TwistedMind
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- 30.05.2009
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Pokusavam da namestim da USB watchdog radi na raspbianu. U pitanju je onaj standardni sa 2 releja za reset i gasenje.
LINK
Nasao sam ovo, ali ne umem da podesim.
Skripta je sledeca
Probao da pokrenem, shvatam da port nije podesen i tu sam se zaglavio.
Probao sam da pronadjem port preko dmesg | grep tty, ali bez uspeha, odnosno ili nisam nasao pravu stvar ili je ubacujem na pogresno mesto.
Pokusavao sam /dev/ttyS0, /dev/ttyAMA0 i jos neke kombinacije koje su iskakale u dmesg.
port sam ubacivao u deo:
parser.add_argument('port', type=str,
help='Serial port to use (e.g /dev/cu.wchussetila420)')
Umesto 'port'
sta dalje?
LINK
Nasao sam ovo, ali ne umem da podesim.
Skripta je sledeca
Kod:
#!/usr/bin/python
import logging
import sys
import time
import serial
import argparse
import threading
from datetime import timedelta
class UsbWatchDog(object):
def __init__(self, port, heartbeat=10, baud=9600, daemon=True):
self.heartbeat = heartbeat if 10 < heartbeat <= 360 else 10
self.port = port
self.watchdog = serial.Serial(self.port, baud)
if daemon:
run = threading.Thread(target=self.run)
run.daemon = False
run.start()
def _read(self, byte):
try:
self._write(byte)
a = self.read()
print(a)
except Exception as e:
raise Exception('Error while reading: {}'.format(e))
def _write(self, byte):
try:
self.watchdog.write(bytes([byte]))
self.watchdog.flush()
except Exception as e:
raise Exception('Error while writing: {}'.format(e))
def get_info(self):
''' TODO: get current system info
'''
with open('/proc/uptime', 'r') as f:
uptime = float(f.readline().split()[0])
last_boot = str(timedelta(seconds = uptime))
scheduled_restart = 0
info = {
'last_boot':last_boot,
'scheduled_restart': 0,
'timeout':self.heartbeat
}
return info
def run(self):
''' Interval ( in seconds ) = n/10,
This number will always be rounded to the closest integer.
If daemon variable is set, run this as a thread in background
'''
try:
interval = int(self.heartbeat/10)
except Exception as e:
logging.warn("Interval seems invalids. Error {}".format(e))
logging.debug ("Heartbeat configured for {} second(s) intervals"
.format(interval*10))
while True:
logging.debug ("Heartbeat {}".format(interval*10))
self._write(interval)
time.sleep(5)
def reset(self):
''' Restart Now
'''
logging.debug('Restart Now')
try:
self._write(255)
except Exception as e:
print('Error {}'.format(e))
logging.warning('Error {}'.format(e))
def change_timeout_seconds(self, timeout):
''' Change Heartbeat timeout
'''
logging.debug('Changing heart beat from {} to {}'
.format(self.heartbeat, timeout))
try:
self.heartbeat = int(timeout) if 10 < int(timeout) <= 360 else 10
except ValueError as e:
logging.warning('Invalid type, integer is required. Error {}'.format(e))
raise TypeError
def check_internet(self):
''' Test internet connection
'''
import urllib2
try:
urllib2.urlopen('http://google.com', timeout=5)
return True
except urllib2.URLError as e:
return False
if __name__ == '__main__':
logging.basicConfig(level=logging.DEBUG)
parser = argparse.ArgumentParser(
description='Python Script to allow you to control a usb watchdog')
parser.add_argument('port', type=str,
help='Serial port to use (e.g /dev/cu.wchussetila420)')
parser.add_argument('--hb', nargs='?', const=10, type=int,
help='Maximum amount of time without a hearbeat '
'(e.g. 180 seconds). 10 second increments only. '
'Default: 10 seconds, Max: 360')
args = parser.parse_args()
hb = 10 if not args.hb else args.hb
try:
device = UsbWatchDog(args.port, hb, daemon=False)
logging.debug('Device Information {}'.format(device.get_info()))
device.run()
except (KeyboardInterrupt, SystemExit):
logging.warning("Keyboard interrupt")
sys.exit()
Probao da pokrenem, shvatam da port nije podesen i tu sam se zaglavio.
Probao sam da pronadjem port preko dmesg | grep tty, ali bez uspeha, odnosno ili nisam nasao pravu stvar ili je ubacujem na pogresno mesto.
Pokusavao sam /dev/ttyS0, /dev/ttyAMA0 i jos neke kombinacije koje su iskakale u dmesg.
port sam ubacivao u deo:
parser.add_argument('port', type=str,
help='Serial port to use (e.g /dev/cu.wchussetila420)')
Umesto 'port'
sta dalje?
Poslednja izmena: