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Re: Where Is The AVRISP USB Programmer When I Plug It In?



Bob Chiodini wrote:


I get the impression from the /var/log/messages output when I plug the programmer in to the USB port that this driver is already present in the 2.6.18-1.2257.fc5 kernel, and ttyUSB0 is a serial port, isn't it? I'm still not sure how to get avrdude to speak to the programmer. Perhaps the firmware upgrade done to it by AVRStudio will help.

Bob

Bob,

I did some poking on the bdmicro website and there is a later verion of avrdude.

http://download.savannah.gnu.org/releases/avrdude/

You could try talking to the programmer via mincom. Maybe there is a baud rate or handshake issue.

Bob...

I can report a happy ending to the story now. AVRStudio4 did a firmware upgrade to the programmer itself. When I retried avrdude using /dev/ttyUSB0, it worked like magic. Here is the output:

[rlc bobcp4 bbot]$ avrdude -p m128 -P /dev/ttyUSB0 -c stk500
avrdude: stk500_recv(): programmer is not responding
avrdude: successfully opened stk500v2 device -- please use -c stk500v2

avrdude: AVR device initialized and ready to accept instructions

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

avrdude: Device signature = 0x1e9702

avrdude: safemode: Fuses OK

avrdude done.  Thank you.

[rlc bobcp4 bbot]$ avrdude -p m128 -P /dev/ttyUSB0 -c stk500v2

avrdude: AVR device initialized and ready to accept instructions

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

avrdude: Device signature = 0x1e9702

avrdude: safemode: Fuses OK

avrdude done.  Thank you.

--------------------------------------------------------------------------------------

As you can see, avrdude is quite intelligent and will try different programmer devices as needed. I guess it was definitely worthwhile to check the programmer out on Microsoft Windows. There isn't a Linux version of AVRStudio, and I wouldn't have gotten the all-important firmware upgrade without it.


Bob


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