update a955b0f

.buildinfo

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+# Sphinx build info version 1
+# This file hashes the configuration used when building these files. When it is not found, a full rebuild will be done.
+config: 4da8535d0974b10ef712b289b4447025
+tags: 645f666f9bcd5a90fca523b33c5a78b7

_sources/cli.md.txt

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+# Command-line Interface
+
+## Building design
+
+To run Topwrap, use:
+
+```
+python -m topwrap build --design project.yml
+```
+
+Where `project.yml` should be your file with description of the top module.
+
+You can specify a directory to be scanned for additional sources:
+
+```
+python -m topwrap build --sources src --design project.yml
+```
+
+To implement the design for a specific FPGA chip, provide the part name:
+
+```
+python -m topwrap build --sources src --design project.yml --part 'xc7z020clg400-3'
+```
+
+(connect-topwrap-to-pm)=
+
+## Connect Topwrap to Pipeline Manager
+
+If you want to use Pipeline Manager as a UI for creating block design, you need to:
+
+1. Build and run Pipeline Manager server application.
+
+```
+python -m topwrap kpm_build_server
+python -m topwrap kpm_run_server
+```
+
+2. Run Topwrap's client application, that will connect to a running Pipeline Manager server app.
+
+```
+python -m topwrap kpm_client [-h ip_addr] [-p port] [-d FILE] FILES
+```
+
+Topwrap will then try to connect to the server running on `ip_addr:port` and send a specification generated from `FILES`, which should be IP core description yamls.
+
+If `-h` or `-p` options are not specified, ip address `127.0.0.1` and port `9000` will be chosen by default.
+
+If `-d` option is specified, kpm will start with specified design file loaded.
+
+(generating-ip-yamls)=
+
+## Generating IP core description YAMLs
+
+You can also use Topwrap to generate ip core description yamls from HDL sources,
+that can be later used in your `project.yml`:
+
+```
+python -m topwrap parse HDL_FILES
+```
+
+In HDL source files, ports that belong to the same interface (e.g. wishbone or AXI),
+have often a common prefix, which corresponds to the interface name. If such naming
+convention is followed in the HDL sources, Topwrap can also divide ports into user-specified
+interfaces, or automatically deduce interfaces names when generating yaml file:
+
+```
+python -m topwrap parse --iface wishbone --iface s_axi HDL_FILES
+
+python -m topwrap parse --iface-deduce HDL_FILES
+```
+
+To get help, use:
+
+```
+python -m topwrap [build|kpm_client|parse] --help
+```

