ac_power¶

Source code: ac_power.py

A test to ensure the power type and status of device under test.

Description¶

The test detects the power type of the underlying device. It is also used to ask operator to unplug the AC from the device.

To test if plugged AC power is detected properly:

Plug the designated power source to the device, and unplug all the other power sources.
Starts the test.

To test AC power unplugged:

For plugged with required power range: - Need a USB PD power source with required power range.

To test AC unplugged, add this to test list:

{
  "pytest_name": "ac_power",
  "args": {
    "online": false
  }
}

To test USBPD 45W plugged on usbpd port 0:

{
  "pytest_name": "ac_power",
  "args": {
    "power_type": "USB_PD",
    "usbpd_power_range": [0, 45, 45],
    "online": true
  }
}

Name	Type	Description
power_type	str, None	(optional; default: `None`) Type of the power source
usbpd_power_range	list, None	(optional; default: `None`) The required power usbpd power range [usbpd_port, min, max]
online	bool	(optional; default: `True`) True if expecting AC power
bft_fixture	dict, None	(optional; default: `None`) A dictionary with the following items: `class_name` Fully-qualified class name of the BFTFixture implementation to use. `params` A dictionary of parameters for the BFTFixture class’s `Init()` method. The default value of `None` means that no BFT fixture is used.
retries	int, None	(optional; default: `None`) Maximum number of retries allowed to pass the test. 0 means only probe once. Default None means probe forever.
polling_period_secs	Real	(optional; default: `1`) Polling period in seconds.
silent_warning	int	(optional; default: `2`) Skips first N charger type mismatch before giving a warning. Because EC needs about 1.6 seconds to identify charger type after it is plugged in, it skips first N mismatched probe.