Add LittleFS libs from ESP8266 project

[kolos]

"User data" partition definitions needs to be moved from LittleFS.cpp to the boards definitions.

Currently hardcoded for my test board variant: CB2S

[nsavga]

hello,
i tried your pull request by manually merging it to master locally, as I need to implement LittleFS to work with WBR3 but it created a lot of compile time errors. most of them look like they are related to some libretiny macros.
are you planning to finalize your pull request work soon?
thanks & regards

[kolos]

Feel free to continue,
I'm only using the methods needed for AsyncWebServer's serveStatic method; file upload and serve.

It's tested on CB2S and WB2S.

[nsavga]

thanks a lot!

i would appreciate if you could provide example linker script definitions you used for CB2S and WB2S,
FLASH_USERDATA_OFFSET and FLASH_USERDATA_LENGTH. I am not sure how to determine/find them for WBR3 yet, but it would be helpful as a starting point.

kind regards

[kolos]

Create a libretiny platformio project, it will do the definitions for those constants.

For example, here is my platformio.ini file:

; PlatformIO Project Configuration File
;
;   Build options: build flags, source filter
;   Upload options: custom upload port, speed and extra flags
;   Library options: dependencies, extra library storages
;   Advanced options: extra scripting
;
; Please visit documentation for the other options and examples
; https://docs.platformio.org/page/projectconf.html

[env:wb2s]
platform = libretiny
board = wb2s
framework = arduino
lib_deps = esphome/ESPAsyncWebServer-esphome@^3.1.0
upload_speed = 115200
monitor_speed = 115200
build_src_flags = -include Arduino.h
build_flags = 
	-DCONFIG_ASYNC_TCP_STACK_SIZE=4096
	-DLT_LOGLEVEL=LT_LEVEL_NONE
	-DLT_UART_SILENT_ALL=1
	-DLT_USE_TIME=1
;	-DconfigUSE_RECURSIVE_MUTEXES=1
	-DUSE_ARDUINO
	-DUSE_LIBRETUYA
	-Wno-sign-compare
	-Wno-unused-but-set-variable
	-Wno-unused-variable
	-Wno-unused-function
	-fno-exceptions

[Mit4el]

@kolos @nsavga You can help me. I don't understand how to build and upload FS to the chip. I have a bk7231n.

I took the libraries that you wrote, everything was assembled, but how to upload files to the FS.
Do you have an open project where you can view work with LittleFS?

[kolos]

I'm using ESPAsyncWebserver like this:

#include <ESPAsyncWebServer.h>
#include "LittleFS.h"

AsyncWebServer server(80);

void handleUpload(AsyncWebServerRequest *request, String filename, size_t index, uint8_t *data, size_t len, bool final) {
  if (!index) {
    request->_tempFile = LittleFS.open("/" + filename, "w");
  }

  if (len) {
    request->_tempFile.write(data, len);
  }

  if (final) {
    request->_tempFile.close();
    request->redirect("/");
  }
}

void setup_webserver() {
  LittleFS.begin();

  server.on("/upload", HTTP_POST, [](AsyncWebServerRequest *request) {
    request->send(200);
  }, handleUpload);
  
  server.serveStatic("/", LittleFS, "/");

  server.begin();
}

and uploading files via curl:

curl -F "file=@index.html.gz;filename=index.htm.gz" http://192.168.1.123/upload

[Mit4el]

curl -F "file=@index.html.gz;filename=index.htm.gz " http://192.168.1.123/upload

Thank you, but is it impossible to download with firmware? I mean, build a bin and flash it at ltchiptool.
I have a configuration in the file and I need it when starting the firmware.
And another question, have you tried to launch the FS Browser from ESP?

[kuba2k2]

You can flash any binary image using ltchiptool, provided that you enter the correct starting offset. You will need to have a binary image of the LittleFS of the correct size.

[Mit4el]

correct size

Is it possible to automate this in the script ~/.platformio/platforms/libretiny/builder/utils/ltchiptool-util.py or create a separate script using the FLASH_USERDATA_OFFSET and FLASH_USERDATA_LENGTH data from the board settings.
To create a bin file of the required size and submit it to ltchiptool.
Unfortunately, I don't have enough knowledge of python((

[Mit4el]

I can probably use the mklittlefs tool from esp8266/esp32, and then ltchiptool and write everything in extra_scripts = pre:tools/fsbuildscript.py
Or even add an env.AddPlatformTarget to make the button appear in platformio

[Mit4el]

I wrote a script for the building file system by bk7231n. It works if you register it in platformio.ini
extra_scripts = pre:tools/this_script.py
In folder $Project/tools add this_script.py and mklittlefs.exe
I am not an expert in python, the code can be made better))

import subprocess
from os.path import basename, join, normpath
Import("env")
from platformio.platform.base import PlatformBase
from platformio.platform.board import PlatformBoardConfig
platform: PlatformBase = env.PioPlatform()

import subprocess
from os.path import basename, join, normpath
Import("env")
from platformio.platform.base import PlatformBase
from platformio.platform.board import PlatformBoardConfig
platform: PlatformBase = env.PioPlatform()

def build_ltfs():
    print("Current Data dir", env.get("PROJECT_DATA_DIR"))
    pathmk = env.get("PROJECT_DIR")+ "/tools/mklittlefs.exe"
    pathmk = normpath(pathmk).replace("\\", "/")
    print("Current tools dir", pathmk)
    FS_SIZE ="0x25000"
    FS_PAGE = "0x100"
    FS_BLOCK = "0x1000" 
    subprocess.call([pathmk, "-c", env.get("PROJECT_DATA_DIR"), "-s", FS_SIZE, "-p", FS_PAGE, "-b", FS_BLOCK, "lt_littlefs.bin", ])
    print("------------!!!!!!!!!-------------")
    print("FS_SIZE", FS_SIZE)
    print("FS_PAGE", FS_PAGE)
    print("FS_BLOCK", FS_BLOCK)
    print("------------!!!!!!!!!-------------") 

build_ltfs()

Upload through the gui ltchiptool
it works))