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Add lib/waveshare_epd/epd2in13_V4.py

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Zakary Timson 2024-07-26 21:57:06 -04:00
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# *****************************************************************************
# * | File : epd2in13_V4.py
# * | Author : Waveshare team
# * | Function : Electronic paper driver
# * | Info :
# *----------------
# * | This version: V1.0
# * | Date : 2023-06-25
# # | 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
'''
function :Hardware reset
parameter:
'''
def reset(self):
epdconfig.digital_write(self.reset_pin, 1)
epdconfig.delay_ms(20)
epdconfig.digital_write(self.reset_pin, 0)
epdconfig.delay_ms(2)
epdconfig.digital_write(self.reset_pin, 1)
epdconfig.delay_ms(20)
'''
function :send command
parameter:
command : Command register
'''
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)
'''
function :send data
parameter:
data : Write data
'''
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)
# send a lot of data
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)
'''
function :Wait until the busy_pin goes LOW
parameter:
'''
def ReadBusy(self):
logger.debug("e-Paper busy")
while(epdconfig.digital_read(self.busy_pin) == 1): # 0: idle, 1: busy
epdconfig.delay_ms(10)
logger.debug("e-Paper busy release")
'''
function : Turn On Display
parameter:
'''
def TurnOnDisplay(self):
self.send_command(0x22) # Display Update Control
self.send_data(0xf7)
self.send_command(0x20) # Activate Display Update Sequence
self.ReadBusy()
'''
function : Turn On Display Fast
parameter:
'''
def TurnOnDisplay_Fast(self):
self.send_command(0x22) # Display Update Control
self.send_data(0xC7) # fast:0x0c, quality:0x0f, 0xcf
self.send_command(0x20) # Activate Display Update Sequence
self.ReadBusy()
'''
function : Turn On Display Part
parameter:
'''
def TurnOnDisplayPart(self):
self.send_command(0x22) # Display Update Control
self.send_data(0xff) # fast:0x0c, quality:0x0f, 0xcf
self.send_command(0x20) # Activate Display Update Sequence
self.ReadBusy()
'''
function : Setting the display window
parameter:
xstart : X-axis starting position
ystart : Y-axis starting position
xend : End position of X-axis
yend : End position of Y-axis
'''
def SetWindow(self, x_start, y_start, x_end, y_end):
self.send_command(0x44) # 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(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)
'''
function : Set Cursor
parameter:
x : X-axis starting position
y : Y-axis starting position
'''
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 & 0xFF)
self.send_command(0x4F) # SET_RAM_Y_ADDRESS_COUNTER
self.send_data(y & 0xFF)
self.send_data((y >> 8) & 0xFF)
'''
function : Initialize the e-Paper register
parameter:
'''
def init(self):
if (epdconfig.module_init() != 0):
return -1
# EPD hardware init start
self.reset()
self.ReadBusy()
self.send_command(0x12) #SWRESET
self.ReadBusy()
self.send_command(0x01) #Driver output control
self.send_data(0xf9)
self.send_data(0x00)
self.send_data(0x00)
self.send_command(0x11) #data entry mode
self.send_data(0x03)
self.SetWindow(0, 0, self.width-1, self.height-1)
self.SetCursor(0, 0)
self.send_command(0x3c)
self.send_data(0x05)
self.send_command(0x21) # Display update control
self.send_data(0x00)
self.send_data(0x80)
self.send_command(0x18)
self.send_data(0x80)
self.ReadBusy()
return 0
'''
function : Initialize the e-Paper fast register
parameter:
'''
def init_fast(self):
if (epdconfig.module_init() != 0):
return -1
# EPD hardware init start
self.reset()
self.send_command(0x12) #SWRESET
self.ReadBusy()
self.send_command(0x18) # Read built-in temperature sensor
self.send_command(0x80)
self.send_command(0x11) # data entry mode
self.send_data(0x03)
self.SetWindow(0, 0, self.width-1, self.height-1)
self.SetCursor(0, 0)
self.send_command(0x22) # Load temperature value
self.send_data(0xB1)
self.send_command(0x20)
self.ReadBusy()
self.send_command(0x1A) # Write to temperature register
self.send_data(0x64)
self.send_data(0x00)
self.send_command(0x22) # Load temperature value
self.send_data(0x91)
self.send_command(0x20)
self.ReadBusy()
return 0
'''
function : Display images
parameter:
image : Image data
'''
def getbuffer(self, image):
img = image
imwidth, imheight = img.size
if(imwidth == self.width and imheight == self.height):
img = img.convert('1')
elif(imwidth == self.height and imheight == self.width):
# image has correct dimensions, but needs to be rotated
img = img.rotate(90, expand=True).convert('1')
else:
logger.warning("Wrong image dimensions: must be " + str(self.width) + "x" + str(self.height))
# return a blank buffer
return [0x00] * (int(self.width/8) * self.height)
buf = bytearray(img.tobytes('raw'))
return buf
'''
function : Sends the image buffer in RAM to e-Paper and displays
parameter:
image : Image data
'''
def display(self, image):
self.send_command(0x24)
self.send_data2(image)
self.TurnOnDisplay()
'''
function : Sends the image buffer in RAM to e-Paper and fast displays
parameter:
image : Image data
'''
def display_fast(self, image):
self.send_command(0x24)
self.send_data2(image)
self.TurnOnDisplay_Fast()
'''
function : Sends the image buffer in RAM to e-Paper and partial refresh
parameter:
image : Image data
'''
def displayPartial(self, image):
epdconfig.digital_write(self.reset_pin, 0)
epdconfig.delay_ms(1)
epdconfig.digital_write(self.reset_pin, 1)
self.send_command(0x3C) # BorderWavefrom
self.send_data(0x80)
self.send_command(0x01) # Driver output control
self.send_data(0xF9)
self.send_data(0x00)
self.send_data(0x00)
self.send_command(0x11) # data entry mode
self.send_data(0x03)
self.SetWindow(0, 0, self.width - 1, self.height - 1)
self.SetCursor(0, 0)
self.send_command(0x24) # WRITE_RAM
self.send_data2(image)
self.TurnOnDisplayPart()
'''
function : Refresh a base image
parameter:
image : Image data
'''
def displayPartBaseImage(self, image):
self.send_command(0x24)
self.send_data2(image)
self.send_command(0x26)
self.send_data2(image)
self.TurnOnDisplay()
'''
function : Clear screen
parameter:
'''
def Clear(self, color=0xFF):
if self.width%8 == 0:
linewidth = int(self.width/8)
else:
linewidth = int(self.width/8) + 1
# logger.debug(linewidth)
self.send_command(0x24)
self.send_data2([color] * int(self.height * linewidth))
self.TurnOnDisplay()
'''
function : Enter sleep mode
parameter:
'''
def sleep(self):
self.send_command(0x10) #enter deep sleep
self.send_data(0x01)
epdconfig.delay_ms(2000)
epdconfig.module_exit()
### END OF FILE ###