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Integrated Circuit Hierarchy

Project description

Integrated Circuit Hierarchy

做什么用?

懒得写,AI 帮我总结了一下。

ichier 是一个用于创建和处理电路设计的 Python 库。它允许用户定义设计、模块、端口和实例,并生成对应的代码。这个库可以用于以下几个方面:

  1. 设计创建:通过 DesignModule 等类,可以构建电路设计,并添加多个模块来实现抽象的对应关系。

  2. 终端和网络定义:可以轻松定义模块之间的连接,通过设置输入输出端口 Terminal 和内部网络 net 来描述电路的交互。

  3. 实例化模块:允许将模块实例化多次,以便在设计中复用特定的功能,比如在一个电路中多次使用同一个逻辑门。

  4. 代码解析:支持解析 Spice 和 Verilog 格式的电路文件,生成 Design 对象,方便分析电路结构和参数,提取设计信息。

  5. 命令行交互:支持在 Python 中启动交互式 shell,方便对电路的信息进行查询。

安装

pip install ichier -U

描述一个电路

buffer.py

from ichier import *

design = Design(
    modules=[
        Module(
            name="inv",
            terminals=[
                Terminal(name="A", direction="input"),
                Terminal(name="Z", direction="output"),
            ],
        ),
        Module(
            name="buf",
            terminals=[
                Terminal(
                    name="A",
                    direction="input",
                ),
                Terminal(
                    name="Z",
                    direction="output",
                ),
            ],
            nets=[
                Net(name="A"),
                Net(name="Z"),
                Net(name="inter"),
            ],
            instances=[
                Instance(
                    name="i1",
                    reference="inv",
                    connection={
                        "A": "A",
                        "Z": "inter",
                    },
                    parameters={"size": "x2"},
                ),
                Instance(
                    name="i2",
                    reference="inv",
                    connection={
                        "A": "inter",
                        "Z": "Z",
                    },
                    parameters={"size": "x4"},
                ),
            ],
        ),
    ],
)
  • 查询信息
design.modules.figs
# (Module('inv'), Module('buf'))

buf = design.modules["buf"]

buf.terminals.figs
# (Terminal('A', 'input'), Terminal('Z', 'output'))

buf.instances.figs
# (Instance('i1'), Instance('i2'))

buf.nets.figs
# (Net('A'), Net('Z'), Net('inter'))
  • 导出为 Spice
print(design.dumpToSpice())
# .SUBCKT inv A Z
# *.PININFO A:I Z:O
# .ENDS


# .SUBCKT buf A Z
# *.PININFO A:I Z:O
# i1 / inv $PINS A=A Z=inter
# i2 / inv $PINS A=inter Z=Z
# .ENDS

从网表读入设计

* top.cdl

.SUBCKT inv A Z
*.PININFO A:I Z:O
.ENDS

.SUBCKT buf A Z
*.PININFO A:I Z:O
i1 / inv $PINS A=A Z=inter
i2 / inv $PINS A=inter Z=Z
.ENDS
  • 解析 Spice 文件
from ichier.parser import fromSpice
design = fromSpice("top.cdl")
  • 解析 Verilog 文件
// top.v

module inv ( input A, output Z );
endmodule

module buf ( input A, output Z );
wire inter;
inv i1 (.A(A), .Z(inter));
inv i2 (.A(inter), .Z(Z));
endmodule
from ichier.parser import fromVerilog
design = fromVerilog("top.v")
  • 也可以直接使用 CLI 工具
python -m ichier parse verilog top.v
python -m ichier parse spice top.cdl

预先安装 ipythonrich 库,会有更好的交互体验。

LICENSE

GNU Affero General Public License v3

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