**** BEGIN LOGGING AT Thu May 24 02:59:58 2012 May 24 08:56:17 hi guys May 24 08:56:20 and gals May 24 08:57:46 g'monring May 24 08:58:44 so which jtag tool do u use May 24 09:11:36 stm32 discovery boards, with swd May 24 09:42:52 is there a benefit in swd compared to jtag? May 24 09:43:51 Weaselweb: u using urJTAG? May 24 09:49:58 Weaselweb: less pins, for starters May 24 09:50:23 but it's not chainable like jtag May 24 09:51:13 how many pins May 24 09:52:38 AFAIK jtag has 4+1optional pins May 24 09:52:53 TDI (Test Data In) May 24 09:52:53 TDO (Test Data Out) May 24 09:52:53 TCK (Test Clock) May 24 09:52:53 TMS (Test Mode Select) May 24 09:52:53 TRST (Test Reset) optional. May 24 09:52:54 wiki says so May 24 09:54:16 wow swd is 2-pins May 24 09:55:23 amazingo May 24 10:04:51 whats the speed May 24 10:04:59 4 Mbytes/sec @ 50 MHz May 24 10:05:02 wow May 24 10:05:09 fast fast May 24 10:05:41 in practice both jtag and swd are more pins, but yes, it _can be fast May 24 10:05:47 May I ask May 24 10:05:56 you may ask anything, this in the interet May 24 10:06:02 how do you detect errors in JTAG? May 24 10:06:10 write, then reread to check? May 24 10:06:21 what sort of errors do you mean? May 24 10:06:26 are you on fire? May 24 10:06:35 is the led on? May 24 10:06:36 data write errors May 24 10:07:16 don't you check accuracy of the data on the flash after write? May 24 10:07:23 if you want to, yes. May 24 10:07:23 or while writing? May 24 10:07:30 but that's optional of course, May 24 10:07:57 how do you do it? May 24 10:08:08 write one byte, check it, then continue to another? May 24 10:08:21 whatever the flash writing tool felt was best May 24 10:08:26 or write all data, then check whole? May 24 10:08:52 both will work, in most cases I would assume the second method to be much faster May 24 10:09:04 hmm May 24 10:09:37 do you use jtag? May 24 10:10:03 whats the speed? May 24 10:10:11 no, like I said earlier May 24 10:10:20 ah only swd May 24 10:10:31 speed of anything has nothing to do with swd or4 jtag, but the tools and software in use. May 24 10:10:36 _and_ the target May 24 10:11:14 it takes 20hrs! to flash 4mb in my system :( May 24 10:11:25 then you're doing it wrong :) May 24 10:11:31 and eats %100 cpu! May 24 10:12:11 its unbuffered poor man cable May 24 10:12:18 see? wrong. May 24 10:12:34 so you use hardware jtag? May 24 10:13:15 bitbanging done on jtag chip? May 24 10:13:37 I've said I don't use jtag a few times now.... May 24 10:22:09 why not May 24 10:22:13 :D May 24 10:22:21 you should use May 24 11:11:20 i mean never used in your life May 24 11:11:21 ? May 24 23:07:12 100% cpu and 512KB/hr is normal for a parallell port wiggler jtag **** ENDING LOGGING AT Fri May 25 02:59:59 2012