| 03:42.39 | *** join/#openjtag vmaster_ (i=vmaster@p549B3BCF.dip.t-dialin.net) |
| 05:43.11 | *** join/#openjtag ka6sox (n=ka6sox@nslu2-linux/ka6sox) |
| 07:46.07 | *** join/#openjtag ep1220 (n=NN@gate.epatec.at) |
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| 08:43.58 | *** join/#openjtag ep1220 (n=NN@gate.epatec.at) |
| 11:27.51 | *** join/#openjtag ka6sox (n=ka6sox@nslu2-linux/ka6sox) |
| 11:46.46 | *** join/#openjtag [g2] (n=g2@nslu2-linux/g2) |
| 12:41.01 | *** join/#openjtag prpplague (n=billybob@72.22.136.211) |
| 13:30.18 | prpplague | anyone here have experience loading apps into ram via jtag to an arm device? |
| 13:46.01 | vmaster_ | yes |
| 13:46.45 | ka6sox | beewoolie does |
| 13:47.22 | [g2] | ep1220 has into the mini I cache |
| 13:48.03 | prpplague | any tips/tricks i need to know about? |
| 13:48.04 | [g2] | we were talking about loading a small program and setting up the memory controller and serial as bootstrap |
| 13:48.21 | vmaster | prpplague: what arm? |
| 13:48.22 | ep1220 | mini cache is XScale specific |
| 13:48.33 | prpplague | vmaster: arm7tdmi core |
| 13:48.47 | prpplague | vmaster: s3c44b0x to be exact |
| 13:48.49 | vmaster | openocd.berlios.de - read my thesis, i hope it explains everything necessary |
| 13:49.01 | prpplague | vmaster: oh lovely, thanks |
| 13:49.05 | prpplague | vmaster: |
| 13:49.17 | prpplague | vmaster: docs are always helpful :) |
| 13:49.28 | vmaster | the code from july works for arm7 and arm9, but i only tested it on at91rm9200 and hynix hms307202 |
| 13:50.05 | vmaster | i gotta go - cya |
| 13:50.10 | prpplague | vmaster: ok thanks |
| 13:51.16 | prpplague | [g2]: yea thats what we are talking about |
| 13:52.08 | prpplague | [g2]: i want to setup something similiar Haret |
| 13:55.02 | prpplague | [g2]: just not wince specific |
| 13:58.40 | [g2] | it's a common thing to want to do |
| 13:58.51 | [g2] | manufacturing turn up |
| 14:03.33 | prpplague | [g2]: well this is a little different from what i would normally do |
| 14:03.44 | prpplague | [g2]: normally i would just load the flash with a bootloader |
| 14:04.03 | prpplague | [g2]: in this case i want to load directly to ram and execute from there |
| 14:04.06 | [g2] | bootloader or test sw, same deal really |
| 14:04.24 | prpplague | [g2]: yea, without the interupt vectors though |
| 14:04.56 | prpplague | [g2]: yea i figured it was pretty common deal, just hadn't done it before |
| 14:04.58 | [g2] | there's nothing wrong with polled sw, it's been run for years |
| 14:05.16 | [g2] | :) |
| 14:06.17 | prpplague | [g2]: i'm looking ot write something with small serial cli that i can peek/poke adresses and do some mem location dumps |
| 14:06.33 | prpplague | [g2]: i probably could use most of the code from some small bootloader |
| 14:08.18 | [g2] | prpplague, we should consider a protocol (serial first) that dumps information out |
| 14:08.41 | [g2] | VxWorks VisionICE iirc had a hw descriptor file thingy |
| 14:09.00 | [g2] | I've been wanting to setup something similar for IXP4XX |
| 14:09.29 | [g2] | connect, get state, have a GUI display _everything_ |
| 14:09.44 | [g2] | and then have it update able |
| 14:15.22 | prpplague | [g2]: hmm, i was just thinking more like small cli terminal that could be accessed via minicom or hyperterminal |
| 14:16.14 | prpplague | [g2]: but a good serial protocol would work as well, just would need some sort of client to handle the data |
