luna_soc.gateware.core.usb2.device module

Contains the organizing gateware used to add USB Device functionality to your own designs; including the core USBDevice class.

class luna_soc.gateware.core.usb2.device.Peripheral(*args, src_loc_at=0, **kwargs)[source]

Bases: Component

SoC controller for a USBDevice.

Breaks our USBDevice control and status signals out into registers so a CPU / Wishbone master can control our USB device.

The attributes below are intended to connect to a USBDevice. Typically, they’d be created by using the .controller() method on a USBDevice object, which will automatically connect all relevant signals.

Attributes

connect: Signal(), output: High when the USBDevice should be allowed to connect to a host.

class Control(*args, src_loc_at=0, **kwargs)[source]

Bases: Register

A CSR register.

Parameters

fieldsdict or list or Field: Collection of register fields. If None (default), a dict is populated from Python variable annotations. fields is used to create a FieldActionMap, FieldActionArray, or FieldAction, depending on its type (dict, list, or Field).

Interface attributes

elementElement: Interface between this register and a CSR bus primitive.

Attributes

fieldFieldActionMap or FieldActionArray or FieldAction: Collection of field instances.
fFieldActionMap or FieldActionArray or FieldAction: Shorthand for Register.field.

Raises

TypeError: If fields is neither None, a dict, a list, or a Field.
ValueError: If fields is not None and at least one variable annotation is a Field.
ValueError: If element.access is not readable and at least one field is readable.
ValueError: If element.access is not writable and at least one field is writable.

connect: <amaranth_soc.csr.reg.Field object at 0x7f6321325550>

full_speed_only: <amaranth_soc.csr.reg.Field object at 0x7f6320af1ee0>

low_speed_only: <amaranth_soc.csr.reg.Field object at 0x7f6320af0a70>

class Status(*args, src_loc_at=0, **kwargs)[source]

Bases: Register

A CSR register.

Parameters

fieldsdict or list or Field: Collection of register fields. If None (default), a dict is populated from Python variable annotations. fields is used to create a FieldActionMap, FieldActionArray, or FieldAction, depending on its type (dict, list, or Field).

Interface attributes

elementElement: Interface between this register and a CSR bus primitive.

Attributes

fieldFieldActionMap or FieldActionArray or FieldAction: Collection of field instances.
fFieldActionMap or FieldActionArray or FieldAction: Shorthand for Register.field.

Raises

TypeError: If fields is neither None, a dict, a list, or a Field.
ValueError: If fields is not None and at least one variable annotation is a Field.
ValueError: If element.access is not readable and at least one field is readable.
ValueError: If element.access is not writable and at least one field is writable.

speed: <amaranth_soc.csr.reg.Field object at 0x7f6320b0e870>

attach(device: USBDevice)[source]

Returns a list of statements necessary to connect this to a USB controller.

The returned values makes all of the connections necessary to provide control and fetch status from the relevant USB device. These can be made either combinationally or synchronously, but combinational is recommended; as these signals are typically fed from a register anyway.

Parameters

device: USBDevice: The USBDevice object to be controlled.

elaborate(platform)[source]