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drivers_full.py
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drivers_full.py
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# Copyright (c) 2018 Jouko Strömmer
# Copyright (c) 2017 Waveshare
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <https://www.gnu.org/licenses/>.
from abc import abstractmethod
from papertty.drivers.drivers_base import WaveshareEPD
class WaveshareFull(WaveshareEPD):
"""Base class for displays that don't support partial refresh."""
AUTO_MEASUREMENT_VCOM = 0x80
BOOSTER_SOFT_START = 0x06
DATA_START_TRANSMISSION_1 = 0x10
DATA_STOP = 0x11
DEEP_SLEEP = 0x07
DISPLAY_REFRESH = 0x12
LOW_POWER_DETECTION = 0x51
LUT_FOR_VCOM = 0x20
PANEL_SETTING = 0x00
PLL_CONTROL = 0x30
POWER_OFF = 0x02
POWER_OFF_SEQUENCE_SETTING = 0x03
POWER_ON = 0x04
POWER_ON_MEASURE = 0x05
POWER_SETTING = 0x01
TCON_SETTING = 0x60
TEMPERATURE_SENSOR_COMMAND = 0x40
TEMPERATURE_SENSOR_READ = 0x43
TEMPERATURE_SENSOR_WRITE = 0x42
VCOM_AND_DATA_INTERVAL_SETTING = 0x50
def __init__(self, **kwargs):
super().__init__(**kwargs)
self.supports_partial = False
self.colors = 2
self.lut = None
self.supports_1bpp = False
self.enable_1bpp = False
self.align_1bpp_width = False
self.align_1bpp_height = False
self.supports_multi_draw = False
def wait_until_idle(self):
while self.digital_read(self.BUSY_PIN) == 0: # 0: busy, 1: idle
self.delay_ms(100)
@abstractmethod
def display_frame(self, frame_buffer, *args):
"""Accept more than one frame buffer since some displays use two"""
pass
@abstractmethod
def init(self, **kwargs):
pass
def scrub(self, fillsize=16):
"""Scrub display - this module does not support partial refresh: fillsize is ignored"""
super().scrub(self.width)
def draw(self, x, y, image):
"""Display an image - this module does not support partial refresh: x, y are ignored"""
self.display_frame(self.get_frame_buffer(image))
def get_frame_buffer(self, image, reverse=False):
buf = [0xFF if reverse else 0x00] * int(self.width * self.height / 8)
# Set buffer to value of Python Imaging Library image.
# Image must be in mode 1.
image_monocolor = image.convert('1')
imwidth, imheight = image_monocolor.size
if imwidth != self.width or imheight != self.height:
raise ValueError('Image must be same dimensions as display: required ({0}x{1}), got ({2}x{3})'
.format(self.width, self.height, imwidth, imheight))
pixels = image_monocolor.load()
for y in range(self.height):
for x in range(self.width):
