[avrdude-dev] [patch #6789] speed up avr910 ans stk500v2 for (old) non pagemode devices

[Klaus Leidinger]

URL:
  <http://savannah.nongnu.org/patch/?6789>

                 Summary: speed up avr910 ans stk500v2 for (old) non pagemode
devices
                 Project: AVR Downloader/UploaDEr
            Submitted by: kllei
            Submitted on: Mo 23 Mär 2009 13:48:38 GMT
                Category: None
                Priority: 5 - Normal
                  Status: None
                 Privacy: Public
             Assigned to: None
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any

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Details:

as mentioned from Jens Wulf the avr.c refuses a block transfer when the
target device does not support page mode flash writing.

" 
    if (pgm->paged_write != NULL && m->page_size != 0) {
                                 ^^^^^^^^^^^^^^^^^^^^
this condition, which is necessary in avr.c, avr_write() and avr_read(). "

Removing this check in read and write section of avr.c speeds up writing of
8K into AT90S8535 with avr910 from 33.41 to 20.56 sec. and read (verify) from
17.36 to 2.70 sec.

This also speeds up a stk500v2 programmer for the same controller from 74.61
to 24.98 secs. and verify from 25.05 to 5.22 secs.

please check if this has implications to other programmers.

Kind Regards,
Klaus

 



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File Attachments:


-------------------------------------------------------
Date: Mo 23 Mär 2009 13:48:38 GMT  Name: avr.c.patch  Size: 2kB   By: kllei

<http://savannah.nongnu.org/patch/download.php?file_id=17774>

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