blob: bf5cb76e123a9b579562bbd174399e29a1ab6020 [file] [log] [blame]
# Copyright 2015 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
"""This is a USB type C charging test using Plankton board."""
import logging
import math
import time
from autotest_lib.client.common_lib import error
from autotest_lib.server.cros.faft.firmware_test import FirmwareTest
from autotest_lib.server.cros.servo import pd_console
class firmware_TypeCCharging(FirmwareTest):
"""USB type C charging test."""
version = 1
def run_once(self):
"""Compares VBUS voltage and current with charging setting.
When charging voltage == 0, Plankton will act as a power sink and draws
5 volts from DUT. Other charging voltage should be seen on USB type C
VBUS INA meter in a 12% range.
When charging voltage == 5, Plankton INA current should be seen around
3 Amps (we set the range among 2 ~ 3.4 Amps just as in factory testing).
Other positive charging votage should not be less than 0 Amp.
@raise TestFail: If VBUS voltage or current is not in range.
self.pd_console_utils = pd_console.PDConsoleUtils(self.plankton)
for charging_voltage in self.plankton.get_charging_voltages():
pd_state = self.pd_console_utils.get_pd_state(0)
if charging_voltage > 0:
expected_state = self.pd_console_utils.SRC_CONNECT
expected_state = self.pd_console_utils.SNK_CONNECT'Plankton state = %s', pd_state)
if pd_state != expected_state:
raise error.TestFail('PD state != expected state, (%s != %s)' %
(pd_state, expected_state))
expected_vbus_voltage = float(
charging_voltage if charging_voltage > 0 else
tolerance = self.VBUS_TOLERANCE * expected_vbus_voltage
vbus_voltage = self.plankton.vbus_voltage
vbus_current = self.plankton.vbus_current'Charging %dV: VBUS V=%f I=%f', charging_voltage,
vbus_voltage, vbus_current)
if math.fabs(expected_vbus_voltage - vbus_voltage) > tolerance:
raise error.TestFail(
'VBUS voltage out of range: %f (%f, delta %f)' %
(vbus_voltage, expected_vbus_voltage, tolerance))
if charging_voltage == 0 and vbus_current > 0:
raise error.TestFail('Failed to consume power from DUT')
if charging_voltage > 0 and vbus_current <= 0:
raise error.Testfail(
'VBUS current less than 0 in %d volt: %f' %
(charging_voltage, vbus_current))
if (charging_voltage == 5 and
(vbus_current < self.VBUS_5V_CURRENT_RANGE[0] or
vbus_current > self.VBUS_5V_CURRENT_RANGE[1])):
raise error.TestFail(
'VBUS current out of range in 5 volt: %f %r' %
(vbus_current, self.VBUS_5V_CURRENT_RANGE))