| 01:07.57 | *** join/#openjtag ByronT-Away (~byron-por@ByronT.nslu2-linux) |
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| 18:11.51 | *** topic/#openjtag is This is the place to discuss development of Open JTAG tools and Bootloaders |
| 19:23.53 | *** join/#openjtag ep1220 (~NN@gate.epatec.at) |
| 19:28.11 | [g2] | ep1220, welcome :) |
| 19:28.21 | ep1220 | hello |
| 19:28.39 | [g2] | You must have felt me thinking about you :) |
| 19:28.50 | [g2] | I was looking at CAD software :) |
| 19:29.03 | ep1220 | for PCB layout ? |
| 19:29.04 | [g2] | Eagle from CADSoft |
| 19:29.06 | [g2] | nod |
| 19:29.40 | ep1220 | I looked at it some time ago |
| 19:29.58 | [g2] | sparkfun does custom layout for $5 a square inch |
| 19:30.15 | [g2] | but it's got to be 2 layer |
| 19:30.30 | ep1220 | still a good price |
| 19:30.45 | [g2] | they also sell the CP2102 |
| 19:30.56 | ep1220 | what is this |
| 19:30.57 | jacques | used to be $2.50 |
| 19:31.09 | jacques | untilk the abusers |
| 19:31.39 | NAiL | abusers? |
| 19:31.44 | [g2] | http://www.sparkfun.com/shop/index.php?shop=1&cart=299514&cat=1&itemid=404& |
| 19:31.46 | jacques | I think they will still do $2.50 after your first order once you show you can work within the rules |
| 19:31.54 | jacques | read the forums |
| 19:32.38 | [g2] | I think that board would plug right in to the NSLU2 (rx/tx might need to be swapped) |
| 19:33.03 | ep1220 | seems so. |
| 19:33.06 | [g2] | but the part is 3-6 volt compatible |
| 19:33.11 | [g2] | and there's Linux drivers |
| 19:33.20 | *** join/#openjtag ByronT (ByronT@ByronT.nslu2-linux) |
| 19:33.21 | [g2] | plus some eeprom on board |
| 19:34.17 | ep1220 | datasheet says it works 3 to 3.6V |
| 19:35.02 | [g2] | maybe that included the USB side |
| 19:35.31 | ep1220 | say 3-3.6V when self-powered |
| 19:35.37 | [g2] | nod |
| 19:36.04 | ep1220 | so I'd say You can use the NSLU2's 3.3V at the serial connector |
| 19:36.12 | [g2] | exactly |
| 19:36.37 | [g2] | the 4 pins from the header can go straight to the 4 pins on the connector |
| 19:36.53 | NAiL | neat |
| 19:36.58 | [g2] | we really just need a little wire/header and cover |
| 19:37.07 | [g2] | for the serial only app |
| 19:37.23 | [g2] | I think it'd probably be <$10 to make |
| 19:38.38 | ep1220 | Do you have price for the chip ? |
| 19:39.02 | [g2] | $3.50-70 ? in 1500 piece |
| 19:39.35 | [g2] | I think that was on digikey, mouser appeared down |
| 19:40.12 | [g2] | mouser still seems unhappy |
| 19:41.32 | [g2] | Ok... the CP2102 (recommended for new designs) is $4.02 Q100 |
| 19:41.46 | [g2] | http://www.digikey.com/scripts/DkSearch/dksus.dll?Criteria?Ref=193700&Site=US&Cat=31786116 |
| 19:41.48 | ep1220 | if you buy 1500, Sparkfun might go with price, too :-) |
| 19:45.45 | ep1220 | i think 10-11$ for Q100 seems realistic |
| 19:46.26 | ep1220 | for parts+ PCB |
| 19:47.49 | ep1220 | Have You asked SparkFun about a volume discount ? |
| 19:49.44 | ep1220 | It has a larger buffer than the FTDI. this is a + |
| 20:02.32 | [g2] | there are Linux drivers too |
| 20:02.40 | [g2] | but no JTAG :( |
| 20:02.54 | [g2] | and some EEPROM |
