On Fri, Jun 10, 2011 at 12:35 AM, Andreas Fritiofson <andreas.fritiof...@gmail.com> wrote: > What are you talking about? Not all ftdi dongles are wired like this => > there is no universal default setting suitable for all dongles.
Uhm, I read bad at 3am :-) You told that not always setting Hi-Z on FT chip equals Hi-Z on JTAG connector.. right? This is obvious and I told that there might be strange buffer design where Hi-Z activates its outputs (not LOW as should). I gave you and example of good design of buffer design allowing FT chip also to work with SWD and possibly any other transport. For this kind of good design there _is_ universal behavior (read more below) :-) Also note what Laurent told: On Tue, Jun 7, 2011 at 9:34 AM, Laurent Gauch <laurent.ga...@amontec.com> wrote: > Without doing something within deinit, we still have strange openocd > inter-session phenomena (as TRST still driven instead to be TRISTATE ... > really important for debugging TI OMAP ! ) Not sure if OUTPUT-HIGH for FT2232 means Hi-Z but most buffers you mention in those interfaces are tri-state buffers from what I have seen on ~5 different devices. Tri-state buffers are active-low, so setting pins to input (Hi-Z) should give Hi-Z on connector in most cases... strange designs may require layout-specific quit function but this is trivial to add :-) -- CeDeROM, SQ7MHZ, http://www.tomek.cedro.info _______________________________________________ Openocd-development mailing list Openocd-development@lists.berlios.de https://lists.berlios.de/mailman/listinfo/openocd-development
