**** BEGIN LOGGING AT Mon Dec 10 02:59:57 2007 Dec 10 19:25:25 prpplague: iirc you mentioned the shap lh7axxx once - have you used that processor? Dec 10 20:01:31 drath: indeed, we did a complete design using the LH7a400 Dec 10 20:01:37 drath: as well as the LH79520 Dec 10 20:06:22 prpplague: heh, any chance you remember if it was possible to debug that processor out of reset? i briefly browsed the user's manual and datasheet and found little information on JTAG and the reset lines on that proessor Dec 10 20:07:36 drath: i don't recal, but i do know that the JTAG is NOT ieee compliant Dec 10 20:08:13 ahh, yeah, i remember you and/or beewoolie discussing this Dec 10 20:28:02 drath: sorry boss was at my desk Dec 10 20:28:09 drath: yea, sampling is all wrong Dec 10 20:28:27 drath: plus i do know the nRESET and nTRST had issues Dec 10 20:33:42 prpplague: ok, thx Dec 10 20:34:19 prpplague: an openocd user has a problem with completely bogus flash, and can't read or write any memory, not even internal SRAM Dec 10 20:34:48 prpplague: but without reliable ntrst and nsrst it's difficult to get the processor into a known state Dec 10 20:37:39 indeed Dec 10 20:38:01 drath: basically what we would have to do is hold the reset down while powering on the device Dec 10 20:38:52 drath: one of the problems is that is if the flash is blank, i.e. 0xff is stored in the locations, when the cpu starts it tries to execute 0xff which is considered an invalid op Dec 10 20:39:04 drath: and basically locks the processor Dec 10 20:39:37 drath: unless the board has good control of both nRESET and nTRST you are going to have problems Dec 10 20:39:43 prpplague: yeah - sometimes a jtag debugger is able to connect in these cases, but that's just luck Dec 10 20:40:16 drath: sharp/nxp's recommended fix is to tie both nRESET and nTRST together Dec 10 20:40:17 prpplague: anyway, i'll see what the user replies, maybe he manages to get "reset halt" working Dec 10 20:40:22 drath: indeed just luck Dec 10 20:40:23 prpplague: lol Dec 10 20:40:30 prpplague: that certainly doesn Dec 10 20:40:31 't help Dec 10 20:40:35 indeed Dec 10 20:41:04 which is why i complain about sharp's support of such issues **** ENDING LOGGING AT Tue Dec 11 02:59:57 2007