-
Notifications
You must be signed in to change notification settings - Fork 0
/
ABE_helpers.py
40 lines (36 loc) · 1.38 KB
/
ABE_helpers.py
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
#!/usr/bin/python3
try:
import smbus
except ImportError:
raise ImportError("python-smbus not found Install with 'sudo apt-get install python3-smbus'")
import re
"""
================================================
ABElectronics Python Helper Functions
Version 1.0 Created 29/02/2015
Python 3 only
Requires python 3 smbus to be installed. For more information
about enabling i2c and installing smbus visit
https://www.abelectronics.co.uk/i2c-raspbian-wheezy/info.aspx
================================================
"""
class ABEHelpers:
def get_smbus(self):
# detect i2C port number and assign to i2c_bus
i2c_bus = 0
for line in open('/proc/cpuinfo').readlines():
m = re.match('(.*?)\s*:\s*(.*)', line)
if m:
(name, value) = (m.group(1), m.group(2))
if name == "Revision":
if value[-4:] in ('0002', '0003'):
i2c_bus = 0
else:
i2c_bus = 1
break
try:
return smbus.SMBus(i2c_bus)
except IOError:
print ("Could not open the i2c bus.")
print ("Please check that i2c is enabled and python-smbus and i2c-tools are installed.")
print ("Visit https://www.abelectronics.co.uk/i2c-raspbian-wheezy/info.aspx for more information.")