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epdpil.py
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#!/usr/bin/env python3
# Waveshare 7.5inch e-Ink display
# Refer to Waveshare Wiki: https://www.waveshare.com/wiki/7.5inch_e-Paper_HAT
# Copyright (C) Waveshare July 10 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.
import spidev
import RPi.GPIO as GPIO
import io
import time
import numpy as np
from PIL import Image
# Config
CS_PIN = 8
THRESHOLD = 210
# EPD7IN5 commands
PANEL_SETTING = 0x00
POWER_SETTING = 0x01
POWER_OFF = 0x02
POWER_OFF_SEQUENCE_SETTING = 0x03
POWER_ON = 0x04
POWER_ON_MEASURE = 0x05
BOOSTER_SOFT_START = 0x06
DEEP_SLEEP = 0x07
DATA_START_TRANSMISSION_1 = 0x10
DATA_STOP = 0x11
DISPLAY_REFRESH = 0x12
IMAGE_PROCESS = 0x13
LUT_FOR_VCOM = 0x20
LUT_BLUE = 0x21
LUT_WHITE = 0x22
LUT_GRAY_1 = 0x23
LUT_GRAY_2 = 0x24
LUT_RED_0 = 0x25
LUT_RED_1 = 0x26
LUT_RED_2 = 0x27
LUT_RED_3 = 0x28
LUT_XON = 0x29
PLL_CONTROL = 0x30
TEMPERATURE_SENSOR_COMMAND = 0x40
TEMPERATURE_CALIBRATION = 0x41
TEMPERATURE_SENSOR_WRITE = 0x42
TEMPERATURE_SENSOR_READ = 0x43
VCOM_AND_DATA_INTERVAL_SETTING = 0x50
LOW_POWER_DETECTION = 0x51
TCON_SETTING = 0x60
TCON_RESOLUTION = 0x61
SPI_FLASH_CONTROL = 0x65
REVISION = 0x70
GET_STATUS = 0x71
AUTO_MEASUREMENT_VCOM = 0x80
READ_VCOM_VALUE = 0x81
VCM_DC_SETTING = 0x82
class EPD:
def __init__(self, width = 640, height = 384, reset_pin = 17, dc_pin = 25, cs_pin = 8, busy_pin = 24):
self.width = width
self.height = height
self.reset_pin = reset_pin
self.dc_pin = dc_pin
self.cs_pin = cs_pin
self.busy_pin = busy_pin
self.SPI = spidev.SpiDev(0, 0)
GPIO.setmode(GPIO.BCM)
GPIO.setwarnings(False)
GPIO.setup(self.reset_pin, GPIO.OUT)
GPIO.setup(self.dc_pin, GPIO.OUT)
GPIO.setup(self.cs_pin, GPIO.OUT)
GPIO.setup(self.busy_pin, GPIO.IN)
self.SPI.max_speed_hz = 2000000
self.SPI.mode = 0b00
def __del__(self):
GPIO.cleanup(self.reset_pin)
GPIO.cleanup(self.dc_pin)
GPIO.cleanup(self.cs_pin)
GPIO.cleanup(self.busy_pin)
def digital_write(self, pin, val):
GPIO.output(pin, val)
def digital_read(self, pin):
return GPIO.input(pin)
def send_command(self, cmd):
self.digital_write(self.dc_pin, GPIO.LOW)
self.SPI.writebytes([cmd])
def send_data(self, data):
self.digital_write(self.dc_pin, GPIO.HIGH)
self.SPI.writebytes([data])
def wait_until_idle(self):
while (self.digital_read(self.busy_pin) == 0):
time.sleep(0.1)
def reset(self):
self.digital_write(self.reset_pin, GPIO.LOW)
time.sleep(0.2)
self.digital_write(self.reset_pin, GPIO.HIGH)
time.sleep(0.2)
def sleep(self):
self.send_command(POWER_OFF)
self.wait_until_idle()
self.send_command(DEEP_SLEEP)
self.send_data(0xa5)
def init(self):
self.reset()
self.send_command(POWER_SETTING)
self.send_data(0x37)
self.send_data(0x00)
self.send_command(PANEL_SETTING)
self.send_data(0xCF)
self.send_data(0x08)
self.send_command(BOOSTER_SOFT_START)
self.send_data(0xc7)
self.send_data(0xcc)
self.send_data(0x28)
self.send_command(POWER_ON)
self.wait_until_idle()
self.send_command(PLL_CONTROL)
self.send_data(0x3c)
self.send_command(TEMPERATURE_CALIBRATION)
self.send_data(0x00)
self.send_command(VCOM_AND_DATA_INTERVAL_SETTING)
self.send_data(0x77)
self.send_command(TCON_SETTING)
self.send_data(0x22)
self.send_command(TCON_RESOLUTION)
self.send_data(0x02) #source 640
self.send_data(0x80)
self.send_data(0x01) #gate 384
self.send_data(0x80)
self.send_command(VCM_DC_SETTING)
self.send_data(0x1E) #decide by LUT file
self.send_command(0xe5) #FLASH MODE
self.send_data(0x03)
def get_frame_buffer(self, image, trh = THRESHOLD):
buf = [0x00] * (self.width * self.height // 8)
if (isinstance(image, str)): image = Image.open(image)
if (image.size[0] != self.width or image.size[1] != self.height):
raise ValueError("Image size error!")
image = np.array(image.convert("L"))
for y in range(self.height):
for x in range(self.width):
if (image[y, x] > trh):
buf[(x + y * self.width) // 8] |= 0x80 >> (x % 8)
return buf
def display_frame(self, fbuf):
self.send_command(DATA_START_TRANSMISSION_1)
for i in range(0, self.width * self.height // 8):
temp1 = fbuf[i]
for j in range(4):
pixdata = 0x00
if (temp1 & 0x80):
pixdata |= 0x30
if (temp1 & 0x40):
pixdata |= 0x03
temp1 = (temp1 << 2) & 0xff
self.send_data(pixdata)
self.send_command(DISPLAY_REFRESH)
time.sleep(0.1)
self.wait_until_idle()