# Set the bits for the column of pixels at the current position.
if reverse:
if pixels[x, y] == 0:
buf[int((x + y * self.width) / 8)] &= ~(0x80 >> (x % 8))
else:
if pixels[x, y] != 0:
buf[int((x + y * self.width) / 8)] |= (0x80 >> (x % 8))
return buf
class EPD2in7(WaveshareFull):
"""Waveshare 2.7" - monochrome"""
# EPD2IN7 commands
ACTIVE_PROGRAM = 0xA1
DATA_START_TRANSMISSION_2 = 0x13
LUT_BLACK_TO_BLACK = 0x24
LUT_BLACK_TO_WHITE = 0x22
LUT_WHITE_TO_BLACK = 0x23
LUT_WHITE_TO_WHITE = 0x21
PARTIAL_DATA_START_TRANSMISSION_1 = 0x14
PARTIAL_DATA_START_TRANSMISSION_2 = 0x15
PARTIAL_DISPLAY_REFRESH = 0x16
PROGRAM_MODE = 0xA0
READ_OTP_DATA = 0xA2
SOURCE_AND_GATE_START_SETTING = 0x62
TCON_RESOLUTION = 0x61
TEMPERATURE_SENSOR_CALIBRATION = 0x41
VCM_DC_SETTING_REGISTER = 0x82
VCOM_VALUE = 0x81
def __init__(self):
super().__init__(name='2.7" BW', width=176, height=264)
lut_vcom_dc = [
0x00, 0x00,
0x00, 0x0F, 0x0F, 0x00, 0x00, 0x05,
0x00, 0x32, 0x32, 0x00, 0x00, 0x02,
0x00, 0x0F, 0x0F, 0x00, 0x00, 0x05,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
]
# R21H
lut_ww = [
0x50, 0x0F, 0x0F, 0x00, 0x00, 0x05,
0x60, 0x32, 0x32, 0x00, 0x00, 0x02,
0xA0, 0x0F, 0x0F, 0x00, 0x00, 0x05,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
]
# R22H r
lut_bw = [
0x50, 0x0F, 0x0F, 0x00, 0x00, 0x05,
0x60, 0x32, 0x32, 0x00, 0x00, 0x02,
0xA0, 0x0F, 0x0F, 0x00, 0x00, 0x05,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
]
# R24H b
lut_bb = [
0xA0, 0x0F, 0x0F, 0x00, 0x00, 0x05,
0x60, 0x32, 0x32, 0x00, 0x00, 0x02,
0x50, 0x0F, 0x0F, 0x00, 0x00, 0x05,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
]
# R23H w
lut_wb = [
0xA0, 0x0F, 0x0F, 0x00, 0x00, 0x05,
0x60, 0x32, 0x32, 0x00, 0x00, 0x02,
0x50, 0x0F, 0x0F, 0x00, 0x00, 0x05,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
]
def init(self, **kwargs):
if self.epd_init() != 0:
return -1
# EPD hardware init start
self.reset()
self.send_command(self.POWER_SETTING)
self.send_data(0x03) # VDS_EN, VDG_EN
self.send_data(0x00) # VCOM_HV, VGHL_LV[1], VGHL_LV[0]
self.send_data(0x2b) # VDH
self.send_data(0x2b) # VDL
self.send_data(0x09) # VDHR
self.send_command(self.BOOSTER_SOFT_START)
self.send_data(0x07)
self.send_data(0x07)
self.send_data(0x17)
# Power optimization
self.send_command(0xF8)
self.send_data(0x60)
self.send_data(0xA5)
# Power optimization
self.send_command(0xF8)
self.send_data(0x89)
self.send_data(0xA5)
# Power optimization
self.send_command(0xF8)
self.send_data(0x90)
self.send_data(0x00)
# Power optimization
self.send_command(0xF8)
self.send_data(0x93)
self.send_data(0x2A)
# Power optimization
self.send_command(0xF8)
self.send_data(0xA0)
self.send_data(0xA5)
# Power optimization
self.send_command(0xF8)
self.send_data(0xA1)
self.send_data(0x00)
# Power optimization
self.send_command(0xF8)
self.send_data(0x73)
self.send_data(0x41)
self.send_command(self.PARTIAL_DISPLAY_REFRESH)
self.send_data(0x00)
self.send_command(self.POWER_ON)
self.wait_until_idle()
self.send_command(self.PANEL_SETTING)
self.send_data(0xAF) # KW-BF KWR-AF BWROTP 0f
self.send_command(self.PLL_CONTROL)
self.send_data(0x3A) # 3A 100HZ 29 150Hz 39 200HZ 31 171HZ
self.send_command(self.VCM_DC_SETTING_REGISTER)
self.send_data(0x12)
self.delay_ms(2)
self.set_lut()
# EPD hardware init end
return 0
def set_lut(self):
self.send_command(self.LUT_FOR_VCOM) # vcom
for count in range(0, 44):
self.send_data(self.lut_vcom_dc[count])
self.send_command(self.LUT_WHITE_TO_WHITE) # ww --
for count in range(0, 42):
self.send_data(self.lut_ww[count])
self.send_command(self.LUT_BLACK_TO_WHITE) # bw r
