194 lines
6.6 KiB
Python
194 lines
6.6 KiB
Python
# SPDX-FileCopyrightText: 2018 Dean Miller for Adafruit Industries
|
|
#
|
|
# SPDX-License-Identifier: MIT
|
|
|
|
"""
|
|
`adafruit_epd.ssd1681` - Adafruit SSD1681 - ePaper display driver
|
|
====================================================================================
|
|
CircuitPython driver for Adafruit SSD1681 display breakouts
|
|
* Author(s): Dean Miller, Ladyada, Melissa LeBlanc-Williams
|
|
"""
|
|
|
|
import time
|
|
|
|
import adafruit_framebuf
|
|
from micropython import const
|
|
|
|
from adafruit_epd.epd import Adafruit_EPD
|
|
|
|
try:
|
|
import typing # pylint: disable=unused-import
|
|
|
|
from busio import SPI
|
|
from digitalio import DigitalInOut
|
|
from typing_extensions import Literal
|
|
|
|
except ImportError:
|
|
pass
|
|
|
|
__version__ = "0.0.0+auto.0"
|
|
__repo__ = "https://github.com/adafruit/Adafruit_CircuitPython_EPD.git"
|
|
|
|
_SSD1681_DRIVER_CONTROL = const(0x01)
|
|
_SSD1681_GATE_VOLTAGE = const(0x03)
|
|
_SSD1681_SOURCE_VOLTAGE = const(0x04)
|
|
_SSD1681_INIT_SETTING = const(0x08)
|
|
_SSD1681_INIT_WRITE_REG = const(0x09)
|
|
_SSD1681_INIT_READ_REG = const(0x0A)
|
|
_SSD1681_BOOSTER_SOFT_START = const(0x0C)
|
|
_SSD1681_DEEP_SLEEP = const(0x10)
|
|
_SSD1681_DATA_MODE = const(0x11)
|
|
_SSD1681_SW_RESET = const(0x12)
|
|
_SSD1681_HV_DETECT = const(0x14)
|
|
_SSD1681_VCI_DETECT = const(0x15)
|
|
_SSD1681_TEMP_CONTROL = const(0x18)
|
|
_SSD1681_TEMP_WRITE = const(0x1A)
|
|
_SSD1681_TEMP_READ = const(0x1B)
|
|
_SSD1681_EXTTEMP_WRITE = const(0x1C)
|
|
_SSD1681_MASTER_ACTIVATE = const(0x20)
|
|
_SSD1681_DISP_CTRL1 = const(0x21)
|
|
_SSD1681_DISP_CTRL2 = const(0x22)
|
|
_SSD1681_WRITE_BWRAM = const(0x24)
|
|
_SSD1681_WRITE_REDRAM = const(0x26)
|
|
_SSD1681_READ_RAM = const(0x27)
|
|
_SSD1681_VCOM_SENSE = const(0x28)
|
|
_SSD1681_VCOM_DURATION = const(0x29)
|
|
_SSD1681_WRITE_VCOM_OTP = const(0x2A)
|
|
_SSD1681_WRITE_VCOM_CTRL = const(0x2B)
|
|
_SSD1681_WRITE_VCOM_REG = const(0x2C)
|
|
_SSD1681_READ_OTP = const(0x2D)
|
|
_SSD1681_READ_USERID = const(0x2E)
|
|
_SSD1681_READ_STATUS = const(0x2F)
|
|
_SSD1681_WRITE_WS_OTP = const(0x30)
|
|
_SSD1681_LOAD_WS_OTP = const(0x31)
|
|
_SSD1681_WRITE_LUT = const(0x32)
|
|
_SSD1681_CRC_CALC = const(0x34)
|
|
_SSD1681_CRC_READ = const(0x35)
|
|
_SSD1681_PROG_OTP = const(0x36)
|
|
_SSD1681_WRITE_DISPLAY_OPT = const(0x37)
|
|
_SSD1681_WRITE_USERID = const(0x38)
|
|
_SSD1681_OTP_PROGMODE = const(0x39)
|
|
_SSD1681_WRITE_BORDER = const(0x3C)
|
|
_SSD1681_END_OPTION = const(0x3F)
|
|
_SSD1681_SET_RAMXPOS = const(0x44)
|
|
_SSD1681_SET_RAMYPOS = const(0x45)
|
|
_SSD1681_AUTOWRITE_RED = const(0x46)
|
|
_SSD1681_AUTOWRITE_BW = const(0x47)
|
|
_SSD1681_SET_RAMXCOUNT = const(0x4E)
|
|
_SSD1681_SET_RAMYCOUNT = const(0x4F)
|
|
_SSD1681_NOP = const(0xFF)
|
|
|
|
|
|
class Adafruit_SSD1681(Adafruit_EPD):
|
|
"""driver class for Adafruit SSD1681 ePaper display breakouts"""
|
|
|
|
# pylint: disable=too-many-arguments
|
|
def __init__(
|
|
self,
|
|
width: int,
|
|
height: int,
|
|
spi: SPI,
|
|
*,
|
|
cs_pin: DigitalInOut,
|
|
dc_pin: DigitalInOut,
|
|
sramcs_pin: DigitalInOut,
|
|
rst_pin: DigitalInOut,
|
|
busy_pin: DigitalInOut,
|
|
) -> None:
|
|
super().__init__(width, height, spi, cs_pin, dc_pin, sramcs_pin, rst_pin, busy_pin)
|
|
|
|
if height % 8 != 0:
|
|
