140 wiersze
6.0 KiB
Python
140 wiersze
6.0 KiB
Python
# MicroPython library for Waveshare 2.7" B/W e-paper display GDEW027W3
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from micropython import const
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from time import sleep_ms
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# Display resolution
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EPD_WIDTH = const(176)
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EPD_HEIGHT = const(264)
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# Display commands
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PANEL_SETTING = const(0x00)
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POWER_SETTING = const(0x01)
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#POWER_OFF = const(0x02)
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#POWER_OFF_SEQUENCE_SETTING = const(0x03)
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POWER_ON = const(0x04)
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#POWER_ON_MEASURE = const(0x05)
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BOOSTER_SOFT_START = const(0x06)
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DEEP_SLEEP = const(0x07)
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DATA_START_TRANSMISSION_1 = const(0x10)
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#DATA_STOP = const(0x11)
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DISPLAY_REFRESH = const(0x12)
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DATA_START_TRANSMISSION_2 = const(0x13) # not in datasheet
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#PARTIAL_DATA_START_TRANSMISSION_1 = const(0x14)
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#PARTIAL_DATA_START_TRANSMISSION_2 = const(0x15)
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PARTIAL_DISPLAY_REFRESH = const(0x16)
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LUT_FOR_VCOM = const(0x20) # LUT for VCOM(LUT1)
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LUT_WHITE_TO_WHITE = const(0x21) # White to white LUT (LUTWW)
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LUT_BLACK_TO_WHITE = const(0x22) # Black to white LUT (LUTBW/LUTR)
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LUT_WHITE_TO_BLACK = const(0x23) # White to Black LUT (LUTWB/LUTW)
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LUT_BLACK_TO_BLACK = const(0x24) # Black to Black LUT (LUTBB/LUTB)
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PLL_CONTROL = const(0x30)
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#TEMPERATURE_SENSOR_COMMAND = const(0x40)
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#TEMPERATURE_SENSOR_CALIBRATION = const(0x41)
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#TEMPERATURE_SENSOR_WRITE = const(0x42)
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#TEMPERATURE_SENSOR_READ = const(0x43)
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#VCOM_AND_DATA_INTERVAL_SETTING = const(0x50)
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#LOW_POWER_DETECTION = const(0x51)
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#TCON_SETTING = const(0x60)
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#TCON_RESOLUTION = const(0x61)
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#SOURCE_AND_GATE_START_SETTING = const(0x62)
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#GET_STATUS = const(0x71)
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#AUTO_MEASURE_VCOM = const(0x80)
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#VCOM_VALUE = const(0x81)
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VCM_DC_SETTING_REGISTER = const(0x82)
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#PROGRAM_MODE = const(0xA0)
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#ACTIVE_PROGRAM = const(0xA1)
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#READ_OTP_DATA = const(0xA2)
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POWER_OPTIMIZATION = const(0xF8) # Power optimization in flow diagram
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class EPD:
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def __init__(self, spi, cs, dc, rst, busy):
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self.spi = spi
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self.cs = cs
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self.dc = dc
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self.rst = rst
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self.busy = busy
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self.cs.init(self.cs.OUT, value=1)
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self.dc.init(self.dc.OUT, value=0)
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self.rst.init(self.rst.OUT, value=0)
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self.busy.init(self.busy.IN)
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self.width = EPD_WIDTH
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self.height = EPD_HEIGHT
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LUT_VCOM_DC = bytearray(b'\x00\x00\x00\x0F\x0F\x00\x00\x05\x00\x32\x32\x00\x00\x02\x00\x0F\x0F\x00\x00\x05\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00')
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LUT_WW = bytearray(b'\x50\x0F\x0F\x00\x00\x05\x60\x32\x32\x00\x00\x02\xA0\x0F\x0F\x00\x00\x05\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00') # R21H
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LUT_BW = LUT_BW # R22H r
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LUT_BB = bytearray(b'\xA0\x0F\x0F\x00\x00\x05\x60\x32\x32\x00\x00\x02\x50\x0F\x0F\x00\x00\x05\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00') # R24H b
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LUT_WB = LUT_BB # R23H w
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def _command(self, command, data=None):
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self.dc.low()
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self.cs.low()
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self.spi.write(bytearray([command]))
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self.cs.high()
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if data is not None:
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self._data(data)
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def _data(self, data):
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self.dc.high()
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self.cs.low()
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self.spi.write(data)
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self.cs.high()
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def init(self):
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self.reset()
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self._command(POWER_SETTING, b'\x03\x00\x2B\x2B\x09') # VDS_EN VDG_EN, VCOM_HV VGHL_LV[1] VGHL_LV[0], VDH, VDL, VDHR
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self._command(BOOSTER_SOFT_START, b'\x07\x07\x17')
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self._command(POWER_OPTIMIZATION, b'\x60\xA5')
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self._command(POWER_OPTIMIZATION, b'\x89\xA5')
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self._command(POWER_OPTIMIZATION, b'\x90\x00')
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self._command(POWER_OPTIMIZATION, b'\x93\x2A')
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self._command(POWER_OPTIMIZATION, b'\xA0\xA5')
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self._command(POWER_OPTIMIZATION, b'\xA1\x00')
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self._command(POWER_OPTIMIZATION, b'\x73\x41')
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self._command(PARTIAL_DISPLAY_REFRESH, b'\x00')
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self._command(POWER_ON)
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self.wait_until_idle()
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self._command(PANEL_SETTING, b'\xAF') # KW-BF KWR-AF BWROTP 0f
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self._command(PLL_CONTROL, b'\x3A') # 3A 100HZ 29 150Hz 39 200HZ 31 171HZ
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self._command(VCM_DC_SETTING_REGISTER, b'\x12')
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sleep_ms(2)
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self.set_lut()
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def wait_until_idle(self):
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while self.busy.value() == 1:
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sleep_ms(100)
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def reset(self):
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self.rst.low()
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sleep_ms(200)
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self.rst.high()
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sleep_ms(200)
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def set_lut(self):
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self._command(LUT_FOR_VCOM, self.LUT_VCOM_DC) # vcom
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self._command(LUT_WHITE_TO_WHITE, self.LUT_WW) # ww --
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self._command(LUT_BLACK_TO_WHITE, self.LUT_BW) # bw r
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self._command(LUT_WHITE_TO_BLACK, self.LUT_BB) # wb w
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self._command(LUT_BLACK_TO_BLACK, self.LUT_WB) # bb b
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# draw the current frame memory
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def display_frame(self, frame_buffer):
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if (frame_buffer != None):
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self._command(DATA_START_TRANSMISSION_1)
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sleep_ms(2)
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for i in range(0, self.width * self.height // 8):
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self._data(bytearray([0xFF]))
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sleep_ms(2)
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self._command(DATA_START_TRANSMISSION_2)
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sleep_ms(2)
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for i in range(0, self.width * self.height // 8):
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self._data(bytearray([frame_buffer[i]]))
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sleep_ms(2)
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self._command(DISPLAY_REFRESH)
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self.wait_until_idle()
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# to wake call reset() or init()
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def sleep(self):
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self._command(DEEP_SLEEP, b'\xA5')
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