64 lines
2.6 KiB
Python
64 lines
2.6 KiB
Python
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# Lint as: python2, python3
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# Copyright 2021 The Chromium OS Authors. All rights reserved.
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# Use of this source code is governed by a BSD-style license that can be
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# found in the LICENSE file.
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"""Server side Bluetooth range vs rate tests."""
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from __future__ import absolute_import
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from __future__ import division
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from __future__ import print_function
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import logging
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import common
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from autotest_lib.client.common_lib import error
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from autotest_lib.server.cros.bluetooth.bluetooth_adapter_tests import (
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BluetoothAdapterTests)
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from six.moves import range
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class BluetoothAdapterRvRTests(BluetoothAdapterTests):
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"""Server side Bluetooth adapter audio test class."""
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def check_rssi_vs_attenuation(self, device, bt_attenuator):
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"""
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@param device: Object representing the peer device
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@param bt_attenuator: Object representing the controllable variable attenuator
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@returns: Dict containing attenuation:rssi values. Empty on failure
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This function keeps measuring the rssi while increasing the attenuation.
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At some point the device discovery will fail, which is expected. So this
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failure is ignored and self.fails cleared.
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This should not be run in a batch
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"""
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try:
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fixed_attenuation = bt_attenuator.get_minimal_total_attenuation()
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logging.debug('Fixed attentuation is %s', fixed_attenuation)
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final_attenuation = 100 # Maximum attenuation
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freq = 2427 # Frequency used to calculate total attenuation
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rssi_dict = {}
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for attn in range(fixed_attenuation, final_attenuation):
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logging.debug('Setting attenuation to %s', attn)
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bt_attenuator.set_total_attenuation(attn, freq)
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device.SetDiscoverable(True)
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try:
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rssi = self.get_device_sample_rssi(device,
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use_cached_value=False)
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except error.TestFail as e:
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# test_discover_device might fail if RSSI is too low
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logging.debug(
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'get_device_sample rssi failed with %s.'
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'This is expected if RSSI is too low', str(e))
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self.fails = []
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break
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logging.info('Total attenuation is %s RSSI is %s', attn, rssi)
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rssi_dict[attn] = rssi
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return rssi_dict
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except Exception as e:
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logging.error('Exception in check_rssi_vs_attenuation %s', str(e))
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return {}
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finally:
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bt_attenuator.set_variable_attenuation(0)
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