pac-xtask

A very simple xtask crate for pac crates, with a few useful commands.

This crate may not fit your needs, please modify it to your needs.

Add to your pac crate

I suggest reading matklad/cargo-xtask first to understand what xtask is and how it works.

Prerequisites

Make the xtask crate a workspace member

First, you need to make the xtask crate a workspace member.

See below for adding the xtask crate to your workspace.

Single pac crate

If you only have a single pac crate, you can just add the xtask crate to the workspace members in the root Cargo.toml:

# Your pac's Cargo.toml

[package]
name = "<your soc>-pac"
...

[workspace]
members = ["xtask"]

Multiple pac crates

If you have multiple pac crates in one workspace already, you can simply add the xtask crate to the workspace members in the root Cargo.toml:

[workspace]
members = ["soc1-pac", "soc2-pac", "xtask"]

Add workspace configuration

You need to add the following configuration to the .cargo/config.toml file in the root of your workspace:

[alias]
xtask = "run --package xtask --release --"

[env]
CARGO_WORKSPACE_DIR = { value = "", relative = true }

The alias part does the trick of making cargo xtask work, and the env part is needed to pass the workspace directory to the xtask crate.

Add xtask configuration

xtask needs to get metadata of pac crates in the workspace, so you need to add the following configuration to the .xtask.toml in the root of your workspace:

[[pacs]]
chip_name = ["soc1", "SOC1"]    # A list of an soc's names
crate_name = "soc1-pac"         # The name (dir) of the pac crate
svd_name = "soc1"               # The name of the svd file
target = "riscv"                # The target of the pac crate
patch = false                   # Whether to patch the svd (Not impl yet)

[[pacs]]
...                             # other pac crates

This configuration is currently designed for duskmoon314/aw-pac. Thus, the crate_name is actually the directory name of the pac crate and xtask assume that the svd file is at svd/<svd_name>.svd. If you have a different structure, you need to modify the xtask crate.

Need to refactor this part.

Add xtask

You can just download the source code, using git subtree or anything you like. I have tested the git subtree and it seems working well.

# First, you can add this repo as a remote
# HTTPS way
git remote add -f xtask https://github.com/duskmoon314/pac-xtask.git
# SSH way
git remote add -f xtask git@github.com:duskmoon314/pac-xtask.git

# Then, you can add the xtask crate to your workspace
# Strongly suggest to use the `--squash` option and modify the message
git subtree add --prefix xtask xtask main --squash -m "build: add pac-xtask as subtree"

# You can check the history after adding the xtask crate in the above way
git log --oneline --graph

*   659efd5 (HEAD -> main) build: add pac-xtask as subtree
|\
| * e324fb7 Squashed 'xtask/' content from commit af40bdd
#### Previous commits

Usage

You can use cargo xtask to run the xtask crate. A Brief usage is shown below:

> cargo xtask --help
    Finished release [optimized] target(s) in 0.13s
     Running `target/release/xtask --help`
Usage: xtask [CHIPS]... <COMMAND>

Commands:
  codegen  Generate code from svd files
  svd-fmt  Format svd files
  help     Print this message or the help of the given subcommand(s)

Arguments:
  [CHIPS]...  Names of chips to do xtask on

Options:
  -h, --help  Print help information

Codegen

This command will use svd2rust to generate code and form to format the code.

cargo xtask codegen <a name in soc's chip_name>

# Example
cargo xtask codegen soc1

SVD format

This command will use svdtools to format the svd file.

cargo xtask svd-fmt <a name in soc's chip_name>

# Example
cargo xtask svd-fmt soc1

To use this command, currently you need to have an .svdfmt.yaml file at <workspace root>/svd/.svdfmt.yaml. You can modify the path in the xtask crate if you want.

The content of the .svdfmt.yaml file is like this:

# An experimental config file for svdtools fmt feature.
peripheral_name: Constant
peripheral_base_address: UpperHex16
address_block_offset: UpperHex
address_block_size: UpperHex
interrupt_name: Constant
cluster_name: Snake
cluster_address_offset: UpperHex
register_name: Snake
register_address_offset: UpperHex
register_size: Dec
register_reset_value: UpperHex16
register_reset_mask: UpperHex16
field_name: Snake
field_bit_range: BitRange
enumerated_values_name: Pascal
enumerated_value_name: Constant
enumerated_value_value: UpperHex
dim_dim: Dec
dim_increment: UpperHex

To see all the options, you can view the svd-encoder's source code

License

This project is licensed under

• MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)