ESP8266 Community Forum

Posted: **Sat Nov 21, 2015 8:08 pm**

Hello,

Is there any example of how to use this.

https://github.com/esp8266/Arduino/blob ... ce.md#info

I have tried.

    struct FSInfo {
      size_t totalBytes;
      size_t usedBytes;
      size_t blockSize;
      size_t pageSize;
      size_t maxOpenFiles;
      size_t maxPathLength;
    };
    FSInfo fs_info;
    SPIFFS.info(fs_info);
    int FlashSize = totalBytes;
    FlashSize -= totalBytes;

but get the following msg at compile time

Code: Select all

Functions_and_var_management.ino: In function 'String GetMeThatVar(String)':
Functions_and_var_management.ino:144:24: error: no matching function for call to 'fs::FS::info(GetMeThatVar(String)::FSInfo&)'
Functions_and_var_management.ino:144:24: note: candidate is:
In file included from ESP8266Basic.ino:31:0:
C:\Users\user\AppData\Roaming\Arduino15\packages\esp8266\hardware\esp8266\2.0.0-rc1\cores\esp8266/FS.h:96:10: note: bool fs::FS::info(uint32_t*, uint32_t*)
     bool info(uint32_t *total, uint32_t *used);
          ^
C:\Users\user\AppData\Roaming\Arduino15\packages\esp8266\hardware\esp8266\2.0.0-rc1\cores\esp8266/FS.h:96:10: note:   candidate expects 2 arguments, 1 provided
Functions_and_var_management.ino:145:21: error: 'totalBytes' was not declared in this scope
no matching function for call to 'fs::FS::info(GetMeThatVar(String)::FSInfo&)'

Posted: **Sat Nov 21, 2015 11:45 pm**

viewtopic.php?f=6&t=6470&start=5#p33588

Not to sure but this has some spiffs stuff in the code ...

It appears that spiffs has to be initialized first maybe this is just for his code and the way it is setup IDK I only read a little bit of it but is it possible that you must first initialize the file storage system before you get this data you are trying to get?

Posted: **Sun Nov 22, 2015 10:21 am**

First, you need to pass pointer to the structure, second, you need to access member of the structure :

Code: Select all

FSInfo fs_info;
SPIFFS.info(&fs_info);
int FlashSize = fs_info.totalBytes;

Posted: **Sun Nov 22, 2015 11:08 am**

Ok. Just tried this.

Code: Select all

    struct FSInfo {
      size_t totalBytes;
      size_t usedBytes;
      size_t blockSize;
      size_t pageSize;
      size_t maxOpenFiles;
      size_t maxPathLength;
    };



    FSInfo fs_info;
    SPIFFS.info(&fs_info);
    int Flashfree = fs_info.totalBytes - fs_info.usedBytes;
    MyOut = String(Flashfree );

Getting this as the compiler error. I am not too familiar with these Structs

Code: Select all

Functions_and_var_management.ino: In function 'String GetMeThatVar(String)':
Functions_and_var_management.ino:139:25: error: no matching function for call to 'fs::FS::info(FSInfo*)'
Functions_and_var_management.ino:139:25: note: candidate is:
In file included from ESP8266Basic.ino:31:0:
C:\Users\user\AppData\Roaming\Arduino15\packages\esp8266\hardware\esp8266\2.0.0-rc1\cores\esp8266/FS.h:96:10: note: bool fs::FS::info(uint32_t*, uint32_t*)
     bool info(uint32_t *total, uint32_t *used);
          ^
C:\Users\user\AppData\Roaming\Arduino15\packages\esp8266\hardware\esp8266\2.0.0-rc1\cores\esp8266/FS.h:96:10: note:   candidate expects 2 arguments, 1 provided
no matching function for call to 'fs::FS::info(FSInfo*)'

ESP8266 Community Forum

Example for using

Example for using

Re: Example for using

Re: Example for using

Re: Example for using