UmberHubManager/api/examples/python/rdo_test_cli

RDO Test CLI

This example is designed to test Fixed PDOs of known USB PD power supplies.

The test validates:

• PDO values reported by the connected power supply match expected values
• RDO requests are accepted and result in the expected voltage levels

Load testing of the PDOs is left as an exercise to the reader.

Supported Power Supplies

Power Supply	Voltage Levels
Nekteck	5V, 9V, 15V, 20V
HKY100W	5V, 9V, 12V, 15V, 20V
Apple61W	5V, 9V, 15V, 20V
Apple96W	5V, 9V, 15V, 20V
Apple140W	5V, 9V, 15V, 20V
Samsung45W	5V, 9V, 15V, 20V
Samsung25W	5V, 9V
PD45W	5V, 9V, 15V, 20V

Note: Additional power supplies can be added by modifying the POWER_SUPPLY_CONFIGS dictionary in power_supply_configs.py.

Hardware Setup

Note: Configuration assumes a device with its default settings. If your device has been significantly changed from the default it might be worthwhile doing a factory reset.

• Upstream connection: "Port 0" connected to host
• Power supply: 100W USB-C power supply connected to "Power C" port or an Unregulated connection.
• Device under test: PD power supply connected to the test port.

Note: If the DUT power supply is >= the "Power Supply" then an unregulated connection will be required for best results.

Software Setup

1. Create a virtual environment:

   python -m venv venv
   

2. Activate the virtual environment:

   # macOS/Linux
   source venv/bin/activate
   
   # Windows
   venv\Scripts\activate
   

3. Install BrainStem:

   pip install brainstem
   

Example Usage

Detailed Help:

python rdo_test_cli.py --help

Extended Help (from README):

python rdo_test_cli.py --help_extended

Test HKY power supply on port 5:

python rdo_test_cli.py --test_port 5 --dut HKY100W

Test Nekteck power supply on port 4:

python rdo_test_cli.py --test_port 4 --dut Nekteck

Test PD45W power supply on port 3:

python rdo_test_cli.py --test_port 3 --dut PD45W

Connect to a specific device by serial number:

python rdo_test_cli.py --test_port 5 --dut HKY100W --sn 0x12345678

Exit Codes

Code	Name	Description
0	SUCCESS	All tests passed
1	CONNECTION_ERROR	Failed to connect to device
2	CAPABILITY_CHECK_FAILED	Device does not support required capabilities
3	PDO_TEST_FAILED	One or more PDO tests failed
4	RDO_TEST_FAILED	One or more RDO tests failed
5	PORT_DISABLE_FAILED	Failed to disable port
6	PORT_ENABLE_FAILED	Failed to enable port

Adding New Power Supplies

To add support for a new power supply:

1. Connect the power supply and run the script with an existing DUT configuration
2. Note the actual PDO values reported in the output
3. Use HubTool to find:
   • KEY_EXPECTED_HOST_PDOS_VOLTAGE: Look at "Power Data Object: Remote Source" and convert voltage to microvolts (µV)
   • KEY_EXPECTED_RDOS: Select the "Object Position" for each index and copy the "Raw" value
4. Add a new entry to POWER_SUPPLY_CONFIGS in power_supply_configs.py

Note: RDOs can be created programmatically, but this requires a deep understanding of the PD protocol and is beyond the scope of this example.