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>