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Using prepared LittleFS image

Prepared image file can be flashed to K210 board, if not flashed, the file system will be formated after first boot.

LittleFS image can be prepared on host and flashed to K210 board:

Prepare the image

Copy the files to be included on LittleFS into mklittlefs/internalfs_image/ directory. Subdirectories can also be added.

Change the working directory to mklittlefs.
The image file is created using mklfs utility.

Usage:
  mklfs [-b block_size] [-c block_count] [-l lookahead_size] image_dir image_name
      block_size: default=512   (MICRO_PY_LITTLEFS_SECTOR_SIZE)
     block_count: default=20480 (MICRO_PY_FLASHFS_SIZE / MICRO_PY_LITTLEFS_SECTOR_SIZE)
  lookahead_size: default=32    (LITTLEFS_CFG_LOOKAHEAD_SIZE)

If using the dafault Flash file system parameters defined in mpconfigport.h, you only have to provide input directory and output file name

Execute:

./mklfs <image_input_dir> <image_name>

Example:

./mklfs internalfs_image MicroPython_lfs.img

Creating LittleFS image
=======================
Image directory:
  'internalfs_image'
Image name:
  'MicroPythony_lfs.img'
Block size=512, Block count=20480, lookahead=32

Creating and mounting LittleFS image...
  Image file created.
  Image file formated.
  Image file mounted.

Adding files from image directory:
  'internalfs_image'
----------------------------------

/examples [D]
/examples/display [D]
/examples/display/test1.jpg
/examples/display/test2.jpg
/examples/display/test3.jpg
/examples/display/test4.jpg
/examples/display/tiger.bmp
/examples/webserver [D]
/examples/webserver/README.md
/examples/webserver/webserver_example.py
/examples/bme280.py
/examples/sqlite3_example.py
/examples/chinook.db
/examples/wifi_example.py
/examples/ssd1306_i2c_example.py
/fonts [D]
/fonts/arial_bold.fon
/fonts/BigFont.fon
/fonts/DejaVuSans12.fon
/fonts/DejaVuSans18.fon
/fonts/DejaVuSans24.fon
/fonts/DotMatrix_M.fon
/fonts/Grotesk24x48.fon
/fonts/OCR_A_Extended_M.c
/fonts/swiss721_outline.fon
/fonts/Georgia128.fon
/fonts/dot32.fon
/fonts/lobo30.fon
/lib [D]
/www [D]
/www/python.ico
/www/favicon.ico
/www/test.pyhtml
/www/wstest.html
/www/style.css
/www/index.html
/www/pdf.png
/www/pdf-sample.pdf
/boot.py

Image size: 1506897 (1507328)
Saving image to 'MicroPython_lfs.img'
=======================

Flash the image

Change the working directory to k210-freertos.

The image must be flashed to the file system start address defined in mpconfigport.h (MICRO_PY_FLASHFS_START_ADDRESS).
Default address is at 4MB (4194304).

To flash it, execute:

./kflash.py -p /dev/ttyUSB0 -b 2000000 --address 4194304 -t ../mklittlefs/MicroPython_lfs.img

Change /dev/ttyUSB0 to the port used to connect to the board if needed.