On Tuesday 04 August 2009, David Brownell wrote: > That may require some re-layering. If one layer can be "TAP", > accessing TAPs through JTAG should work ... or depending on > the chip, one of the other three schemes (SWD being one). > There would need to be a command to force one of those modes. > > FT2232 interfaces can for example support both JTAG and SWD. > What does that mean at the driver level?
A couple more points: - It can be useful to send JTAG-to-SWD and SWD-to-JTAG state paths even when not using SWD. For a stronger reset; or with LM3S parts, to help reinit of the whole chip. - If SWD *might* be in use, entry to JTAG TLR state may best be done with fifty or so TCK cycles, SWD-to-JTAG (just in case), then more TCK cycles ... instead of just five TCK cycles. _______________________________________________ Openocd-development mailing list Openocd-development@lists.berlios.de https://lists.berlios.de/mailman/listinfo/openocd-development
