| Textmode | whitequark: plural of cluebat, a bludgeoning weapon who's blows supposedly imbue the target with a clue...similar in concept to a clue-by-four | 02:11 |
|---|---|---|
| mth | related topics: lart | 02:30 |
| Textmode | mth: :3 | 02:51 |
| wpwrak | phew. server/firewall resurrected. after 3 hours of fighting :-( | 04:58 |
| wolfspra1l | wow | 06:05 |
| qi-bot | The build was successful: http://fidelio.qi-hardware.com/~xiangfu/build-nanonote/openwrt-xburst.full_system-20120509-0421 | 10:08 |
| whitequark | I discovered an interesting thingy | 16:04 |
| whitequark | USB Charging Specification | 16:04 |
| whitequark | and there's something called ACA | 16:05 |
| whitequark | accessory charging adapter | 16:05 |
| whitequark | basically if you have an otg host and want to power a peripheral and charge the host simultaneously, there's an ID pin value for that | 16:05 |
| whitequark | (full ACA requires two FETs, four resistors and a small uC, but that's only required to handle two connected OTG devices) | 16:06 |
| whitequark | so I just hardwired everything for a case of OTG Host -- Regular Peripheral | 16:06 |
| whitequark | I wonder why no one ever manufactures ACAs | 16:06 |
| whitequark | seriously, it's an incredibly valuable thing to have--for example, an OTG host alone most certainly cannot power a hard disk | 16:07 |
| whitequark | or an external CDMA modem (I tried) | 16:07 |
| whitequark | and there's not even a single page on some site last updated in 2008 widh design from 1998 | 16:08 |
| whitequark | weird | 16:08 |
| wpwrak | sounds like a standard that has only been implemented on one platform: | 16:09 |
| wpwrak | on powerpoint :) | 16:09 |
| whitequark | I have yet to patch PMIC driver in my OTG host, through. it doesn't support this mode out of the box | 16:09 |
| whitequark | presumably because there's no adapters at all | 16:10 |
| whitequark | yeah | 16:10 |
| whitequark | but it's really cool and useful | 16:10 |
| wpwrak | perhaps it would be :) | 16:10 |
| whitequark | when I understood what I want, I was quite sure there's a standard for it | 16:10 |
| whitequark | now I just hope that FET layout in that PMIC will allow me to configure it to not short-circuit OTG charge pump to external charger | 16:11 |
| whitequark | like it tries to do now | 16:11 |
| whitequark | surprisingly, OTG pump wins | 16:11 |
| whitequark | and external charger painfully squeaks | 16:12 |
| wpwrak | there's a "standard" for almost everything :) | 16:12 |
| whitequark | (it was an accident. some moron made an USB cable with ground being without insulation and ID pin in a black insulation. of course I fucking mixed up these wires.) | 16:12 |
| whitequark | I regularly meet with USB cables manufactured by morons | 16:13 |
| whitequark | previous one had D+ and D- switched | 16:13 |
| whitequark | that is, D+ was white and D- was green | 16:13 |
| whitequark | took me a day of debugging to determine why my device won't enumerate. yuck. | 16:13 |
| whitequark | now I want to kill. | 16:14 |
| wpwrak | as long D+/D- are matched end-to-end .. :) | 16:15 |
| whitequark | they were in the cable. | 16:15 |
| whitequark | but I cut it in halves and connected the end with A plug to my device. | 16:16 |
| whitequark | I somewhat expect that once I'll encounter a cable where ground will be red and vbus will be, I dunno, green | 16:16 |
| wpwrak | black ? :) | 16:17 |
| whitequark | and then something expensive will explode miraculously | 16:17 |
| whitequark | it's funnier with green | 16:17 |
| wpwrak | that's what you get for tampering with carefully engineered equipment | 16:17 |
| whitequark | clamp diodes explode better | 16:17 |
| whitequark | "carefully engineered equipment" oh, you reminded me of a phrase I once seen in a manual | 16:18 |
| wpwrak | rule #67345: never trust a cable's colors at face value. always measure :) | 16:18 |
| whitequark | >Your device is a product of superior design and craftsmanship and should be treated with care. | 16:18 |
| wpwrak | translation: "keep your dirty fingers away" | 16:18 |
| whitequark | I especially like the part about "superior design" | 16:18 |
| whitequark | makes me think of nazis or something like that. | 16:19 |
| whitequark | looks like nokia first made the phrase and then everyone else copied it | 16:19 |
| whitequark | I seen it in docs for some EXCEPTIONALLY CRAPPY wireless modules | 16:19 |
| whitequark | and by "exceptionally" I mean that they can compete with PICs in crappiness | 16:20 |
| whitequark | i.e. adding them to your device will yield a net negative result. | 16:20 |
| LunaVorax | Hello everyone! | 20:34 |
| whitequark | I never thought one could screw up in so many places in a simple USB connector | 21:02 |
| whitequark | 1) wrong colors | 21:02 |
| whitequark | 2) wire too thin for a hard drive to spin up | 21:02 |
| whitequark | 3) loose contacts | 21:02 |
| whitequark | 4) what else?.. | 21:02 |
| viric | unconnected shield | 21:07 |
| GNUtoo-desktop | whitequark, I'll try to order a new usb connector for my nexus S( serial cable broke some time ago) from sparkfun(so it's rock solid, breakout board) | 21:12 |
| GNUtoo-desktop | I'll do it tomorrow | 21:12 |
| GNUtoo-desktop | the previous one broke.... | 21:12 |
| viric | is sparkfun related to the unconnected shield? | 21:26 |
| whitequark | viric: unconnected shield is required by spec on the peripheral side | 21:30 |
| whitequark | to avoid parasitic currents via groundloop | 21:30 |
| whitequark | that is, on host side it is connected and on peripheral side it isn't. | 21:30 |
| viric | ah nice | 21:32 |
| DocScrutinizer | haha, that's fun, for OTG | 23:08 |
| --- Fri May 11 2012 | 00:00 | |
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