FreeRTOS+FAT File update time

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1

Hello

I use FreeRTOS + FAT with Renesas RA6M3.

I write data to a file on the SD card.

When I look at a file on my PC, the update time is blank.
How do I set the write time?

2

Hi @taki. Can you check your ffconfigTIME_SUPPORT config. It is disabled by default over here. A lot of time functions are conditionally compiled and if this config is off, no timestamps are written.

Also, if the time support is ON, you must implement the time_t FreeRTOS_time( time_t *pxTime ); function for your specific platform. This function fetches the current time.

3

Thank you for reply.

ffconfigTIME_SUPPORT was 0.
Change it to 1 and check.

4

Are there any documents about time_t FreeRTOS_time( time_t *pxTime )?
I would like to use it for implementation.

When I set ffconfigTIME_SUPPORT to 1, many errors occurred in ff_studio.c.

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Can you tell me how to fix it?

5

Here is the documentation: FreeRTOS-Plus-FAT Configuration - FreeRTOS™.

6

Please make sure that ffconfigTIME_SUPPORT is defined in your copy of FreeRTOSFATConfig.h, and nowhere else.

Also make sure that there is only one visible FreeRTOSFATConfig.h

Can you also show the compilation error in English, or translate it?

7

Thank you for reply.

I understand that I have to write FreeRTOS_time().
Sorry, I don’t know what to write in FreeRTOS_time().
Are there any samples?

I have confirmed that FreeRTOS_time() is declared.
It is called within FF_GetSystemTime().

8

Thank you for reply.

I checked it. Only FreeRTOSFATConfig.h.

I write error message in English below.
Field ‘Day’ cannot be resolved
Field ‘ff_atime’ cannot be resolved
Field ‘ff_ctime’ cannot be resolved

Content is the same, just the items change
Hour,Minute,Month,Seconds,xAccessedTime,xCreateTime, etc.

9

Can you do a little test in ff_stdio.c, around line 1024 in ff_stat(), add the following dummy code:

 #if ( ffconfigTIME_SUPPORT == 1 )
 {
     pxStatBuffer->ff_atime = ( unsigned long ) prvFileTime( &( xDirEntry.xAccessedTime ) );
     pxStatBuffer->ff_mtime = ( unsigned long ) prvFileTime( &( xDirEntry.xModifiedTime ) );
     pxStatBuffer->ff_ctime = ( unsigned long ) prvFileTime( &( xDirEntry.xCreateTime ) );
+    if (pxStatBuffer->st_ino)
+    {
+        // Should be good
+    }
+    if (pxStatBuffer->ff_ctime)
+    {
+        // Should be good
+    }
+    if (pxStatBuffer->ff_xtime)
+    {
+        // Should give an error
+    }
}
#endif

In other words, I want to know the value of ffconfigTIME_SUPPORT at the moment struct FF_STAT is declared in ff_stdio.h

10

I added the code and build

Error occuured
error: ‘FF_Stat_t’ {aka ‘struct FF_STAT’} has no member named ‘ff_xtime’

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What am I doing wrong?

11

I implemented FreeRTOS_time() that I found online.

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The date and time are fixed values.
The error has disappeared, but the file creation date and time remains blank.
Could you tell me what I should check?

EDIT
Note that pxTime must be set to GMT, not the local time.

12

The existing files will remain without a timestamp. What if you create new files? Do they get a time-stamp “July 6, 2025” ?

13

No it is good, you can take the test code away. These now compile well:

Field ‘Day’ cannot be resolved
Field ‘ff_atime’ cannot be resolved
Field ‘ff_ctime’ cannot be resolved
14

I was able to write it by adding the following description after FF_GetSystemTime

Thank you very much

FF_GetSystemTime( &pxDirEntry->xAccessedTime );

                //20025/07/08 add
                pxDirEntry->xCreateTime   = pxDirEntry->xAccessedTime;
                pxDirEntry->xModifiedTime = pxDirEntry->xAccessedTime;