Adeept_RFID_Learning_Kit_Python_Code_for_RPi/ADC0832_tmp.py at master · adeept/Adeept_RFID_Learning_Kit_Python_Code_for_RPi · GitHub

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#!/usr/bin/env python
#-----------------------------------------------------
#
#		This is a program for all ADC Module. It
#	convert analog singnal to digital signal.
#
#		This program is most analog signal modules'
#	dependency. Use it like this:
#		`import ADC0832`
#		`sig = ADC0832.getResult(chn)`
#
#	*'chn' should be 0 or 1 represent for ch0 or ch1
#	on ADC0832
#
#		  ACD1302				  Pi
#			CS ---------------- Pin 11
#			CLK --------------- Pin 13
#			DI ---------------- Pin 12

#			VCC ----------------- 3.3V
#			GND ------------------ GND
#
#-----------------------------------------------------
import RPi.GPIO as GPIO
import time

ADC_CS  = 11
ADC_CLK = 12
ADC_DIO = 13

# using default pins for backwards compatibility
def setup(cs=ADC_CS,clk=ADC_CLK,dio=ADC_DIO):
        global ADC_CS, ADC_CLK, ADC_DIO
        ADC_CS=cs
        ADC_CLK=clk
        ADC_DIO=dio
	GPIO.setwarnings(False)
	GPIO.setmode(GPIO.BOARD)    		# Number GPIOs by its physical location
	GPIO.setup(ADC_CS, GPIO.OUT)		# Set pins' mode is output
	GPIO.setup(ADC_CLK, GPIO.OUT)		# Set pins' mode is output

def destroy():
	GPIO.cleanup()

# using channel = 0 as default for backwards compatibility
def getResult(channel=0):     				# Get ADC result, input channal
		GPIO.setup(ADC_DIO, GPIO.OUT)
		GPIO.output(ADC_CS, 0)

		GPIO.output(ADC_CLK, 0)
		GPIO.output(ADC_DIO, 1);  time.sleep(0.000002)
		GPIO.output(ADC_CLK, 1);  time.sleep(0.000002)
		GPIO.output(ADC_CLK, 0)

		GPIO.output(ADC_DIO, 1);  time.sleep(0.000002)
		GPIO.output(ADC_CLK, 1);  time.sleep(0.000002)
		GPIO.output(ADC_CLK, 0)

		GPIO.output(ADC_DIO, channel);  time.sleep(0.000002)

		GPIO.output(ADC_CLK, 1)
		GPIO.output(ADC_DIO, 1);  time.sleep(0.000002)
		GPIO.output(ADC_CLK, 0)
		GPIO.output(ADC_DIO, 1);  time.sleep(0.000002)

		dat1 = 0
		for i in range(0, 8):
			GPIO.output(ADC_CLK, 1);  time.sleep(0.000002)
			GPIO.output(ADC_CLK, 0);  time.sleep(0.000002)
			GPIO.setup(ADC_DIO, GPIO.IN)
			dat1 = dat1 << 1 | GPIO.input(ADC_DIO)

		dat2 = 0
		for i in range(0, 8):
			dat2 = dat2 | GPIO.input(ADC_DIO) << i
			GPIO.output(ADC_CLK, 1);  time.sleep(0.000002)
			GPIO.output(ADC_CLK, 0);  time.sleep(0.000002)

		GPIO.output(ADC_CS, 1)
		GPIO.setup(ADC_DIO, GPIO.OUT)

		if dat1 == dat2:
			return dat1
		else:
			return 0

def getResult1():
    return getResult(1)


def loop():
	while True:
                res0 = getResult(0)
		res1 = getResult(1)
		print 'res0 = %d, res1 = %d' % (res0,res1)
		time.sleep(0.4)

if __name__ == '__main__':		# Program start from here
	setup()
	try:
		loop()
	except KeyboardInterrupt:  	# When 'Ctrl+C' is pressed, the child program destroy() will be  executed.
		destroy()