boards: 96b_nitrogen: Add support for flash/debug with pyOCD

Signed-off-by: Kumar Gala <[email protected]>

boards/arm/96b_nitrogen/Makefile.board

@@ -0,0 +1,6 @@
+FLASH_SCRIPT = pyocd.sh
+DEBUG_SCRIPT = pyocd.sh
+
+PYOCD_TARGET = nrf52
+
+export FLASH_SCRIPT PYOCD_TARGET

boards/arm/96b_nitrogen/doc/96b_nitrogen.rst

@@ -267,22 +267,25 @@ and install a more recent version of pyOCD.
 Flashing an Application to 96Boards Nitrogen
 ============================================
 
-The sample application :ref:`hello_world` is being used in this tutorial:
+This example uses the :ref:`hello_world` sample with the
+:ref:`nxp_opensda_pyocd` tools. Use the ``make flash`` build target to build
+your Zephyr application, invoke the pyOCD flash tool and program your Zephyr
+application to flash.
 
 .. code-block:: console
 
-   $<zephyr_root_path>/samples/hello_world
+   $ cd <zephyr_root_path>
+   $ . zephyr-env.sh
+   $ cd samples/hello_world/
+   $ make BOARD=96b_nitrogen
 
-To build the Zephyr kernel and application, enter:
+You can either flash the board by using the `make flash` target:
 
 .. code-block:: console
 
-   $ cd <zephyr_root_path>
-   $ source zephyr-env.sh
-   $ cd $ZEPHYR_BASE/samples/hello_world/
-   $ make BOARD=96b_nitrogen
+   $ make flash
 
-Connect the micro-USB cable to the 96Boards Nitrogen and to your computer.
+or you can invoke the pyocd commands directly, as described below.
 
 Erase the flash memory in the nRF52832: