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epdconfig.py
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epdconfig.py
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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
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
# SPI device, bus = 0, device = 0
self.SPI = spidev.SpiDev(0, 0)
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)
self.SPI.max_speed_hz = 4000000
self.SPI.mode = 0b00
return 0
def module_exit(self):
logging.debug("spi end")
self.SPI.close()
logging.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()
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):
logging.debug("spi end")
self.SPI.SYSFS_software_spi_end()
logging.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()
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 ###