config.py

# /*****************************************************************************
# * | File        :	  config.py
# * | Author      :   Waveshare team
# * | Function    :   Hardware underlying interface,for Jetson nano
# * | Info        :
# *----------------
# * | This version:   V1.0
# * | Date        :   2019-06-06
# * | 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 RPi.GPIO as GPIO
import time
from smbus import SMBus
import spidev

import ctypes
# import spidev

# Pin definition
RST_PIN         = 25
DC_PIN          = 24
CS_PIN          = 8
BL_PIN          = 18

Device_SPI = 1
Device_I2C = 0



if(Device_SPI == 1):
    Device = Device_SPI
    spi = spidev.SpiDev(0, 0)
else :
    Device = Device_I2C
    address         = 0x3C
    bus = SMBus(1)

def digital_write(pin, value):
    GPIO.output(pin, value)

def digital_read(pin):
    return GPIO.input(BUSY_PIN)

def delay_ms(delaytime):
    time.sleep(delaytime / 1000.0)

def spi_writebyte(data):
    # SPI.writebytes(data)
    spi.writebytes([data[0]])

def i2c_writebyte(reg, value):
    bus.write_byte_data(address, reg, value)
    
    # time.sleep(0.01)
def module_init():
    # print("module_init")

    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(BL_PIN, GPIO.OUT)

    
    # SPI.max_speed_hz = 2000000
    # SPI.mode = 0b00
    # i2c_writebyte(0xff,0xff)
    if(Device == Device_SPI):
        # spi.SYSFS_software_spi_begin()
        # spi.SYSFS_software_spi_setDataMode(0);
        # spi.SYSFS_software_spi_setClockDivider(1);
        spi.max_speed_hz = 2000000
        spi.mode = 0b00
    
    GPIO.output(CS_PIN, 0)
    GPIO.output(BL_PIN, 1)
    GPIO.output(DC_PIN, 0)
    return 0

def module_exit():
    if(Device == Device_SPI):
        spi.SYSFS_software_spi_end()
    else :
        bus.close()
    GPIO.output(RST_PIN, 0)
    GPIO.output(DC_PIN, 0)
    
    

### END OF FILE ###