From c60b3459228579134e8f15bd1036d3404d166ae0 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Thorben=20G=C3=BCnther?= Date: Sun, 5 Jul 2020 15:40:49 +0200 Subject: [PATCH] Add driver --- driver.py | 186 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 186 insertions(+) create mode 100644 driver.py diff --git a/driver.py b/driver.py new file mode 100644 index 0000000..2edab15 --- /dev/null +++ b/driver.py @@ -0,0 +1,186 @@ +# ***************************************************************************** +# 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 time + +import RPi.GPIO as GPIO +import spidev + +# Display resolution +EPD_WIDTH = 800 +EPD_HEIGHT = 480 + +# Pins +RST_PIN = 17 +DC_PIN = 25 +CS_PIN = 8 +BUSY_PIN = 24 + +SPI = spidev.SpiDev(0, 0) + + +class EPD: + def __init__(self): + self.reset_pin = RST_PIN + self.dc_pin = DC_PIN + self.busy_pin = BUSY_PIN + self.cs_pin = CS_PIN + self.width = EPD_WIDTH + self.height = EPD_HEIGHT + + def module_init(self): + GPIO.setmode(GPIO.BCM) + GPIO.setwarnings(False) + GPIO.setup(RST_PIN, GPIO.OUT) + GPIO.setup(DC_PIN, GPIO.OUT) + GPIO.setup(CS_PIN, GPIO.OUT) + GPIO.setup(BUSY_PIN, GPIO.IN) + SPI.max_speed_hz = 4000000 + SPI.mode = 0b00 + return 0 + + def module_exit(self): + SPI.close() + + GPIO.output(RST_PIN, 0) + GPIO.output(DC_PIN, 0) + + GPIO.cleanup() + + def delay_ms(self, delaytime): + time.sleep(delaytime / 1000.0) + + # Hardware reset + def reset(self): + GPIO.output(self.reset_pin, 1) + self.delay_ms(200) + GPIO.output(self.reset_pin, 0) + self.delay_ms(2) + GPIO.output(self.reset_pin, 1) + self.delay_ms(200) + + def send_command(self, command): + GPIO.output(self.dc_pin, 0) + GPIO.output(self.cs_pin, 0) + SPI.writebytes([command]) + GPIO.output(self.cs_pin, 1) + + def send_data(self, data): + GPIO.output(self.dc_pin, 1) + GPIO.output(self.cs_pin, 0) + SPI.writebytes([data]) + GPIO.output(self.cs_pin, 1) + + def ReadBusy(self): + self.send_command(0x71) + busy = GPIO.input(self.busy_pin) + while busy == 0: + self.send_command(0x71) + busy = GPIO.input(self.busy_pin) + self.delay_ms(200) + + def init(self): + if self.module_init() != 0: + return -1 + # EPD hardware init start + self.reset() + + self.send_command(0x01) # POWER SETTING + self.send_data(0x07) + self.send_data(0x07) # VGH=20V,VGL=-20V + self.send_data(0x3F) # VDH=15V + self.send_data(0x3F) # VDL=-15V + + self.send_command(0x04) # POWER ON + self.delay_ms(100) + self.ReadBusy() + + self.send_command(0x00) # PANNEL SETTING + self.send_data(0x1F) # KW-3f KWR-2F BWROTP 0f BWOTP 1f + + self.send_command(0x61) # tres + self.send_data(0x03) # source 800 + self.send_data(0x20) + self.send_data(0x01) # gate 480 + self.send_data(0xE0) + + self.send_command(0x15) + self.send_data(0x00) + + self.send_command(0x50) # VCOM AND DATA INTERVAL SETTING + self.send_data(0x10) + self.send_data(0x07) + + self.send_command(0x60) # TCON SETTING + self.send_data(0x22) + + # EPD hardware init end + return 0 + + def clear(self): + self.send_command(0x10) + for i in range(0, int(self.width * self.height / 8)): + self.send_data(0x00) + + self.send_command(0x13) + for i in range(0, int(self.width * self.height / 8)): + self.send_data(0x00) + + self.send_command(0x12) + self.delay_ms(100) + self.ReadBusy() + + def display(self, image): + self.send_command(0x13) + for i in range(0, int(self.width * self.height / 8)): + self.send_data(~image[i]) + + self.send_command(0x12) + self.delay_ms(100) + self.ReadBusy() + + def getbuffer(self, image): + buf = [0xFF] * (int(self.width / 8) * self.height) + image_monocolor = image.convert("1") + imwidth, imheight = image_monocolor.size + pixels = image_monocolor.load() + + if imwidth == self.width and imheight == self.height: + for y in range(imheight): + for x in range(imwidth): + # Set the bits for the column of pixels at the current position. + if pixels[x, y] == 0: + buf[int((x + y * self.width) / 8)] &= ~(0x80 >> (x % 8)) + elif imwidth == self.height and imheight == self.width: + for y in range(imheight): + for x in range(imwidth): + newx = y + newy = self.height - x - 1 + if pixels[x, y] == 0: + buf[int((newx + newy * self.width) / 8)] &= ~(0x80 >> (y % 8)) + return buf + + def sleep(self): + self.send_command(0x02) # POWER_OFF + self.ReadBusy() + + self.send_command(0x07) # DEEP_SLEEP + self.send_data(0xA5) + + self.module_exit() -- 2.44.0