patchAVR Downloader/UploaDEr - Patches: patch #7680, Fixing timeout problem in ser_recv...


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patch #7680: Fixing timeout problem in ser_recv in ser_win32.c

Submitted by:  Rene Liebscher <rliebscher>
Submitted on:  Tue 29 Nov 2011 08:10:15 PM UTC  
Category:  None Priority:  5 - Normal
Status:  Ready For Test Privacy:  Public
Assigned to:  Rene Liebscher <rliebscher> Open/Closed:  Closed

Sat 17 Dec 2011 08:44:01 PM UTC, comment #2:

Implemented in svn revision 1024

Rene Liebscher <rliebscher>
Project MemberIn charge of this item.
Tue 13 Dec 2011 03:51:03 PM UTC, comment #1:

Some measurements when using the bus pirate without a connected mcu (so it fails to initialize it and returns with error, but to do this it already send several commands to the bus pirate.)

  • original code:
    • binary mode : 0m20.329s
    • ascii mode : 4m11.766s
  • patched code:
    • binary mode : 0m1.156s
    • ascii mode : 0m3.547s

Command line for binary mode:

Command line for ascii mode:

Rene Liebscher <rliebscher>
Project MemberIn charge of this item.
Tue 29 Nov 2011 08:10:15 PM UTC, original submission:

The Windows code for ser_recv does not support a correct return value in case of a timeout. (It returns 0.) The other code in ser_posix.c returns -1 in this case.
This patch just returns -1 at timeout.

Without this patch you need with a bus pirate as programmer every time when it waits for the prompt about 10s (in buspirate_readline_noexit(), 4 characters read and 95 times the timeout of 100ms to fill the complete buffer, as it does not recognize the timeout without this patch).

PS: May be it would be better to change the return code of ser_recv to return the number of read bytes. Currently you can not know how many bytes are really read by the function.

Rene Liebscher <rliebscher>
Project MemberIn charge of this item.


Attached Files
file #24503:  ser_win32.patch added by rliebscher (399B - application/octet-stream)


Depends on the following items: None found

Items that depend on this one: None found


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    Follow 6 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2013-09-03 rliebscher Open/ClosedOpen => Closed
    2011-12-29 rliebscher StatusNone => Ready For Test
        Open/ClosedClosed => Open
    2011-12-17 rliebscher Assigned toNone => rliebscher
        Open/ClosedOpen => Closed
    2011-11-29 rliebscher Attached File- => Added ser_win32.patch, #24503

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