_sources/description_files.md.txt

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+(description-files)=
+
+# Description files
+
+(design-description)=
+
+## Design Description
+
+To create a complete, fully synthesizable design, a proper design file is needed.
+It's used to specify interconnects, IP cores, set their parameters' values, describe hierarchies for the project,
+connect the IPs and hierarchies, and pick external ports (those which will be connected to physical I/O).
+
+You can see example design files in `examples` directory. The structure is as below:
+
+```yaml
+ips:
+  # specify relations between IPs instance names in the
+  # design yaml and IP cores description yamls
+  {ip_instance_name}:
+    file: {path_to_yaml_file_of_the_ip}
+  ...
+
+design:
+  name: {design_name} # optional name of the toplevel
+  hierarchies:
+      # see "Hierarchies" page for a detailed description of the format
+      ...
+  parameters: # specify IPs parameter values to be overridden
+    {ip_instance_name}:
+      {param_name} : {param_value}
+      ...
+
+  ports:
+    # specify incoming ports connections of an IP named `ip1_name`
+    {ip1_name}:
+      {port1_name} : [{ip2_name}, {port2_name}]
+      ...
+    # specify incoming ports connections of a hierarchy named `hier_name`
+    {hier_name}:
+      {port1_name} : [{ip_name}, {port2_name}]
+      ...
+    # specify external ports connections
+    {ip_instance_name}:
+      {port_name} : ext_port_name
+    ...
+
+  interfaces:
+    # specify incoming interfaces connections of `ip1_name` IP
+    {ip1_name}:
+      {iface1_name} : [{ip2_name}, {iface2_name}]
+      ...
+    # specify incoming interfaces connections of `hier_name` hierarchy
+    {hier_name}:
+      {iface1_name} : [{ip_name}, {iface2_name}]
+      ...
+    # specify external interfaces connections
+    {ip_instance_name}:
+      {iface_name} : ext_iface_name
+    ...
+
+  interconnects:
+    # see "Interconnect generation" page for a detailed description of the format
+    ...
+
+external: # specify names of external ports and interfaces of the top module
+  ports:
+    out:
+      - {ext_port_name}
+    inout:
+      - [{ip_name/hierarchy_name, port_name}]
+  interfaces:
+    in:
+      - {ext_iface_name}
+    # note that `inout:` is invalid in the interfaces section
+```
+
+`inout` ports are handled differently than `in` and `out` ports. When any IP has an inout port or when a hierarchy has an inout port specified in its `external.ports.inout` section, it must be included in `external.ports.inout` section of the parent design by specifying the name of the IP/hierarchy and port name that contains it. Name of the external port will be identical to the one in the IP core. In case of duplicate names a suffix `$n` is added (where `n` is a natural number) to the name of the second and subsequent duplicate names. `inout` ports cannot be connected to each other.
+
+The design description yaml format allows creating hierarchical designs. In order to create a hierarchy, it suffices to add its name as a key in the `design` section and describe the hierarchy design "recursively" by using the same keys and values (`ports`, `parameters` etc.) as in the top-level design (see above). Hierarchies can be nested recursively, which means that you can create a hierarchy inside another one.
+
+Note that IPs and hierarchies names cannot be duplicated on the same hierarchy level. For example, the `design` section cannot contain two identical keys, but it's correct to have `ip_name` key in this section and `ip_name` in the `design` section of some hierarchy.
+
+(ip-description)=
+
+## IP description files
+
+Every IP wrapped by Topwrap needs a description file in YAML format.
+
+The ports of an IP should be placed in global `signals` node, followed by the direction of `in`, `out` or `inout`.
+Here's an example description of ports of Clock Crossing IP:
+
+```yaml
+# file: clock_crossing.yaml
+signals:
+    in:
+        - clkA
+        - A
+        - clkB
+    out:
+        - B
+```
+
+The previous example is enough to make use of any IP. However, in order to benefit from connecting whole interfaces at once, ports must belong to a named interface like in this example:
+
+```yaml
+#file: axis_width_converter.yaml
+interfaces:
+    s_axis:
+        type: AXIStream
+        mode: slave
+        signals:
+            in:
+                TDATA: [s_axis_tdata, 63, 0]
+                TKEEP: [s_axis_tkeep, 7, 0]
+                TVALID: s_axis_tvalid
+                TLAST: s_axis_tlast
+                TID: [s_axis_tid, 7, 0]
+                TDEST: [s_axis_tdest, 7, 0]
+                TUSER: s_axis_tuser
+            out:
+                TREADY: s_axis_tready
+
+    m_axis:
+        type: AXIStream
+        mode: master
+        signals:
+            in:
+                TREADY: m_axis_tready
+            out:
+                TDATA: [m_axis_tdata, 31, 0]
+                TKEEP: [m_axis_tkeep, 3, 0]
+                TVALID: m_axis_tvalid
+                TLAST: m_axis_tlast
+                TID: [m_axis_tid, 7, 0]
+                TDEST: [m_axis_tdest, 7, 0]
+                TUSER: m_axis_tuser
+signals: # These ports don't belong to any interface
+    in:
+        - clk
+        - rst
+```
+
+Names `s_axis` and `m_axis` will be used to group the selected ports.
+Each signal in an interface has a name which must match with the signal it's supposed to be connected to, for example `TDATA: port_name` will be connected to `TDATA: other_port_name`.
+
+Note that you don't have to write IP core description yamls by hand. You can use Topwrap's `parse` command (see {ref}`Generating IP core description YAMLs <generating-ip-yamls>`) in order to generate yamls from HDL source files and then adjust the yaml to your needs.
+
+### Port widths
+
+The width of every port defaults to `1`.
+You can specify the width using this notation:
+
+```yaml
+interfaces:
+    s_axis:
+        type: AXIStream
+        mode: slave
+        signals:
+            in:
+                TDATA: [s_axis_tdata, 63, 0] # 64 bits
+                ...
+                TVALID: s_axis_tvalid # defaults to 1 bit
+
+signals:
+    in:
+        - [gpio_io_i, 31, 0] # 32 bits
+```
+
+### Parameterization
+
+Port widths don't have to be hardcoded - you can use parameters to describe an IP core in a generic way.
+Values specified in IP core yamls can be overridden in a design description file (see {ref}`Design Description <design-description>`).
+
+```yaml
+parameters:
+    DATA_WIDTH: 8
+    KEEP_WIDTH: (DATA_WIDTH+7)/8
+    ID_WIDTH: 8
+    DEST_WIDTH: 8
+    USER_WIDTH: 1
+
+interfaces:
+    s_axis:
+        type: AXI4Stream
+        mode: slave
+        signals:
+            in:
+                TDATA: [s_axis_tdata, DATA_WIDTH-1, 0]
+                TKEEP: [s_axis_tkeep, KEEP_WIDTH-1, 0]
+                ...
+                TID: [s_axis_tid, ID_WIDTH-1, 0]
+                TDEST: [s_axis_tdest, DEST_WIDTH-1, 0]
+                TUSER: [s_axis_tuser, USER_WIDTH-1, 0]
+```
+
+Parameters values can be integers or math expressions, which are evaluated using `numexpr.evaluate()`.
+
+(port-slicing)=
+
+### Port slicing
+
+You can also slice a port, to use some bits of the port as a signal that belongs to an interface.
+The example below means:
+
+`Port m_axi_bid of the IP core is 36 bits wide. Use bits 23..12 as the BID signal of AXI master named m_axi_1`
+
+```yaml
+m_axi_1:
+    type: AXI
+    mode: master
+    signals:
+        in:
+            BID: [m_axi_bid, 35, 0, 23, 12]
+```
+
+(interface-description-files)=
+
+## Interface Description files
+
+Topwrap can use predefined interfaces described in YAML files that come packaged with the tool.
+Currently supported interfaces are AXI4, AXI3, AXI Stream, AXI Lite and Wishbone.
+
+You can see an example file below:
+
+```yaml
+name: AXI4Stream
+port_prefix: AXIS
+signals:
+    # convention assumes the AXI Stream transmitter (master) perspective
+    required:
+        out:
+            TVALID: tvalid
+            TDATA: tdata
+            TLAST: tlast
+        in:
+            TREADY: tready
+    optional:
+        out:
+            TID: tid
+            TDEST: tdest
+            TKEEP: tkeep
+            TSTRB: tstrb
+            TUSER: tuser
+            TWAKEUP: twakeup
+```
+
+The name of an interface has to be unique.
+We also specify a prefix which will be used as a shortened identifier.
+Signals are either required or optional.
+Their direction is described from the the perspective of master (i.e. directionality of signals in the slave is flipped) - note that clock and reset are not included as these are usually inputs in both master and slave so they're not supported in interface specification.
+These distinctions are used when an option to check if all mandatory signals are present is enabled and when parsing an IP core with `topwrap parse` (not all required signals must necessarily be present but it's taken into account).
+Every signal is a key-value pair, where the key is a generic signal name (usually from interface specification) and value is a regex that is used to pair the generic name with a concrete signal name in the RTL source when using `topwrap parse`.
+This pairing is performed on signal names that are transformed to lowercase and have a common prefix of an interface they belong to removed.
+If a regexp occurs in such transformed signal name anywhere, that name is paired with the generic name.
+Since this occurs on names that have all characters in lowercase, regex must be written in lowercase as well.

