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| 00:43.29 | joe_bleau | Anyone up on MIPS SoC hacking? |
| 00:48.10 | ds2 | what else uses them besides the wrt54's? |
| 00:52.30 | joe_bleau | I picked up one of the Trendnets that was free after rebate. |
| 00:52.55 | joe_bleau | It's using the atheros ar2317 cpu. Looks like 2MB flash + 8MB sdram. |
| 00:53.06 | joe_bleau | 2x6 pin unpopulated header |
| 00:53.10 | ds2 | thought that was an arm core? |
| 00:53.14 | joe_bleau | MIPS |
| 00:53.19 | ds2 | think that's also used in a DLink unit |
| 00:53.47 | joe_bleau | Wonder if the same firmware would work. I suspect they've all just copied the Atheros reference design. |
| 00:53.50 | ds2 | i got a ``dead'' dlink unit from someone |
| 00:54.06 | ds2 | there might be a page on the seattlewireless site |
| 00:54.07 | joe_bleau | I don't see any obvious serial lines. |
| 00:54.57 | ds2 | http://www.atheros.com/pt/AR5007AP-G.htm |
| 00:55.09 | ds2 | the dlink board looks almost identical to the picture |
| 00:56.10 | joe_bleau | This one looks like it's mirror imaged, with a few more bypass caps. |
| 00:57.01 | joe_bleau | Wait, I see three tiny vias that could be the UART. |
| 00:57.13 | ds2 | it might be tight on memory |
| 00:57.14 | joe_bleau | Nope, ground. |
| 00:57.25 | joe_bleau | Flash is serial, too! |
| 00:57.32 | ds2 | you think it is running linux already? |
| 00:57.50 | joe_bleau | Haven't even powered it up. |
| 00:58.25 | joe_bleau | How would I know? I've never jtag'd a MIPS core before. |
| 00:58.56 | ds2 | third party references from other people or prehaps the presense of a source tarball on the mfg site =) |
| 00:59.01 | joe_bleau | Found some test points...maybe there is a UART brought out. |
| 01:00.53 | ds2 | openwince jtag supposely supports it |
| 01:01.17 | ds2 | http://wiki.openwrt.org/AtherosPort |
| 01:01.30 | joe_bleau | Yeah, that page is a little hard for me to read... |
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| 01:11.30 | joe_bleau | I see a firmware download, but no source. |
| 01:12.02 | joe_bleau | I also found a reference to the TEW-432BRP running the Marvell chipset. Must have two designs floating around. |
| 01:12.27 | ds2 | or maybe one is a cost reduced design? |
| 01:13.05 | joe_bleau | Yeah, this appears to have twice the flash of the Marvell unit. |
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| 13:10.54 | *** topic/#edev is a channel for the discussion of hacking small consumer electronic devices, mostly ARM based |
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| 14:36.54 | chouimat|ibook | morning |
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| 17:36.13 | jbevren | random trivia |
| 17:36.18 | jbevren | There are typically about 220 strings in a full-sized piano, which may have a combined tension of about 20 tonnes. Tuning involves making minute adjustments to the tensions of these strings, in order to properly align the intervals between their tones. |
| 17:36.21 | jbevren | 20 tons! |
| 17:36.26 | jbevren | (/trivia) |
| 17:36.51 | jbevren | to think the cast iron harp in those things is holding back that much tension :) |
| 17:38.39 | GPSFan | jbevren: ane each time you adjust one string, it effects all the others, most of the time in a small way, but over the whole piano, it makes piano tuneing an art. |
| 17:38.48 | jbevren | I know :) |
| 17:38.52 | jbevren | I tuned my mother's piano |
| 17:38.55 | jbevren | by ear |
| 17:39.00 | jbevren | it came out so beautiful :) |
| 17:39.14 | jbevren | took me three weeks to be satisfied with the tuning |
| 17:39.20 | jbevren | tok me two days to get it close |
| 17:39.26 | jbevren | it wa shorrible when she got it |
| 17:39.41 | GPSFan | ;>) |
| 17:39.41 | jbevren | I ended up very close to a werkmeister tempermant |
