80 >> (y % 8))
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return buf
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def display(self, imageblack, imagered):
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self.send_command(DATA_START_TRANSMISSION_1)
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for i in range(0, self.width * self.height // 8):
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self.send_data(imageblack[i])
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self.send_command(DATA_START_TRANSMISSION_2)
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for i in range(0, self.width * self.height // 8):
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self.send_data(imagered[i])
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self.send_command(DISPLAY_REFRESH)
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self.wait_until_idle()
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def Clear(self, color):
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self.send_command(DATA_START_TRANSMISSION_1)
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for i in range(0, self.width * self.height // 8):
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self.send_data(0xFF)
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self.send_command(DATA_START_TRANSMISSION_2)
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for i in range(0, self.width * self.height // 8):
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self.send_data(0xFF)
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self.send_command(DISPLAY_REFRESH)
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self.wait_until_idle()
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def sleep(self):
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self.send_command(VCOM_AND_DATA_INTERVAL_SETTING)
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self.send_data(0xF7) # border floating
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self.send_command(POWER_OFF)
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self.wait_until_idle()
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self.send_command(DEEP_SLEEP)
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self.send_data(0xA5) # check code
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### END OF FILE ###
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