for count in range(0, 42):
self.send_data(self.lut_bw[count])
self.send_command(self.LUT_WHITE_TO_BLACK) # wb w
for count in range(0, 42):
self.send_data(self.lut_bb[count])
self.send_command(self.LUT_BLACK_TO_BLACK) # bb b
for count in range(0, 42):
self.send_data(self.lut_wb[count])
def display_frame(self, frame_buffer, *args):
if frame_buffer:
self.send_command(self.DATA_START_TRANSMISSION_1)
self.delay_ms(2)
for i in range(0, int(self.width * self.height / 8)):
self.send_data(0xFF)
self.delay_ms(2)
self.send_command(self.DATA_START_TRANSMISSION_2)
self.delay_ms(2)
for i in range(0, int(self.width * self.height / 8)):
self.send_data(frame_buffer[i])
self.delay_ms(2)
self.send_command(self.DISPLAY_REFRESH)
self.wait_until_idle()
# After this command is transmitted, the chip would enter the deep-sleep
# mode to save power. The deep sleep mode would return to standby by
# hardware reset. The only one parameter is a check code, the command would
# be executed if check code = 0xA5.
# Use EPD::Reset() to awaken and use EPD::Init() to initialize.
def sleep(self):
self.send_command(self.DEEP_SLEEP)
self.delay_ms(2)
self.send_data(0xa5)
class EPD3in7(WaveshareFull):
"""Waveshare 3.7" - monochrome"""
def __init__(self):
super().__init__(name='3.7" BW', width=280, height=480)
# The 3.7" display hardware supports B/W and 4-shade grayscale modes, but the
# grayscale mode is not yet implemented here. Reference code in Waveshare's repo:
# https://github.com/waveshare/e-Paper/blob/master/RaspberryPi_JetsonNano/python/lib/waveshare_epd/epd3in7.py
# Updating the screen with partial refresh takes approximately 600-900 ms. It is
# also not yet implemented here. Reference code in Waveshare's repo:
# https://github.com/waveshare/e-Paper/blob/master/RaspberryPi_JetsonNano/c/lib/e-Paper/EPD_3in7.c#L549
lut_1Gray_GC = [
0x2A,0x05,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x05,0x2A,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x2A,0x15,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x05,0x0A,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x02,0x03,0x0A,0x00,0x02,0x06,0x0A,0x05,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x22,0x22,0x22,0x22,0x22
]
lut_1Gray_DU = [
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x01,0x2A,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x0A,0x55,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x05,0x05,0x00,0x05,0x03,0x05,0x05,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x22,0x22,0x22,0x22,0x22
]
lut_1Gray_A2 = [
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x0A,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x05,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x03,0x05,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x22,0x22,0x22,0x22,0x22
]
def wait_until_idle(self):
while self.digital_read(self.BUSY_PIN) == 1: # 0: idle, 1: busy
self.delay_ms(10)
def init(self, **kwargs):
if self.epd_init() != 0:
return -1
# EPD hardware init start
self.reset()
self.send_command(0x12)
self.delay_ms(300)
self.send_command(0x46)
self.send_data(0xF7)
self.wait_until_idle()
self.send_command(0x47)
self.send_data(0xF7)
self.wait_until_idle()
self.send_command(0x01) # setting gaet number
self.send_data_multi([0xDF,0x01,0x00])
self.send_command(0x03) # set gate voltage
self.send_data(0x00)
self.send_command(0x04) # set source voltage
self.send_data_multi([0x41,0xA8,0x32])
self.send_command(0x11) # set data entry sequence
self.send_data(0x03)
self.send_command(0x3C) # set border
self.send_data(0x00)
self.send_command(0x0C) # set booster strength
