[avrdude-dev] [bug #25701] AVR910 avr910_read_byte_flash() cannot read high byte

[Joerg Wunsch]

URL:
  <http://savannah.nongnu.org/bugs/?25701>

                 Summary: AVR910 avr910_read_byte_flash() cannot read high
byte
                 Project: AVR Downloader/UploaDEr
            Submitted by: joerg_wunsch
            Submitted on: Wed 25 Feb 2009 09:51:58 AM CET
                Category: None
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: None
                  Status: None
                 Privacy: Public
             Assigned to: None
         Originator Name: Jörg Wunsch
        Originator Email: address@hidden
             Open/Closed: Open
         Discussion Lock: Any

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Details:

In rev 1.22 of avr910.c, the cache for the high byte in
avr910_read_byte_flash() has been turned off.  This happened
as a consequence of applying patch #3277 which claims to
fix several problems with paged writes.

However, as the code looks now, avr910_read_byte_flash()
cannot return a high byte anymore at all.

Either the claim of patch #3277 proves bogus, then the byte
cache should be turned on again, or we have to take care in
avr910_read_byte_flash() to extract the correct byte out of
those two bytes returned in response to the `R' command.




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