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- # /*****************************************************************************
- # * | File : epdconfig.py
- # * | Author : Waveshare team
- # * | Function : Hardware underlying interface
- # * | Info :
- # *----------------
- # * | This version: V1.0
- # * | Date : 2019-06-21
- # * | Info :
- # ******************************************************************************
- # 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 os
- import logging
- import sys
- import time
- logger = logging.getLogger(__name__)
- class RaspberryPi:
- # Pin definition
- RST_PIN = 17
- DC_PIN = 25
- CS_PIN = 8
- BUSY_PIN = 24
- def __init__(self):
- import spidev
- import RPi.GPIO
- self.GPIO = RPi.GPIO
- self.SPI = spidev.SpiDev()
- def digital_write(self, pin, value):
- self.GPIO.output(pin, value)
- def digital_read(self, pin):
- return self.GPIO.input(pin)
- def delay_ms(self, delaytime):
- time.sleep(delaytime / 1000.0)
- def spi_writebyte(self, data):
- self.SPI.writebytes(data)
- def spi_writebyte2(self, data):
- self.SPI.writebytes2(data)
- def module_init(self):
- self.GPIO.setmode(self.GPIO.BCM)
- self.GPIO.setwarnings(False)
- self.GPIO.setup(self.RST_PIN, self.GPIO.OUT)
- self.GPIO.setup(self.DC_PIN, self.GPIO.OUT)
- self.GPIO.setup(self.CS_PIN, self.GPIO.OUT)
- self.GPIO.setup(self.BUSY_PIN, self.GPIO.IN)
- # SPI device, bus = 0, device = 0
- self.SPI.open(0, 0)
- self.SPI.max_speed_hz = 4000000
- self.SPI.mode = 0b00
- return 0
- def module_exit(self):
- logger.debug("spi end")
- self.SPI.close()
- logger.debug("close 5V, Module enters 0 power consumption ...")
- self.GPIO.output(self.RST_PIN, 0)
- self.GPIO.output(self.DC_PIN, 0)
- self.GPIO.cleanup([self.RST_PIN, self.DC_PIN, self.CS_PIN, self.BUSY_PIN])
- class JetsonNano:
- # Pin definition
- RST_PIN = 17
- DC_PIN = 25
- CS_PIN = 8
- BUSY_PIN = 24
- def __init__(self):
- import ctypes
- find_dirs = [
- os.path.dirname(os.path.realpath(__file__)),
- '/usr/local/lib',
- '/usr/lib',
- ]
- self.SPI = None
- for find_dir in find_dirs:
- so_filename = os.path.join(find_dir, 'sysfs_software_spi.so')
- if os.path.exists(so_filename):
- self.SPI = ctypes.cdll.LoadLibrary(so_filename)
- break
- if self.SPI is None:
- raise RuntimeError('Cannot find sysfs_software_spi.so')
- import Jetson.GPIO
- self.GPIO = Jetson.GPIO
- def digital_write(self, pin, value):
- self.GPIO.output(pin, value)
- def digital_read(self, pin):
- return self.GPIO.input(self.BUSY_PIN)
- def delay_ms(self, delaytime):
- time.sleep(delaytime / 1000.0)
- def spi_writebyte(self, data):
- self.SPI.SYSFS_software_spi_transfer(data[0])
- def module_init(self):
- self.GPIO.setmode(self.GPIO.BCM)
- self.GPIO.setwarnings(False)
- self.GPIO.setup(self.RST_PIN, self.GPIO.OUT)
- self.GPIO.setup(self.DC_PIN, self.GPIO.OUT)
- self.GPIO.setup(self.CS_PIN, self.GPIO.OUT)
- self.GPIO.setup(self.BUSY_PIN, self.GPIO.IN)
- self.SPI.SYSFS_software_spi_begin()
- return 0
- def module_exit(self):
- logger.debug("spi end")
- self.SPI.SYSFS_software_spi_end()
- logger.debug("close 5V, Module enters 0 power consumption ...")
- self.GPIO.output(self.RST_PIN, 0)
- self.GPIO.output(self.DC_PIN, 0)
- self.GPIO.cleanup([self.RST_PIN, self.DC_PIN, self.CS_PIN, self.BUSY_PIN])
- if os.path.exists('/sys/bus/platform/drivers/gpiomem-bcm2835'):
- implementation = RaspberryPi()
- else:
- implementation = JetsonNano()
- for func in [x for x in dir(implementation) if not x.startswith('_')]:
- setattr(sys.modules[__name__], func, getattr(implementation, func))
- ### END OF FILE ###
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