| 17:40.20 | jbevren | some of my friends that play piano actually preferred to play mom's rather than theirs heh |
| 17:40.35 | jbevren | it sounded 'better' :P |
| 17:40.42 | GPSFan | you have a new career as a piano tuner... |
| 17:40.49 | jbevren | I could well be |
| 17:41.23 | jbevren | I still have a tuning hammer (I never figured out why its called a hammer) |
| 17:41.56 | jbevren | the only thing that sucked is that i used A400 to not overstress the harp :P |
| 17:43.23 | jbevren | heh |
| 17:43.26 | jbevren | anyone can learn how to 'type' |
| 17:43.32 | jbevren | thats what playing is |
| 17:43.44 | jbevren | (imho) :) |
| 17:43.58 | jbevren | not everyone however can learn to perform(sp?) |
| 17:44.20 | GPSFan | I can sort of touch type, many typos, same on the piano ;P |
| 17:46.31 | jbevren | I can play well, but can't read music :X |
| 18:18.01 | joe_bleau | Odd. I had all the piano tuning books at the library checked out last month. |
| 18:18.19 | joe_bleau | My mom is looking for a small grand, so we were doing some research. |
| 18:19.06 | joe_bleau | I wouldn't dare attempt to tune one, so I'm very impressed that you were able to! |
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| 18:37.25 | pina | hi |
| 18:38.43 | pina | I'm playing with the Parallax Propeller at the moment.. 8 cores of 20Mips each.. 32kb of shared ram.. 32 io pins.. first time I've played with true multiprocessing.. |
| 18:38.48 | pina | anyone worked on one of those? |
| 18:43.01 | jbevren | woah this guy has balls :) |
| 18:43.07 | jbevren | http://www.swinkels.tvtom.pl/swinsid/final2pop.png |
| 18:43.12 | jbevren | hooking an MCU directly to a CPU bus :) |
| 18:43.21 | pina | jees for a second i thought it was me |
| 18:43.21 | pina | :D |
| 18:43.32 | jbevren | haha |
| 18:43.39 | jbevren | btw how do you like the prop? |
| 18:43.47 | jbevren | I looked at the arch, and it seems real interesting |
| 18:44.31 | pina | the link? |
| 18:44.33 | pina | which arch |
| 18:47.45 | jbevren | Propeller's arch |
| 18:47.46 | davidc__ | the prop arch |
| 18:47.53 | davidc__ | has the price come down any? |
| 18:47.59 | jbevren | Whats the price like? |
| 18:48.07 | davidc__ | first time I looked at it it was 20 and decided I could get an fpga for that price ;) |
| 18:48.12 | jbevren | I just got a hammer so I need to work on that first hehe |
| 18:48.29 | jbevren | davidc__: I still struggle with PLDs |
| 18:48.32 | jbevren | meh :) |
| 18:48.32 | davidc__ | ooh, you have one? prp says he's sending our demo beginning of october ;) |
| 18:48.38 | jbevren | I get frustrated and take a looong break |
| 18:48.43 | jbevren | davidc__: I do |
| 18:48.47 | jbevren | I havent done much with it |
| 18:48.51 | jbevren | but its size and speed are impressive |
| 18:49.05 | davidc__ | jbevren: ah.. I love FPGA's now.. was really frustrating to start with, but now I can do things I can't dream of with MCU's |
| 18:49.21 | jbevren | I did do one successful thing with it (that wasnt just blinking LEDs) :) |
| 18:49.32 | jbevren | I made a sync generator for my mac SE's internal CRT |
| 18:49.36 | pina | jbevren: pretty darn good propeller's |
| 18:49.43 | davidc__ | cool.. my latest work is doing LCD video generation |
| 18:49.48 | jbevren | the long run process is to make a 1bpp framebuffer ;-) |
| 18:50.01 | jbevren | I only need a 2mhz ram clock for that and 28k ram |
| 18:50.02 | jbevren | lol |
| 18:50.14 | davidc__ | you have 28k ram onboard any decent fpga |
| 18:50.19 | davidc__ | all my current stuff for lcd gen is all non-fb |
| 18:50.28 | jbevren | the 9572 isnt big enough for all the space I need for the counters, etc |
| 18:50.31 | davidc__ | all generate on the fly [as I haven't got my boards /w huge SDRAM on em back] |
| 18:50.35 | pina | this parallax is not a mips designs is it |
| 18:50.39 | jbevren | so I'll have to convince my bigger FPGA to work |
