boards: h747/h745: Update dual core flash and debug instructions

Review flashing and debugging instructions on these dual core boards.

Signed-off-by: Erwan Gouriou <erwan.gouriou@linaro.org>

boards/arm/nucleo_h745zi_q/doc/index.rst

@@ -216,7 +216,7 @@ Run a serial host program to connect with your NUCLEO-H745ZI-Q board.
 
    $ minicom -b 115200 -D /dev/ttyACM0
 
-or use scrreen:
+or use screen:
 
 .. code-block:: console
 
@@ -235,15 +235,20 @@ You should see the following message on the console:
 
    $ Hello World! nucleo_h745zi_q_m7
 
-Blinky example can also be used:
+.. note::
+  Sometimes, flashing is not working. It is necessary to erase the flash
+  (with STM32CubeProgrammer for example) to make it work again.
+
+Similarly, you can build and flash samples on the M4 target. For this, please
+take care of the resource sharing (UART port used for console for instance).
+
+Here is an example for the :ref:`blinky-sample` application on M4 core.
 
 .. zephyr-app-commands::
    :zephyr-app: samples/basic/blinky
-   :board: nucleo_h745zi_q_m7
+   :board: nucleo_h745zi_q_m4
    :goals: build flash
 
-Same way M4 core can be flashed.
-
 .. note::
 
    Flashing both M4 and M7 and pushing RESTART button on the board leads
@@ -261,6 +266,10 @@ You can debug an application in the usual way.  Here is an example for the
    :maybe-skip-config:
    :goals: debug
 
+Debugging with west is currently not available on Cortex M4 side.
+In order to debug a Zephyr application on Cortex M4 side, you can use
+`STM32CubeIDE`_.
+
 .. _Nucleo H745ZI-Q website:
    https://www.st.com/en/evaluation-tools/nucleo-h745zi-q.html
 

boards/arm/stm32h747i_disco/doc/index.rst

@@ -220,24 +220,6 @@ the USB port to prepare it for flashing. Then build and flash your application.
 
 Here is an example for the :ref:`hello_world` application.
 
-.. zephyr-app-commands::
-   :zephyr-app: samples/hello_world
-   :board: stm32h747i_disco_m7
-   :goals: build
-
-Use the following commands to flash either m7 or m4 target:
-
-.. code-block:: console
-
-   $ ./STM32_Programmer_CLI -c port=SWD mode=UR -w <path_to_m7_binary>  0x8000000
-   $ ./STM32_Programmer_CLI -c port=SWD mode=UR -w <path_to_m4_binary>  0x8100000
-
-Alternatively it is possible to flash with OpenOcd but with some restrictions:
-Sometimes, flashing is not working. It is necessary to erase the flash
-(with STM32CubeProgrammer for example) to make it work again.
-Debugging with OpenOCD is currently working for this board only with Cortex M7,
-not Cortex M4.
-
 .. zephyr-app-commands::
    :zephyr-app: samples/hello_world
    :board: stm32h747i_disco_m7
@@ -255,6 +237,20 @@ You should see the following message on the console:
 
    Hello World! stm32h747i_disco_m7
 
+.. note::
+  Sometimes, flashing is not working. It is necessary to erase the flash
+  (with STM32CubeProgrammer for example) to make it work again.
+
+Similarly, you can build and flash samples on the M4 target. For this, please
+take care of the resource sharing (UART port used for console for instance).
+
+Here is an example for the :ref:`blinky-sample` application on M4 core.
+
+.. zephyr-app-commands::
+   :zephyr-app: samples/basic/blinky
+   :board: stm32h747i_disco_m4
+   :goals: build flash
+
 Debugging
 =========
 
@@ -266,6 +262,9 @@ You can debug an application in the usual way.  Here is an example for the
    :board: stm32h747i_disco_m7
    :goals: debug
 
+Debugging with west is currently not available on Cortex M4 side.
+In order to debug a Zephyr application on Cortex M4 side, you can use
+`STM32CubeIDE`_.
 
 .. _STM32H747I-DISCO website:
    http://www.st.com/en/evaluation-tools/stm32h747i-disco.html
@@ -284,3 +283,6 @@ You can debug an application in the usual way.  Here is an example for the
 
 .. _DISCO_H747I modifications for Ethernet:
    https://os.mbed.com/teams/ST/wiki/DISCO_H747I-modifications-for-Ethernet
+
+.. _STM32CubeIDE:
+   https://www.st.com/en/development-tools/stm32cubeide.html