self.send_data_multi([0xAE,0xC7,0xC3,0xC0,0xC0])
self.send_command(0x18) # set internal sensor on
self.send_data(0x80)
self.send_command(0x2C) # set vcom value
self.send_data(0x44)
self.send_command(0x37) # set display option, these setting turn on previous function
#can switch 1 gray or 4 gray
#4gray not currently implemented
self.send_data_multi([0x00,0xFF,0xFF,0xFF,0xFF,0x4F,0xFF,0xFF,0xFF,0xFF])
self.send_command(0x44) # setting X direction start/end position of RAM
self.send_data_multi([0x00,0x00,0x17,0x01])
self.send_command(0x45) # setting Y direction start/end position of RAM
self.send_data_multi([0x00,0x00,0xDF,0x01])
self.send_command(0x22) # Display Update Control 2
self.send_data(0xCF)
self.load_lut(self.lut_1Gray_A2)
return 0
def load_lut(self, lut):
self.send_command(0x32)
self.send_data_multi(lut)
def display_frame(self, frame_buffer, *args):
if frame_buffer:
self.send_command(0x4E)
self.send_data_multi([0x00,0x00])
self.send_command(0x4F)
self.send_data_multi([0x00,0x00])
self.send_command(0x24)
self.send_data_multi(frame_buffer)
self.send_command(0x20)
self.wait_until_idle()
def draw(self, x, y, image):
"""Display an image - this module does not support partial refresh: x, y are ignored"""
frame_buffer = self.pack_image(image)
self.display_frame(frame_buffer, x, y)
def display_partial(self, frame_buffer, x_start, y_start, x_end, y_end):
"""Partial refresh has been added, but it is not turned on.
This is because, while it does work, there are weird visual artifacts.
Following the waveshare docs and experimenting with various settings has
done nothing.
The only thing which gets rid of the artifacts is forcing a clear,
or sending command 0x20 twice, both of which are undesirable.
I suspect that this is a bug with the 3in7 device, considering that partial
refresh is absent from Waveshare's python examples, and other projects
supporting this panel have omitted the partial refresh function.
"""
width = ((x_end-x_start)/8) if ((x_end-x_start)%8 == 0) else ((x_end-x_start)/8+1)
height = y_end - y_start
x_end -= 1
y_end -= 1
self.send_command(0x44)
self.send_data(x_start % 256)
self.send_data(x_start // 256)
self.send_data(x_end % 256)
self.send_data(x_end // 256)
self.send_command(0x45)
self.send_data(y_start % 256)
self.send_data(y_start // 256)
self.send_data(y_end % 256)
self.send_data(y_end // 256)
self.send_command(0x4E) # SET_RAM_X_ADDRESS_COUNTER
self.send_data(x_start % 256)
self.send_command(0x4F) # SET_RAM_Y_ADDRESS_COUNTER
self.send_data(y_start % 256)
self.send_data(y_start // 256)
self.send_command(0x24)
self.send_data_multi(frame_buffer)
self.load_lut(self.lut_1Gray_A2)
self.send_command(0x20)
self.wait_until_idle()
def pack_image(self, image):
"""Packs a PIL image for transfer over SPI to the driver board."""
#Load image into a frame buffer
frame_buffer = list(image.getdata())
#Step is the number of input bytes (bytes from the image) we
#can pack into a single byte of the output bytes (packed buffer).
#This is currently hard-coded to 8, because only 1bpp mode is supported.
step = 8
#Set the size of packed_buffer to be the length of the
#frame buffer (total input bytes) divided by a step
#(input bytes needed per packed byte).
packed_buffer = [0x00] * (len(frame_buffer) // step)
#Step through the frame buffer and pack its bytes
#into packed_buffer.
for i in range(0, len(frame_buffer), step):
self.pack_1bpp(packed_buffer, i // step, frame_buffer[i:i+step])
return packed_buffer
def pack_1bpp(self, packed_buffer, i, eightBytes):
"""Pack an image in 1bpp format.
