e-paper-display/bcm2835-1.71/e-Paper/RaspberryPi_JetsonNano/python/lib/waveshare_epd/epd4in37g.py

243 lines
7.9 KiB
Python

# *****************************************************************************
# * | File : epd4in37g.py
# * | Author : Waveshare team
# * | Function : Electronic paper driver
# * | Info :
# *----------------
# * | This version: V1.0
# * | Date : 2022-08-15
# # | 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
import PIL
from PIL import Image
import io
# Display resolution
EPD_WIDTH = 512
EPD_HEIGHT = 368
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
self.BLACK = 0x000000 # 00 BGR
self.WHITE = 0xffffff # 01
self.YELLOW = 0x00ffff # 10
self.RED = 0x0000ff # 11
# Hardware reset
def reset(self):
epdconfig.digital_write(self.reset_pin, 1)
epdconfig.delay_ms(200)
epdconfig.digital_write(self.reset_pin, 0) # module reset
epdconfig.delay_ms(2)
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 ReadBusyH(self):
logger.debug("e-Paper busy H")
while(epdconfig.digital_read(self.busy_pin) == 0): # 0: idle, 1: busy
epdconfig.delay_ms(5)
logger.debug("e-Paper busy H release")
def ReadBusyL(self):
logger.debug("e-Paper busy L")
while(epdconfig.digital_read(self.busy_pin) == 1): # 0: busy, 1: idle
epdconfig.delay_ms(5)
logger.debug("e-Paper busy L release")
def TurnOnDisplay(self):
self.send_command(0x12) # DISPLAY_REFRESH
self.send_data(0x00)
self.ReadBusyH()
self.send_command(0x02) # POWER_OFF
self.send_data(0X00)
self.ReadBusyH()
def init(self):
if (epdconfig.module_init() != 0):
return -1
# EPD hardware init start
self.reset()
self.ReadBusyH()
epdconfig.delay_ms(30)
self.send_command(0xAA)
self.send_data(0x49)
self.send_data(0x55)
self.send_data(0x20)
self.send_data(0x08)
self.send_data(0x09)
self.send_data(0x18)
self.send_command(0x01)
self.send_data(0x3F)
self.send_command(0x00)
self.send_data(0x4F)
self.send_data(0x69)
self.send_command(0x05)
self.send_data(0x40)
self.send_data(0x1F)
self.send_data(0x1F)
self.send_data(0x2C)
self.send_command(0x08)
self.send_data(0x6F)
self.send_data(0x1F)
self.send_data(0x1F)
self.send_data(0x22)
# ===================
# 20211212
# First setting
self.send_command(0x06)
self.send_data(0x6F)
self.send_data(0x1F)
self.send_data(0x17)
self.send_data(0x17)
# ===================
self.send_command(0x03)
self.send_data(0x00)
self.send_data(0x54)
self.send_data(0x00)
self.send_data(0x44)
self.send_command(0x60)
self.send_data(0x02)
self.send_data(0x00)
# Please notice that PLL must be set for version 2 IC
self.send_command(0x30)
self.send_data(0x08)
self.send_command(0x50)
self.send_data(0x3F)
self.send_command(0x61)
self.send_data(0x02)
self.send_data(0x00)
self.send_data(0x01)
self.send_data(0x70)
self.send_command(0xE3)
self.send_data(0x2F)
self.send_command(0x84)
self.send_data(0x01)
return 0
def getbuffer(self, image):
# Create a pallette with the 4 colors supported by the panel
pal_image = Image.new("P", (1,1))
pal_image.putpalette( (0,0,0, 255,255,255, 255,255,0, 255,0,0) + (0,0,0)*252)
# Check if we need to rotate the image
imwidth, imheight = image.size
if(imwidth == self.width and imheight == self.height):
image_temp = image
elif(imwidth == self.height and imheight == self.width):
image_temp = image.rotate(90, expand=True)
else:
logger.warning("Invalid image dimensions: %d x %d, expected %d x %d" % (imwidth, imheight, self.width, self.height))
# Convert the soruce image to the 4 colors, dithering if needed
image_4color = image_temp.convert("RGB").quantize(palette=pal_image)
buf_4color = bytearray(image_4color.tobytes('raw'))
# into a single byte to transfer to the panel
buf = [0x00] * int(self.width * self.height / 4)
idx = 0
for i in range(0, len(buf_4color), 4):
buf[idx] = (buf_4color[i] << 6) + (buf_4color[i+1] << 4) + (buf_4color[i+2] << 2) + buf_4color[i+3]
idx += 1
return buf
def display(self, image):
if self.width % 4 == 0 :
Width = self.width // 4
else :
Width = self.width // 4 + 1
Height = self.height
self.send_command(0x04)
self.ReadBusyH()
self.send_command(0x10)
for j in range(0, Height):
for i in range(0, Width):
self.send_data(image[i + j * Width])
self.TurnOnDisplay()
def Clear(self, color=0x55):
if self.width % 4 == 0 :
Width = self.width // 4
else :
Width = self.width // 4 + 1
Height = self.height
self.send_command(0x04)
self.ReadBusyH()
self.send_command(0x10)
for j in range(0, Height):
for i in range(0, Width):
self.send_data(color)
self.TurnOnDisplay()
def sleep(self):
self.send_command(0x02) # POWER_OFF
self.send_data(0x00)
self.send_command(0x07) # DEEP_SLEEP
self.send_data(0XA5)
epdconfig.delay_ms(2000)
epdconfig.module_exit()
### END OF FILE ###