200 lines
6.9 KiB
Python
200 lines
6.9 KiB
Python
# SPDX-FileCopyrightText: 2018 Dean Miller for Adafruit Industries
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#
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# SPDX-License-Identifier: MIT
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"""
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`adafruit_epd.ssd1680` - Adafruit SSD1680 - ePaper display driver
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====================================================================================
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CircuitPython driver for Adafruit SSD1680 display breakouts
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* Author(s): Melissa LeBlanc-Williams
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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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try:
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"""Needed for type annotations"""
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from typing import Union, Any
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from busio import SPI
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from digitalio import DigitalInOut
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__version__ = "0.0.0+auto.0"
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__repo__ = "https://github.com/adafruit/Adafruit_CircuitPython_EPD.git"
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_SSD1680_DRIVER_CONTROL = const(0x01)
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_SSD1680_GATE_VOLTAGE = const(0x03)
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_SSD1680_SOURCE_VOLTAGE = const(0x04)
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_SSD1680_INIT_SETTING = const(0x08)
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_SSD1680_INIT_WRITE_REG = const(0x09)
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_SSD1680_INIT_READ_REG = const(0x0A)
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_SSD1680_BOOSTER_SOFT_START = const(0x0C)
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_SSD1680_DEEP_SLEEP = const(0x10)
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_SSD1680_DATA_MODE = const(0x11)
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_SSD1680_SW_RESET = const(0x12)
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_SSD1680_HV_DETECT = const(0x14)
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_SSD1680_VCI_DETECT = const(0x15)
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_SSD1680_TEMP_CONTROL = const(0x18)
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_SSD1680_TEMP_WRITE = const(0x1A)
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_SSD1680_TEMP_READ = const(0x1B)
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_SSD1680_EXTTEMP_WRITE = const(0x1C)
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_SSD1680_MASTER_ACTIVATE = const(0x20)
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_SSD1680_DISP_CTRL1 = const(0x21)
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_SSD1680_DISP_CTRL2 = const(0x22)
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_SSD1680_WRITE_BWRAM = const(0x24)
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_SSD1680_WRITE_REDRAM = const(0x26)
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_SSD1680_READ_RAM = const(0x27)
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_SSD1680_VCOM_SENSE = const(0x28)
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_SSD1680_VCOM_DURATION = const(0x29)
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_SSD1680_WRITE_VCOM_OTP = const(0x2A)
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_SSD1680_WRITE_VCOM_CTRL = const(0x2B)
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_SSD1680_WRITE_VCOM_REG = const(0x2C)
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_SSD1680_READ_OTP = const(0x2D)
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_SSD1680_READ_USERID = const(0x2E)
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_SSD1680_READ_STATUS = const(0x2F)
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_SSD1680_WRITE_WS_OTP = const(0x30)
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_SSD1680_LOAD_WS_OTP = const(0x31)
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_SSD1680_WRITE_LUT = const(0x32)
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_SSD1680_CRC_CALC = const(0x34)
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_SSD1680_CRC_READ = const(0x35)
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_SSD1680_PROG_OTP = const(0x36)
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_SSD1680_WRITE_DISPLAY_OPT = const(0x37)
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_SSD1680_WRITE_USERID = const(0x38)
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_SSD1680_OTP_PROGMODE = const(0x39)
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_SSD1680_WRITE_BORDER = const(0x3C)
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_SSD1680_END_OPTION = const(0x3F)
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_SSD1680_SET_RAMXPOS = const(0x44)
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_SSD1680_SET_RAMYPOS = const(0x45)
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_SSD1680_AUTOWRITE_RED = const(0x46)
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_SSD1680_AUTOWRITE_BW = const(0x47)
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_SSD1680_SET_RAMXCOUNT = const(0x4E)
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_SSD1680_SET_RAMYCOUNT = const(0x4F)
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_SSD1680_NOP = const(0xFF)
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class Adafruit_SSD1680(Adafruit_EPD):
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"""driver class for Adafruit SSD1680 ePaper display breakouts"""
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# pylint: disable=too-many-arguments
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def __init__(
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self, width: int, height: int, spi: SPI, *, cs_pin: DigitalInOut,
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dc_pin: DigitalInOut, sramcs_pin: DigitalInOut, rst_pin: DigitalInOut,
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busy_pin: DigitalInOut
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) -> None:
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super().__init__(
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width, height, spi, cs_pin, dc_pin, sramcs_pin, rst_pin, busy_pin
