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epd1in54.py
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epd1in54.py
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##
# @filename : epd1in54.py
# @brief : Implements for e-paper library
# @author : Yehui from Waveshare
#
# Copyright (C) Waveshare September 9 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
import Image
import RPi.GPIO as GPIO
# Display resolution
EPD_WIDTH = 200
EPD_HEIGHT = 200
# EPD1IN54 commands
DRIVER_OUTPUT_CONTROL = 0x01
BOOSTER_SOFT_START_CONTROL = 0x0C
GATE_SCAN_START_POSITION = 0x0F
DEEP_SLEEP_MODE = 0x10
DATA_ENTRY_MODE_SETTING = 0x11
SW_RESET = 0x12
TEMPERATURE_SENSOR_CONTROL = 0x1A
MASTER_ACTIVATION = 0x20
DISPLAY_UPDATE_CONTROL_1 = 0x21
DISPLAY_UPDATE_CONTROL_2 = 0x22
WRITE_RAM = 0x24
WRITE_VCOM_REGISTER = 0x2C
WRITE_LUT_REGISTER = 0x32
SET_DUMMY_LINE_PERIOD = 0x3A
SET_GATE_TIME = 0x3B
BORDER_WAVEFORM_CONTROL = 0x3C
SET_RAM_X_ADDRESS_START_END_POSITION = 0x44
SET_RAM_Y_ADDRESS_START_END_POSITION = 0x45
SET_RAM_X_ADDRESS_COUNTER = 0x4E
SET_RAM_Y_ADDRESS_COUNTER = 0x4F
TERMINATE_FRAME_READ_WRITE = 0xFF
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.lut = self.lut_full_update
lut_full_update = [
0x02, 0x02, 0x01, 0x11, 0x12, 0x12, 0x22, 0x22,
0x66, 0x69, 0x69, 0x59, 0x58, 0x99, 0x99, 0x88,
0x00, 0x00, 0x00, 0x00, 0xF8, 0xB4, 0x13, 0x51,
0x35, 0x51, 0x51, 0x19, 0x01, 0x00
]
lut_partial_update = [
0x10, 0x18, 0x18, 0x08, 0x18, 0x18, 0x08, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x13, 0x14, 0x44, 0x12,
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, lut):
if (epdif.epd_init() != 0):
return -1
# EPD hardware init start
self.lut = lut
self.reset()
self.send_command(DRIVER_OUTPUT_CONTROL)
self.send_data((EPD_HEIGHT - 1) & 0xFF)
self.send_data(((EPD_HEIGHT - 1) >> 8) & 0xFF)
self.send_data(0x00) # GD = 0 SM = 0 TB = 0
self.send_command(BOOSTER_SOFT_START_CONTROL)
self.send_data(0xD7)
self.send_data(0xD6)
self.send_data(0x9D)
self.send_command(WRITE_VCOM_REGISTER)
self.send_data(0xA8) # VCOM 7C
self.send_command(SET_DUMMY_LINE_PERIOD)
self.send_data(0x1A) # 4 dummy lines per gate
self.send_command(SET_GATE_TIME)
self.send_data(0x08) # 2us per line
self.send_command(DATA_ENTRY_MODE_SETTING)
self.send_data(0x03) # X increment Y increment
self.set_lut(self.lut)
# EPD hardware init end
return 0
def wait_until_idle(self):
while(self.digital_read(self.busy_pin) == 1): # 0: idle, 1: busy
self.delay_ms(100)
##
# @brief: module reset.
# often used to awaken the module in deep sleep,
##
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)
##
# @brief: set the look-up table register
##
def set_lut(self, lut):
self.lut = lut
self.send_command(WRITE_LUT_REGISTER)
# the length of look-up table is 30 bytes
for i in range(0, len(lut)):
self.send_data(self.lut[i])
##
# @brief: convert an image to a buffer
##
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
##
# @brief: put an image to the frame memory.
# this won't update the display.
##
def set_frame_memory(self, image, x, y):
if (image == None or x < 0 or y < 0):
return
image_monocolor = image.convert('1')
image_width, image_height = image_monocolor.size
# x point must be the multiple of 8 or the last 3 bits will be ignored
x = x & 0xF8
image_width = image_width & 0xF8
if (x + image_width >= self.width):
x_end = self.width - 1
else:
x_end = x + image_width - 1
if (y + image_height >= self.height):
y_end = self.height - 1
else:
y_end = y + image_height - 1
self.set_memory_area(x, y, x_end, y_end)
self.set_memory_pointer(x, y)
self.send_command(WRITE_RAM)
# send the image data
pixels = image_monocolor.load()
byte_to_send = 0x00
for j in range(0, y_end - y + 1):
# 1 byte = 8 pixels, steps of i = 8
for i in range(0, x_end - x + 1):
# Set the bits for the column of pixels at the current position.
if pixels[i, j] != 0:
byte_to_send |= 0x80 >> (i % 8)
if (i % 8 == 7):
self.send_data(byte_to_send)
byte_to_send = 0x00
##
# @brief: clear the frame memory with the specified color.
# this won't update the display.
##
def clear_frame_memory(self, color):
self.set_memory_area(0, 0, self.width - 1, self.height - 1)
self.set_memory_pointer(0, 0)
self.send_command(WRITE_RAM)
# send the color data
for i in range(0, self.width / 8 * self.height):
self.send_data(color)
##
# @brief: update the display
# there are 2 memory areas embedded in the e-paper display
# but once this function is called,
# the the next action of SetFrameMemory or ClearFrame will
# set the other memory area.
##
def display_frame(self):
self.send_command(DISPLAY_UPDATE_CONTROL_2)
self.send_data(0xC4)
self.send_command(MASTER_ACTIVATION)
self.send_command(TERMINATE_FRAME_READ_WRITE)
self.wait_until_idle()
##
# @brief: specify the memory area for data R/W
##
def set_memory_area(self, x_start, y_start, x_end, y_end):
self.send_command(SET_RAM_X_ADDRESS_START_END_POSITION)
# x point must be the multiple of 8 or the last 3 bits will be ignored
self.send_data((x_start >> 3) & 0xFF)
self.send_data((x_end >> 3) & 0xFF)
self.send_command(SET_RAM_Y_ADDRESS_START_END_POSITION)
self.send_data(y_start & 0xFF)
self.send_data((y_start >> 8) & 0xFF)
self.send_data(y_end & 0xFF)
self.send_data((y_end >> 8) & 0xFF)
##
# @brief: specify the start point for data R/W
##
def set_memory_pointer(self, x, y):
self.send_command(SET_RAM_X_ADDRESS_COUNTER)
# x point must be the multiple of 8 or the last 3 bits will be ignored
self.send_data((x >> 3) & 0xFF)
self.send_command(SET_RAM_Y_ADDRESS_COUNTER)
self.send_data(y & 0xFF)
self.send_data((y >> 8) & 0xFF)
self.wait_until_idle()
##
# @brief: 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.
# You can use reset() to awaken or init() to initialize
##
def sleep(self):
self.send_command(DEEP_SLEEP_MODE)
self.wait_until_idle()
### END OF FILE ###