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AVR DOS KILL

 
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njepsen

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Joined: 13 Aug 2007
Posts: 371

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PostPosted: Fri Feb 22, 2019 3:40 am    Post subject: AVR DOS KILL Reply with quote

I am having trouble with the KILL command. I am logging data to an SD card., and from time to time ( and I dont know how) I end up with a file that is zero bytes long.
eg xxxxxxxx.TXT I detect these files and try to kill them thus:
( as the code is very long, only the relevant bits are shown)



Code:


       '*******************************************************************************
   $regfile = "m1284pdef.dat"                                  'my processor
   $crystal = 9830400                                          'system crystal
   $framesize = 800                                            ' Located at top of 16k of SRAM
   $hwstack = 550                                              '
   $swstack = 550                                              '
   $frameprotect = 1
   stop watchdog


      If Msg_id = 0 Then                                  
         Print #1 , ">> deleting " ; Myfilename
         Chdir "\"
         Chdir Cachefoldernamestr
         Kill Myfilename                                    'delete from sd card
                 
      End If


The code works fine, and has been for several years, except when a zero file arrives, then the code hangs, immediately at "kill myfilename"
I have got round the issue but my question is - does kill not work with a zero length file?

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albertsm

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Joined: 09 Apr 2004
Posts: 4722
Location: Holland

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PostPosted: Fri Feb 22, 2019 9:43 pm    Post subject: Reply with quote

you should log the Gbdoserror value.
It should be 0.

Do you know about the SIMULATE AVR DOS.bas sample in the avr-dos folder?
It is a great way to test things without hardware.

I tried this :

Code:
Print "Kill test"
Open "testx.bin" For Binary As #11
Flush #11
Close #11
Kill "testx.bin"
 


and i got gbDOSerror 0
So it seems to work ok.
you best log this error in your code when it is non zero in order to have a clue.

you should also make some tests like the one i did to see if it is reproducible with a small program.

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