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| 07:56.18 | keesj | prpplague: do you know if the flyswatter 2 is supported by Code composer studio? |
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| 12:36.30 | prpplague | keesj: not supported |
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| 12:55.26 | keesj | prpplague: thanks. it's not like the bone schematics are really different is it? |
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| 14:22.41 | prpplague | keesj: there are some differences in how the pins are mapped for the controls |
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| 14:43.33 | landley | I don't want to go on the cart. |
| 14:53.05 | Posterdati | hi |
| 14:53.23 | Posterdati | please I need help on cortex-m3: I'm developing a small RTOS, using SysTick as tick exception. The SysTick ISR is executed only once, what I did wrong? Thanks for help |
| 14:55.21 | landley | Posterdati: http://embeddedfreak.wordpress.com/2009/08/10/cortex-m3-systick-peripheral/ |
| 14:55.33 | Posterdati | thanks |
| 14:55.44 | landley | http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.dui0552a/Bhccjgga.html |
| 14:55.57 | landley | Timer counts to zero. Looks like you have to reset it for it to go off again. |
| 14:56.25 | landley | Ah, RELOAD value is taken from SYST_RVR |
| 14:58.02 | Posterdati | I don't need to reload it |
| 14:58.16 | Posterdati | do I? |
| 15:08.37 | landley | Dunno. Check it in your ISR? |
| 15:08.48 | landley | Maybe you need to reset the enable bit? |
| 15:09.01 | landley | I haven't played with this hardware... |
| 15:16.40 | Posterdati | examples about SysTick IRQ don't set anything, just configure the SysTick once |
| 15:17.55 | Posterdati | maybe status register got corrupted during task switch |
| 15:30.08 | landley | The #2 computer on the most recent supercomputer list is based on Sparc64. Ok, I should do a 64-bit sparc system image. |
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| 17:04.58 | prpplague | wmat: wheeeeee - https://lwn.net/Articles/515569/ |
| 17:19.34 | wmat | prpplague: awesome! |
| 17:26.44 | landley | I should really update my lwn subscription... |
| 17:30.10 | mnemoc | landley: http://lwn.net/SubscriberLink/515569/5205a559c0ba0f17/ .... but yes :) |
| 17:35.55 | landley | prpplague: I wonder what would be involved in making an oscilloscope out of a raspberry pi? |
| 17:36.27 | prpplague | landley: pretty easy in fact |
| 17:37.09 | landley | Ah, microphone port. (I was wondering where you'd get the ADC.) |
| 17:39.22 | prpplague | landley: there are other options to use some fast adcs via spi as well |
| 17:40.24 | landley | It's very interesting, but unfortunately I'm sittign in my cubicle. |
| 17:40.34 | landley | I've reached the point where sitting in my cubicle physically hurts. |
| 17:40.41 | landley | And I'm just about completely paralyzed while here. |
| 17:40.47 | landley | Psychosomatic, I know. |
| 17:41.42 | landley | The actual _work_ is trivial. The work environment is... thingy. |
| 17:41.53 | landley | Anyway, remind me to think about this when I'm not here. I can't really think right now. |
| 17:41.58 | landley | Too busy trying not to scream. |
| 17:42.35 | prpplague | hehe |
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| 18:11.04 | dalias | microphone port probably doesn't have enough bw for most oscilloscope uses |
| 18:11.38 | dalias | back in the day, bt848/878 vid cap cards could be turned into decent dirt-cheap oscilloscopes |
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| 18:14.17 | prpplague | dalias: for most of the small hobby stuff the microphone ports for most android devices has enough |
| 18:14.40 | prpplague | dalias: in fact many of the credit card swipe modules for cell phones simply is the microphone adc to do the sampling |
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| 18:18.15 | dalias | prpplague, :) |
| 18:18.39 | dalias | yes, when i think oscilloscope tho i think of analyzing signals in the mhz+ ranges |
| 18:18.54 | dalias | not just hz/khz ranges |
| 18:19.15 | prpplague | dalias: indeed, however for most of the applications that i referenced 1MHz or less is acceptable |
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| 18:27.24 | keesj | as logic analyzer for usually 20Mhz is enough (for debugging SPI and other stuff) and when things get more serious it's better to take the hardware to work :P |
| 18:28.48 | keesj | http://www.saleae.com/logic16?gclid=CKHU17-Xs7ICFaTKtAodVDoAPQ is pretty good for home fun |
| 18:29.10 | keesj | (and has Linux support) |
| 18:30.54 | boru | +1 |
| 18:31.00 | boru | Those analysers are great. |
| 18:32.21 | keesj | isn't http://sdr.osmocom.org/trac/wiki/rtl-sdr type hardware going to provide decent home scopes for anaolog signals? |
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| 19:52.50 | SpeedEvil | <PROTECTED> |
| 19:53.36 | SpeedEvil | that is to a scope what an drill press is to an anvil |
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| 20:47.27 | kergoth | prpplague: nice seeing the lwn article about your talk :) cool stuff |
| 21:22.08 | prpplague | kergoth: thanks bud! it was totally unexpected.... |
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