board: arm: nucleo_f746zg: flashing

Add the possibility to flash nucleo-f746zg board using west
STM32CubeProgrammer runner.

Signed-off-by: Abderrahmane Jarmouni <abderrahmane.jarmouni-ext@st.com>

boards/st/nucleo_f746zg/board.cmake

@@ -1,6 +1,8 @@
 # SPDX-License-Identifier: Apache-2.0
 
+board_runner_args(stm32cubeprogrammer "--port=swd" "--reset-mode=hw")
 board_runner_args(jlink "--device=STM32F746ZG" "--speed=4000")
 
+include(${ZEPHYR_BASE}/boards/common/stm32cubeprogrammer.board.cmake)
 include(${ZEPHYR_BASE}/boards/common/openocd.board.cmake)
 include(${ZEPHYR_BASE}/boards/common/jlink.board.cmake)

boards/st/nucleo_f746zg/doc/index.rst

@@ -189,6 +189,17 @@ Nucleo F746ZG board includes an ST-LINK/V2-1 embedded debug tool interface.
 Flashing an application to Nucleo F746ZG
 ----------------------------------------
 
+The board is configured to be flashed using west `STM32CubeProgrammer`_ runner,
+so its installation is required to be able to flash the board.
+
+Alternatively, openocd (provided in Zephyr SDK) or JLink can also be used to
+flash the board using the ``--runner`` (or ``-r``) option:
+
+.. code-block:: console
+
+   $ west flash --runner openocd
+   $ west flash --runner jlink
+
 Here is an example for the :ref:`hello_world` application.
 
 Run a serial host program to connect with your Nucleo board.
@@ -233,3 +244,6 @@ You can debug an application in the usual way.  Here is an example for the
 
 .. _STM32F746 reference manual:
    https://www.st.com/resource/en/reference_manual/dm00124865.pdf
+
+.. _STM32CubeProgrammer:
+   https://www.st.com/en/development-tools/stm32cubeprog.html