| Index: tools/telemetry/telemetry/internal/platform/profiler/monsoon.py
|
| diff --git a/tools/telemetry/telemetry/internal/platform/profiler/monsoon.py b/tools/telemetry/telemetry/internal/platform/profiler/monsoon.py
|
| deleted file mode 100644
|
| index 72425f7f688857946b8f93f5b25393c649cdb08d..0000000000000000000000000000000000000000
|
| --- a/tools/telemetry/telemetry/internal/platform/profiler/monsoon.py
|
| +++ /dev/null
|
| @@ -1,292 +0,0 @@
|
| -# Copyright 2013 The Chromium Authors. All rights reserved.
|
| -# Use of this source code is governed by a BSD-style license that can be
|
| -# found in the LICENSE file.
|
| -
|
| -"""Interface for a USB-connected Monsoon power meter.
|
| -
|
| -http://msoon.com/LabEquipment/PowerMonitor/
|
| -Currently Unix-only. Relies on fcntl, /dev, and /tmp.
|
| -"""
|
| -
|
| -import collections
|
| -import logging
|
| -import os
|
| -import select
|
| -import struct
|
| -import time
|
| -
|
| -import serial # pylint: disable=import-error,no-name-in-module
|
| -import serial.tools.list_ports # pylint: disable=import-error,no-name-in-module
|
| -
|
| -
|
| -Power = collections.namedtuple('Power', ['amps', 'volts'])
|
| -
|
| -
|
| -class Monsoon(object):
|
| - """Provides a simple class to use the power meter.
|
| -
|
| - mon = monsoon.Monsoon()
|
| - mon.SetVoltage(3.7)
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| - mon.StartDataCollection()
|
| - mydata = []
|
| - while len(mydata) < 1000:
|
| - mydata.extend(mon.CollectData())
|
| - mon.StopDataCollection()
|
| - """
|
| -
|
| - def __init__(self, device=None, serialno=None, wait=True):
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| - """Establish a connection to a Monsoon.
|
| -
|
| - By default, opens the first available port, waiting if none are ready.
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| - A particular port can be specified with 'device', or a particular Monsoon
|
| - can be specified with 'serialno' (using the number printed on its back).
|
| - With wait=False, IOError is thrown if a device is not immediately available.
|
| - """
|
| - assert float(serial.VERSION) >= 2.7, \
|
| - 'Monsoon requires pyserial v2.7 or later. You have %s' % serial.VERSION
|
| -
|
| - self._coarse_ref = self._fine_ref = self._coarse_zero = self._fine_zero = 0
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| - self._coarse_scale = self._fine_scale = 0
|
| - self._last_seq = 0
|
| - self._voltage_multiplier = None
|
| -
|
| - if device:
|
| - self.ser = serial.Serial(device, timeout=1)
|
| - return
|
| -
|
| - while 1:
|
| - for (port, desc, _) in serial.tools.list_ports.comports():
|
| - if not desc.lower().startswith('mobile device power monitor'):
|
| - continue
|
| - tmpname = '/tmp/monsoon.%s.%s' % (os.uname()[0], os.path.basename(port))
|
| - self._tempfile = open(tmpname, 'w')
|
| - try: # Use a lockfile to ensure exclusive access.
|
| - # Put the import in here to avoid doing it on unsupported platforms.
|
| - import fcntl # pylint: disable=import-error
|
| - fcntl.lockf(self._tempfile, fcntl.LOCK_EX | fcntl.LOCK_NB)
|
| - except IOError:
|
| - logging.error('device %s is in use', port)
|
| - continue
|
| -
|
| - try: # Try to open the device.
|
| - self.ser = serial.Serial(port, timeout=1)
|
| - self.StopDataCollection() # Just in case.
|
| - self._FlushInput() # Discard stale input.
|
| - status = self.GetStatus()
|
| - except IOError, e:
|
| - logging.error('error opening device %s: %s', port, e)
|
| - continue
|
| -
|
| - if not status:
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| - logging.error('no response from device %s', port)
|
| - elif serialno and status['serialNumber'] != serialno:
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| - logging.error('device %s is #%d', port, status['serialNumber'])
|
| - else:
|
| - if status['hardwareRevision'] == 1:
|
| - self._voltage_multiplier = 62.5 / 10**6
|
| - else:
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| - self._voltage_multiplier = 125.0 / 10**6
|
| - return
|
| -
|
| - self._tempfile = None
|
| - if not wait:
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| - raise IOError('No device found')
|
| - logging.info('waiting for device...')
|
| - time.sleep(1)
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| -
|
| - def GetStatus(self):
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| - """Requests and waits for status. Returns status dictionary."""
