micropython: add micropython component

components/language/micropython/docs/renesas-ra/tutorial/reset.rst

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+.. _renesas-ra_reset:
+
+Reset and boot mode
+===================
+
+Resetting the board
+-------------------
+
+If something goes wrong, you can reset the board in two ways. The first is
+to press CTRL-D at the MicroPython prompt, which performs a soft reset.
+You will see a message something like ::
+
+    MPY: sync filesystems
+    MPY: soft reboot
+    MicroPython v1.18-293-g339aa09b8-dirty on 2022-03-26; RA6M2_EK with RA6M2
+    Type "help()" for more information.
+    >>>
+
+If that isn't working you can perform a hard reset (turn-it-off-and-on-again)
+by pressing the RESET button. This will end your session, disconnecting
+whatever program (PuTTY, screen, etc) that you used to connect to the board.
+
+boot mode
+---------
+
+There are 3 boot modes:
+
+  * normal boot mode
+  * safe boot mode
+  * factory filesystem boot mode
+
+boot.py and main.py are executed on "normal boot mode".
+
+boot.py and main.py are *NOT* executed on "safe boot mode".
+
+The file system of internal flash is initialized and *all files are erased* on "factory filesystem boot mode".
+
+For changing boot mode, please push the RESET button with pressing USER SW1
+on the board:
+
+  * For normal boot mode, release the USER SW1 after LED1 flashes 4 times or more
+
+  * For safe boot mode, release the USER SW1 after LED1 flashes 2 times
+
+  * For factory file system boot mode, release the USER SW1 after LED1 flashes 3 times.
+
+You have created the main.py which executes LED1 blinking in the previous part.
+If you change the boot mode to safe boot mode, the MicroPython starts without
+the execution of main.py. Then you can remove the main.py by following
+command or change the boot mode to factory file system boot mode.::
+
+    import os
+    os.remove('main.py')
+
+or change the boot mode to factory file system boot mode.
+
+You can confirm that the initialized file system that there are only boot.py and main.py files.::
+
+    import os
+    os.listdir()
+