| 20:04.12 | ep1220 | For serial the FTDI has a Linux driver in the kernel (2.6 and higher iirc) |
| 20:05.23 | ep1220 | that chip is pretty complete, the FTDI needs a lot more external components |
| 20:05.41 | ep1220 | want to bundle it with your DevKit ? |
| 20:10.18 | [g2] | ep1220, it's an idea |
| 20:11.12 | [g2] | actually, if there was a mini USB connector on it we might be able to stick it inside the box with a tiny mini USB cut out |
| 20:12.39 | NAiL | [g2]: btw, I'm building everything now. I'll probably start doing the dev stuff sometime tonight |
| 20:13.18 | [g2] | NAiL, cool |
| 20:13.52 | [g2] | NAiL, did you mean the FTDI or the Native compile environment |
| 20:16.02 | NAiL | Native |
| 20:16.15 | [g2] | Ok.. just double checking :) |
| 20:21.05 | NAiL | Added a few CP2102's to my shopping list too though ;) |
| 20:40.11 | *** part/#openjtag ep1220 (~NN@gate.epatec.at) |
| 21:26.27 | dyoung-zzzz | [g2] around? |
| 22:03.13 | NAiL | [g2]: What's the shortest bootup-time you've seen on the SLUG? Do you know if it's possible to make it boot a bit faster? |
| 22:03.30 | NAiL | (Before the kernel, that is) |
| 22:58.21 | [g2] | dyoung-zzzz, around ? |
| 22:59.14 | [g2] | NAiL, I think the shortest boot time would be from APEX loading the kernel from a parition and a minimal rootfs |
| 22:59.28 | [g2] | NAiL, I think the shortest boot time would be from APEX loading the kernel from a partition and a minimal rootfs |
| 22:59.58 | NAiL | Didn't notice the typo the first time :P |
| 23:00.00 | [g2] | right now boot the kernel from within the jffs2 partition takes around 38 |
| 23:00.12 | NAiL | with apex? |
| 23:00.16 | [g2] | nod |
| 23:00.51 | [g2] | I'd guess that'd be around 18-23/25 loading straight from a partition |
| 23:00.58 | [g2] | and a tiny rootfs |
| 23:01.05 | NAiL | That much difference? |
| 23:01.46 | NAiL | I see I'll have to be jtag-enabled before setting up the AeroSlugs |
| 23:02.03 | [g2] | well caching the jffs2 node structure and uncompressing the info take awhile compared to a straight read from NOR |
| 23:02.12 | NAiL | ah, yeah, of course |
| 23:02.38 | [g2] | I don't know if APEX enables the i cache |
| 23:03.37 | [g2] | I'd imagine enabling the i cache and getting agressive with the flash timings, and putting a tiny initramfs at the end of the kernel would be the fastest |
| 23:05.08 | NAiL | yeah. I'll need short bootup times on the plane, so I'll try that when we're setting it up |
| 23:05.48 | [g2] | NAiL, you probably won't be using the ethernet will you ? |
| 23:05.57 | [g2] | on the plane that is |
| 23:06.20 | NAiL | I was thinking of using it for heartbeat between slugs, but I could do that some other way. |
| 23:07.06 | [g2] | without the ethernet you could have a module less kernel all built in |
| 23:07.30 | NAiL | aaah.. that'd reduce it even more |
| 23:08.28 | [g2] | especially if you pitched the module loading / dependency scripts |
| 23:09.19 | NAiL | I'll probably rip out everything from the initscripts and do a optimized boot |
| 23:12.50 | NAiL | hmm... There wouldn't be any problem making a "nullmodemcable" for the slugs, would it? |
