prga.prog.scanchain.lib module¶

class prga.prog.scanchain.lib.Scanchain¶

Bases: prga.prog.common.AbstractProgCircuitryEntry

Entry point for scanchain programming circuitry.

classmethod _get_or_create_scanchain_data_cell(context, data_width)¶

Get the programming data module for data_width bits.

Parameters:	context (`Context`) – data_width (`int`) –
Returns:
Return type:	`Module`

classmethod _get_or_create_scanchain_prog_nets(module, chain_width, excludes=None)¶

classmethod _insert_scanchain(context, design_view=None, *, iter_instances=None, insert_delimiter=None)¶

Insert the scanchain.

Keyword Arguments:
Parameters:	context (`Context`) – design_view (`Module`) – The module (design view) in which scanchain is inserted. If not specified, the top-level array in `context` is selected
	iter_instances (`Function` [`Module` ] -> `Iterable` [`Instance` ]) – Custom ordering of the instances in a module insert_delimiter (`Function` [`Module` ] -> `bool`) – Determine if `we` buffers are inserted at the beginning and end of the scanchain inside `design_view`. By default, buffers are inserted in all logic/IO blocks and routing boxes.

This method calls itself recursively to process all the instances (sub-modules).

classmethod insert_prog_circuitry(context, *, iter_instances=None, insert_delimiter=None)¶

Insert programming circuitry into the FPGA. This method will be called by the ProgCircuitryInsertion pass.

Parameters:	context (`Context`) –

classmethod materialize(ctx, inplace=False, *, chain_width=1)¶

Materialize the abstract context to this configuration circuitry type.

Keyword Arguments:
Parameters:	ctx (`Context`) – An abstract context, or a context previously materialized to another configuration circuitry type. inplace (`bool`) – If set, the context is modified in-place. Otherwise (by default), `ctx` is deep-copied before processed
	**kwargs – Additional keyword parameters specific to the programming circuitry type.
Returns:
Return type:	`Context`