138 wiersze
4.8 KiB
Python
138 wiersze
4.8 KiB
Python
# MicroPython library for Waveshare 7.5" B/W/R e-paper display GDEW075Z09
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from micropython import const
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from time import sleep_ms
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import ustruct
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# Display resolution
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EPD_WIDTH = const(640)
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EPD_HEIGHT = const(384)
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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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#IMAGE_PROCESS = const(0x13)
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#LUT_FOR_VCOM = const(0x20)
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#LUT_BLUE = const(0x21)
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#LUT_WHITE = const(0x22)
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#LUT_GRAY_1 = const(0x23)
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#LUT_GRAY_2 = const(0x24)
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#LUT_RED_0 = const(0x25)
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#LUT_RED_1 = const(0x26)
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#LUT_RED_2 = const(0x27)
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#LUT_RED_3 = const(0x28)
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#LUT_XON = const(0x29)
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PLL_CONTROL = const(0x30)
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#TEMPERATURE_SENSOR_COMMAND = const(0x40)
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TEMPERATURE_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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#SPI_FLASH_CONTROL = const(0x65)
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#REVISION = const(0x70)
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#GET_STATUS = const(0x71)
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#AUTO_MEASUREMENT_VCOM = const(0x80)
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#READ_VCOM_VALUE = const(0x81)
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VCM_DC_SETTING = const(0x82)
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FLASH_MODE = const(0xE5)
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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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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'\x37\x00')
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self._command(PANEL_SETTING, b'\xCF\x08')
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self._command(BOOSTER_SOFT_START, b'\xC7\xCC\x28')
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self._command(POWER_ON)
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self.wait_until_idle()
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self._command(PLL_CONTROL, b'\x3C')
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self._command(TEMPERATURE_CALIBRATION, b'\x00')
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self._command(VCOM_AND_DATA_INTERVAL_SETTING, b'\x77')
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self._command(TCON_SETTING, b'\x22')
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self._command(TCON_RESOLUTION, ustruct.pack(">HH", EPD_WIDTH, EPD_HEIGHT))
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self._command(VCM_DC_SETTING, b'\x1E') # decide by LUT file
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self._command(FLASH_MODE, b'\x03')
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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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# draw the current frame memory
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def display_frame(self, frame_buffer):
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self._command(DATA_START_TRANSMISSION_1)
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for i in range(0, self.width // 4 * self.height):
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temp1 = frame_buffer[i]
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j = 0
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while (j < 4):
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if ((temp1 & 0xC0) == 0xC0):
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temp2 = 0x03
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elif ((temp1 & 0xC0) == 0x00):
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temp2 = 0x00
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else:
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temp2 = 0x04
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temp2 = (temp2 << 4) & 0xFF
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temp1 = (temp1 << 2) & 0xFF
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j += 1
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if ((temp1 & 0xC0) == 0xC0):
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temp2 |= 0x03
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elif ((temp1 & 0xC0) == 0x00):
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temp2 |= 0x00
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else:
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temp2 |= 0x04
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temp1 = (temp1 << 2) & 0xFF
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self._data(bytearray([temp2]))
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j += 1
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self._command(DISPLAY_REFRESH)
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sleep_ms(100)
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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(POWER_OFF)
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self.wait_until_idle()
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self._command(DEEP_SLEEP, b'\xA5')
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