64 lines
2 KiB
Python
64 lines
2 KiB
Python
##
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# @filename : epdif.py
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# @brief : EPD hardware interface implements (GPIO, SPI)
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# @author : Yehui from Waveshare
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#
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# Copyright (C) Waveshare July 10 2017
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#
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documnetation files (the "Software"), to deal
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# in the Software without restriction, including without limitation the rights
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# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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# copies of the Software, and to permit persons to whom the Software is
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# furished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in
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# all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS OR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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# THE SOFTWARE.
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#
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import spidev
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import RPi.GPIO as GPIO
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import time
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# Pin definition
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RST_PIN = 17
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DC_PIN = 25
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CS_PIN = 8
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BUSY_PIN = 24
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# SPI device, bus = 0, device = 0
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SPI = spidev.SpiDev(0, 0)
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#SPI.no_cs = True
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def epd_digital_write(pin, value):
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GPIO.output(pin, value)
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def epd_digital_read(pin):
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return GPIO.input(BUSY_PIN)
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def epd_delay_ms(delaytime):
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time.sleep(delaytime / 1000.0)
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def spi_transfer(data):
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SPI.writebytes(data)
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def epd_init():
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GPIO.setmode(GPIO.BCM)
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GPIO.setwarnings(False)
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GPIO.setup(RST_PIN, GPIO.OUT)
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GPIO.setup(DC_PIN, GPIO.OUT)
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GPIO.setup(CS_PIN, GPIO.OUT)
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GPIO.setup(BUSY_PIN, GPIO.IN)
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SPI.max_speed_hz = 6250000 #was 2000000
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SPI.mode = 0b00 #was 0b00
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return 0;
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### END OF FILE ###
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