core: Support SerialUSB#209
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- Refactored ZephyrSerial's send/receive logic and protected the RX/TX ring buffers with semaphores. - Modified `write()` to write the entire payload by calling `yield()` if the data exceeds buffer capacity. - Added support for `availableForWrite()`, `flush()`, and the `Print::write` overload to align with the Arduino Core implementation. - UART re-initialization logic move to `_reinit_if_needed()`. - Added a mechanism to shift the standard UART to `Serial1` (or higher) if `Serial` is occupied by `cdc_acm_serial` or `arduino_router_serial`. - Added macros (such as `ARDUINO_CONSOLE_SERIAL` and `ARDUINO_HARDWARE_SERIAL`) to reference `Serial` objects based on their specific use cases. Co-authored-by: Kurt Eckhardt <kurte@rockisland.com> Co-authored-by: Luca Burelli <l.burelli@arduino.cc> Co-authored-by: Martino Facchin <m.facchin@arduino.cc> Co-authored-by: Mattia Pennasilico <m.pennasilico@arduino.cc> Co-authored-by: Tamas Jozsi <tamas.jozsi@silabs.com> Co-authored-by: iabdalkader <i.abdalkader@gmail.com> Co-authored-by: kurte <kurte@rockisland.com> Co-authored-by: pennam <m.pennasilico@arduino.cc> Signed-off-by: TOKITA Hiroshi <tokita.hiroshi@gmail.com>
Import codes to support SerialUSB function. Co-authored-by: Daniele Cloralio <d.cloralio@arduino.cc> Co-authored-by: Luca Burelli <l.burelli@arduino.cc> Co-authored-by: Martino Facchin <m.facchin@arduino.cc> Co-authored-by: iabdalkader <i.abdalkader@gmail.com> Co-authored-by: kurte <kurte@rockisland.com> Co-authored-by: pennam <m.pennasilico@arduino.cc> Signed-off-by: TOKITA Hiroshi <tokita.hiroshi@gmail.com>
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Import codes to support SerialUSB function.