165 lines
6.7 KiB
Python
165 lines
6.7 KiB
Python
# SPDX-FileCopyrightText: 2018 Dean Miller for Adafruit Industries
|
|
#
|
|
# SPDX-License-Identifier: MIT
|
|
|
|
"""
|
|
`adafruit_epd.il91874` - Adafruit IL91874 - ePaper display driver
|
|
====================================================================================
|
|
CircuitPython driver for Adafruit IL91874 display breakouts
|
|
* Author(s): Dean Miller, Ladyada
|
|
"""
|
|
|
|
import time
|
|
from micropython import const
|
|
import adafruit_framebuf
|
|
from adafruit_epd.epd import Adafruit_EPD
|
|
|
|
__version__ = "0.0.0-auto.0"
|
|
__repo__ = "https://github.com/adafruit/Adafruit_CircuitPython_EPD.git"
|
|
|
|
_IL91874_PANEL_SETTING = const(0x00)
|
|
_IL91874_POWER_SETTING = const(0x01)
|
|
_IL91874_POWER_OFF = const(0x02)
|
|
_IL91874_POWER_OFF_SEQUENCE = const(0x03)
|
|
_IL91874_POWER_ON = const(0x04)
|
|
_IL91874_POWER_ON_MEASURE = const(0x05)
|
|
_IL91874_BOOSTER_SOFT_START = const(0x06)
|
|
_IL91874_DEEP_SLEEP = const(0x07)
|
|
_IL91874_DTM1 = const(0x10)
|
|
_IL91874_DATA_STOP = const(0x11)
|
|
_IL91874_DISPLAY_REFRESH = const(0x12)
|
|
_IL91874_DTM2 = const(0x13)
|
|
_IL91874_PDTM1 = const(0x14)
|
|
_IL91874_PDTM2 = const(0x15)
|
|
_IL91874_PDRF = const(0x16)
|
|
_IL91874_LUT1 = const(0x20)
|
|
_IL91874_LUTWW = const(0x21)
|
|
_IL91874_LUTBW = const(0x22)
|
|
_IL91874_LUTWB = const(0x23)
|
|
_IL91874_LUTBB = const(0x24)
|
|
_IL91874_PLL = const(0x30)
|
|
_IL91874_CDI = const(0x50)
|
|
_IL91874_RESOLUTION = const(0x61)
|
|
_IL91874_VCM_DC_SETTING = const(0x82)
|
|
|
|
# pylint: disable=line-too-long
|
|
_LUT_VCOMDC = b"\x00\x00\x00\x1a\x1a\x00\x00\x01\x00\n\n\x00\x00\x08\x00\x0e\x01\x0e\x01\x10\x00\n\n\x00\x00\x08\x00\x04\x10\x00\x00\x05\x00\x03\x0e\x00\x00\n\x00#\x00\x00\x00\x01"
|
|
_LUT_WW = b"\x90\x1a\x1a\x00\x00\x01@\n\n\x00\x00\x08\x84\x0e\x01\x0e\x01\x10\x80\n\n\x00\x00\x08\x00\x04\x10\x00\x00\x05\x00\x03\x0e\x00\x00\n\x00#\x00\x00\x00\x01"
|
|
_LUT_BW = b"\xa0\x1a\x1a\x00\x00\x01\x00\n\n\x00\x00\x08\x84\x0e\x01\x0e\x01\x10\x90\n\n\x00\x00\x08\xb0\x04\x10\x00\x00\x05\xb0\x03\x0e\x00\x00\n\xc0#\x00\x00\x00\x01"
|
|
_LUT_BB = b"\x90\x1a\x1a\x00\x00\x01@\n\n\x00\x00\x08\x84\x0e\x01\x0e\x01\x10\x80\n\n\x00\x00\x08\x00\x04\x10\x00\x00\x05\x00\x03\x0e\x00\x00\n\x00#\x00\x00\x00\x01"
|
|
_LUT_WB = b"\x90\x1a\x1a\x00\x00\x01 \n\n\x00\x00\x08\x84\x0e\x01\x0e\x01\x10\x10\n\n\x00\x00\x08\x00\x04\x10\x00\x00\x05\x00\x03\x0e\x00\x00\n\x00#\x00\x00\x00\x01"
|
|
# pylint: enable=line-too-long
|
|
|
|
|
|
class Adafruit_IL91874(Adafruit_EPD):
|
|
"""driver class for Adafruit IL91874 ePaper display breakouts"""
|
|
|
|
# pylint: disable=too-many-arguments
|
|
def __init__(
|
|
self, width, height, spi, *, cs_pin, dc_pin, sramcs_pin, rst_pin, busy_pin
|
|
):
|
|
super().__init__(
|
|
width, height, spi, cs_pin, dc_pin, sramcs_pin, rst_pin, busy_pin
|
|
)
|
|
|
|
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)
|
|
# since we have *two* framebuffers - one for red and one for black
|
|
