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epd2in7b_fast_lut.py
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##
# @filename : epd2in7b.py
# @brief : Implements for Dual-color e-paper library
# @author : Yehui from Waveshare
#
# Copyright (C) Waveshare July 31 2017
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documnetation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS OR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
#
# A modified version of original epd2in7b.py library - LUT tables has been modified
# so the refresh is about 10 times faster.
# https://github.com/pskowronek/epaper-clock-and-more
import epdif
from PIL import Image
from PIL import ImageDraw
import RPi.GPIO as GPIO
# Display resolution
EPD_WIDTH = 176
EPD_HEIGHT = 264
# EPD2IN7B commands
PANEL_SETTING = 0x00
POWER_SETTING = 0x01
POWER_OFF = 0x02
POWER_OFF_SEQUENCE_SETTING = 0x03
POWER_ON = 0x04
POWER_ON_MEASURE = 0x05
BOOSTER_SOFT_START = 0x06
DEEP_SLEEP = 0x07
DATA_START_TRANSMISSION_1 = 0x10
DATA_STOP = 0x11
DISPLAY_REFRESH = 0x12
DATA_START_TRANSMISSION_2 = 0x13
PARTIAL_DATA_START_TRANSMISSION_1 = 0x14
PARTIAL_DATA_START_TRANSMISSION_2 = 0x15
PARTIAL_DISPLAY_REFRESH = 0x16
LUT_FOR_VCOM = 0x20
LUT_WHITE_TO_WHITE = 0x21
LUT_BLACK_TO_WHITE = 0x22
LUT_WHITE_TO_BLACK = 0x23
LUT_BLACK_TO_BLACK = 0x24
PLL_CONTROL = 0x30
TEMPERATURE_SENSOR_COMMAND = 0x40
TEMPERATURE_SENSOR_CALIBRATION = 0x41
TEMPERATURE_SENSOR_WRITE = 0x42
TEMPERATURE_SENSOR_READ = 0x43
VCOM_AND_DATA_INTERVAL_SETTING = 0x50
LOW_POWER_DETECTION = 0x51
TCON_SETTING = 0x60
TCON_RESOLUTION = 0x61
SOURCE_AND_GATE_START_SETTING = 0x62
GET_STATUS = 0x71
AUTO_MEASURE_VCOM = 0x80
VCOM_VALUE = 0x81
VCM_DC_SETTING_REGISTER = 0x82
PROGRAM_MODE = 0xA0
ACTIVE_PROGRAM = 0xA1
READ_OTP_DATA = 0xA2
# Display orientation
ROTATE_0 = 0
ROTATE_90 = 1
ROTATE_180 = 2
ROTATE_270 = 3
class EPD:
def __init__(self):
self.reset_pin = epdif.RST_PIN
self.dc_pin = epdif.DC_PIN
self.busy_pin = epdif.BUSY_PIN
self.width = EPD_WIDTH
self.height = EPD_HEIGHT
self.rotate = ROTATE_0
lut_vcom_dc = [
0x00 ,0x00,
0x00 ,0x1A ,0x1A ,0x00 ,0x00 ,0x01,
0x00 ,0x0A ,0x0A ,0x00 ,0x00 ,0x01,
0x00 ,0x0E ,0x01 ,0x0E ,0x01 ,0x01,
0x00 ,0x0A ,0x0A ,0x00 ,0x00 ,0x01,
0x00 ,0x04 ,0x10 ,0x00 ,0x00 ,0x01,
0x00 ,0x03 ,0x0E ,0x00 ,0x00 ,0x09,
0x00 ,0x23 ,0x00 ,0x00 ,0x00 ,0x01
]
# R21H
lut_ww = [
0x90 ,0x1A ,0x1A ,0x00 ,0x00 ,0x01,
0x40 ,0x0A ,0x0A ,0x00 ,0x00 ,0x01,
0x84 ,0x0E ,0x01 ,0x0E ,0x01 ,0x01,
0x80 ,0x0A ,0x0A ,0x00 ,0x00 ,0x01,
0x00 ,0x04 ,0x10 ,0x00 ,0x00 ,0x01,
0x00 ,0x03 ,0x0E ,0x00 ,0x00 ,0x09,
0x00 ,0x23 ,0x00 ,0x00 ,0x00 ,0x01
]
# R22H r
lut_bw = [
0xA0 ,0x1A ,0x1A ,0x00 ,0x00 ,0x01,
0x00 ,0x0A ,0x0A ,0x00 ,0x00 ,0x01,
0x84 ,0x0E ,0x01 ,0x0E ,0x01 ,0x01,
