4. Reset and boot mode露
4.1. Resetting the board露
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鈥檛 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.
4.2. boot mode露
There are 3 boot modes:
normal boot mode
safe boot mode
factory filesystem boot mode
boot.py and main.py are executed on 鈥渘ormal boot mode鈥.
boot.py and main.py are NOT executed on 鈥渟afe boot mode鈥.
The file system of internal flash is initialized and all files are erased on 鈥渇actory filesystem boot mode鈥.
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()