Hi, great, that was it. "-B 10" and it works like a charm 8)
thank you, Bob On 3/3/07, Galen Seitz <[EMAIL PROTECTED]> wrote:
Bob Koutsky wrote: > Hi, > > I'm trying to use avrdude 5.3.1 on Linux (Ubuntu Breezy, avrdude is > compiled from source), avrdragon in isp mode connected via USB. When I > try to program ATMega8, I keep getting this error: > > $ avrdude -c dragon_isp -p m8 -P usb -e > > avrdude: AVR device initialized and ready to accept instructions > > Reading | ################################################## | 100% 0.16s > > avrdude: Device signature = 0xff3f00 > avrdude: Expected signature for ATMEGA8 is 1E 93 07 > Double check chip, or use -F to override this check. > > avrdude done. Thank you. > > The value reported as received device signature keeps changing. > Usually (maybe always), it is composed of various combinations of > bytes 0x00, 0xff, 0x03, 0xc0, 0x3f, suggesting that there's some > pattern in how it is generated. > > I double, maybe even triple checked the wiring and tried two different > avrs. The mega8 defaults to a 1 MHz clock, which means SCLK needs to be <= 250 kHz. I don't have a Dragon board, but it sounds like SCLK is too fast. With the STK500, the SCLK period can be adjusted using avrdude. galen
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