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pigweed / pigweed / quickstart / bazel / 2d24cb7a76354f2d74132b2cc48d05f7f3902c38
commit2d24cb7a76354f2d74132b2cc48d05f7f3902c38[log] [tgz]
authorAaron Green <aarongreen@pigweed.infra.roller.google.com>Fri Sep 19 19:46:28 2025 -0700
committerCQ Bot Account <pigweed-scoped@luci-project-accounts.iam.gserviceaccount.com>Fri Sep 19 19:46:28 2025 -0700
treebb27e562bae87c8dda87b645236dde84ce8d114b
parentbcebc701ad4f54867d94f8adc7e7e9b6e981263f [diff]
roll: pigweed pw_varint: Refactor and make constexpr

This CL makes pw_varint's C API use its C++ API, rather than the
reverse, in order to allow the latter to be evaluated at compile time
when possible. Code that depends on pw_varint can now be made constexpr
as well.

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/323973
Original-Revision: b0f9c5fe352fb27592bcd77e68e523e754e4a336

Rolled-Repo: https://pigweed.googlesource.com/pigweed/pigweed
Rolled-Commits: 75ab64cf567805..b0f9c5fe352fb2
Roll-Count: 1
Roller-URL: https://cr-buildbucket.appspot.com/build/8703244973079882769
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I1018b094b22b2393b038c464c48100b02c8bafb8
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/quickstart/bazel/+/324173
Commit-Queue: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Lint: Lint 🤖 <android-build-ayeaye@system.gserviceaccount.com>
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
1 file changed
tree: bb27e562bae87c8dda87b645236dde84ce8d114b
  1. .github/
  2. .vscode/
  3. apps/
  4. modules/
  5. system/
  6. targets/
  7. tools/
  8. .bazelignore
  9. .bazelrc
  10. .bazelversion
  11. .buildifier.json
  12. .clang-format
  13. .clang-tidy
  14. .clangd.shared
  15. .gitignore
  16. .pw_console.yaml
  17. .pylintrc
  18. AUTHORS
  19. BUILD.bazel
  20. CONTRIBUTING.md
  21. LICENSE
  22. MODULE.bazel
  23. MODULE.bazel.lock
  24. mypy.ini
  25. OWNERS
  26. pw
  27. README.md
  28. workflows.json
README.md

Pigweed: minimal Bazel example

This repository contains a minimal example of a Bazel-based Pigweed project. It is a LED-blinking service (featuring RPC control!) for the Raspberry Pi Pico. It can also be run on any computer using the included simulator.

Getting the code

git clone https://pigweed.googlesource.com/pigweed/quickstart/bazel pw_bazel_quickstart
cd pw_bazel_quickstart

Dependencies

The only dependency that must be installed is Bazelisk.

Bazelisk is a launcher for the Bazel build system that allows for easy management of multiple Bazel versions.

Instructions for installing Bazelisk can be found here.

Running on the simulator

To run the simulator, type: bazelisk run //apps/blinky:simulator_blinky Then, in a new console, connect to the simulator using: bazelisk run //apps/blinky:simulator_console

Running on hardware

To start, connect a Raspberry Pi Pico, Pico 2, or debug probe via USB.

To run on the Raspberry Pi Pico, type: bazelisk run //apps/blinky:flash_rp2040 Then, in a new console, connect to the device using: bazelisk run //apps/blinky:rp2040_console

Controlling the LED

Once connected with a console, RPCs can be sent to control the LED. Try running:

device.set_led(True)
device.set_led(False)
device.toggle_led()
device.blink(blink_count=3)

Running unit tests on the host device

bazelisk test //... will run the unit tests defined in this project, such as the ones in modules/blinky/blinky_test.cc.

Running unit tests on hardware

bazelisk run @pigweed//targets/rp2040/py:unit_test_server in one console followed by bazelisk test //... --config=rp2040 will also allow running the unit tests on-device.

Next steps

Try poking around the codebase for inspiration about how Pigweed projects can be organized. Most of the relevant code in this quickstart (including RPC definitions) is inside modules/blinky, with some client-side Python code in tools/console.py.