| 23:13.20 | [g2] | I would'nt think so |
| 23:13.56 | NAiL | Then I could use that for heartbeat. |
| 23:16.04 | NAiL | yay. NOTE: build 200506202156: completed |
| 23:16.51 | NAiL | Starting with packages now. When that finishes I'll try native dev. |
| 23:17.01 | [g2] | cool |
| 23:17.19 | NAiL | Fortunately, I had the foresight to have 512mb swap :P |
| 23:19.21 | [g2] | I run with 186 and 64M ram |
| 23:19.35 | [g2] | I think a 256MB and 32 is the same (but less performance) |
| 23:19.54 | NAiL | Lucky man. I'd like to fatten my slug as well :) |
| 23:21.01 | [g2] | and 16MB flash |
| 23:21.54 | NAiL | Were you considering upgrading many slugs and selling? |
| 23:22.37 | [g2] | yep |
| 23:22.56 | NAiL | Cool. Any timescale? |
| 23:23.17 | [g2] | the 64MB without JTAG verified are ready to go |
| 23:23.43 | [g2] | I've been running about 2 weeks with my 64MB unit very happily |
| 23:23.51 | NAiL | hehe |
| 23:24.39 | [g2] | I've got a loaner board I *really* need to play with before it goes back |
| 23:25.02 | [g2] | 425 dev board with 256MB and 533Mhz I think :0 |
| 23:25.10 | NAiL | oooh, nice |
| 23:25.56 | NAiL | A couple of 128mb and a couple of 64mb slugs would be nice though. |
| 23:26.30 | NAiL | What would the cost be, btw? |
| 23:26.30 | [g2] | nod. |
| 23:26.45 | [g2] | dunno for the 128 |
| 23:27.20 | NAiL | I got an unexpected assignment, so I'll have some "leftovers" to use for stuff like that ;) |
| 23:27.21 | [g2] | for the 64's between $150 and $175 US plus shipping |
| 23:27.42 | NAiL | For two? |
| 23:27.52 | [g2] | heh :) |
| 23:28.07 | [g2] | unfortunately for 1 |
| 23:28.17 | NAiL | That'd actually be really cheap, come to think of it |
| 23:28.35 | NAiL | I bought my first slug for ~$140 |
| 23:28.42 | [g2] | it's not bad |
| 23:28.50 | NAiL | Think I can get one for ~110 now. |
| 23:28.57 | [g2] | US ? |
| 23:28.59 | NAiL | yeah |
| 23:29.07 | [g2] | 80 at newegg |
| 23:29.21 | NAiL | not bad at all |
| 23:29.26 | [g2] | the labor on the memory upgrade is expensive |
| 23:29.32 | [g2] | it's nearly 100 pins |
| 23:29.37 | NAiL | Not surprising |
| 23:29.53 | NAiL | It'd take me ages to do, and I'd probably blow it anyways |
| 23:29.56 | [g2] | taking off the old parts, cleanup, putting on the new ones spot check |
| 23:30.04 | [g2] | you and me both :) |
| 23:30.39 | [g2] | It'll be interesting to see what happens |
| 23:30.55 | NAiL | With 128mb? |
| 23:31.08 | [g2] | even with just the 64Mb units |
| 23:31.57 | NAiL | Well.. I hope 64Mb will be enough for the primary slug in AeroSlug. |
| 23:31.58 | [g2] | it'll be interesting what the volume is |
| 23:32.24 | NAiL | But I think I'll get a 128mb if it works. I'll have a couple of 64mb's anyways |
| 23:35.04 | NAiL | haha |
| 23:35.10 | NAiL | Brilliant idea. |
| 23:35.31 | NAiL | The leds on the slugs will be of no use to me inside the plane |
| 23:35.57 | NAiL | But if I can extend them to the wingtips and such, I'll be able to see if a slug fails in mid-air ;) |
| 23:36.44 | NAiL | (And I can see when the plane has booted on the airstrip ;) |