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Find a directory and write a file

 
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soldeersmurf

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Joined: 07 Apr 2014
Posts: 5

PostPosted: Sat Oct 24, 2015 1:47 am    Post subject: Find a directory and write a file Reply with quote

Hi Niclas,
Thanks again for your nice work!
My (daily) logging application worked fine for about 3/4 year. I guess the root directory was full (but could not verify that), so I decided to create subdirs for each month to write a daily file.
Q: FAT32 directories supposedly have no limit; does Kokkekat automatically make the extension?

So, I first try to find a directory (for the present month), and try to write a file to it if it exists.
I can indeed find the dir (gosub sdfindentryindirectory gives sdstatus=48 and sdclusterd=NN). The value NN seems OK after inspection with a diskeditor. It is indeed the place where the directory resides.
Now creating a file there :
gosub sdreadfsinfo
sdcreatemode = 0
sdstartclusterd= NN
gosub sdcreatefileordir
screws up the card (there is no new dir-entry made in cluster NN, and the card is made inaccessible)

Also, trying to find a directory followed by creating a new directory in the root fails.......

However, if the first program action is to create a directory (in the root, sdstartclusterd= 0), catch the right (dir) cluster, and try to create a file-entry in the new directory it does work.

Appending to an existing file also works (I know the filename, so no need to use sdfindentryindirectory)

So it seems that finding a file with sdfindentryindirectory is causing some change which I cannot find. It looks that when I start 'fresh', creation goes well.
Q: I guess I could execute an sdinitfs after a search? Should I or is there another cure?

BTW. I disabled sdusedirlist but use sdusefind.

Another question: Do I have to use fsinfo? Omitting it would free up some valuable bytes of codespace....

I dearly missed the Find_dir_and_write_file example. Sad

Best regards,
Michael
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soldeersmurf

Bascom Member



Joined: 07 Apr 2014
Posts: 5

PostPosted: Mon Oct 26, 2015 3:08 am    Post subject: Reply with quote

Hi Niclas,
I tried executing sdfsinit after the search, to no avail.
So I made a workaround by storing the clusternumber in EEprom after a search (and two flags: searched and match) and restart the program (JMP 0).
After the restart my code first reads the flags, to see if a search was executed last time and if there was a match found. It will reset the 'searched'-flag. If the match-flag was set, the clusternumber is read and used to write files....... The 'search-made' flag.
Maybe a bit complicated, but it works.
Regards,
Michael
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