#import time
import os
import time 
from time import sleep
from datetime import datetime

# Import SPI library (for hardware SPI) and RAS library.
import Adafruit_GPIO.SPI as SPI
import RAS_ADS7952

# Hardware SPI configuration:
SPI_PORT   = 0
SPI_DEVICE = 0
mcp = RAS_ADS7952.ADS7952(spi=SPI.SpiDev(SPI_PORT, SPI_DEVICE))

# Create a save file when software is initiated and stored in home/pi directory:
file = open("/home/pi/RAS_data_log.csv", "a")
i=0
if os.stat("/home/pi/RAS_data_log.csv").st_size == 0:
    file.write("Date and Time,Sensor1,Sensor2,Sensor3,Sensor4,Sensor5,Sensor6,Sensor7,Sensor8,Sensor9,Sensor10,Sensor11,Sensor12\n")

print('Reading ADS7952 values, press Ctrl-C to quit...')
# Print nice channel column headers.
print('| Date and Time | {0:>4} | {1:>4} | {2:>4} | {3:>4} | {4:>4} | {5:>4} | {6:>4} | {7:>4} | {8:>4} | {9:>4} | {10:>4} | {11:>4} |'.format(*range(12)))
print('-' * 57)
# Main program loop.
while True:
    # Read all the ADC channel values in a list.
    values = [0]*12
    for i in range(12):
        # The read_adc function will get the value of the specified channel (0-11).
        values[i] = mcp.read_adc(i)
        now = datetime.now()
    # Print the ADC values.
    print('| {0:>4} | {1:>4} | {2:>4} | {3:>4} | {4:>4} | {5:>4} | {6:>4} | {7:>4} | {8:>4} | {9:>4} | {10:>4} | {11:>4} |'.format(*values))
    file.write(str(now)+","+str(values)+"\n")
    file.flush()
    # Sample time in seconds...
    time.sleep(0.005)