0x90 ,0x0A ,0x0A ,0x00 ,0x00 ,0x01,
0xB0 ,0x04 ,0x10 ,0x00 ,0x00 ,0x01,
0xB0 ,0x03 ,0x0E ,0x00 ,0x00 ,0x09,
0xC0 ,0x23 ,0x00 ,0x00 ,0x00 ,0x01
]
# R23H w
lut_bb = [
0x90 ,0x1A ,0x1A ,0x00 ,0x00 ,0x01,
0x40 ,0x0A ,0x0A ,0x00 ,0x00 ,0x01,
0x84 ,0x0E ,0x01 ,0x0E ,0x01 ,0x01,
0x80 ,0x0A ,0x0A ,0x00 ,0x00 ,0x01,
0x00 ,0x04 ,0x10 ,0x00 ,0x00 ,0x01,
0x00 ,0x03 ,0x0E ,0x00 ,0x00 ,0x09,
0x00 ,0x23 ,0x00 ,0x00 ,0x00 ,0x01
]
# R24H b
lut_wb = [
0x90 ,0x1A ,0x1A ,0x00 ,0x00 ,0x01,
0x20 ,0x0A ,0x0A ,0x00 ,0x00 ,0x01,
0x84 ,0x0E ,0x01 ,0x0E ,0x01 ,0x01,
0x10 ,0x0A ,0x0A ,0x00 ,0x00 ,0x01,
0x00 ,0x04 ,0x10 ,0x00 ,0x00 ,0x01,
0x00 ,0x03 ,0x0E ,0x00 ,0x00 ,0x09,
0x00 ,0x23 ,0x00 ,0x00 ,0x00 ,0x01
]
def digital_write(self, pin, value):
epdif.epd_digital_write(pin, value)
def digital_read(self, pin):
return epdif.epd_digital_read(pin)
def delay_ms(self, delaytime):
epdif.epd_delay_ms(delaytime)
def send_command(self, command):
self.digital_write(self.dc_pin, GPIO.LOW)
# the parameter type is list but not int
# so use [command] instead of command
epdif.spi_transfer([command])
def send_data(self, data):
self.digital_write(self.dc_pin, GPIO.HIGH)
# the parameter type is list but not int
# so use [data] instead of data
epdif.spi_transfer([data])
def init(self):
if (epdif.epd_init() != 0):
return -1
self.reset()
self.send_command(POWER_ON)
self.wait_until_idle()
self.send_command(PANEL_SETTING)
self.send_data(0xaf) #KW-BF KWR-AF BWROTP 0f
self.send_command(PLL_CONTROL)
self.send_data(0x3a) #3A 100HZ 29 150Hz 39 200HZ 31 171HZ
self.send_command(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(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(0x73)
self.send_data(0x41)
self.send_command(VCM_DC_SETTING_REGISTER)
self.send_data(0x12)
self.send_command(VCOM_AND_DATA_INTERVAL_SETTING)
self.send_data(0x87) # define by OTP
self.set_lut()
self.send_command(PARTIAL_DISPLAY_REFRESH)
self.send_data(0x00)
return 0
def wait_until_idle(self):
while(self.digital_read(self.busy_pin) == 0): # 0: busy, 1: idle
self.delay_ms(100)
def reset(self):
self.digital_write(self.reset_pin, GPIO.LOW) # module reset
self.delay_ms(200)
self.digital_write(self.reset_pin, GPIO.HIGH)
self.delay_ms(200)
def set_lut(self):
self.send_command(LUT_FOR_VCOM) # vcom
for count in range(0, 44):
self.send_data(self.lut_vcom_dc[count])
self.send_command(LUT_WHITE_TO_WHITE) # ww --
for count in range(0, 42):
self.send_data(self.lut_ww[count])
self.send_command(LUT_BLACK_TO_WHITE) # bw r
for count in range(0, 42):
self.send_data(self.lut_bw[count])
self.send_command(LUT_WHITE_TO_BLACK) # wb w
for count in range(0, 42):
self.send_data(self.lut_bb[count])
self.send_command(LUT_BLACK_TO_BLACK) # bb b
