RE: [avrdude-dev] FW: avrdude + avrstudio / stk500 / ATMEGA162 - programming problems

[Steve Bentley]

Morning!!
Success finally!!
 
The SCK is now set at 4.4us, I don’t know why this is 4.4, as I used sck
4 and would have expected 4us however the longer the better I guess.
 
I could not read the fuses using ISP mode as they were always read back
incorrectly therefore I switched to HV and read them again.
 
(using High-Voltage)
The following fuses are read:
*Brown-out detection disabled
*Serial program downloading (SPI) enabled.
*Boot Flash section size=128words Boot start address=$1F80
*Divide clock by 8 internally
*Clock output on PORTB0
*Ext. Crystal Osc. Frequency 0.4-0.9 MHz; Start-up time 258 CK + 4.1ms
 
Getting oscillator parameters.. P=0x01, N=0x00, SD=0x04 .. OK
 
Therefore I cleared the ‘Divide clock by 8 internally’ and set ‘Ext.
Crystal Osc. Frequency 3.0-8.0 MHz; Start-up time 1 CK + 0ms.
 
Then success!! Switching to ISP mode, I could read the (correct)
signature everytime. Programming using avrdude
avrdude -p atmega162 -P com1 -c stk500  -v -v  -U flash:w:test.hex
 
...and the hex file was wri9tten and verified correctly. The program is
now running on the micro!
 
Thanks everyone who helped (especially Galen)!!!
 
Merry Christmas
 
Steve
 
 
 
-----Original Message-----
From: Galen Seitz [mailto:address@hidden 
Sent: Mittwoch, 22. Dezember 2004 23:41
To: Steve Bentley
Cc: 'avrdude-dev'
Subject: Re: [avrdude-dev] FW: avrdude + avrstudio / stk500 / ATMEGA162
- programming problems 
 
Steve Bentley <address@hidden> wrote:
 
> Returning to the ISP issue. I believe Galen is correct with his
> suggestion regarding sck but currently I only receive the following:
> 
> ////
> Avrdude -p atmega162 -c stk500 -t
> 
> avrdude: stk500_program_enable(): failed to enter programming mode
> avrdude: initialization failed, rc=-1
>          Double check connections and try again, or use -F to override
>          this check.
> 
> 
> avrdude done.  Thank you.
> ////
> 
> Not being very familiar with avrdude, I was not sure when and how to
set
> sck. My idea was to set sck in the terminal mode, is this correct?
 
Yes, you need to use terminal mode.  Try adding the -F switch to skip
the device signature check.  avrdude does a signature check which will
likely fail until you slow down SCK.  As an alternative, you could try
to
adjust the SCK speed using avrstudio.
 
galen
 
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