this is my first post here and i hope to get some help of you guys with this absolutely annoying problem.
I've just bought a JTAGICE3 from Atmel to Debug and Flash my ATmegas.
I installed AVR Studio 6 on a Windows 8 x64 machine (also tried the same on a Windows Vista) - the programmer itself is recognized by AS perfectly but it can't communicate with the mega.
If I try to read the signature or fuses, I get:
- in JTAG mode: "No JTAG devices detected. Debugger command Activate physical failed., ModuleName: TCF (TCF command: Device:startSession failed.)"
- in ISP mode: "Failed to enter programming mode. ispEnterProgMode: Error status received: Got 0xc0, expected 0x00, ModuleName: TCF (TCF command: Device:startSession failed.)"
I tried this with ATmega644, ATmega16 - all with factory settings, so JTAG should be enabled. I also tried several different clock settings (125 kHZ, lower, higher, ..).
Maybe you are familiar with this tricky problem or can help me how to fix this.
Thanks for your efforts.