Working with Python API

The recommended way of defining your registers and fields is to use a .toml data file. However depending on your needs it might make sense to define them directly in Python instead. This page will showcase a simple example of how to get started with this.

The Python code below sets up a RegisterList with two Registers and some fields. After this it performs a VHDL code generation.

Register TOML format example.
 1import sys
 2from pathlib import Path
 3
 4from hdl_registers.generator.vhdl.register_package import VhdlRegisterPackageGenerator
 5from hdl_registers.register_list import RegisterList
 6from hdl_registers.register_modes import REGISTER_MODES
 7
 8
 9def main(output_folder: Path) -> None:
10    """
11    Set up some dummy registers and fields using the Python API.
12    """
13    register_list = RegisterList(name="caesar")
14
15    register = register_list.append_register(
16        name="conf", mode=REGISTER_MODES["r_w"], description="Configuration register."
17    )
18
19    register.append_bit_vector(
20        name="tuser",
21        description="Value to set for **TUSER** in the data stream.",
22        width=4,
23        default_value="0101",
24    )
25
26    register.append_integer(
27        name="increment",
28        description="Offset that will be added to data.",
29        min_value=-4,
30        max_value=3,
31        default_value=0,
32    )
33
34    register = register_list.append_register(
35        name="status", mode=REGISTER_MODES["r"], description="General status register."
36    )
37
38    VhdlRegisterPackageGenerator(register_list=register_list, output_folder=output_folder).create()
39
40
41if __name__ == "__main__":
42    main(output_folder=Path(sys.argv[1]))

The articles in the the menubar on the left all showcase how to utilize the different features using the Python API as well as a TOML file. Please read these articles for further information.