As it is up to a driver implementation if a partial filled buffer is
released, this behavior can be configured during runtime to allow testing
for this edge case.
Signed-off-by: Ruben Völl <ruben.voell@grandcentrix.net>
Employ a code spell checking tool to scan and correct spelling errors
in all files within the drivers/serial directory.
Signed-off-by: Pisit Sawangvonganan <pisit@ndrsolution.com>
Define local thread to emulate different thread priorities.
A UART driver may call back from within a thread with higher
or lower priority than the thread calling the UART API. This
can hide potential concurrency issues, especially if the
thread priorities are the same, or even using the same thread
in case the system work queue.
Signed-off-by: Bjarki Arge Andreasen <bjarkix123@gmail.com>
Previously, the uart_emul device did not support interrupt-driven
receive, which is an unwritten requirement for hooking up a uart to
the Zephyr console driver.
The console is a fairly high-traffic subsystem, and we should be able
to perform more extensive testing on it, aside from maching twister
output against a regular expression. With this change, we can use
the emulation uart within the body of a ZTest.
Testing Done:
```shell
west build -p auto -b qemu_riscv64 -t run tests/drivers/console_switching
...
*** Booting Zephyr OS build zephyr-v3.4.0-4277-gae0d63471be1 ***
Running TESTSUITE console_switching
===================================================================
START - test_read
read "Hello, uart_emul0!" from uart_emul0
read "Hello, uart_emul1!" from uart_emul1
read "Hello, uart_emul0!" from uart_emul0
read "Hello, uart_emul1!" from uart_emul1
PASS - test_read in 0.005 seconds
===================================================================
START - test_write
wrote "Hello, uart_emul0!" to uart_emul0
wrote "Hello, uart_emul1!" to uart_emul1
wrote "Hello, uart_emul0!" to uart_emul0
wrote "Hello, uart_emul1!" to uart_emul1
PASS - test_write in 0.003 seconds
===================================================================
TESTSUITE console_switching succeeded
------ TESTSUITE SUMMARY START ------
SUITE PASS - 100.00% [console_switching]: pass = 2, fail = 0, skip = 0...
- PASS - [console_switching.test_read] duration = 0.005 seconds
- PASS - [console_switching.test_write] duration = 0.003 seconds
------ TESTSUITE SUMMARY END ------
===================================================================
PROJECT EXECUTION SUCCESSFUL
```
Signed-off-by: Christopher Friedt <cfriedt@meta.com>
