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e-Paper/RaspberryPi_JetsonNano/python/lib/waveshare_epd/epd7in5.py Normal file
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# *****************************************************************************
# * | File : epd7in5.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 = 640
EPD_HEIGHT = 384
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
# 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 send_data2(self, data):
epdconfig.digital_write(self.dc_pin, 1)
epdconfig.digital_write(self.cs_pin, 0)
epdconfig.spi_writebyte2(data)
epdconfig.digital_write(self.cs_pin, 1)
def ReadBusy(self):
logger.debug("e-Paper busy")
while(epdconfig.digital_read(self.busy_pin) == 0): # 0: idle, 1: busy
epdconfig.delay_ms(100)
logger.debug("e-Paper busy release")
def init(self):
if (epdconfig.module_init() != 0):
return -1
# EPD hardware init start
self.reset()
self.send_command(0x01) # POWER_SETTING
self.send_data2([0x37, 0x00])
self.send_command(0x00) # PANEL_SETTING
self.send_data2([0xCF, 0x08])
self.send_command(0x06) # BOOSTER_SOFT_START
self.send_data2([0xc7, 0xcc, 0x28])
self.send_command(0x04) # POWER_ON
self.ReadBusy()
self.send_command(0x30) # PLL_CONTROL
self.send_data(0x3c)
self.send_command(0x41) # TEMPERATURE_CALIBRATION
self.send_data(0x00)
self.send_command(0x50) # VCOM_AND_DATA_INTERVAL_SETTING
self.send_data(0x77)
self.send_command(0x60) # TCON_SETTING
self.send_data(0x22)
self.send_command(0x61) # TCON_RESOLUTION
self.send_data(EPD_WIDTH >> 8) #source 640
self.send_data(EPD_WIDTH & 0xff)
self.send_data(EPD_HEIGHT >> 8) #gate 384
self.send_data(EPD_HEIGHT & 0xff)
self.send_command(0x82) # VCM_DC_SETTING
self.send_data(0x1E) # decide by LUT file
self.send_command(0xe5) # FLASH MODE
self.send_data(0x03)
# EPD hardware init end
return 0
def getbuffer(self, image):
img = image
imwidth, imheight = img.size
halfwidth = int(self.width / 2)
buf = [0x33] * halfwidth * self.height
if(imwidth == self.width and imheight == self.height):
img = img.convert('1')
elif(imwidth == self.height and imheight == self.width):
img = img.rotate(90, expand=True).convert('1')
imwidth, imheight = img.size
else:
logger.warning("Wrong image dimensions: must be " + str(self.width) + "x" + str(self.height))
# return a blank buffer
return buf
pixels = img.load()
for y in range(imheight):
offset = y * halfwidth
for x in range(1, imwidth, 2):
i = offset + x // 2
if(pixels[x-1, y] > 191):
if(pixels[x, y] > 191):
buf[i] = 0x33
else:
buf[i] = 0x30
else:
if(pixels[x, y] > 191):
buf[i] = 0x03
else:
buf[i] = 0x00
return buf
def display(self, image):
self.send_command(0x10)
self.send_data2(image)
self.send_command(0x12)
epdconfig.delay_ms(100)
self.ReadBusy()
def Clear(self):
buf = [0x33] * int(self.width * self.height / 2)
self.send_command(0x10)
self.send_data2(buf)
self.send_command(0x12)
self.ReadBusy()
def sleep(self):
self.send_command(0x02) # POWER_OFF
self.ReadBusy()
self.send_command(0x07) # DEEP_SLEEP
self.send_data(0XA5)
epdconfig.delay_ms(2000)
epdconfig.module_exit()
### END OF FILE ###