e-paper-display/bcm2835-1.71/e-Paper/RaspberryPi_JetsonNano/python/lib/waveshare_epd/epd2in13.py

228 lines
8.2 KiB
Python

# *****************************************************************************
# * | File : epd2in13.py
# * | Author : Waveshare team
# * | Function : Electronic paper driver
# * | Info :
# *----------------
# * | This version: V4.0
# * | Date : 2019-06-20
# # | Info : python demo
# -----------------------------------------------------------------------------
# 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 logging
from . import epdconfig
# Display resolution
EPD_WIDTH = 122
EPD_HEIGHT = 250
logger = logging.getLogger(__name__)
class EPD:
def __init__(self):
self.reset_pin = epdconfig.RST_PIN
self.dc_pin = epdconfig.DC_PIN
self.busy_pin = epdconfig.BUSY_PIN
self.cs_pin = epdconfig.CS_PIN
self.width = EPD_WIDTH
self.height = EPD_HEIGHT
lut_full_update = [
0x22, 0x55, 0xAA, 0x55, 0xAA, 0x55, 0xAA, 0x11,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x1E, 0x1E, 0x1E, 0x1E, 0x1E, 0x1E, 0x1E, 0x1E,
0x01, 0x00, 0x00, 0x00, 0x00, 0x00
]
lut_partial_update = [
0x18, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x0F, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00
]
# Hardware reset
def reset(self):
epdconfig.digital_write(self.reset_pin, 1)
epdconfig.delay_ms(200)
epdconfig.digital_write(self.reset_pin, 0)
epdconfig.delay_ms(5)
epdconfig.digital_write(self.reset_pin, 1)
epdconfig.delay_ms(200)
def send_command(self, command):
epdconfig.digital_write(self.dc_pin, 0)
epdconfig.digital_write(self.cs_pin, 0)
epdconfig.spi_writebyte([command])
epdconfig.digital_write(self.cs_pin, 1)
def send_data(self, data):
epdconfig.digital_write(self.dc_pin, 1)
epdconfig.digital_write(self.cs_pin, 0)
epdconfig.spi_writebyte([data])
epdconfig.digital_write(self.cs_pin, 1)
def ReadBusy(self):
while(epdconfig.digital_read(self.busy_pin) == 1): # 0: idle, 1: busy
epdconfig.delay_ms(100)
def TurnOnDisplay(self):
self.send_command(0x22) # DISPLAY_UPDATE_CONTROL_2
self.send_data(0xC4)
self.send_command(0x20) # MASTER_ACTIVATION
self.send_command(0xFF) # TERMINATE_FRAME_READ_WRITE
logger.debug("e-Paper busy")
self.ReadBusy()
logger.debug("e-Paper busy release")
def init(self, lut):
if (epdconfig.module_init() != 0):
return -1
# EPD hardware init start
self.reset()
self.send_command(0x01) # 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(0x0C) # BOOSTER_SOFT_START_CONTROL
self.send_data(0xD7)
self.send_data(0xD6)
self.send_data(0x9D)
self.send_command(0x2C) # WRITE_VCOM_REGISTER
self.send_data(0xA8) # VCOM 7C
self.send_command(0x3A) # SET_DUMMY_LINE_PERIOD
self.send_data(0x1A) # 4 dummy lines per gate
self.send_command(0x3B) # SET_GATE_TIME
self.send_data(0x08) # 2us per line
self.send_command(0X3C) # BORDER_WAVEFORM_CONTROL
self.send_data(0x03)
self.send_command(0X11) # DATA_ENTRY_MODE_SETTING
self.send_data(0x03) # X increment; Y increment
# WRITE_LUT_REGISTER
self.send_command(0x32)
for count in range(30):
self.send_data(lut[count])
return 0
##
# @brief: specify the memory area for data R/W
##
def SetWindows(self, x_start, y_start, x_end, y_end):
self.send_command(0x44) # SET_RAM_X_ADDRESS_START_END_POSITION
self.send_data((x_start >> 3) & 0xFF)
self.send_data((x_end >> 3) & 0xFF)
self.send_command(0x45) # 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 SetCursor(self, x, y):
self.send_command(0x4E) # 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(0x4F) # SET_RAM_Y_ADDRESS_COUNTER
self.send_data(y & 0xFF)
self.send_data((y >> 8) & 0xFF)
self.ReadBusy()
def getbuffer(self, image):
if self.width%8 == 0:
linewidth = int(self.width/8)
else:
linewidth = int(self.width/8) + 1
buf = [0xFF] * (linewidth * self.height)
image_monocolor = image.convert('1')
imwidth, imheight = image_monocolor.size
pixels = image_monocolor.load()
if(imwidth == self.width and imheight == self.height):
logger.debug("Vertical")
for y in range(imheight):
for x in range(imwidth):
if pixels[x, y] == 0:
# x = imwidth - x
buf[int(x / 8) + y * linewidth] &= ~(0x80 >> (x % 8))
elif(imwidth == self.height and imheight == self.width):
logger.debug("Horizontal")
for y in range(imheight):
for x in range(imwidth):
newx = y
newy = self.height - x - 1
if pixels[x, y] == 0:
# newy = imwidth - newy - 1
buf[int(newx / 8) + newy*linewidth] &= ~(0x80 >> (y % 8))
return buf
def display(self, image):
if self.width%8 == 0:
linewidth = int(self.width/8)
else:
linewidth = int(self.width/8) + 1
self.SetWindows(0, 0, self.width, self.height);
for j in range(0, self.height):
self.SetCursor(0, j);
self.send_command(0x24);
for i in range(0, linewidth):
self.send_data(image[i + j * linewidth])
self.TurnOnDisplay()
def Clear(self, color=0xFF):
if self.width%8 == 0:
linewidth = int(self.width/8)
else:
linewidth = int(self.width/8) + 1
self.SetWindows(0, 0, self.width, self.height);
for j in range(0, self.height):
self.SetCursor(0, j);
self.send_command(0x24);
for i in range(0, linewidth):
self.send_data(color)
self.TurnOnDisplay()
def sleep(self):
self.send_command(0x10) #enter deep sleep
self.send_data(0x01)
epdconfig.delay_ms(100)
epdconfig.delay_ms(2000)
epdconfig.module_exit()
### END OF FILE ###