| 14:16.24 | [g2] | prpplague exactly |
| 14:16.34 | [g2] | and some tools to generate it |
| 14:16.53 | prpplague | hmm |
| 14:17.03 | [g2] | possibly a DB where ppl could copy part info |
| 14:20.12 | [g2] | bbl |
| 14:21.31 | prpplague | [g2]: yea, later |
| 16:06.49 | *** join/#openjtag bullet (n=bullet@173.61.77.83.cust.bluewin.ch) |
| 16:08.07 | [g2] | ep1220 ping |
| 16:08.14 | [g2] | bullet welcome |
| 16:08.20 | bullet | hi :) |
| 16:08.39 | [g2] | ep1220 is the guy that did the JTAG to the mini I cache and is building the hw |
| 16:08.49 | bullet | k |
| 16:09.23 | [g2] | ep1220 How long do you think it'd take to JTAG the entire I cache ? |
| 16:09.55 | [g2] | bullet I think a small version of APEX will fit into the I cache, we |
| 16:10.08 | [g2] | would just need to init memory and the serial |
| 16:10.14 | [g2] | and could run from RAM |
| 16:12.41 | bullet | ui, I cache is only 32kb. nice |
| 16:34.08 | vmaster | uhm, you can't use the icache like normal ram, afaik |
| 16:34.31 | vmaster | it's used only for instruction fetches |
| 16:50.05 | ep1220 | [g2]: I think You can get 2 or 3MByte/sec to the i-chache |
| 16:50.31 | ep1220 | but as it is only 32K even 32KB/sec woudl fill it within a second :-) |
| 16:51.22 | ep1220 | sorry meant 2 or 3MBit/sec |
| 16:55.29 | bullet | ep1220: your ftdi-jtag project looks very nice |
| 16:56.33 | bullet | what about the software for using it? |
| 17:10.06 | ep1220 | bullet: ibb in 2 hours |
| 17:29.28 | [g2] | ep1220, thx. |
| 17:30.25 | [g2] | Right so downloading a mini bootloader and then possiblly dl'ing an image could be pretty quick |
| 18:15.01 | *** join/#openjtag ka6sox (n=ka6sox@nslu2-linux/ka6sox) |
| 18:25.29 | *** join/#openjtag dot (n=ka6sox@netblock-66-159-209-52.dslextreme.com) |
| 19:07.09 | ep1220 | back now |
| 19:10.48 | bullet | so, how's the status on your project? |
| 19:11.53 | ep1220 | I have a prototype and core-SW to talk to the FTDI on Win and Linux |
| 19:12.27 | ep1220 | plus Sw to use this core to acess the XScale JTAG debug registers |
| 19:12.29 | bullet | and the software is quite hardware specific, right? |
| 19:13.05 | ep1220 | it is for the FTDI2232C |
| 19:13.19 | ep1220 | or you mean target hardware ? |
| 19:13.24 | bullet | i mean, target hardware, yes |
| 19:13.52 | ep1220 | the core is entirely target independent |
| 19:14.16 | ep1220 | the XSCALE part only works on a XSCALE CPU of course. |
| 19:14.41 | ep1220 | So far I did not write bootloaders,FLASH programmers, .. |
| 19:16.36 | bullet | i'm actually new to this stuff, so i don't really know, what jtag can do. for me at the moment, writing the flash of nslu2 would be the primary target, so... |
| 19:17.57 | ep1220 | JTAG can do this. |
| 19:18.10 | bullet | that at least i knew already :) |
| 19:18.13 | ep1220 | there are 2 ways: |
| 19:18.43 | ep1220 | 1) You use the scan-chain. This is the way jtagtools work. |
| 19:18.58 | ep1220 | Need explanation of "scan-chain" ? |
| 19:19.07 | bullet | i'll look it up |
| 19:19.32 | ep1220 | good. Disadvantage: you have to move a lot of bits, so it is slow |
| 19:19.50 | ep1220 | Advantage: it is "realtive" independent of the used CPU. |
| 19:20.14 | ep1220 | You just need to tell the soft the position of the address,data and some control lines. |
| 19:20.30 | ep1220 | 2) You use the CPU to prog the Flash |
