RE: [avr-gcc-list] JTAGICE & WinAVR not emulating

[Brian Cuthie]

Sounds like some weirdness that may be caused by the JTAG pod running
too fast (don't ask how I would know this ;-).

Try using the latest avarice that includes the --jtag-bitrate option.
I've found that slowing things down helps a whole lot.

The jtag-bitrate option is new for avarice, and isn't included in the
one that's part of the WinAVR 091303 release. But I've built one that
runs on Windows that you can download from
http://www.systemix.com/avarice.exe if you need it.

Good luck.

-brian

> -----Original Message-----
> From: address@hidden 
> [mailto:address@hidden On Behalf Of kas
> Sent: Saturday, November 15, 2003 2:02 AM
> To: address@hidden
> Subject: [avr-gcc-list] JTAGICE & WinAVR not emulating
> 
> 
> 
> I have just bought the ATJTAGICE and a AtMega64 chip. I have 
> built a platform for the chip to attach the JTAG. After I 
> have complied my code with WinAVR 20030913 and AVR COFF Beta 
> May 19, 2003 packages and try to do emulation, I find that 
> the emulation is not working well. I cannot do any 
> development at all. The syndromes are as follow... How can I 
> get the JTAGICE and WinAVR to work? I am generating the 
> EXTCOFF file and using Studio 4.07.
> 
> =====================================
> The emulation always jumps into some unknown opcode like 
> below when I stop it.
> 
> 000068AC: FFFF ??? Data or unknown opcode
> 
> Also, I find that the emulation keep repeating itself at the main().
> 
> There are also the warnings below. Dont know it is causing 
> the problem...
> 
> JTAG ICE Warning: Execution stopped on reset vector. Could 
> not get location for program entry function, or no entry 
> function was specified. See the 'Debug' section in JTAG ICE 
> options. JTAG ICE Warning: If this is not an error, this 
> check can be disabled in the 'Debug' section in the JTAG ICE 
> options. Studio will then perform low level singlesteps until 
> a source statement is reached. =====================================
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