[avrdude-dev] [bug #28344] chip_erase_delay too short for ATmega324P, 644, 644P, and 1284P

[David Grayson]

URL:
  <http://savannah.nongnu.org/bugs/?28344>

                 Summary: chip_erase_delay too short for ATmega324P, 644,
644P, and 1284P
                 Project: AVR Downloader/UploaDEr
            Submitted by: davidegrayson
            Submitted on: Fri 18 Dec 2009 10:24:29 PM GMT
                Category: None
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: None
                  Status: None
                 Privacy: Public
             Assigned to: None
         Originator Name: David Grayson
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any

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Details:

The chip_erase delay for four AVRs in WinAVR-20090313\bin\avrdude.conf is too
short, so the chip erase command times out and avrdude prints an error
message.  The error is not fatal; it doesn't prevent the user from programming
the chip.  This bug should be very easy to fix.

<h3>Solution:</h3>

In avrdude.conf, change the chip_erase_delays to the following values:
Part         chip_erase_delay
ATmega324P:  45000 (us)
ATmega644:   55000
ATmega644P:  55000
ATmega1284P: 55000

Currently they are all 9000, which is too short.  The values listed above
were taken from the parts description files installed by AVR Studio:
C:\Program Files (x86)\Atmel\AVR Tools\Partdescriptionfiles\*.xml

<h3>Example output reproducing the problem:</h3>

<pre>
C:\>avrdude -P\\.\USBSER000 -pm324p -F -c avrisp2 -e

avrdude: AVR device initialized and ready to accept instructions

Reading | ################################################## | 100% 0.02s

avrdude: Device signature = 0x1e9511
avrdude: Expected signature for ATMEGA324P is 1E 95 08
avrdude: erasing chip
<b>avrdude: stk500v2_command(): unknown status 0x80</b>
avrdude: stk500v2_command(): command failed
avrdude: stk500v2_command(): unknown status 0xc9
avrdude: stk500v2_program_enable(): cannot get connection status

avrdude: safemode: Fuses OK

avrdude done.  Thank you.
</pre>

Fixing the chip_erase_delays will not fix all the error messages here, but it
will fix the one highlighted in bold.




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