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import constants
import datetime
import os
import platform
import plistlib
import re
import subprocess
def ReceiverTimeToTime(rtime):
return constants.BASE_TIME + datetime.timedelta(seconds=rtime)
def linux_find_usbserial(vendor, product):
DEV_REGEX = re.compile('^tty(USB|ACM)[0-9]+$')
for usb_dev_root in os.listdir('/sys/bus/usb/devices'):
device_name = os.path.join('/sys/bus/usb/devices', usb_dev_root)
if not os.path.exists(os.path.join(device_name, 'idVendor')):
continue
idv = open(os.path.join(device_name, 'idVendor')).read().strip()
if idv != vendor:
continue
idp = open(os.path.join(device_name, 'idProduct')).read().strip()
if idp != product:
continue
for root, dirs, files in os.walk(device_name):
for option in dirs + files:
if DEV_REGEX.match(option):
return os.path.join('/dev', option)
def osx_find_usbserial(vendor, product):
def recur(v):
if hasattr(v, '__iter__') and 'idVendor' in v and 'idProduct' in v:
if v['idVendor'] == vendor and v['idProduct'] == product:
tmp = v
while True:
if 'IODialinDevice' not in tmp and 'IORegistryEntryChildren' in tmp:
tmp = tmp['IORegistryEntryChildren']
elif 'IODialinDevice' in tmp:
return tmp['IODialinDevice']
else:
break
if type(v) == list:
for x in v:
out = recur(x)
if out is not None:
return out
elif type(v) == dict or issubclass(type(v), dict):
for x in v.values():
out = recur(x)
if out is not None:
return out
sp = subprocess.Popen(['/usr/sbin/ioreg', '-k', 'IODialinDevice',
'-r', '-t', '-l', '-a', '-x'],
stdout=subprocess.PIPE,
stdin=subprocess.PIPE, stderr=subprocess.PIPE)
stdout, _ = sp.communicate()
plist = plistlib.readPlistFromString(stdout)
return recur(plist)
def find_usbserial(vendor, product):
"""Find the tty device for a given usbserial devices identifiers.
Args:
vendor: (int) something like 0x0000
product: (int) something like 0x0000
Returns:
String, like /dev/ttyACM0 or /dev/tty.usb...
"""
if platform.system() == 'Linux':
vendor, product = [('%04x' % (x)).strip() for x in (vendor, product)]
return linux_find_usbserial(vendor, product)
elif platform.system() == 'Darwin':
return osx_find_usbserial(vendor, product)
else:
raise NotImplementedError('Cannot find serial ports on %s'
% platform.system())
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