I'm trying to get this working on my ATTiny4313 and having no luck with putting it into debug mode. I can set fuses, read signature and fuse state, set it to 1/8 clock and back, but whenever I try to engage the debugger, it says the speed is 4294967295 bps (FFFF FFFF) and times out. Looking at the source code and watching the reset signal with a scope makes it look like it should be doing something, but at this point I'm out of my depth.
If anyone has experience with doing this that would be great!
Low: 44, High: 9F, Extd: FF - CHDIV8 Enabled, DWEN Enabled Cycling Vcc Speed: 4294967295 bps Sending BREAK: Timeout: received: 0 expected: 1