Merge pull request #14805 from rkotan/I2C_Multiple_Buses_fix ...

i2c: fix issue #14735 with multiple buses

Merge pull request #14688 from MubeenHCLite/CAN_rxinterrupt_fix ...

Solution for mutex problem in CAN read ISR

Corrected the conditional compilation of RawCAN.

Merge pull request #14881 from jeromecoutant/PR_LED1 ...

Standard Pin Name: LED1 issue for targets without LED

Indentation set for the comments

Remove `#ifdef UNITTEST` from MbedCRC.h ...

Production code should not contain any test-specific checks. Rather
than checking `UNITTEST`, MbedCRC.h can simply include in all cases
<mstd_type_traits> whose unit test stub exists.

Also remove the `UNITTEST` macro from CMake definitions of kvstore
unit tests which depend on MbedCRC.h.

generic_tests update for targets without LED1

Added documentation for the implementation

Spell check corrected

Resolved review comments

Resolving the astyle error

Updated the Licenses for RawCAN and aligned indentation

Added a newline at the end of RawCAN.cpp

Removed the new line at the end of file.

Merge pull request #14828 from hazzlim/add-cmake-supports-psa-tests ...

CMake: Add CMake to mbed-psa greentea tests

Merge branch 'master' into CAN_rxinterrupt_fix

CMake: Require TEST_SOURCES in greentea CMake file ...

Assumption that greentea test file is always named main.cpp is
incorrect. Updated mbed_greentea_add_test() macro to make TEST_SOURCES
parameter compulsory, which is used to specify greentea test
file(s). This allows tests to use C, or have a different name.
Therefore also updated all pre-existing greentea test CMake files to
explicity add main.cpp to TEST_SOURCES.

Added Raw CAN (unlocked can read api) and updated the code for the ...

rxInterrupt to work for all CAN instances

Merge pull request #14786 from ARMmbed/move_drivers_stub ...

Move mbed-stubs-drivers to the drivers directory

CMake: unit-tests: Make drivers stub only depend on headers it uses ...

Previously the drivers stub library depended on `mbed-headers`, which
is a collection of all available headers in mbed-os. To make it easier
to separate the library, only depend on the headers we're using.

CMake: unit-tests: Move mbed-headers-drivers to the drivers directory ...

Move the header-only mbed-headers-drivers library the unit test stubs
depend on into the drivers component directory. This makes the drivers
stubs more self-contained and improves the composition of the library.

CMake: Move drivers stubs to the mbed-os/drivers directory ...

Move the drivers stub library into the drivers component directory.
so we can avoid duplicating the mbed-os source tree in a central
UNITTESTS folder.

CMake: unit-tests: Make drivers UNITTESTS only depend on headers it uses ...

Previously the drivers unit tests depended on `mbed-headers`, which
is a collection of all available headers in mbed-os. To make it easier
to separate the library, only depend on the headers we're using.

CMake: unit-tests: Pwmout & Watchdog: Remove trailing whitespace

Fix hanging with multiple I2C buses ...

Make the _mutex non-static and remove _owner and acquire()

When two or more I2C buses are used then static__mutex and _owner are
shared between all I2C class instances in the program. That
wastes time to reconfigure periphery on every transfer.

Make _mutex non-static. Remove _owner and acquire() method
because in non-static case they have no practical meaning.

CMake: Only build unit tests if Mbed OS is the current project ...

Typically when adding a unit test directory to a CMake project a check
will be used to ensure the subdirectory is added only if the following
are true:

* The BUILD_TESTING option is set to ON.
* The current CMake project is the top-level project.

The reason being, if a downstream project includes our project they
generally don't want to build our unit tests.

In mbed-os, we do correctly specify the above condition before adding
the central UNITTEST subdirectory, which fetches googletest and adds the
"stub" libraries the unit tests depend on. However, we only check if
CMAKE_CROSSCOMPILING is OFF (or undefined) before actually adding the
unit tests. This mismatched logic would lead to unexpected build
failures in various scenarios. One likely case could be: a downstream
project including mbed-os happens to set CMAKE_CROSSCOMPILING to
OFF/undefined for any reason (possibly to build its own unit tests).
mbed-os would go ahead and attempt to build its tests without fetching
googletest or adding the required stub targets.

To fix the issue replace the check for CMAKE_CROSSCOMPILING in the unit
tests with the same BUILD_TESTING idiom we use for adding the central
UNITTESTS subdirectory.

Merge pull request #14675 from 0xc0170/fix_i2c_start ...

i2c: `start()` should aquire the bus

CMake: Remove all unittest.cmake script from test suite ...

- Remove redundant cmake script as already added the CMake configuration file
- Remove redundant empty_baseline as it is no longer needed with the help of CMake configuration file

Merge pull request #14662 from AGlass0fMilk/can-message-comparison-operators ...

Add CANMessage deep comparison operators

Merge pull request #14678 from ghseb/uartserial-shadowing-2 ...

Serial: remove shadowing member variables