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AVR jtagice clone problem with programming a hex file and reading chip

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hi all,

i have made an avr jtagice clone from this site

http://www.scienceprog.com/build-your-own-avr-jtagice-clone/

i try jtagice with atmega128.
avrstudio is find the jtagice clone and connect it. i can erase atmega128 and read fuse bits. but i can't program a hex file or read chip. avrstudio is giving error message like this,

->entering programming mode..OK
->programming..failed
->leaving programming mode..failed

or

->entering programming mode..OK
->reading..failed
->leaving programming mode..failed

what is the problem?

thanks..
 

Re: avr jtagice problem?

is there anybody to help? :|
 

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