| 00:15.11 | CcSsNET | o that image |
| 00:15.13 | CcSsNET | O:-) |
| 00:15.16 | CcSsNET | ive been lazy |
| 00:15.56 | CcSsNET | ill get around to it, probably make it graphically enchanced with a design or something too |
| 00:41.08 | prpplague | Crofton|work: you see the pictures i posted on g+ ? |
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| 00:54.50 | Crofton|work | prpplague, yeah |
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| 01:44.43 | prpplague | Crofton|work: hehe |
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| 02:26.14 | scanlime | prpplague: *wave* |
| 02:26.23 | scanlime | hmm, lots of familiar faces here :) |
| 02:26.58 | prpplague | scanlime: indeed |
| 02:27.16 | prpplague | scanlime: was browsing your kiwi images ealier |
| 02:27.18 | prpplague | earlier |
| 02:27.25 | scanlime | oh haha. That old thing :) |
| 02:27.37 | prpplague | scanlime: still a great project |
| 02:27.57 | prpplague | was thinking about submitting it to hackaday |
| 02:28.06 | scanlime | oh haha |
| 02:28.29 | prpplague | scanlime: cosmic and sorphine show up occasionally |
| 02:28.49 | prpplague | scanlime: work on a startup eh? |
| 02:29.07 | scanlime | yep, just had my first week there |
| 02:29.25 | scanlime | Sifteo |
| 02:29.54 | prpplague | scanlime: ahh i'll have to keep an eye out |
| 02:30.08 | scanlime | well, they already have a public web site :) |
| 02:30.09 | scanlime | https://www.sifteo.com/ |
| 02:30.15 | prpplague | scanlime: i've been contracting with TI for special OMAP4 and OMAP5 projects such as the pandaboard |
| 02:30.21 | prpplague | looks |
| 02:30.23 | scanlime | they're still very small, but they've had a limited beta release out for a while |
| 02:31.07 | prpplague | oh interesting |
| 02:31.10 | prpplague | oled displays? |
| 02:31.26 | scanlime | those are LCDs |
| 02:31.53 | prpplague | ahh |
| 02:31.59 | prpplague | scanlime: hackable? |
| 02:32.08 | prpplague | scanlime: i can see those working as swarmbots |
| 02:32.11 | scanlime | hehe |
| 02:32.20 | scanlime | well, there is an SDK in the works for developing games |
| 02:32.56 | prpplague | ahh interesting |
| 02:33.03 | scanlime | can't say anything about future plans, which includes my current project |
| 02:33.09 | prpplague | ahh |
| 02:33.14 | prpplague | understand all too well |
| 02:33.26 | prpplague | scanlime: attending any conferences in the near future? |
| 02:33.35 | scanlime | probably not |
| 02:33.45 | scanlime | had a busy enough life these days.... |
| 02:34.01 | prpplague | understood |
| 02:34.30 | scanlime | this weekend has been a healthy mix of unpacking and watching Breaking Bad :) |
| 02:36.17 | prpplague | scanlime: hehe |
| 02:37.06 | prpplague | scanlime: well i'm off to watch true blood, be sure and add #edev to your autojoin, be nice to have you around |
| 02:37.53 | scanlime | thanks :) enjoy! |
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| 02:50.55 | RushPL | guys, is there some option for GCC that would allow me to have 32-bit data bus accesses on my 16-bit EBI on cortex-m3? 32-bit access generates exception so I thought it would be nice if the compiler could do all 32-bit accesses by two 16-bit ones. |
| 02:52.37 | ag4ve | RushPL: depends on what you're compiling for. if you compile for thumb2, you're running 16 bit. if you compile for straight arm, you've got 32 bits |
| 02:52.57 | ag4ve | thumb2 code is ~30% smaller but slower |
| 02:52.59 | RushPL | I am compiling for thumb2 |
| 02:53.35 | RushPL | since cortex-m3 has only thumb2 |
| 02:54.03 | ag4ve | try something like this: http://www.ethernut.de/en/documents/cross-toolchain-osx.html |
| 02:54.11 | ag4ve | no, the m3 will do both |
| 02:54.15 | RushPL | but I am not sure I was understood :-) I have a certain memory space that does not allow me to have 32-bit data access |
| 02:54.50 | ag4ve | ah, so compile your gcc for thumb2 and do that |
| 02:55.30 | ag4ve | i don't know about the linker, but if you do asm, check this: http://pygmy.utoh.org/riscy/cortex/led-lpc17xx.html |
| 02:55.48 | RushPL | is -mthumb != thumb2 ? |
| 02:56.35 | ag4ve | no idea. should be. don't think there's two versions of thumb |
| 02:56.54 | ag4ve | or, rather, not two versions in production |
| 02:56.57 | RushPL | I am still confused about what you mean since cortex-m3 is a 32-bit uC |
| 02:57.30 | roxfan | ag4ve: thumb2 has nothing to do with memory width |
| 02:57.34 | RushPL | so it operates mostly on 32-bit word |
| 02:57.35 | RushPL | s |
| 02:57.49 | roxfan | the registes and memory space is still 32-bit |
| 02:57.49 | ag4ve | the thumb2 subset is a 16 bit instruction set for arm chips |
| 02:58.12 | RushPL | (and besides most of my program has normal memory access) |
