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huanglinsd
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lib/waveshare_epd/epd2in7b.py
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270
lib/waveshare_epd/epd2in7b.py
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# *****************************************************************************
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# * | File : epd2in7b.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 = 176
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EPD_HEIGHT = 264
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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_vcom_dc = [
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0x00, 0x00,
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0x00, 0x1A, 0x1A, 0x00, 0x00, 0x01,
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0x00, 0x0A, 0x0A, 0x00, 0x00, 0x08,
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0x00, 0x0E, 0x01, 0x0E, 0x01, 0x10,
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0x00, 0x0A, 0x0A, 0x00, 0x00, 0x08,
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0x00, 0x04, 0x10, 0x00, 0x00, 0x05,
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0x00, 0x03, 0x0E, 0x00, 0x00, 0x0A,
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0x00, 0x23, 0x00, 0x00, 0x00, 0x01
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]
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lut_ww = [
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0x90, 0x1A, 0x1A, 0x00, 0x00, 0x01,
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0x40, 0x0A, 0x0A, 0x00, 0x00, 0x08,
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0x84, 0x0E, 0x01, 0x0E, 0x01, 0x10,
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0x80, 0x0A, 0x0A, 0x00, 0x00, 0x08,
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0x00, 0x04, 0x10, 0x00, 0x00, 0x05,
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0x00, 0x03, 0x0E, 0x00, 0x00, 0x0A,
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0x00, 0x23, 0x00, 0x00, 0x00, 0x01
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]
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# R22H r
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lut_bw = [
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0xA0, 0x1A, 0x1A, 0x00, 0x00, 0x01,
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0x00, 0x0A, 0x0A, 0x00, 0x00, 0x08,
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0x84, 0x0E, 0x01, 0x0E, 0x01, 0x10,
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0x90, 0x0A, 0x0A, 0x00, 0x00, 0x08,
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0xB0, 0x04, 0x10, 0x00, 0x00, 0x05,
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0xB0, 0x03, 0x0E, 0x00, 0x00, 0x0A,
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0xC0, 0x23, 0x00, 0x00, 0x00, 0x01
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]
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# R23H w
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lut_bb = [
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0x90, 0x1A, 0x1A, 0x00, 0x00, 0x01,
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0x40, 0x0A, 0x0A, 0x00, 0x00, 0x08,
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0x84, 0x0E, 0x01, 0x0E, 0x01, 0x10,
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0x80, 0x0A, 0x0A, 0x00, 0x00, 0x08,
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0x00, 0x04, 0x10, 0x00, 0x00, 0x05,
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0x00, 0x03, 0x0E, 0x00, 0x00, 0x0A,
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0x00, 0x23, 0x00, 0x00, 0x00, 0x01
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]
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# R24H b
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lut_wb = [
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0x90, 0x1A, 0x1A, 0x00, 0x00, 0x01,
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0x20, 0x0A, 0x0A, 0x00, 0x00, 0x08,
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0x84, 0x0E, 0x01, 0x0E, 0x01, 0x10,
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0x10, 0x0A, 0x0A, 0x00, 0x00, 0x08,
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0x00, 0x04, 0x10, 0x00, 0x00, 0x05,
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0x00, 0x03, 0x0E, 0x00, 0x00, 0x0A,
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0x00, 0x23, 0x00, 0x00, 0x00, 0x01
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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(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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logging.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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logging.debug("e-Paper busy release")
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def set_lut(self):
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self.send_command(0x20) # vcom
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for count in range(0, 44):
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self.send_data(self.lut_vcom_dc[count])
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self.send_command(0x21) # ww --
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for count in range(0, 42):
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self.send_data(self.lut_ww[count])
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self.send_command(0x22) # bw r
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for count in range(0, 42):
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self.send_data(self.lut_bw[count])
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self.send_command(0x23) # wb w
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for count in range(0, 42):
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self.send_data(self.lut_bb[count])
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self.send_command(0x24) # bb b
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for count in range(0, 42):
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self.send_data(self.lut_wb[count])
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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(0x04) # POWER_ON
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self.ReadBusy()
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self.send_command(0x00) # PANEL_SETTING
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self.send_data(0xaf) #KW-BF KWR-AF BWROTP 0f
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self.send_command(0x30) # PLL_CONTROL
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self.send_data(0x3a) #3A 100HZ 29 150Hz 39 200HZ 31 171HZ
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self.send_command(0x01) # POWER_SETTING
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self.send_data(0x03) # VDS_EN, VDG_EN
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self.send_data(0x00) # VCOM_HV, VGHL_LV[1], VGHL_LV[0]
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self.send_data(0x2b) # VDH
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self.send_data(0x2b) # VDL
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self.send_data(0x09) # VDHR
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self.send_command(0x06) # BOOSTER_SOFT_START
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self.send_data(0x07)
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self.send_data(0x07)
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self.send_data(0x17)
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# Power optimization
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self.send_command(0xF8)
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self.send_data(0x60)
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self.send_data(0xA5)
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# Power optimization
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self.send_command(0xF8)
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self.send_data(0x89)
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self.send_data(0xA5)
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# Power optimization
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self.send_command(0xF8)
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self.send_data(0x90)
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self.send_data(0x00)
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# Power optimization
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self.send_command(0xF8)
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self.send_data(0x93)
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self.send_data(0x2A)
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# Power optimization
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self.send_command(0xF8)
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self.send_data(0x73)
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self.send_data(0x41)
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self.send_command(0x82) # VCM_DC_SETTING_REGISTER
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self.send_data(0x12)
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self.send_command(0x50) # VCOM_AND_DATA_INTERVAL_SETTING
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self.send_data(0x87) # define by OTP
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self.set_lut()
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self.send_command(0x16) # PARTIAL_DISPLAY_REFRESH
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self.send_data(0x00)
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return 0
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def getbuffer(self, image):
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# logging.debug("bufsiz = ",int(self.width/8) * self.height)
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buf = [0xFF] * (int(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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# logging.debug("imwidth = %d, imheight = %d",imwidth,imheight)
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if(imwidth == self.width and imheight == self.height):
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logging.debug("Vertical")
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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[int((x + y * self.width) / 8)] &= ~(0x80 >> (x % 8))
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elif(imwidth == self.height and imheight == self.width):
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logging.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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buf[int((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(0x10)
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for i in range(0, int(self.width * self.height / 8)):
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self.send_data(~imageblack[i])
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self.send_command(0x11)
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self.send_command(0x13)
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for i in range(0, int(self.width * self.height / 8)):
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self.send_data(~imagered[i])
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self.send_command(0x11)
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self.send_command(0x12)
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self.ReadBusy()
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def Clear(self, color=0x00):
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self.send_command(0x10)
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for i in range(0, int(self.width * self.height / 8)):
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self.send_data(color)
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self.send_command(0x11)
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self.send_command(0x13)
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for i in range(0, int(self.width * self.height / 8)):
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self.send_data(color)
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self.send_command(0x11)
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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(0X50)
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self.send_data(0xf7)
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self.send_command(0X02)
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self.send_command(0X07)
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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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