slow fflush on ME9210 - NetOs

Embedded Devices NET+OS
1

Hi

I’m trying to make blank 32k file.
I open file, use seek function to go to end of file, write 0 and then execute fflush.

It takes almost 10 minutes to create blank 32k file.

Is there way to speed up and why is so slow?

2

can you post your code here?

Also can you tell me why are you doing this?

3

Hi

What version of NET+OS?
What module are you running this on?
Are you writing to RAM (file system) or FLASH (file system)?

4

Hi
I’m porting Sedona (sedonadev.org) virtual machine to NetOs 7.5 and ME9210, sedona creates one empty 32k file to use for histories. I can’t change that because it is part of Sedona .

This is simple version how code looks, I tested this and takes a 5-10 min to flush this to drive, and program is stuck on fflush.

FILE* fp;
char* FileName="FLASH0/test.data";

/* Initialize the system services for the application. */
initAppServices();

//delete file
remove(FileName);
// create file
printf ("Create File: %s",FileName);
fp = fopen(FileName, "a+b");
fclose(fp);
// open file
fp = fopen(FileName, "r+b");
// go to end
fseek(fp, 32768, SEEK_SET);
// write to end
fputc(0x00, fp);
// flush
fflush(fp);
// close
fclose(fp);
5

Hi
Thanks for answer , check my comment below.

6

Hello

Is there anyway you can replace the fseek, fputc and fflush with an fwrite and fflush. You can write 32kb of anything to FLASH in no time. I know you originally stated you can’t but I figured I’d ask once more.