| 19:20.57 | ep1220 | here you have to write Flash programming software for (in your case) the Xscale. |
| 19:21.13 | bullet | and this software would run "on" the xscale itself? |
| 19:21.16 | ep1220 | You have no bootloader or operating system at this point. |
| 19:21.33 | ep1220 | Yes, it would be copied into the Xscale I-cache. |
| 19:22.06 | ep1220 | it then can read data from JTAG or any other interface for which you include a driver |
| 19:22.31 | ep1220 | JTAG is the least work (just poll a ready bit and do a read) |
| 19:23.41 | bullet | hmm, and the scan-chain method, does it work with your software already? |
| 19:23.49 | ep1220 | no |
| 19:24.17 | bullet | so, you actually don't use it at all for flash-programming yet? |
| 19:24.20 | ep1220 | yes |
| 19:25.10 | ep1220 | my primary interest is debugging. |
| 19:25.37 | ep1220 | Do you want to flash just once ? |
| 19:25.52 | vmaster | ep1220: your jtag core software - do you queue the scan commands? or do you send them whenever they're needed? |
| 19:25.59 | bullet | no, well. it would be for development. so, i don't know yet :) |
| 19:26.37 | bullet | i might assemble one of those primitive parallel port thingies, would suffice for me, i think. |
| 19:26.58 | bullet | at least, for now |
| 19:27.00 | ep1220 | unless You plan to develop a bootloader, this is likely the case. |
| 19:27.21 | [g2] | ep1220, boards ready yet ? |
| 19:27.25 | ep1220 | i heard it takes 40 minutes to flash redboot with such a device |
| 19:27.40 | bullet | yeah, heard something like that too :( |
| 19:27.54 | ep1220 | [g2]: no, still discussing features with ka6sox |
| 19:28.04 | ep1220 | vmaster: the commands are queued |
| 19:28.22 | vmaster | is that software available somewhere? |
| 19:28.29 | [g2] | ep1220 how do I get a 14 and 20 pin proto for Xscale ? |
| 19:28.30 | [g2] | :) |
| 19:28.55 | ep1220 | [g2]: we plan to make adapters for several JTAG IFs. |
| 19:28.58 | bullet | ep1220: are you planing on selling assembled boards? |
| 19:30.15 | ep1220 | [g2]: one of these will be ARM 20pin to ARM14pin. |
| 19:31.20 | ep1220 | bullet: At first we plan to make a few boards, they use thru-hole technology except for 2 smd (SO-16) |
| 19:32.12 | ep1220 | bullet: i might solder a few for people planing to help write software ;-) |
| 19:32.33 | bullet | hehe |
| 19:32.52 | ep1220 | only after there is usefull software it makes sense to think of a production run |
| 19:33.07 | bullet | yeah |
| 19:34.54 | vmaster | if you're interested have a look at this: http://www.fh-augsburg.de/~hhoegl/proj/volksmikro/usb-jtag/050910/ - the new version of the board my professor designed - he's using galvanically isolated level shifters to fulfill some obscure requirement he has for another project |
| 19:35.00 | bullet | at least you seem to be just a few kilometers away ;) |
| 19:36.10 | ep1220 | I see, You live in our western neighbour |
| 19:36.38 | bullet | :) |
| 19:38.03 | bullet | vmaster: but other than that, it's quite the same, eh? |
| 19:38.05 | ep1220 | vmaster: Thx. So far my SW is on no public server |
| 19:40.54 | vmaster | it doesn't use the dlp2232m anymore, as that's quite expensive, at least from the distributors he queried |
| 19:51.13 | ep1220 | vmaster: Do You have SMD finepitch soldering equipment at the university ? |
| 19:52.35 | vmaster | i think so - he's having the ee department solder the stuff for us |