for count in range(0, 42):
self.send_data(self.lut_wb[count])
def get_frame_buffer(self, image):
buf = [0xFF] * 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 \
({0}x{1}).' .format(self.width, self.height))
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 pixels[x, y] != 0:
buf[int((x + y * self.width) / 8)] &= ~(0x80 >> (int(x % 8)))
return buf
def display_frame(self, frame_buffer_black, frame_buffer_red):
self.send_command(TCON_RESOLUTION)
self.send_data(EPD_WIDTH >> 8)
self.send_data(EPD_WIDTH & 0xff) #176
self.send_data(EPD_HEIGHT >> 8)
self.send_data(EPD_HEIGHT & 0xff) #264
if (frame_buffer_black != None):
self.send_command(DATA_START_TRANSMISSION_1)
self.delay_ms(2)
for i in range(0, int(self.width * self.height / 8)):
self.send_data(frame_buffer_black[i])
self.delay_ms(2)
if (frame_buffer_red != None):
self.send_command(DATA_START_TRANSMISSION_2)
self.delay_ms(2)
for i in range(0, int(self.width * self.height / 8)):
self.send_data(frame_buffer_red[i])
self.delay_ms(2)
self.send_command(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(DEEP_SLEEP)
self.send_data(0xa5)
def set_rotate(self, rotate):
if (rotate == ROTATE_0):
self.rotate = ROTATE_0
self.width = EPD_WIDTH
self.height = EPD_HEIGHT
elif (rotate == ROTATE_90):
self.rotate = ROTATE_90
self.width = EPD_HEIGHT
self.height = EPD_WIDTH
elif (rotate == ROTATE_180):
self.rotate = ROTATE_180
self.width = EPD_WIDTH
self.height = EPD_HEIGHT
elif (rotate == ROTATE_270):
self.rotate = ROTATE_270
self.width = EPD_HEIGHT
self.height = EPD_WIDTH
def set_pixel(self, frame_buffer, x, y, colored):
if (x < 0 or x >= self.width or y < 0 or y >= self.height):
return
if (self.rotate == ROTATE_0):
self.set_absolute_pixel(frame_buffer, x, y, colored)
elif (self.rotate == ROTATE_90):
point_temp = x
x = EPD_WIDTH - y
y = point_temp
self.set_absolute_pixel(frame_buffer, x, y, colored)
elif (self.rotate == ROTATE_180):
x = EPD_WIDTH - x
y = EPD_HEIGHT- y
self.set_absolute_pixel(frame_buffer, x, y, colored)
elif (self.rotate == ROTATE_270):
point_temp = x
x = y
y = EPD_HEIGHT - point_temp
self.set_absolute_pixel(frame_buffer, x, y, colored)
def set_absolute_pixel(self, frame_buffer, x, y, colored):
# To avoid display orientation effects
# use EPD_WIDTH instead of self.width
# use EPD_HEIGHT instead of self.height
if (x < 0 or x >= EPD_WIDTH or y < 0 or y >= EPD_HEIGHT):
return
if (colored):
frame_buffer[int((x + y * EPD_WIDTH) / 8)] |= 0x80 >> (int(x % 8))
else:
frame_buffer[int((x + y * EPD_WIDTH) / 8)] &= ~(0x80 >> (int(x % 8)))
def draw_string_at(self, frame_buffer, x, y, text, font, colored):
image = Image.new('1', (self.width, self.height))
draw = ImageDraw.Draw(image)
draw.text((x, y), text, font = font, fill = 255)
