Re: [avrdude-dev] STK500v2 speed problems

[David A. Lyons]

Someone seems to have had exactly the same problem in January:
        
<http://www.avrfreaks.net/index.php?name=PNphpBB2&file=viewtopic&p=785679>

I found that by Googling "SCK period : 276.7 us" (since that looked way too 
high).

The answer "johjoh" found was:
        Fixed it! Seems like the "SCK period" parameter had been
        set to 276.7 us, which is what caused the slowness. Running
        avrdude with -B 1 solved the problem, and automatically saved
        this parameter as well

Cheers,

--Dave

On Mar 18, 2011, at 3:49 PM, Klaus Rudolph wrote:

> Hi all,
> 
> I today program a at90s8515 a few times and need around 40 sec to write
> and 10 sec to verify. After a few programmings I now need 250 sec. Why?
> 
> 
> I use:
> avrdude -p 8515  -c stk500v2 -P /dev/ttyS0 -e -v -U flash:w:cservo8.srec
> 
> avrdude: Version 5.6cvs, compiled on Jan 14 2009 at 11:11:38
>         Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/
> 
>         System wide configuration file is "/opt/linux//etc/avrdude.conf"
>         User configuration file is "/home/zfrdh/.avrduderc"
>         User configuration file does not exist or is not a regular
> file, skipping
> 
>         Using Port                    : /dev/ttyS0
>         Using Programmer              : stk500v2
>         AVR Part                      : AT90S8515
>         Chip Erase delay              : 20000 us
>         PAGEL                         : P00
>         BS2                           : P00
>         RESET disposition             : dedicated
>         RETRY pulse                   : SCK
>         serial program mode           : yes
>         parallel program mode         : yes
>         Timeout                       : 200
>         StabDelay                     : 100
>         CmdexeDelay                   : 25
>         SyncLoops                     : 32
>         ByteDelay                     : 0
>         PollIndex                     : 3
>         PollValue                     : 0x53
>         Memory Detail                 :
> 
>                                  Block Poll               Page
>              Polled
>           Memory Type Mode Delay Size  Indx Paged  Size   Size #Pages
> MinW  MaxW   ReadBack
>           ----------- ---- ----- ----- ---- ------ ------ ---- ------
> ----- ----- ---------
>           eeprom         4    12   128    0 no        512    0      0
> 4000  9000 0x80 0x7f
>           flash          4    12   128    0 no       8192    0      0
> 4000  9000 0x7f 0x7f
>           signature      0     0     0    0 no          3    0      0
>   0     0 0x00 0x00
>           fuse           0     0     0    0 no          1    0      0
>   0     0 0x00 0x00
>           lock           0     0     0    0 no          1    0      0
> 9000  9000 0x00 0x00
> 
>         Programmer Type : STK500V2
>         Description     : Atmel STK500 Version 2.x firmware
>         Programmer Model: STK500
>         Hardware Version: 2
>         Firmware Version Master : 2.01
>         Topcard         : Unknown
>         Vtarget         : 5.1 V
>         SCK period      : 276.7 us
>         Varef           : 5.0 V
>         Oscillator      : 3.686 MHz
> 
> 
> What I am doing wrong? What can I change to get old timings?
> I am a bit confused about that problem. Is there a problem with the
> device, parameters inside the stk500? Some corrupted init files?
> 
> Thanks!
> Klaus
> 
> 
> 
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