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| -
|
| - # status packet format
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| - STATUS_FORMAT = '>BBBhhhHhhhHBBBxBbHBHHHHBbbHHBBBbbbbbbbbbBH'
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| - STATUS_FIELDS = [
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| - 'packetType', 'firmwareVersion', 'protocolVersion',
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| - 'mainFineCurrent', 'usbFineCurrent', 'auxFineCurrent', 'voltage1',
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| - 'mainCoarseCurrent', 'usbCoarseCurrent', 'auxCoarseCurrent', 'voltage2',
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| - 'outputVoltageSetting', 'temperature', 'status', 'leds',
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| - 'mainFineResistor', 'serialNumber', 'sampleRate',
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| - 'dacCalLow', 'dacCalHigh',
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| - 'powerUpCurrentLimit', 'runTimeCurrentLimit', 'powerUpTime',
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| - 'usbFineResistor', 'auxFineResistor',
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| - 'initialUsbVoltage', 'initialAuxVoltage',
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| - 'hardwareRevision', 'temperatureLimit', 'usbPassthroughMode',
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| - 'mainCoarseResistor', 'usbCoarseResistor', 'auxCoarseResistor',
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| - 'defMainFineResistor', 'defUsbFineResistor', 'defAuxFineResistor',
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| - 'defMainCoarseResistor', 'defUsbCoarseResistor', 'defAuxCoarseResistor',
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| - 'eventCode', 'eventData',
|
| - ]
|
| -
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| - self._SendStruct('BBB', 0x01, 0x00, 0x00)
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| - while 1: # Keep reading, discarding non-status packets.
|
| - data = self._ReadPacket()
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| - if not data:
|
| - return None
|
| - if len(data) != struct.calcsize(STATUS_FORMAT) or data[0] != '\x10':
|
| - logging.debug('wanted status, dropped type=0x%02x, len=%d',
|
| - ord(data[0]), len(data))
|
| - continue
|
| -
|
| - status = dict(zip(STATUS_FIELDS, struct.unpack(STATUS_FORMAT, data)))
|
| - assert status['packetType'] == 0x10
|
| - for k in status.keys():
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| - if k.endswith('VoltageSetting'):
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| - status[k] = 2.0 + status[k] * 0.01
|
| - elif k.endswith('FineCurrent'):
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| - pass # Needs calibration data.
|
| - elif k.endswith('CoarseCurrent'):
|
| - pass # Needs calibration data.
|
| - elif k.startswith('voltage') or k.endswith('Voltage'):
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| - status[k] = status[k] * 0.000125
|
| - elif k.endswith('Resistor'):
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| - status[k] = 0.05 + status[k] * 0.0001
|
| - if k.startswith('aux') or k.startswith('defAux'):
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| - status[k] += 0.05
|
| - elif k.endswith('CurrentLimit'):
|
| - status[k] = 8 * (1023 - status[k]) / 1023.0
|
| - return status
|
| -
|
| -
|
| - def SetVoltage(self, v):
|
| - """Set the output voltage, 0 to disable."""
|
| - if v == 0:
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| - self._SendStruct('BBB', 0x01, 0x01, 0x00)
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| - else:
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| - self._SendStruct('BBB', 0x01, 0x01, int((v - 2.0) * 100))
|
| -
|
| - def SetStartupCurrent(self, a):
|
| - """Set the max startup output current. the unit of |a| : Amperes """
|
| - assert a >= 0 and a <= 8
|
| -
|
| - val = 1023 - int((a/8.0)*1023)
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| - self._SendStruct('BBB', 0x01, 0x08, val & 0xff)
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| - self._SendStruct('BBB', 0x01, 0x09, val >> 8)
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| -
|
| - def SetMaxCurrent(self, a):
|
| - """Set the max output current. the unit of |a| : Amperes """
|
| - assert a >= 0 and a <= 8
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| -
|
| - val = 1023 - int((a/8.0)*1023)
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| - self._SendStruct('BBB', 0x01, 0x0a, val & 0xff)
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| - self._SendStruct('BBB', 0x01, 0x0b, val >> 8)
|
| -
|
| - def SetUsbPassthrough(self, val):
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| - """Set the USB passthrough mode: 0 = off, 1 = on, 2 = auto."""
|
| - self._SendStruct('BBB', 0x01, 0x10, val)
|
| -
|
| -
|
| - def StartDataCollection(self):
|
| - """Tell the device to start collecting and sending measurement data."""
