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[spinel] refactor connection handling for USB transport (#6963)

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This commit simplifies USB connection handling after resetting (hard reset)
RCP device with USB transport.
It drops udev dependency making the new approach generic for USB CDC ACM
across all platform.
It is working also on dockers.
The feature is enabled by new radio Url parameter: 'uart-reset'.

Radio url example:
spinel+hdlc+uart:///dev/serial/by-id/SYMLINK_TO_RCP_DEVICE?uart-reset

It is meant only for connection with RCP devices working with USB
transport and performing hard reset on host reset command.
This commit is contained in:
Łukasz Maciejończyk
2021-08-30 12:41:16 -07:00
committed by GitHub
parent 57ade714a6
commit 812fc1eaea
10 changed files with 30 additions and 145 deletions
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examples/README.md
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@@ -54,7 +54,6 @@ This page lists the available common switches with description. Unless stated ot
| OTNS | OT_OTNS | Enables support for [OpenThread Network Simulator](https://github.com/openthread/ot-ns). Enable this switch if you are building OpenThread for OpenThread Network Simulator. |
| PLATFORM_UDP | OT_PLATFORM_UDP | Enables platform UDP support. |
| REFERENCE_DEVICE | OT_REFERENCE_DEVICE | Enables support for Thread Test Harness reference device. Enable this switch on the reference device during certification. |
| RESET_CONNECTION | OT_SPINEL_RESET_CONNECTION | Enables resetting connection with RCP device. Enable this switch if RCP uses USB transport and performs hard reset. Use symlink instead of file name pointing the RCP device i.e. /dev/serial/by-id/usb-device-name instead of /dev/ttyUSB0 in a connection configuration. |
| SERVICE | OT_SERVICE | Enables support for injecting Service entries into the Thread Network Data. |
| SETTINGS_RAM | OT_SETTINGS_RAM | Enables volatile-only storage of settings. |
| SLAAC | OT_SLAAC | Enables support for adding auto-configured SLAAC addresses by OpenThread. This feature is enabled by default. |