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epd2in7.py
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epd2in7.py
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##
# @filename : epd2in7.py
# @brief : Implements for 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.
#
import epdif
from PIL import Image, ImageDraw, ImageFont
import RPi.GPIO as GPIO
# Display resolution
EPD_WIDTH = 176
EPD_HEIGHT = 264
# EPD2IN7 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
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
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 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
# EPD hardware init start
self.reset()
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(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(PARTIAL_DISPLAY_REFRESH)
self.send_data(0x00)
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(VCM_DC_SETTING_REGISTER)
self.send_data(0x12)
self.delay_ms(2)
self.set_lut()
# EPD hardware init end
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 = [0x00] * (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[(x + y * self.width) / 8] |= (0x80 >> (x % 8))
return buf
def display_frame(self, frame_buffer):
if (frame_buffer != None):
self.send_command(DATA_START_TRANSMISSION_1)
self.delay_ms(2)
for i in range(0, self.width * self.height / 8):
self.send_data(0xFF)
self.delay_ms(2)
self.send_command(DATA_START_TRANSMISSION_2)
self.delay_ms(2)
for i in range(0, self.width * self.height / 8):
self.send_data(frame_buffer[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.delay_ms(2)
self.send_data(0xa5)
### END OF FILE ###