_sources/developers_guide/config.md.txt

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+# Config
+
+A {class}`~topwrap.config.Config` object stores configuration values.
+A global `topwrap.config.config` object is used throughout the codebase to access topwrap's configuration.
+This is created by {class}`~topwrap.config.ConfigManager` that reads config files defined in {attr}`topwrap.config.ConfigManager.DEFAULT_SEARCH_PATHS`, with files most local to the project taking precedence.
+
+```{eval-rst}
+.. autoclass:: topwrap.config.Config
+   :members:
+
+   .. automethod:: __init__
+```
+
+```{eval-rst}
+.. autoclass:: topwrap.config.ConfigManager
+   :members:
+
+   .. automethod:: __init__
+```

_sources/developers_guide/elaboratable_wrapper.md.txt

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+# ElaboratableWrapper class
+
+{class}`~topwrap.elaboratable_wrapper.ElaboratableWrapper` encapsulates an Amaranth's Elaboratable and exposes an interface compatible with other wrappers which allows making connections with them.
+Supplied elaboratable must contain a `signature` property and a conforming interface as specified by [Amaranth docs](https://amaranth-lang.org/rfcs/0002-interfaces.html).
+Ports' directionality, their names and widths are inferred from it.
+
+```{eval-rst}
+.. autoclass:: topwrap.elaboratable_wrapper.ElaboratableWrapper
+   :members:
+
+   .. automethod:: __init__
+```

_sources/developers_guide/examples.md.txt

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+# Examples
+
+:::{note}
+Basic usage of examples is explained in the {ref}`getting-started` section.
+:::
+
+Examples provided with this project should cover from very simple designs to complex fully synthesizable cores.
+They should be sorted by increasing complexity and number of used features, e.g:
+- 101: minimal base design
+- 102: introduce user to parameters
+- 103: introduce user to slicing
+- 104: introduce user to interfaces
+- 105: etc.
+
+Developers are encouraged to create/add new examples in the same spirit.
+Simple examples are used to teach how to use this tool and demonstrate its features.
+Real-world use cases are also welcome to prove that the implementation is mature enough to handle practical designs.