Rick Altherr wrote: > > On Mar 1, 2009, at 12:08 AM, Dirk Behme wrote: > >> >>>> Additionally, short status update from me: >> ... >>>> And, I wonder why the new version needs ~6 initial TAP_RESET moves >>>> as marked with OMAP3_HACK in patch in attachment. Else, the ID code >>>> won't be detected correctly. I assume that this isn't related to new >>>> tap_get_tms_path(). I vote for a reset issue (?) >>> After TRST, the OMAP3 needs 10 TCK pulses before the JTAG hardware >>> turns on. I'm assuming that the 7 TAP_RESET moves combined with 3 >>> other pulses was just enough to get things turned on. >> >> Ah, yes, I forgot this. Thanks for making me re-read TI's spec ;) >> >> What do you think would be the best way to add this to OpenOCD? >> >> The first and easiest idea is to add something like >> >> #ifdef OMAP3_SUPPORT >> /* Do 10 TCK in RESET state to enable OMAP3 jtag */ >> omap3_init() >> #endif >> >> to jtag_init_inner(). But this is quite hackish. There doesn't seem to >> be an interface to add processor specific pre-init functionality to >> jtag_init_inner() ? >> > > I'm not fond of device-specific code in C. The 'run_test' command > available in TCL should let you run any number of clocks in IDLE today. > We have talked about changing it to add an optional state argument, so > you could do something like 'run_test 10 RESET' and have it do 10 TCK in > RESET.
Ok. Maybe I missed something: Is it possible to use TCL commands like 'run_test' *before* jtag_init_inner() is executed? I'm not sure about in what order what (commands in scripts vs. initialization functions in jtag.c) is executed, yet ;) > Then you can use the reset-init event (exposed in TCL via the > target event hooks) to do that when OpenOCD does a reset. That does mean that we have to add a reset-init event to do run_test 10 to get 10 TCKs before jtag_init_inner() is executed? Thanks Dirk _______________________________________________ Openocd-development mailing list Openocd-development@lists.berlios.de https://lists.berlios.de/mailman/listinfo/openocd-development
