Is FS module compatible with ESP32?

MicroEJ SDK
1

Hello,

I am trying to use the File System module to access non-volatile memory on my hardware, but it seems that I don’t have its C implementation. I am working on the ESP32 platform, here is my architecture:
Platform architecture

And here are the modules in my platform configuration:
modules

I can build my platform and my Java app using the FS dependency set in Ivy. When I build the C code, it fails at the link with Java. I get a lot of error like that:
undefined reference to `Java_com_is2t_java_io_GenericFileSystem_lengthNative’

I have searched in the bsp project for these functions and I have only found their declarations in header files. So my question is: Does the C implementation of the FS module exists for the ESP32 platform? If yes, where can I find it?

Best regards,
Yoann Jézégou, developer at Otodo

2

Hi Yoann,

Which version of the platform are you using?

When using the packaging on the Getting Started page [1] using the full packaging version 1.5.1 (architecture and platform), I find the FS implementation here:

ESP32WROVER-HDAHT-fullPackaging-eval-1.5.1\platformSource\ESP32WROVER-HDAHT-platformSource\ESP32WROVER-HDAHT-1.5.1-bsp\Projects\microej\fs\src

I did not test the full link yet.
I’ll come back with more information.

Gaëtan for MicroEJ

3

Also could you please give us the full trace from the console for the link error?

4

Hello,

The FS implementation you gave me was what I was looking for. After some changes because I use ESP-IDF 4.1, it compiles fine. This subject can be closed, thanks for your help.

Best regards,
Yoann Jézégou, developer at Otodo