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) |
- mon.StartDataCollection() |
- mydata = [] |
- while len(mydata) < 1000: |
- mydata.extend(mon.CollectData()) |
- mon.StopDataCollection() |
- """ |
- |
- def __init__(self, device=None, serialno=None, wait=True): |
- """Establish a connection to a Monsoon. |
- |
- By default, opens the first available port, waiting if none are ready. |
- 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 |
- 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: |
- logging.error('no response from device %s', port) |
- elif serialno and status['serialNumber'] != serialno: |
- logging.error('device %s is #%d', port, status['serialNumber']) |
- else: |
- if status['hardwareRevision'] == 1: |
- self._voltage_multiplier = 62.5 / 10**6 |
- else: |
- self._voltage_multiplier = 125.0 / 10**6 |
- return |
- |
- self._tempfile = None |
- if not wait: |
- raise IOError('No device found') |
- logging.info('waiting for device...') |
- time.sleep(1) |
- |
- def GetStatus(self): |
- """Requests and waits for status. Returns status dictionary.""" |
- |
- # status packet format |
- STATUS_FORMAT = '>BBBhhhHhhhHBBBxBbHBHHHHBbbHHBBBbbbbbbbbbBH' |
- STATUS_FIELDS = [ |
- 'packetType', 'firmwareVersion', 'protocolVersion', |
- 'mainFineCurrent', 'usbFineCurrent', 'auxFineCurrent', 'voltage1', |
- 'mainCoarseCurrent', 'usbCoarseCurrent', 'auxCoarseCurrent', 'voltage2', |
- 'outputVoltageSetting', 'temperature', 'status', 'leds', |
- 'mainFineResistor', 'serialNumber', 'sampleRate', |
- 'dacCalLow', 'dacCalHigh', |
- 'powerUpCurrentLimit', 'runTimeCurrentLimit', 'powerUpTime', |
- 'usbFineResistor', 'auxFineResistor', |
- 'initialUsbVoltage', 'initialAuxVoltage', |
- 'hardwareRevision', 'temperatureLimit', 'usbPassthroughMode', |
- 'mainCoarseResistor', 'usbCoarseResistor', 'auxCoarseResistor', |
- 'defMainFineResistor', 'defUsbFineResistor', 'defAuxFineResistor', |
- 'defMainCoarseResistor', 'defUsbCoarseResistor', 'defAuxCoarseResistor', |
- 'eventCode', 'eventData', |
- ] |
- |
- self._SendStruct('BBB', 0x01, 0x00, 0x00) |
- while 1: # Keep reading, discarding non-status packets. |
- data = self._ReadPacket() |
- 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(): |
- if k.endswith('VoltageSetting'): |
- status[k] = 2.0 + status[k] * 0.01 |
- elif k.endswith('FineCurrent'): |
- pass # Needs calibration data. |
- elif k.endswith('CoarseCurrent'): |
- pass # Needs calibration data. |
- elif k.startswith('voltage') or k.endswith('Voltage'): |
- status[k] = status[k] * 0.000125 |
- elif k.endswith('Resistor'): |
- status[k] = 0.05 + status[k] * 0.0001 |
- if k.startswith('aux') or k.startswith('defAux'): |
- 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: |
- self._SendStruct('BBB', 0x01, 0x01, 0x00) |
- else: |
- 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) |
- self._SendStruct('BBB', 0x01, 0x08, val & 0xff) |
- self._SendStruct('BBB', 0x01, 0x09, val >> 8) |
- |
- def SetMaxCurrent(self, a): |
- """Set the max output current. the unit of |a| : Amperes """ |
- assert a >= 0 and a <= 8 |
- |
- val = 1023 - int((a/8.0)*1023) |
- self._SendStruct('BBB', 0x01, 0x0a, val & 0xff) |
- self._SendStruct('BBB', 0x01, 0x0b, val >> 8) |
- |
- def SetUsbPassthrough(self, val): |
- """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.""" |
- self._SendStruct('BBB', 0x01, 0x1b, 0x01) # Mystery command. |
- self._SendStruct('BBBBBBB', 0x02, 0xff, 0xff, 0xff, 0xff, 0x03, 0xe8) |
- |
- |
- 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) |