config.py

# /*****************************************************************************
# * | File        :	  config.py
# * | Author      :   Waveshare team
# * | Function    :   Hardware underlying interface
# * | Info        :
# *----------------
# * | This version:   V1.0
# * | Date        :   2020-12-12
# * | 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 spidev
import RPi.GPIO as GPIO
import time

#GPIO.setmode(GPIO.BCM)

# Pin definition
RST_PIN     = 18
CS_PIN      = 22
DRDY_PIN    = 17

# SPI device, bus = 0, device = 0
SPI = spidev.SpiDev(0, 0)

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

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

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

def spi_writebyte(data):
    SPI.writebytes(data)
    
def spi_readbytes(reg):
    return SPI.readbytes(reg)
    
def module_init():
    GPIO.setmode(GPIO.BCM)
    GPIO.setwarnings(False)
    GPIO.setup(RST_PIN, GPIO.OUT)
    GPIO.setup(CS_PIN, GPIO.OUT)
    #GPIO.setup(DRDY_PIN, GPIO.IN)
    GPIO.setup(DRDY_PIN, GPIO.IN, pull_up_down=GPIO.PUD_UP)
    SPI.max_speed_hz = 200000
    SPI.mode = 0b01
    return 0;

def module_exit():
    SPI.close()
    GPIO.output(RST_PIN, 0)
    GPIO.output(CS_PIN, 0)
### END OF FILE ###