| commit | dad36e342a8efd97953f662cd6136747b03fc3c3 | [log] [tgz] |
|---|---|---|
| author | Aaron Green <aarongreen@pigweed.infra.roller.google.com> | Wed Sep 18 17:35:05 2024 +0000 |
| committer | CQ Bot Account <pigweed-scoped@luci-project-accounts.iam.gserviceaccount.com> | Wed Sep 18 17:35:05 2024 +0000 |
| tree | 8e3431cf46270221da4355427342b56225775ba3 | |
| parent | 19a53c43d1e6bade80ba0c7f17e9f3532a3b43c7 [diff] |
roll: pigweed pw_bytes: Add PackedPtr Every object types has an alignment requirement, and for most types this is greater than one. As a result, pointers to these types have one or more least significant bits that are always zero. For certain types, such as intrusive container types, it is desirable to reuse these bits and avoid creating additional fields. This class facilitates those use cases by providing a wrapper type that can be treated like a pointer in many cases, but that can also be used to set and get a value from the unused bits. This storage is not free: this class must perform bit operations on every dereference, adding to its performance cost and code size. This class should only be used when the benefits of saving memory overhead outweigh these costs. Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/235104 Original-Revision: cda5ba673366d189e0ea326a0fa808df181730a7 Rolled-Repo: https://pigweed.googlesource.com/pigweed/pigweed Rolled-Commits: faac61757b5428..cda5ba673366d1 Roller-URL: https://ci.chromium.org/b/8736437843974743713 GitWatcher: ignore CQ-Do-Not-Cancel-Tryjobs: true Change-Id: Ib8de5dd948a3cb3a6eb0f46a56796729fe2a49b9 Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/quickstart/bazel/+/236774 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>
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.
git clone https://pigweed.googlesource.com/pigweed/quickstart/bazel pw_bazel_quickstart cd pw_bazel_quickstart
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.
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
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
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)
bazelisk test //... will run the unit tests defined in this project, such as the ones in modules/blinky/blinky_test.cc.
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.
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.