First Time Setup

For first time setup we need to create a virtual environment, enter it, and install dependencies. These steps have consolidated into a start script.

source start_venv.sh

Install venv if missing:

If venv is missing, install the package with:

sudo apt-get install python3-venv

Exit Virtual Environment

Exit the virtual environment using the deactivate command.

(.venv) ~/chromiumos/src/third_party/dolos/battery $ deactivate
~/chromiumos/src/third_party/dolos/batterydata $

Optional: Setup crosfleet and SSH access:

https://goto.google.com/crosfleet-cli https://goto.google.com/chromeos-lab-duts-ssh

Importing Battery Information

(.venv) $ dolos_load_battery  --help
usage: dolos_load_battery [-h] (-s SSH | -i) [-p I2C_PORT] -f FILE [-c COMMENT] [-v]

options:
  -h, --help   show this help message and exit
  -s SSH       Use SSH and ECTool to extract registers from a remote DUT
  -i           Use a FTDI board to extract registers from an unplugged battery
  -p I2C_PORT  Configure ECTool's I2C port if I2C_PORT_BATTERY is known
  -f FILE      File path to export yaml data
  -c COMMENT   Comment data
  -v           Enable verbose logging

Steps to extract battery data from the Fleet

Find checkout MODEL with crosfleet and identify the DUT_HOSTNAME field.

crosfleet dut lease -model $MODEL

Example:

crosfleet dut lease -model pico
Verifying the provided DUT dimensions...
Found 45 DUT(s) (39 busy) matching the provided DUT dimensions
...
DUT_HOSTNAME=chromeos8-row10-rack8-host46
MODEL=pico
BOARD=jacuzzi
SERVO_HOSTNAME=chromeos8-row10-rack8-labstation6
SERVO_PORT=9996
SERVO_SERIAL=SERVOV4P1-S-2103240648

Pass the DUT_HOSTNAME Parameter to the dolos_load_battery.py script and specify an OUTPUT path for the yaml data.

dolos_load_battery -s $DUT_HOSTNAME -f $OUTPUT

Example:

(.venv) $ dolos_load_battery -s chromeos8-row10-rack8-host46 -f pico.yaml
INFO - dolos_load_battery.py:252:configure_connections : Connected
INFO - dolos_load_battery.py:176:_configure_port : Detecting port
INFO - dolos_load_battery.py:180:_configure_port : Using port 4
INFO - dolos_load_battery.py:197:load_registers : Loading registers
INFO - dolos_load_battery.py:201:load_registers : Progress 1/40 - Loading 'SB_MANUFACTURER_ACCESS'
...
INFO - dolos_load_battery.py:201:load_registers : Progress 40/40 - Loading 'SB_PACK_STATUS'
INFO - dolos_load_battery.py:209:export_table : Exporting yaml to:PosixPath('test.yaml')

Final steps:

PolarityHigh can not be extracted automatically. We need to test it with full DUT-Cable-Dolos setup to confirm it is correct. It needs to be set to be set to True or False.

PolarityHigh: False

When the DUT is powered on, we can see the correct state using the status command in the Dolos console:

System present     : Absent (signal HIGH, polarity LOW)

If the DUT is active and signal HIGH is reported, we need to adjust the Polarity.

PolarityHigh: True

System present     : Present (signal HIGH, polarity HIGH)

Programming The Cable

We can program the EEPROM in the Dolos cable using a Dolos or FTDI board like the FT4232H. Simply pass the YAML file in and provide fields to specify the date, and polarity.

If the serial field is left empty, it'll preserve the existing serial.

(.venv) $ dolos_program_cable --help
usage: dolos_program_cable [-h] -y YAML (-d DOLOS | -f) [-ns NEW_SERIAL] [-v]

options:
  -h, --help      show this help message and exit
  -y YAML         File path of imported yaml data
  -d DOLOS        Use Dolos to program: 'any' is used if the serial number does not matter.
  -f              Use FTDI to program: Fails if more than 1 device is found.
  -ns NEW_SERIAL  Optional overwrite serial number
  -v              Enable verbose logging

Example using Dolos:

(.venv) $ dolos_program_cable -y pico.yaml -d any
INFO - dolos_program_cable.py:30:load_table : Loading yaml: PosixPath('pico.yaml')
INFO - dolos_program_cable.py:113:read : Reading cable
INFO - dolos_program_cable.py:132:read : Serial 'DOLOSV187-C-120251234'
INFO - dolos_program_cable.py:137:write : Programming cable
INFO - dolos_program_cable.py:142:write : Verifying cable
INFO - dolos_program_cable.py:113:read : Reading cable
INFO - dolos_program_cable.py:132:read : Serial 'DOLOSV187-C-120251234'
INFO - dolos_program_cable.py:145:write : Program success

(.venv) $ dolos_program_cable -y pico.yaml -d DOLOSV3-C-3320241234

Example using FTDI:

(.venv) $ dolos_program_cable -y pico.yaml -f