157 lines
6.4 KiB
Python
157 lines
6.4 KiB
Python
# The MIT License (MIT)
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#
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# Copyright (c) 2018 Dean Miller for Adafruit Industries
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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 documentation 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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# furnished 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 FOR 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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`adafruit_epd.ssd1608` - Adafruit SSD1608 - ePaper display driver
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====================================================================================
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CircuitPython driver for Adafruit SSD1608 display breakouts
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* Author(s): Dean Miller, Ladyada
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"""
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import time
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from micropython import const
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import adafruit_framebuf
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from adafruit_epd.epd import Adafruit_EPD
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_SSD1608_DRIVER_CONTROL = const(0x01)
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_SSD1608_GATE_VOLTAGE = const(0x03)
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_SSD1608_SOURCE_VOLTAGE = const(0x04)
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_SSD1608_DISPLAY_CONTROL = const(0x07)
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_SSD1608_NON_OVERLAP = const(0x0B)
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_SSD1608_BOOSTER_SOFT_START = const(0x0C)
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_SSD1608_GATE_SCAN_START = const(0x0F)
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_SSD1608_DEEP_SLEEP = const(0x10)
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_SSD1608_DATA_MODE = const(0x11)
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_SSD1608_SW_RESET = const(0x12)
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_SSD1608_TEMP_WRITE = const(0x1A)
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_SSD1608_TEMP_READ = const(0x1B)
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_SSD1608_TEMP_CONTROL = const(0x1C)
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_SSD1608_TEMP_LOAD = const(0x1D)
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_SSD1608_MASTER_ACTIVATE = const(0x20)
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_SSD1608_DISP_CTRL1 = const(0x21)
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_SSD1608_DISP_CTRL2 = const(0x22)
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_SSD1608_WRITE_RAM = const(0x24)
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_SSD1608_READ_RAM = const(0x25)
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_SSD1608_VCOM_SENSE = const(0x28)
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_SSD1608_VCOM_DURATION = const(0x29)
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_SSD1608_WRITE_VCOM = const(0x2C)
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_SSD1608_READ_OTP = const(0x2D)
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_SSD1608_WRITE_LUT = const(0x32)
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_SSD1608_WRITE_DUMMY = const(0x3A)
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_SSD1608_WRITE_GATELINE = const(0x3B)
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_SSD1608_WRITE_BORDER = const(0x3C)
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_SSD1608_SET_RAMXPOS = const(0x44)
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_SSD1608_SET_RAMYPOS = const(0x45)
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_SSD1608_SET_RAMXCOUNT = const(0x4E)
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_SSD1608_SET_RAMYCOUNT = const(0x4F)
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_SSD1608_NOP = const(0xFF)
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_LUT_DATA = b'\x02\x02\x01\x11\x12\x12""fiiYX\x99\x99\x88\x00\x00\x00\x00\xf8\xb4\x13Q5QQ\x19\x01\x00' # pylint: disable=line-too-long
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class Adafruit_SSD1608(Adafruit_EPD):
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"""driver class for Adafruit SSD1608 ePaper display breakouts"""
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# pylint: disable=too-many-arguments
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def __init__(self, width, height, spi, *, cs_pin, dc_pin, sramcs_pin, rst_pin, busy_pin):
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super(Adafruit_SSD1608, self).__init__(width, height, spi, cs_pin, dc_pin,
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sramcs_pin, rst_pin, busy_pin)
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if height % 8 != 0:
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height += (8 - height % 8)
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self._height = height
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self._buffer1_size = int(width * height / 8)
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if sramcs_pin:
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self._buffer1 = self.sram.get_view(0)
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else:
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self._buffer1 = bytearray((width * height) // 8)
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self._framebuf1 = adafruit_framebuf.FrameBuffer(self._buffer1, width, height,
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buf_format=adafruit_framebuf.MHMSB)
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self.set_black_buffer(0, True)
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self.set_color_buffer(0, True)
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# pylint: enable=too-many-arguments
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def begin(self, reset=True):
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"""Begin communication with the display and set basic settings"""
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if reset:
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self.hardware_reset()
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self.power_down()
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def busy_wait(self):
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"""Wait for display to be done with current task, either by polling the
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busy pin, or pausing"""
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if self._busy:
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while self._busy.value:
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time.sleep(0.01)
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else:
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time.sleep(0.5)
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def power_up(self):
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"""Power up the display in preparation for writing RAM and updating"""
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self.hardware_reset()
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self.busy_wait()
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self.command(_SSD1608_SW_RESET)
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self.busy_wait()
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# driver output control
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self.command(_SSD1608_DRIVER_CONTROL, bytearray([self._width-1, (self._width-1) >> 8, 0x00]))
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# Set dummy line period
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self.command(_SSD1608_WRITE_DUMMY, bytearray([0x1B]))
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# Set gate line width
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self.command(_SSD1608_WRITE_GATELINE, bytearray([0x0B]))
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# Data entry sequence
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self.command(_SSD1608_DATA_MODE, bytearray([0x03]))
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# Set ram X start/end postion
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self.command(_SSD1608_SET_RAMXPOS, bytearray([0x00, self._height//8 - 1]))
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# Set ram Y start/end postion
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self.command(_SSD1608_SET_RAMYPOS, bytearray([0, 0, self._height - 1, (self._height - 1) >> 8]))
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# Vcom Voltage
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self.command(_SSD1608_WRITE_VCOM, bytearray([0x70]))
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# LUT
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self.command(_SSD1608_WRITE_LUT, _LUT_DATA)
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self.busy_wait()
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def power_down(self):
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"""Power down the display - required when not actively displaying!"""
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self.command(_SSD1608_DEEP_SLEEP, bytearray([0x01]))
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time.sleep(0.1)
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def update(self):
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"""Update the display from internal memory"""
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self.command(_SSD1608_DISP_CTRL2, bytearray([0xC7]))
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self.command(_SSD1608_MASTER_ACTIVATE)
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self.busy_wait()
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if not self._busy:
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time.sleep(3) # wait 3 seconds
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def write_ram(self, index):
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"""Send the one byte command for starting the RAM write process. Returns
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the byte read at the same time over SPI. index is the RAM buffer, can be
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0 or 1 for tri-color displays."""
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if index == 0:
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return self.command(_SSD1608_WRITE_RAM, end=False)
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raise RuntimeError("RAM index must be 0")
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def set_ram_address(self, x, y): # pylint: disable=unused-argument, no-self-use
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"""Set the RAM address location, not used on this chipset but required by
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the superclass"""
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# Set RAM X address counter
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self.command(_SSD1608_SET_RAMXCOUNT, bytearray([x]))
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# Set RAM Y address counter
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self.command(_SSD1608_SET_RAMYCOUNT, bytearray([y>>8, y]))
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