continus_fwt_sample.py

import spidev
import sys,time
import csv
import RPi.GPIO as GPIO
pin = 11
GPIO.setup(pin, GPIO.OUT)

spi = spidev.SpiDev()
spi.open(0, 1)
spi.bits_per_word=8
spi.cshigh=False

csvfile = open('fwt.csv','w')
fieldnames = ['value']
writer = csv.DictWriter(csvfile, fieldnames=fieldnames)
writer.writeheader()

print (spi.cshigh)
print (spi.max_speed_hz)
print (spi.mode)
print (spi.lsbfirst)

estado = False
try:
	#start = time.time()
	while True:
		con=1
		estado = not estado
		GPIO.output(pin, estado)
		while con<=1000:
			resp = spi.readbytes(2)
			resp[1] = resp[1]>>2
			resp[0] = (resp[0]&0b00111111)<<6
			valor = resp[1]|resp[0]
			#print 'valor' + str(valor) + '='+ str(valor*3.3/4095)
			writer.writerow({'value':valor})
			con+=1
			#time.sleep(0.001)
		#end = time.time()
		#print 'time : {0}'.format(end-start)
		#print con
	
#end while
except KeyboardInterrupt:
	spi.close()
	csvfile.close()			
#end try