**** BEGIN LOGGING AT Fri Apr 16 03:00:02 2010
Apr 16 14:56:52 <atlas> hey all
Apr 16 14:58:22 <atlas> i'm looking for a tool that will allow me to connect jtag to a Renesas mcu.
Apr 16 14:58:36 <atlas> any idea where i might find a relatively inexpensive tool to do so?
Apr 16 16:02:35 <ali_as> What MCU?
Apr 16 16:16:21 <atlas> ali_as: h8s/2148b
Apr 16 16:23:31 <ali_as> By connect to JTAG do you mean debug?
Apr 16 16:24:13 <ali_as> Or just read/write flash?
Apr 16 16:24:54 <ali_as> (external flash).
Apr 16 16:34:19 <ali_as> If you have a boundary scan file for the chip urjtag may be of use along with any compatable interface.  For debug I don't know, you may be stuck with renasas tools.
Apr 16 19:09:03 <atlas> ali_as: thank you.  i'm primarily interested in reading flash
Apr 16 19:12:57 <atlas> ali_as: what kind of hardware does urjtag require?
Apr 16 19:15:47 <atlas> ali_as: nm.  i already have a flyswatter and supported olimex pod
Apr 16 19:16:46 <atlas> now to see if it allows me to play with this mcu
Apr 16 19:26:27 <atlas> ali_as: what makes you suggest urjtag?
Apr 16 19:27:26 <atlas> if the renesas is anything like arm, it requires accessing the mcu through mcu instructions and then reading off results off the data bus.
Apr 16 19:29:26 <atlas> that would require an understanding of the instruction register size, the available scan chains, how to interact with the mcu, and an understanding of the timing of instructions to know when to inject/pull-off the data
Apr 16 19:30:34 <atlas> it looks like a cool tool, but not much different from openocd which i already use.
Apr 16 19:32:35 <atlas> but if you know something about urjtag that would lend itself to this i'm very interested
Apr 16 19:33:34 <ali_as> urjtag is one of the few ones I know that can do boundary scan.
Apr 16 19:35:46 <ali_as> MIPS uses a similar method for debug.  SH4 I don't know about, the only Renasas chip I've looked at was SH4 and we didn't use JTAG.
**** ENDING LOGGING AT Sat Apr 17 02:59:56 2010