# we dont subclass but manage manually
|
|
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)
|
|
self._single_byte_tx = True
|
|
|
|
def begin(self, reset=True):
|
|
"""Begin communication with the display and set basic settings"""
|
|
if reset:
|
|
self.hardware_reset()
|
|
|
|
self.power_down()
|
|
|
|
def busy_wait(self):
|
|
"""Wait for display to be done with current task, either by polling the
|
|
busy pin, or pausing"""
|
|
if self._busy:
|
|
while not self._busy.value:
|
|
time.sleep(0.01)
|
|
else:
|
|
time.sleep(0.5)
|
|
|
|
def power_up(self):
|
|
"""Power up the display in preparation for writing RAM and updating"""
|
|
self.hardware_reset()
|
|
time.sleep(0.2)
|
|
self.command(_IL91874_POWER_ON)
|
|
self.busy_wait()
|
|
|
|
self.command(_IL91874_PANEL_SETTING, bytearray([0xAF]))
|
|
self.command(_IL91874_PLL, bytearray([0x3A]))
|
|
self.command(_IL91874_POWER_SETTING, bytearray([0x03, 0x00, 0x2B, 0x2B, 0x09]))
|
|
self.command(_IL91874_BOOSTER_SOFT_START, bytearray([0x07, 0x07, 0x17]))
|
|
|
|
self.command(0xF8, bytearray([0x60, 0xA5])) # mystery command in example code
|
|
self.command(0xF8, bytearray([0x89, 0xA5])) # mystery command in example code
|
|
self.command(0xF8, bytearray([0x90, 0x00])) # mystery command in example code
|
|
self.command(0xF8, bytearray([0x93, 0xA2])) # mystery command in example code
|
|
self.command(0xF8, bytearray([0x73, 0x41])) # mystery command in example code
|
|
|
|
self.command(_IL91874_VCM_DC_SETTING, bytearray([0x12]))
|
|
self.command(_IL91874_CDI, bytearray([0x87]))
|
|
|
|
# Look Up Tables
|
|
self.command(_IL91874_LUT1, _LUT_VCOMDC)
|
|
self.command(_IL91874_LUTWW, _LUT_WW)
|
|
self.command(_IL91874_LUTBW, _LUT_BW)
|
|
self.command(_IL91874_LUTWB, _LUT_WB)
|
|
self.command(_IL91874_LUTBB, _LUT_BB)
|
|
|
|
_b0 = (self._width >> 8) & 0xFF
|
|
_b1 = self._width & 0xFF
|
|
_b2 = (self._height >> 8) & 0xFF
|
|
_b3 = self._height & 0xFF
|
|
self.command(_IL91874_RESOLUTION, bytearray([_b0, _b1, _b2, _b3]))
|
|
self.command(_IL91874_PDRF, bytearray([0x00]))
|
|
|
|
def power_down(self):
|
|
"""Power down the display - required when not actively displaying!"""
|
|
self.command(_IL91874_POWER_OFF, bytearray([0x17]))
|
|
self.busy_wait()
|
|
|
|
if self._rst: # Only deep sleep if we can get out of it
|
|
self.command(_IL91874_DEEP_SLEEP, bytearray([0xA5]))
|
|
|
|
def update(self):
|
|
"""Update the display from internal memory"""
|
|
self.command(_IL91874_DISPLAY_REFRESH)
|
|
self.busy_wait()
|
|
if not self._busy:
|
|
time.sleep(16) # wait 16 seconds
|
|
|
|
def write_ram(self, index):
|
|
"""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(_IL91874_DTM1, end=False)
|
|
if index == 1:
|
|
return self.command(_IL91874_DTM2, end=False)
|
|
raise RuntimeError("RAM index must be 0 or 1")
|
|
|
|
def set_ram_address(self, x, y): # pylint: disable=unused-argument, no-self-use
|
|
"""Set the RAM address location, not used on this chipset but required by
|
|
the superclass"""
|
|
return # on this chip it does nothing
|