122 lines
3.8 KiB
Python
122 lines
3.8 KiB
Python
# /*****************************************************************************
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# * | File : epdconfig.py
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# * | Author : Waveshare team
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# * | Function : Hardware underlying interface
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# * | Info :
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# *----------------
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# * | This version: V1.0
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# * | Date : 2019-06-21
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# * | Info :
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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 time
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import spidev
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import logging
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import numpy as np
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class RaspberryPi:
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def __init__(
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self,
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spi_freq=40000000,
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rst=27,
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dc=25,
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bl=18,
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bl_freq=1000,
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i2c=None,
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i2c_freq=100000,
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):
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import RPi.GPIO
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self.np = np
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self.RST_PIN = rst
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self.DC_PIN = dc
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self.BL_PIN = bl
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self.SPEED = spi_freq
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self.BL_freq = bl_freq
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self.GPIO = RPi.GPIO
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# self.GPIO.cleanup()
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self.GPIO.setmode(self.GPIO.BCM)
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self.GPIO.setwarnings(False)
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self.GPIO.setup(self.RST_PIN, self.GPIO.OUT)
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self.GPIO.setup(self.DC_PIN, self.GPIO.OUT)
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self.GPIO.setup(self.BL_PIN, self.GPIO.OUT)
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self.GPIO.output(self.BL_PIN, self.GPIO.HIGH)
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# Initialize SPI
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self.SPI = spidev.SpiDev()
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self.SPI.open(0, 0)
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self.SPI.max_speed_hz = spi_freq
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self.SPI.mode = 0b00
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def digital_write(self, pin, value):
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self.GPIO.output(pin, value)
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def digital_read(self, pin):
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return self.GPIO.input(pin)
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def delay_ms(self, delaytime):
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time.sleep(delaytime / 1000.0)
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def spi_writebyte(self, data):
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if self.SPI != None:
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self.SPI.writebytes(data)
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def bl_DutyCycle(self, duty):
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self._pwm.ChangeDutyCycle(duty)
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def bl_Frequency(self, freq):
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self._pwm.ChangeFrequency(freq)
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def module_init(self):
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self.GPIO.setup(self.RST_PIN, self.GPIO.OUT)
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self.GPIO.setup(self.DC_PIN, self.GPIO.OUT)
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self.GPIO.setup(self.BL_PIN, self.GPIO.OUT)
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self._pwm = self.GPIO.PWM(self.BL_PIN, self.BL_freq)
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self._pwm.start(100)
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if self.SPI != None:
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self.SPI.max_speed_hz = self.SPEED
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self.SPI.mode = 0b00
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return 0
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def module_exit(self):
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logging.debug("spi end")
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if self.SPI != None:
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self.SPI.close()
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logging.debug("gpio cleanup...")
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self.GPIO.output(self.RST_PIN, 1)
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self.GPIO.output(self.DC_PIN, 0)
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self._pwm.stop()
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time.sleep(0.001)
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self.GPIO.output(self.BL_PIN, 1)
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# self.GPIO.cleanup()
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"""
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if os.path.exists('/sys/bus/platform/drivers/gpiomem-bcm2835'):
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implementation = RaspberryPi()
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for func in [x for x in dir(implementation) if not x.startswith('_')]:
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setattr(sys.modules[__name__], func, getattr(implementation, func))
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"""
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### END OF FILE ###
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