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)
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stride = width
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if stride % 8 != 0:
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stride += 8 - stride % 8
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self._buffer1_size = int(stride * height / 8)
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self._buffer2_size = self._buffer1_size
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if sramcs_pin:
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self._buffer1 = self.sram.get_view(0)
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self._buffer2 = self.sram.get_view(self._buffer1_size)
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else:
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self._buffer1 = bytearray(self._buffer1_size)
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self._buffer2 = bytearray(self._buffer2_size)
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self._framebuf1 = adafruit_framebuf.FrameBuffer(
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self._buffer1,
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width,
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height,
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stride=stride,
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buf_format=adafruit_framebuf.MHMSB,
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)
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self._framebuf2 = adafruit_framebuf.FrameBuffer(
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self._buffer2,
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width,
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height,
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stride=stride,
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buf_format=adafruit_framebuf.MHMSB,
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)
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self.set_black_buffer(0, True)
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self.set_color_buffer(1, False)
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# pylint: enable=too-many-arguments
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def begin(self, reset: bool=True) -> None:
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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) -> None:
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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) -> None:
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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(_SSD1680_SW_RESET)
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self.busy_wait()
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# driver output control
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self.command(
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_SSD1680_DRIVER_CONTROL,
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bytearray([self._height - 1, (self._height - 1) >> 8, 0x00]),
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)
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# data entry mode
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self.command(_SSD1680_DATA_MODE, bytearray([0x03]))
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# Set voltages
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self.command(_SSD1680_WRITE_VCOM_REG, bytearray([0x36]))
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self.command(_SSD1680_GATE_VOLTAGE, bytearray([0x17]))
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self.command(_SSD1680_SOURCE_VOLTAGE, bytearray([0x41, 0x00, 0x32]))
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# Set ram X start/end postion
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self.command(_SSD1680_SET_RAMXPOS, bytearray([0x01, 0x10]))
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# Set ram Y start/end postion
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self.command(
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_SSD1680_SET_RAMYPOS,
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bytearray([0, 0, self._height - 1, (self._height - 1) >> 8]),
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)
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# Set border waveform
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self.command(_SSD1680_WRITE_BORDER, bytearray([0x05]))
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# Set ram X count
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self.command(_SSD1680_SET_RAMXCOUNT, bytearray([0x01]))
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# Set ram Y count
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self.command(_SSD1680_SET_RAMYCOUNT, bytearray([self._height - 1, 0]))
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self.busy_wait()
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def power_down(self) -> None:
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"""Power down the display - required when not actively displaying!"""
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self.command(_SSD1680_DEEP_SLEEP, bytearray([0x01]))
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time.sleep(0.1)
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def update(self) -> None:
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"""Update the display from internal memory"""
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self.command(_SSD1680_DISP_CTRL2, bytearray([0xF4]))
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self.command(_SSD1680_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: Union[0, 1]) -> Any:
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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(_SSD1680_WRITE_BWRAM, end=False)
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if index == 1:
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return self.command(_SSD1680_WRITE_REDRAM, end=False)
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raise RuntimeError("RAM index must be 0 or 1")
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def set_ram_address(self, x: int, y: int) -> None: # 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(_SSD1680_SET_RAMXCOUNT, bytearray([x + 1]))
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# Set RAM Y address counter
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self.command(_SSD1680_SET_RAMYCOUNT, bytearray([y, y >> 8]))
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