height += 8 - height % 8
|
|
self._height = height
|
|
|
|
self._buffer1_size = int(width * height / 8)
|
|
self._buffer2_size = int(width * height / 8)
|
|
|
|
if sramcs_pin:
|
|
self._buffer1 = self.sram.get_view(0)
|
|
self._buffer2 = self.sram.get_view(self._buffer1_size)
|
|
else:
|
|
self._buffer1 = bytearray((width * height) // 8)
|
|
self._buffer2 = bytearray((width * height) // 8)
|
|
self._framebuf1 = adafruit_framebuf.FrameBuffer(
|
|
self._buffer1, width, height, buf_format=adafruit_framebuf.MHMSB
|
|
)
|
|
self._framebuf2 = adafruit_framebuf.FrameBuffer(
|
|
self._buffer2, width, height, buf_format=adafruit_framebuf.MHMSB
|
|
)
|
|
self.set_black_buffer(0, True)
|
|
self.set_color_buffer(1, False)
|
|
# pylint: enable=too-many-arguments
|
|
|
|
def begin(self, reset: bool = True) -> None:
|
|
"""Begin communication with the display and set basic settings"""
|
|
if reset:
|
|
self.hardware_reset()
|
|
self.power_down()
|
|
|
|
def busy_wait(self) -> None:
|
|
"""Wait for display to be done with current task, either by polling the
|
|
busy pin, or pausing"""
|
|
if self._busy:
|
|
while self._busy.value:
|
|
time.sleep(0.01)
|
|
else:
|
|
time.sleep(0.5)
|
|
|
|
def power_up(self) -> None:
|
|
"""Power up the display in preparation for writing RAM and updating"""
|
|
self.hardware_reset()
|
|
self.busy_wait()
|
|
self.command(_SSD1681_SW_RESET)
|
|
self.busy_wait()
|
|
# driver output control
|
|
self.command(
|
|
_SSD1681_DRIVER_CONTROL,
|
|
bytearray([self._width - 1, (self._width - 1) >> 8, 0x00]),
|
|
)
|
|
# data entry mode
|
|
self.command(_SSD1681_DATA_MODE, bytearray([0x03]))
|
|
# Set ram X start/end postion
|
|
self.command(_SSD1681_SET_RAMXPOS, bytearray([0x00, self._height // 8 - 1]))
|
|
# Set ram Y start/end postion
|
|
self.command(
|
|
_SSD1681_SET_RAMYPOS,
|
|
bytearray([0, 0, self._height - 1, (self._height - 1) >> 8]),
|
|
)
|
|
# Set border waveform
|
|
self.command(_SSD1681_WRITE_BORDER, bytearray([0x05]))
|
|
# Set temperature control
|
|
self.command(_SSD1681_TEMP_CONTROL, bytearray([0x80]))
|
|
|
|
self.busy_wait()
|
|
|
|
def power_down(self) -> None:
|
|
"""Power down the display - required when not actively displaying!"""
|
|
self.command(_SSD1681_DEEP_SLEEP, bytearray([0x01]))
|
|
time.sleep(0.1)
|
|
|
|
def update(self) -> None:
|
|
"""Update the display from internal memory"""
|
|
self.command(_SSD1681_DISP_CTRL2, bytearray([0xF7]))
|
|
self.command(_SSD1681_MASTER_ACTIVATE)
|
|
self.busy_wait()
|
|
if not self._busy:
|
|
time.sleep(3) # wait 3 seconds
|
|
|
|
def write_ram(self, index: Literal[0, 1]) -> int:
|
|
"""Send the one byte command for starting the RAM write process. Returns
|
|
the byte read at the same time over SPI. index is the RAM buffer, can be
|
|
0 or 1 for tri-color displays."""
|
|
if index == 0:
|
|
return self.command(_SSD1681_WRITE_BWRAM, end=False)
|
|
if index == 1:
|
|
return self.command(_SSD1681_WRITE_REDRAM, end=False)
|
|
raise RuntimeError("RAM index must be 0 or 1")
|
|
|
|
def set_ram_address(self, x: int, y: int) -> None: # noqa: PLR6301, F841
|
|
"""Set the RAM address location, not used on this chipset but required by
|
|
the superclass"""
|
|
# Set RAM X address counter
|
|
self.command(_SSD1681_SET_RAMXCOUNT, bytearray([x]))
|
|
# Set RAM Y address counter
|
|
self.command(_SSD1681_SET_RAMYCOUNT, bytearray([y, y >> 8]))
|