# Set buffer to value of Python Imaging Library image.
# Image must be in mode 1.
pixels = image.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 pixels[x, y] != 0:
self.set_pixel(frame_buffer, x, y, colored)
def draw_line(self, frame_buffer, x0, y0, x1, y1, colored):
# Bresenham algorithm
dx = abs(x1 - x0)
sx = 1 if x0 < x1 else -1
dy = -abs(y1 - y0)
sy = 1 if y0 < y1 else -1
err = dx + dy
while((x0 != x1) and (y0 != y1)):
self.set_pixel(frame_buffer, x0, y0 , colored)
if (2 * err >= dy):
err += dy
x0 += sx
if (2 * err <= dx):
err += dx
y0 += sy
def draw_horizontal_line(self, frame_buffer, x, y, width, colored):
for i in range(x, x + width):
self.set_pixel(frame_buffer, i, y, colored)
def draw_vertical_line(self, frame_buffer, x, y, height, colored):
for i in range(y, y + height):
self.set_pixel(frame_buffer, x, i, colored)
def draw_rectangle(self, frame_buffer, x0, y0, x1, y1, colored):
min_x = x0 if x1 > x0 else x1
max_x = x1 if x1 > x0 else x0
min_y = y0 if y1 > y0 else y1
max_y = y1 if y1 > y0 else y0
self.draw_horizontal_line(frame_buffer, min_x, min_y, max_x - min_x + 1, colored)
self.draw_horizontal_line(frame_buffer, min_x, max_y, max_x - min_x + 1, colored)
self.draw_vertical_line(frame_buffer, min_x, min_y, max_y - min_y + 1, colored)
self.draw_vertical_line(frame_buffer, max_x, min_y, max_y - min_y + 1, colored)
def draw_filled_rectangle(self, frame_buffer, x0, y0, x1, y1, colored):
min_x = x0 if x1 > x0 else x1
max_x = x1 if x1 > x0 else x0
min_y = y0 if y1 > y0 else y1
max_y = y1 if y1 > y0 else y0
for i in range(min_x, max_x + 1):
self.draw_vertical_line(frame_buffer, i, min_y, max_y - min_y + 1, colored)
def draw_circle(self, frame_buffer, x, y, radius, colored):
# Bresenham algorithm
x_pos = -radius
y_pos = 0
err = 2 - 2 * radius
if (x >= self.width or y >= self.height):
return
while True:
self.set_pixel(frame_buffer, x - x_pos, y + y_pos, colored)
self.set_pixel(frame_buffer, x + x_pos, y + y_pos, colored)
self.set_pixel(frame_buffer, x + x_pos, y - y_pos, colored)
self.set_pixel(frame_buffer, x - x_pos, y - y_pos, colored)
e2 = err
if (e2 <= y_pos):
y_pos += 1
err += y_pos * 2 + 1
if(-x_pos == y_pos and e2 <= x_pos):
e2 = 0
if (e2 > x_pos):
x_pos += 1
err += x_pos * 2 + 1
if x_pos > 0:
break
def draw_filled_circle(self, frame_buffer, x, y, radius, colored):
# Bresenham algorithm
x_pos = -radius
y_pos = 0
err = 2 - 2 * radius
if (x >= self.width or y >= self.height):
return
while True:
self.set_pixel(frame_buffer, x - x_pos, y + y_pos, colored)
self.set_pixel(frame_buffer, x + x_pos, y + y_pos, colored)
self.set_pixel(frame_buffer, x + x_pos, y - y_pos, colored)
self.set_pixel(frame_buffer, x - x_pos, y - y_pos, colored)
self.draw_horizontal_line(frame_buffer, x + x_pos, y + y_pos, 2 * (-x_pos) + 1, colored)
self.draw_horizontal_line(frame_buffer, x + x_pos, y - y_pos, 2 * (-x_pos) + 1, colored)
e2 = err
if (e2 <= y_pos):
y_pos += 1
err += y_pos * 2 + 1
if(-x_pos == y_pos and e2 <= x_pos):
e2 = 0
if (e2 > x_pos):
x_pos += 1
err += x_pos * 2 + 1
if x_pos > 0:
break
### END OF FILE ###