Device::Chip - an abstraction of a hardware chip IO driver


      Note: this document is currently under heavy development. Details
      will be added, changed, and evolved as it progresses. Be warned that
      currently anything may be changed from one version to the next.

    This package describes an interface that classes can use to implement a
    driver to talk to a specific hardware chip or module. An instance
    implementing this interface would communicate with the actual hardware
    device via some instance of the related interface,

    The documentation in this file is aimed primarily at users of
    Device::Chip subclasses. For more information on authoring such a
    module, see instead Device::Chip::Authoring.


    To actually use a chip driver to talk to a specific piece of hardware
    that is connected to the computer, an adapter must be supplied. This
    will be an instance of some class that satisfies the
    Device::Chip::Adapter interface. The chip driver will use this adapter
    instance to access the underlying hardware port used to electrically
    connect to the chip and communicate with it. This is supplied by
    invoking the "mount" method. For example:

       my $chip = Device::Chip::MAX7219->new;
       my $adapter = Device::Chip::Adapter::FTDI->new;
       await $chip->mount( $adapter );



       $chip = Device::Chip->new;

    Returns a new instance of a chip driver object.


    The following methods documented in an await expression return Future

    This allows them to easily be used as a simple synchronous method by
    using the trailing "get" in Future call. Alternatively, if the
    underlying adapter allows a fully asynchronous mode of operation, they
    can be combined in the usual ways for futures to provide more
    asynchronous use of the device.


       $chip = await $chip->mount( $adapter, %params );

    Supplies the chip driver with the means to actually communicate with
    the connected device, via some electrical interface connected to the

    The parameters given in %params will vary depending on the specific
    chip in question, and should be documented there.


       $chip = await $chip->mount_from_paramstr( $adapter, $paramstr );

    A variant of "mount" that parses its options from the given string.
    This string should be a comma-separated list of parameters, where each
    is given as a name and value separated by equals sign. If there is no
    equals sign, the value is implied as true, as a convenience for
    parameters that are simple boolean flags.


    Paul Evans <>