[roll third_party/pigweed] pw_thread/backends: Expand docs

Expands the docs for the pw_thread backends. Most notably the
ThreadX pw_thread docs are grossly expanded.

Also makes some small parallel changes to the ThreadX context and
option headers.

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/70532

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 2fed999cfb5afef..d5a4220ec991388
Roller-URL: https://ci.chromium.org/b/8829726595549524241
Cq-Cl-Tag: roller-builder:pigweed-experimental-roller
Cq-Cl-Tag: roller-bid:8829726595549524241
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I40e3ac1c59719408faa6e6ce45792cd65a04fcf7
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/70534
Bot-Commit: Pigweed Integration Roller <pigweed-integration-roller@pigweed.google.com.iam.gserviceaccount.com>
Commit-Queue: Pigweed Integration Roller <pigweed-integration-roller@pigweed.google.com.iam.gserviceaccount.com>
1 file changed
tree: 1a18bd37239d660fb4c85ea9c85802849c35d0e8
  1. .gitattributes
  2. .gitignore
  3. .gitmodules
  4. .gn
  5. BUILD.gn
  6. BUILDCONFIG.gn
  7. OWNERS
  8. PW_PLUGINS
  9. README.md
  10. activate.bat
  11. applications/
  12. banner.txt
  13. bootstrap.bat
  14. bootstrap.sh
  15. build_overrides/
  16. env_setup.json
  17. navbar.md
  18. pw_board_led/
  19. pw_board_led_arduino/
  20. pw_board_led_host/
  21. pw_board_led_stm32cube/
  22. pw_board_led_stm32f429i_disc1/
  23. pw_spin_delay/
  24. pw_spin_delay_arduino/
  25. pw_spin_delay_host/
  26. pw_spin_delay_stm32cube/
  27. pw_spin_delay_stm32f429i_disc1/
  28. pw_sys_io_stm32cube/
  29. targets/
  30. third_party/
  31. tools/
README.md

Pigweed Experimental

This repository contains experimental pigweed modules.

Repository setup

Clone this repo with --recursive to get all required submodules.

git clone --recursive https://pigweed.googlesource.com/pigweed/experimental

This will pull the Pigweed source repository into third_party/pigweed. If you already cloned but forgot to --recursive run git submodule update --init to pull all submodules.