This only works for black and white images.
This code would look nicer with a loop, but using bitwise operators
like this is significantly faster. So the ugly code stays ;)
"""
packed_buffer[i] = \
(128 if eightBytes[0] else 0) | \
(64 if eightBytes[1] else 0) | \
(32 if eightBytes[2] else 0) | \
(16 if eightBytes[3] else 0) | \
(8 if eightBytes[4] else 0) | \
(4 if eightBytes[5] else 0) | \
(2 if eightBytes[6] else 0) | \
(1 if eightBytes[7] else 0)
def sleep(self):
self.send_command(0X50) # DEEP_SLEEP_MODE
self.send_data(0xf7)
self.send_command(0X02) #power off
self.send_command(0X07) #deep sleep
self.send_data(0xA5)
def reset(self):
self.digital_write(self.RST_PIN, 1)
self.delay_ms(200)
self.digital_write(self.RST_PIN, 0)
self.delay_ms(5)
self.digital_write(self.RST_PIN, 1)
self.delay_ms(200)
class EPD7in5(WaveshareFull):
"""Waveshare 7.5" - monochrome"""
IMAGE_PROCESS = 0x13
LUT_BLUE = 0x21
LUT_GRAY_1 = 0x23
LUT_GRAY_2 = 0x24
LUT_RED_0 = 0x25
LUT_RED_1 = 0x26
LUT_RED_2 = 0x27
LUT_RED_3 = 0x28
LUT_WHITE = 0x22
LUT_XON = 0x29
READ_VCOM_VALUE = 0x81
REVISION = 0x70
SPI_FLASH_CONTROL = 0x65
TCON_RESOLUTION = 0x61
TEMPERATURE_CALIBRATION = 0x41
VCM_DC_SETTING = 0x82
def __init__(self):
super().__init__(name='7.5" BW', width=640, height=384)
def init(self, **kwargs):
if self.epd_init() != 0:
return -1
self.reset()
self.send_command(self.POWER_SETTING)
self.send_data(0x37)
self.send_data(0x00)
self.send_command(self.PANEL_SETTING)
self.send_data(0xCF)
self.send_data(0x08)
self.send_command(self.BOOSTER_SOFT_START)
self.send_data(0xc7)
self.send_data(0xcc)
self.send_data(0x28)
self.send_command(self.POWER_ON)
self.wait_until_idle()
self.send_command(self.PLL_CONTROL)
self.send_data(0x3c)
self.send_command(self.TEMPERATURE_CALIBRATION)
self.send_data(0x00)
self.send_command(self.VCOM_AND_DATA_INTERVAL_SETTING)
self.send_data(0x77)
self.send_command(self.TCON_SETTING)
self.send_data(0x22)
self.send_command(self.TCON_RESOLUTION)
self.send_data(0x02) # source 640
self.send_data(0x80)
self.send_data(0x01) # gate 384
self.send_data(0x80)
self.send_command(self.VCM_DC_SETTING)
self.send_data(0x1E) # decide by LUT file
self.send_command(0xe5) # FLASH MODE
self.send_data(0x03)
def display_frame(self, frame_buffer, *args):
self.send_command(self.DATA_START_TRANSMISSION_1)
for i in range(0, 30720):
temp1 = frame_buffer[i]
j = 0
while j < 8:
if temp1 & 0x80:
temp2 = 0x03
else:
temp2 = 0x00
temp2 = (temp2 << 4) & 0xFF
temp1 = (temp1 << 1) & 0xFF
j += 1
if temp1 & 0x80:
temp2 |= 0x03
else:
temp2 |= 0x00
temp1 = (temp1 << 1) & 0xFF
self.send_data(temp2)
j += 1
self.send_command(self.DISPLAY_REFRESH)
self.delay_ms(100)
self.wait_until_idle()
def sleep(self):
self.send_command(self.POWER_OFF)
self.wait_until_idle()
self.send_command(self.DEEP_SLEEP)
self.send_data(0xa5)
class EPD7in5v2(WaveshareFull):
"""WaveShare 7.5" GDEW075T7 - monochrome"""
DATA_START_TRANSMISSION_2 = 0x13
LUT_WHITE_TO_WHITE = 0x21
LUT_BLACK_TO_WHITE = 0x22
LUT_WHITE_TO_BLACK = 0x23
LUT_BLACK_TO_BLACK = 0x24
