import spidev
import RPi.GPIO as GPIO
import time

# Pin definition
RST_PIN         = 17
DC_PIN          = 25
CS_PIN          = 8
BUSY_PIN        = 24

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

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

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

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

def spi_transfer(data):
    SPI.writebytes(data)

def epd_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(BUSY_PIN, GPIO.IN)
    SPI.max_speed_hz = 2000000
    SPI.mode = 0b00
    return 0;