def est1_on_t(self, b, c):
'''estimates how long it takes from the current state to
bending power supply on, depending on cabinet state c and
power supply state b.
'''
if c in CAB_ON_T:
t = CAB_ON_T[c]
if b in BEND_ON_T:
return t+BEND_ON_T[b]
else:
msg = 'can not switch on power supply when in state [%02x,%02x]' % (b,c)
raise PS.PS_Exception(msg)
else:
msg = 'can not switch on cabinet when in state [%02x,%02x]' % (b,c)
raise PS.PS_Exception(msg)
def check_waveform(self, dat):
"""Generates exception when trying to transmit values that are out of
valid range, which is given by PT_MAX (two times the nominal value).
"""
max_dat = max(dat)
if max_dat > PT_MAX:
idx = dat.index(max_dat)
msg = 'waveform point %d too big: %d > %d' % (idx, max_dat, PT_MAX)
raise PS.PS_Exception(msg)
min_dat = min(dat)
if min_dat < PT_MIN:
idx = dat.index(min_dat)
msg = 'waveform point %d too small: %d < %d' % (idx, min_dat, PT_MIN)
raise PS.PS_Exception(msg)
def get_mac(self):
aval = self['MachineState']
if aval.quality==AQ_VALID:
return aval.value, None
else:
name = self.get_name().split('/')[-1]
raise PS.PS_Exception('failure to get valid state id for %s' % name)
def upload(self, ch, maxlen=None):
'''reads waveform from hardware, discarding the last point.
since the server appends a copy of the first point to then end.
'''
sok = self.sok
if not sok.is_connected:
raise PS.PS_Exception('not connected')
cmd_start_ul = 'u'+str(ch)+TERM
wave = deque()
tmout = AVG_TIME_PER_SAMPLE*maxlen + TIME_BASE
self.log.debug('starting upload %s, timeout %s', ch, tmout)
start_t = time()
self.sok.write(cmd_start_ul)
if maxlen is None: maxlen = MAX_WAVE_LEN
self.sok.timeout = tmout
try_again = True
while True:
payload = self.sok.readline().strip()
if payload.startswith('ok'):
break
elif payload == 'er08' and try_again:
self.log.debug('was busy, trying again')
try_again = False
self.sok.write(cmd_start_ul)
continue
elif payload.startswith('e'):
raise WaveformException(payload)
elif payload == '':
self.sok.disconnect_exc()
raise PS.PS_Exception('disconnected from wave loader')
else:
try:
wave.append(int(payload))
except Exception:
raise PS.PS_Exception('strange payload %r in upload, read %d points so far' % (payload, len(wave)))
self._duration = time()-start_t
wave = tuple(wave)
if maxlen and maxlen<len(wave):
msg = 'upload yielded %d points, expected maximal %d' % (len(wave), maxlen)
raise PS.PS_Exception(msg)
self.log.debug('upload time %s s for %s pt', self._duration, len(wave))
return wave
def connect(self, host, type_hint=0):
'''Tells where to connect to. The actual connecting is done by reconnect.
'''
if not host:
raise PS.PS_Exception('no IpAddress configured')
self.log.info('connecting to ' + host)
self.comm.connect(host, DEFAULT_EC_PORT, connect=False)
self.type_hint = type_hint
def run(self, impl, wavl):
was_power_on = impl.is_power_on()
impl.ramp_off()
if impl.is_ramping():#it would have to have change to 'off' with ramp_off() call
raise PS.PS_Exception('Trying to download a waveform when ramping')
rval = wavl.download(self.port, self.data)
impl.push_wave_down(self.wave)
if was_power_on: impl.On()
return rval
def _command(self, cmd):
'''Executes a single command.
this command is not thread-safe!
'''
if not self.comm.is_connected:
traceback.print_exc()
raise PS.PS_Exception('control %s not connected' % self.comm.hopo)
cmd = cmd.upper().strip()
COM = self.comm
txt = cmd + "\r"
response = None
self.command_counter += 1
# retries CAN bus commands COMMAND_RETRY times
for r in range(COMMAND_RETRY):
# communication pause before retry
command_pause_retry(r)
COM.write(txt)
response = COM.readline()
# indicates TCP socket timeout
if not response:
self.command_timeout += 1
self.log.debug("timed out reading")
msg = "timed out waiting %s for responding to %s" % \
(self.comm.hopo, cmd)
raise PS.PS_Exception(msg)
if response[0] == '*':
self.capture_can_bus_timeout(cmd)
else:
break
if response[0] == '*':
self.raise_can_bus_timeout(cmd)
payload = response.strip()
if payload.startswith("E"):
if payload in ERROR_RESPONSE:
msg = ERROR_RESPONSE[payload] % dict(
cmd=cmd, port=self.active_port) + " (" + payload + ")"
else:
msg = payload
raise PS.PS_Exception(msg)
return payload
def write_attribute(self, attr):
try:
if time()<self.next_update_t:
raise PS.PS_Exception('devices proxies are not available')
aname = attr.get_name()
data = attr.get_write_value()
self.bend1.write_attribute_asynch(aname, data, nop)
self.bend2.write_attribute_asynch(aname, data, nop)
except Tg.DevFailed:
self.delay_update()
def download(self, ch, wave):
'''Transmits waveform to control unit.
'''
if not self.sok.is_connected:
raise PS.PS_Exception('not connected')
wave = tuple(int(w) for w in wave)
tmout = self.sok.timeout
self.log.debug('starting download %s, timeout %s s', ch, tmout)
self.sok.timeout = self.sok.read_timeout
start_dl_cmd = 'd'+str(ch)+TERM
self.sok.write(start_dl_cmd)
buf = ''.join(str(w)+TERM for w in wave) + ';' + TERM
self.log.debug('buf contains %d characters' % len(buf))
start_t = time()
self.sok.timeout = AVG_TIME_PER_SAMPLE * len(wave) + TIME_BASE
self.sok.write(buf)
ret = self.sok.readline().strip()
if not ret.startswith('ok'):
raise WaveformException(ret)
duration = time()-start_t
self.log.info('download {0} finished after {1} s'.format(ch, duration))
if self.verify:
self.log.debug('verifying...')
success = False
else:
success = True
for r in range(1,1+self.verify):
upstart_t = time()
wup = self.upload(ch,len(wave))
up_duration = time()-upstart_t
if tuple(wup)==tuple(wave):
self.log.info('verification succeeded at {0}. attempt'.format(r))
success = True
break
else:
self.log.warn('verification failed, attempt {0}'.format(r))
dump_to_file(self, wup, wave, r)
if not success:
raise LoadException('verification failed')
self._duration = duration
return ret
def power_off(self):
"""Switches cabinet off.
"""
self.log.error('can not turn off cabinet without relay board')
raise PS.PS_Exception('cabinet without relay boards are always on.')
def write_f(inst, wattr):
if not self.writeable:
raise PS.PS_Exception('tuning regulation parameters disabled')
write_value = wattr.get_write_value()
inst.obj_set(rp.cobj, index, repr(write_value))