READ_VCOM_VALUE = 0x81
# REVISION = 0x70
# SPI_FLASH_CONTROL = 0x65
# TCON_RESOLUTION = 0x61
TEMPERATURE_CALIBRATION = 0x41 # Assuming TEMPERATURE_SENSOR_SELECTION
VCM_DC_SETTING = 0x82
def __init__(self):
super().__init__(name='7.5" v2 (GDEW075T7) BW', width=800, height=480)
def init(self, **kwargs):
if self.epd_init() != 0:
return -1
self.reset()
print("Starting command block 1") # runs fine
# from line 92 of epd7in5_V2.py
self.send_command(0x06) # btst
self.send_data(0x17)
self.send_data(0x17)
self.send_data(0x28) # If an exception is displayed, try using 0x38
self.send_data(0x17)
print("Starting command block 2") # runs fine
self.send_command(self.POWER_SETTING)
self.send_data(0x07) # VDS_EN, VDG_EN
self.send_data(0x07) # VCOM_HV, VGHL_LV[1], VGHL_LV[0]
self.send_data(0x3f) # VDH
self.send_data(0x3f) # VDL
print("Starting command block 3")
print("Sending power on")
self.send_command(self.POWER_ON)
# self.delay_ms(200) # 200ms delay
print("Waiting") # Hangs here. Never goes idle?
self.wait_until_idle()
print("Starting command block 4")
self.send_command(self.PANEL_SETTING)
self.send_data(0x1f) # KW-3f KWR-2F BWROTP 0f BWOTP 1f
print("Starting command block 5")
# from line 111 of epd7in5_V2.py
self.send_command(0x61) #tres
self.send_data(0x03) #source 800
self.send_data(0x20)
self.send_data(0x01) #gate 480
self.send_data(0xE0)
print("Starting command block 6")
self.send_command(0x15)
self.send_data(0x00)
print("Starting command block 7")
self.send_command(self.VCOM_AND_DATA_INTERVAL_SETTING)
self.send_data(0x10)
self.send_data(0x07)
print("Starting command block 8")
self.send_command(self.TCON_SETTING)
self.send_data(0x22)
print('Init finished.')
def display_frame(self, frame_buffer, *args):
if frame_buffer:
self.send_command(self.DATA_START_TRANSMISSION_1)
self.delay_ms(2)
for i in range(0, int(self.width * self.height / 8)):
self.send_data(0xFF)
self.delay_ms(2)
self.send_command(self.DATA_START_TRANSMISSION_2)
self.delay_ms(2)
for i in range(0, int(self.width * self.height / 8)):
self.send_data(~frame_buffer[i])
self.delay_ms(2)
self.send_command(self.DISPLAY_REFRESH)
self.delay_ms(100)
self.wait_until_idle()
def sleep(self):
'''
After this command is transmitted, the chip would enter the
deep-sleep mode to save power.
The deep sleep mode would return to standby by hardware reset.
The only one parameter is a check code, the command would be
executed if check code = 0xA5.
You can use Epd::Reset() to awaken or Epd::Init() to initialize
'''
self.send_command(self.POWER_OFF)
self.wait_until_idle()
self.send_command(self.DEEP_SLEEP)
self.send_data(0xA5)
def reset(self):
"""
Mirroring behaviour in reference implementation:
https://github.com/waveshare/e-Paper/blob/702def06bcb75983c98b0f9d25d43c552c248eb0/RaspberryPi%26JetsonNano/python/lib/waveshare_epd/epd7in5_V2.py#L48-L54
The earlier implementation of `reset` inherited from `WaveshareFull` did not work with some units
(`init` hanged at `wait_until_idle` after the `POWER_ON` command was sent).
A quick scan of the other implementations indicates that the reset varies across devices (it's unclear
whether there is good reason for device specific differences or if the developer was just being inconsistent...)
e.g. significantly different delay times:
https://github.com/waveshare/e-Paper/blob/702def06bcb75983c98b0f9d25d43c552c248eb0/RaspberryPi%26JetsonNano/python/lib/waveshare_epd/epd1in54c.py#L46-L52
"""
# Deliberately importing here to achieve same fail-on-use import behaviour as in `drivers_base.py`
# import RPi.GPIO as GPIO
delay_1 = 20
delay_2 = 2
delay_3 = 20
# print the values of delay_1, delay_2, delay_3
print(f"delay_1: {delay_1}, delay_2: {delay_2}, delay_3: {delay_3}")
self.digital_write(self.RST_PIN, 1)
self.delay_ms(delay_1) # reduced to 20 to match ws code
self.digital_write(self.RST_PIN, 0)
self.delay_ms(delay_2) # increased to 4 to match waveshare code
self.digital_write(self.RST_PIN, 1)
self.delay_ms(delay_3)
def wait_until_idle(self):
"""
Mirroring behaviour in reference implementation (i.e. differently to other implementations, we send command 0x71
and poll without sleep):
https://github.com/waveshare/e-Paper/blob/702def06bcb75983c98b0f9d25d43c552c248eb0/RaspberryPi%26JetsonNano/python/lib/waveshare_epd/epd7in5_V2.py#L68-L75
"""
self.send_command(0x71)
count = 0
print("Entering while loop....")
print(f"Busy pin is {self.digital_read(self.BUSY_PIN)}")
print(f"Count is {count}")
while (self.digital_read(self.BUSY_PIN) == 0) and (count < 100): # 0: busy, 1: idle
print(f"Busy pin is {self.digital_read(self.BUSY_PIN)}")
self.send_command(0x71)
print("Sending 0x71")
self.delay_ms(20) # adjusting this to 200 ms to match waveshare code
# count += 1
print(f"Count is {count}")
# functions from EPD2in13v4 driver (drivers_partial.py)
# def send_command(self, command):
# import RPi.GPIO as GPIO
# print("Using New Func!")
# self.digital_write(self.CS_PIN, GPIO.LOW)
# super().send_command(command)
# self.digital_write(self.CS_PIN, GPIO.HIGH)
# def send_data(self, data):
# import RPi.GPIO as GPIO
# print("Using New Func!")
# self.digital_write(self.CS_PIN, GPIO.LOW)
# super().send_data(data)
# self.digital_write(self.CS_PIN, GPIO.HIGH)
# def send_data_multi(self, data):
# import RPi.GPIO as GPIO
# print("Using WS New Func!")
# self.digital_write(self.CS_PIN, GPIO.LOW)
# super().send_data_multi(data)
# self.digital_write(self.CS_PIN, GPIO.HIGH)
# functions from waveshare driver
def send_command(self, command):
#print("Using WS New Func!")
self.digital_write(self.DC_PIN, 0)
self.digital_write(self.CS_PIN, 0)
self.spi_writebyte([command])
self.digital_write(self.CS_PIN, 1)
def send_data(self, data):
#print("Using WS New Func!")
self.digital_write(self.DC_PIN, 1)
self.digital_write(self.CS_PIN, 0)
self.spi_writebyte([data])
self.digital_write(self.CS_PIN, 1)
def send_data_multi(self, data):
#print("Using WS New Func!")
self.digital_write(self.DC_PIN, 1)
self.digital_write(self.CS_PIN, 0)
self.SPI.writebytes2(data)
self.digital_write(self.CS_PIN, 1)
def spi_writebyte(self, data):
self.SPI.writebytes(data)