first commit

examples/orangepi-sensors/dht11.py

@@ -0,0 +1,67 @@
+import wiringpi
+from wiringpi import GPIO
+
+pin = 6
+
+def getval(pin):
+	tl=[]
+	tb=[]
+	wiringpi.wiringPiSetup()
+	wiringpi.pinMode(pin, GPIO.OUTPUT)
+	wiringpi.digitalWrite(pin, GPIO.HIGH)
+	wiringpi.delay(1)
+	wiringpi.digitalWrite(pin, GPIO.LOW)
+	wiringpi.delay(25)
+	wiringpi.digitalWrite(pin, GPIO.HIGH)
+	wiringpi.delayMicroseconds(20)
+	wiringpi.pinMode(pin, GPIO.INPUT)
+	while(wiringpi.digitalRead(pin)==1): pass
+	
+	for i in range(45):
+		tc=wiringpi.micros()
+		'''
+		'''
+		while(wiringpi.digitalRead(pin)==0): pass
+		while(wiringpi.digitalRead(pin)==1):
+			if wiringpi.micros()-tc>500:
+				break
+		if wiringpi.micros()-tc>500:
+			break
+		tl.append(wiringpi.micros()-tc)
+
+	tl=tl[1:]
+	for i in tl:
+		if i>100:
+			tb.append(1)
+		else:
+			tb.append(0)
+	
+	return tb
+
+def GetResult(pin):
+	for i in range(10):
+		SH=0;SL=0;TH=0;TL=0;C=0
+		result=getval(pin)
+
+		if len(result)==40:
+			for i in range(8):
+				SH*=2;SH+=result[i]    # humi Integer
+				SL*=2;SL+=result[i+8]  # humi decimal
+				TH*=2;TH+=result[i+16] # temp Integer
+				TL*=2;TL+=result[i+24] # temp decimal
+				C*=2;C+=result[i+32]   # Checksum
+			if ((SH+SL+TH+TL)%256)==C and C!=0:
+				break
+			else:
+				print("Read Sucess,But checksum error! retrying")
+
+		else:
+			print("Read failer! Retrying")
+			break
+		wiringpi.delay(200)
+	return SH,SL,TH,TL
+
+SH,SL,TH,TL=GetResult(pin)
+print("humi:",SH,SL,"temp:",TH,TL)
+
+