| 18:50.45 | davidc__ | jbevren: which big FPGA? |
| 18:50.48 | jbevren | um |
| 18:50.50 | pina | jbevren: played with propeller? |
| 18:50.53 | jbevren | the spartanIII starter kit |
| 18:51.02 | jbevren | wtf is on that thing (boggle) its been ages |
| 18:51.13 | jbevren | its 250kgates |
| 18:51.40 | jbevren | should be plenty large ;-) |
| 18:51.49 | jbevren | my only challenge is that I want ot use the framebuffer with an old 5v system |
| 18:52.10 | jbevren | anyway, I need to do a grocery store run |
| 18:52.15 | jbevren | ciao :) |
| 18:52.23 | davidc__ | jbevren: thats got enough blockrams for the FB |
| 18:53.57 | pina | jbevren: whats the arch for the propeller? |
| 18:54.53 | davidc__ | pina: its a custom core |
| 18:56.40 | pina | you worked on it davidc__? |
| 18:56.47 | davidc__ | pina: nope |
| 18:56.53 | davidc__ | thats just what I heard :P |
| 18:57.09 | davidc__ | I've never used a prop core.. when I first looked at em, they were too expensive for my taste |
| 18:57.11 | pina | jbevren: that link you posted That's a SID connected to an ATMega.. not much different than a C64 hookup.. but it is a *SID* so it has the ultimate coolness factor |
| 18:59.07 | pina | right?? |
| 18:59.24 | davidc__ | thats what it looked like to me |
| 18:59.33 | pina | SID right |
| 18:59.53 | pina | much like a C64 hookup |
| 19:01.17 | pina | Oh, cooler than cool.. it's an ATMega pretending to be a SID.. excellent stuff indeed |
| 19:02.13 | davidc__ | ah.. neato. Dunno how the atmega would be at synthesizing realtime thoug |
| 19:02.24 | pina | is that what it is? |
| 19:03.22 | davidc__ | ? |
| 19:03.43 | pina | No idea |
| 19:03.45 | pina | jbevren:? |
| 19:03.59 | davidc__ | well, thats what the page says it is |
| 19:04.03 | davidc__ | plugin module for synthesis |
| 19:06.35 | davidc__ | wow- his sound sample is definitely impressive |
| 19:06.42 | joe_bleau | Yeah, it makes more sense if you back up a level: http://www.swinkels.tvtom.pl/swinsid/ |
| 19:07.53 | davidc__ | yea.. thats what I'm lookin at |
| 19:08.05 | davidc__ | its not a dropin though, requires special SW |
| 19:08.22 | davidc__ | and I dunno.. the sound sounds too perfect :P |
| 19:10.01 | pina | goddamn polish bastards and their brains |
| 19:11.23 | davidc__ | I'm just jealous because it sounds better than my arm synth running at 3 times the speed :P |
| 19:12.02 | pina | hah |
| 19:12.17 | joe_bleau | What technique does your arm synth use? |
| 19:12.43 | davidc__ | eh, its something I hacked together in an afternoon to play the tetris theme |
| 19:12.51 | davidc__ | some of its modules use wavetables |
| 19:13.12 | davidc__ | some use direct procedural synthesis [for easy things like triangle /square] |
| 19:13.28 | davidc__ | then theres an ADSR layer |
| 19:14.23 | joe_bleau | Any filtering to simulate the old subtractive synths? |
| 19:16.30 | pina | later |
| 19:16.36 | joe_bleau | I remember when the DX7 came out. Its sound had a pretty influential effect on the music of the time. |
| 19:16.56 | davidc__ | joe_bleau: nah - it was purely an afternoons hacking |
| 19:17.15 | davidc__ | it also had an internal sequencer.. was just to play the tetris theme + sfx |
| 19:17.35 | joe_bleau | Damn, that's pretty impressive for an afternoon hack. |
| 19:18.00 | davidc__ | not really, was under 500 loc |
| 19:18.29 | davidc__ | just an array of timing constants + times to continue playing that note |
| 19:18.38 | davidc__ | wavetable synthesis is easy |
| 19:18.44 | davidc__ | esp if you do no interpolation |
| 19:18.48 | davidc__ | adsr is easy. |
| 19:19.18 | joe_bleau | Back when I was on a just-intonation kick, I played around with some additive code generating wave files. |
| 19:19.40 | joe_bleau | Probably would have been better off just learning c-sound instead. |
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