NAME
    `Device::Chip::INA219' - chip driver for an INA219

DESCRIPTION
    This Device::Chip subclass provides specific communication to a Texas
    Instruments INA219 attached to a computer via an I²C adapter.

    The reader is presumed to be familiar with the general operation of this
    chip; the documentation here will not attempt to explain or define
    chip-specific concepts or features, only the use of this module to
    access them.

METHODS
    The following methods documented with a trailing call to `->get' return
    Future instances.

  read_config
       $config = $ina->read_config->get

    Reads and returns the current chip configuration as a `HASH' reference.

  change_config
       $ina->change_config( %config )->get

    Changes the configuration. Any field names not mentioned will be
    preserved.

  read_shunt_voltage
       $uv = $ina->read_shunt_voltage->get

    Returns the current shunt voltage reading scaled integer in microvolts.

  read_bus_voltage
       $mv = $ina->read_bus_voltage->get

       ( $mv, $ovf, $cnvr ) = $ina->read_bus_voltage->get

    Returns the current bus voltage reading, as a scaled integer in
    milivolts.

    The returned Future also yields the OVF and CNVR flags.

AUTHOR
    Paul Evans <leonerd@leonerd.org.uk>

