blob: ab74c6e5f22c12e532f2900a5fdd8dbd1f37f792 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
|
import time
import RPi.GPIO as GPIO
GPIO.setmode(GPIO.BCM)
PIN_CLK = 2
PIN_DATA = 3
PIN_CS = 4
delay = 0.0000005
# pin setup done here
try:
GPIO.setup(PIN_CLK,GPIO.OUT)
GPIO.setup(PIN_DATA,GPIO.IN)
GPIO.setup(PIN_CS,GPIO.OUT)
GPIO.output(PIN_CS,1)
GPIO.output(PIN_CLK,1)
except:
print("ERROR. Unable to setup the configuration requested")
#wait some time to start
time.sleep(0.5)
print("GPIO configuration enabled")
def clockup():
GPIO.output(PIN_CLK,1)
def clockdown():
GPIO.output(PIN_CLK,0)
def readpos():
GPIO.output(PIN_CS,0) #pulls low to start
time.sleep(delay*2)
data = 0
clockdown()
time1=time.clock()
for i in range(0,10): #bitcount):
clockup() #375 ns between each
data<<=1
data|=GPIO.input(PIN_DATA)
#while(time.clock()-time1<minReadValue);
clockdown()
print(time.clock()-time1)
GPIO.output(PIN_CS,1) #pull high after finish
return data
try:
while(1):
print(readpos())
time.sleep(0.001)
#break
finally:
print("cleaning up GPIO")
GPIO.cleanup()
|
