Cheat Sheet#

pw_kernel: Kernel experiments

rust_analyzer#

Generating rust-project.json#

For a given $CONFIG in:

  • k_host

  • k_qemu_mps2_an505

  • k_rp2350

bazelisk run @rules_rust//tools/rust_analyzer:gen_rust_project -- --config $CONFIG //pw_kernel/...

Errors and warnings in VSCode#

Add this to Pigweed’s .vscode/settings.json. Note that it only builds the kernel targets to limit the amount of time that it takes to run. Substitute $CONFIG for the config chosen above.

"rust-analyzer.check.overrideCommand": [
  "bazelisk",
  "build",
  "--config=$CONFIG",
  "--@rules_rust//:error_format=json",
  "//pw_kernel/..."
],

Build and Test#

Host#

Test#

bazelisk test --config k_host //pw_kernel/...

QEMU#

Supported QEMU platforms: * k_qemu_mps2_an505 - a cortex-m33 based system * k_qemu_virt_riscv32 - a riscv32 based system

Test#

bazelisk test --config k_qemu_mps2_an505 //pw_kernel/...

bazelisk test --config k_qemu_virt_riscv32 //pw_kernel/...

Run#

^A-x to exit qemu

bazelisk run --config k_qemu_mps2_an505 //pw_kernel:console

bazelisk run --config k_qemu_virt_riscv32 //pw_kernel:console

RP2350 Target Board#

Build#

bazelisk build --config k_rp2350 //pw_kernel/entry:kernel

Console —

bazelisk run --config k_rp2350 //pw_kernel:console -- -d <SERIAL_DEVICE>

Running the console will trigger a build of the kernel if required.

Flash#

probe-rs download --chip rp2350 bazel-bin/pw_kernel/entry/kernel && probe-rs reset

Note that any logging messages between boot and connecting a console to the device will be missed, so it’s best to start the console in one terminal first, before flashing the device. This will also ensure that the image that’s flashed to the device matches the image that’s being used to detokenize the logs.

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