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| - self._SendStruct('BBB', 0x01, 0x1b, 0x01) # Mystery command.
|
| - self._SendStruct('BBBBBBB', 0x02, 0xff, 0xff, 0xff, 0xff, 0x03, 0xe8)
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| -
|
| -
|
| - def StopDataCollection(self):
|
| - """Tell the device to stop collecting measurement data."""
|
| - self._SendStruct('BB', 0x03, 0x00) # Stop.
|
| -
|
| -
|
| - def CollectData(self):
|
| - """Return some current samples. Call StartDataCollection() first."""
|
| - while 1: # Loop until we get data or a timeout.
|
| - data = self._ReadPacket()
|
| - if not data:
|
| - return None
|
| - if len(data) < 4 + 8 + 1 or data[0] < '\x20' or data[0] > '\x2F':
|
| - logging.debug('wanted data, dropped type=0x%02x, len=%d',
|
| - ord(data[0]), len(data))
|
| - continue
|
| -
|
| - seq, packet_type, x, _ = struct.unpack('BBBB', data[:4])
|
| - data = [struct.unpack(">hhhh", data[x:x+8])
|
| - for x in range(4, len(data) - 8, 8)]
|
| -
|
| - if self._last_seq and seq & 0xF != (self._last_seq + 1) & 0xF:
|
| - logging.info('data sequence skipped, lost packet?')
|
| - self._last_seq = seq
|
| -
|
| - if packet_type == 0:
|
| - if not self._coarse_scale or not self._fine_scale:
|
| - logging.info('waiting for calibration, dropped data packet')
|
| - continue
|
| -
|
| - out = []
|
| - for main, usb, _, voltage in data:
|
| - main_voltage_v = self._voltage_multiplier * (voltage & ~3)
|
| - sample = 0.0
|
| - if main & 1:
|
| - sample += ((main & ~1) - self._coarse_zero) * self._coarse_scale
|
| - else:
|
| - sample += (main - self._fine_zero) * self._fine_scale
|
| - if usb & 1:
|
| - sample += ((usb & ~1) - self._coarse_zero) * self._coarse_scale
|
| - else:
|
| - sample += (usb - self._fine_zero) * self._fine_scale
|
| - out.append(Power(sample, main_voltage_v))
|
| - return out
|
| -
|
| - elif packet_type == 1:
|
| - self._fine_zero = data[0][0]
|
| - self._coarse_zero = data[1][0]
|
| -
|
| - elif packet_type == 2:
|
| - self._fine_ref = data[0][0]
|
| - self._coarse_ref = data[1][0]
|
| -
|
| - else:
|
| - logging.debug('discarding data packet type=0x%02x', packet_type)
|
| - continue
|
| -
|
| - if self._coarse_ref != self._coarse_zero:
|
| - self._coarse_scale = 2.88 / (self._coarse_ref - self._coarse_zero)
|
| - if self._fine_ref != self._fine_zero:
|
| - self._fine_scale = 0.0332 / (self._fine_ref - self._fine_zero)
|
| -
|
| -
|
| - def _SendStruct(self, fmt, *args):
|
| - """Pack a struct (without length or checksum) and send it."""
|
| - data = struct.pack(fmt, *args)
|
| - data_len = len(data) + 1
|
| - checksum = (data_len + sum(struct.unpack('B' * len(data), data))) % 256
|
| - out = struct.pack('B', data_len) + data + struct.pack('B', checksum)
|
| - self.ser.write(out)
|
| -
|
| -
|
| - def _ReadPacket(self):
|
| - """Read a single data record as a string (without length or checksum)."""
|
| - len_char = self.ser.read(1)
|
| - if not len_char:
|
| - logging.error('timeout reading from serial port')
|
| - return None
|
| -
|
| - data_len = struct.unpack('B', len_char)
|
| - data_len = ord(len_char)
|
| - if not data_len:
|
| - return ''
|
| -
|
| - result = self.ser.read(data_len)
|
| - if len(result) != data_len:
|
| - return None
|
| - body = result[:-1]
|
| - checksum = (data_len + sum(struct.unpack('B' * len(body), body))) % 256
|
| - if result[-1] != struct.pack('B', checksum):
|
| - logging.error('invalid checksum from serial port')
|
| - return None
|
| - return result[:-1]
|
| -
|
| - def _FlushInput(self):
|
| - """Flush all read data until no more available."""
|
| - self.ser.flush()
|
| - flushed = 0
|
| - while True:
|
| - ready_r, _, ready_x = select.select([self.ser], [], [self.ser], 0)
|
| - if len(ready_x) > 0:
|
| - logging.error('exception from serial port')
|
| - return None
|
| - elif len(ready_r) > 0:
|
| - flushed += 1
|
| - self.ser.read(1) # This may cause underlying buffering.
|
| - self.ser.flush() # Flush the underlying buffer too.
|
| - else:
|
| - break
|
| - if flushed > 0:
|
| - logging.debug('dropped >%d bytes', flushed)
|
|
|