| 02:58.19 | ag4ve | roxfan: so why is the code smaller? |
| 02:58.20 | roxfan | it's actually mixed 16/32 bit, and it is only the instruction size |
| 02:58.32 | ag4ve | oh, right |
| 02:58.40 | roxfan | smaller instructions don't means smaller registers |
| 02:59.44 | ag4ve | RushPL: just remember, if you don't need small code, i don't see any reason to run thumb2 and all the reason to use straight arm code |
| 02:59.48 | RushPL | so to rephrease my problem. 64-bit access is done by two 32-bit accesses. I want the same for 32-bit accesses to be done by two 16-bit ones |
| 03:00.10 | RushPL | ag4ve: I need small code since some of my projects need to fit in 16KBs :) |
| 03:00.25 | RushPL | barely fitting with thumb2 |
| 03:00.25 | roxfan | ag4ve: on a cortex-m3 you don't have a choice |
| 03:00.52 | RushPL | (and as I recalled and as roxfan has pointed out I believe thumb2 is not an option) |
| 03:01.01 | RushPL | (but a necessity) |
| 03:01.11 | ag4ve | looking.... |
| 03:04.28 | ag4ve | http://infocenter.arm.com/help/topic/com.arm.doc.ddi0337e/DDI0337E_cortex_m3_r1p1_trm.pdf |
| 03:04.45 | ag4ve | 1.8 on lists both 16 and 32 bit instructions |
| 03:05.24 | roxfan | once again: the instruction size has nothing to do with memory access width |
| 03:05.25 | ag4ve | i don't think thumb2 is required |
| 03:06.01 | ag4ve | yes, but thumb2 are 16 bit intructions, so...? |
| 03:06.10 | ag4ve | instructions |
| 03:06.37 | roxfan | 16 and 32 |
| 03:06.58 | roxfan | and by no choice i meant it doesn't support "straight arm" |
| 03:07.12 | roxfan | but that's not the issue anyway |
| 03:11.43 | ag4ve | ok, sorta odd that there would be a 32 bit processor that only supports thumb2 instructions since they are supposed to be slower, but.... |
| 03:13.51 | RushPL | not in all applications sheer performance is priority. |
| 03:14.35 | roxfan | there are several 32-bit processors with 16-bit instructions |
| 03:14.39 | RushPL | this uC is from the extremely low power variant |
| 03:14.41 | roxfan | e.g. SuperH |
| 03:16.09 | ag4ve | at any rate, i think that link should help. i haven't tried it yet (you're slightly ahead of me in this aspect). so let me know if it works or if you find something better |
| 03:16.51 | ag4ve | roxfan: what should i look for to see if i'm in the same boat? |
| 03:17.08 | roxfan | hm? |
| 03:17.33 | ag4ve | i'm wondering if my lpc1311 only supports thumb2 since y'all pointed this out |
| 03:17.56 | roxfan | yep it's a cortex-m3 |
| 03:18.23 | ag4ve | so, all cortex-m3's only support the thumb2 subset? |
| 03:18.28 | roxfan | yes |
| 03:18.37 | ag4ve | grrr |
| 03:18.51 | roxfan | there's also cortex-m3 (e.g. lpc11xx), they support only 16-bit thumb |
| 03:19.00 | roxfan | err |
| 03:19.05 | roxfan | cortex-m0 |
| 03:19.35 | ag4ve | oh well. i can't complain too much when i get a processor for $2.50 :) |
| 03:19.57 | roxfan | thumb-2 is not much slower than arm |
| 03:20.14 | ag4ve | roxfan: didn't think they still made them... wasn't looking either since i need their spp support |
| 03:20.15 | roxfan | e.g. most of code in recent iphones is thumb2 |
| 03:20.30 | ag4ve | really? huh |
| 03:20.35 | roxfan | i hear windows on arm will be thumb2-only |
| 03:21.10 | ag4ve | very well, guess i'll get used to thumb2 and call it a day |
| 03:21.34 | ag4ve | since i only need the spp and dac, it shouldn't be too bad |
| 03:22.45 | ag4ve | grrr, just realized, i think my chip only has one dac.... might have to look for an external dac chip :( |
| 03:23.07 | ag4ve | ... or maybe an spi servo controller |
| 03:24.01 | roxfan | you could make a ghetto dac with pwm and a resistor |
| 03:25.05 | ag4ve | any reference? or what should i look for? |
| 03:25.14 | ag4ve | is not sure what you mean |
| 03:26.01 | roxfan | http://www.k9spud.com/traxmod/pwmdac.php |
| 03:28.04 | ag4ve | oh, no kidding. that might work.. i don't even need that much fidelity. cool thanks |
| 03:28.37 | roxfan | http://digital-diy.com/Swordfish-Compiler-Code-Examples/digital-to-analogue-conversion-dac-via-pwm.html |
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| 03:30.42 | ag4ve | ah, so i just send more pulses and it increases the voltage? |
| 03:32.44 | ag4ve | should have thought of this... it's pretty simple electronics |
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| 09:38.20 | kam187osx | any of u guys know anything about BREW or REX? |
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| 14:36.17 | CosmicPenguin | 8:35 MST - used the word "ubiquitous" in an email. Its going to be a good day |
| 14:43.42 | ag4ve | isn't brew dead? ie, does qualcomm still make chips that support it? |
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| 15:30.05 | landley | Your mouse has moved, you must reboot windows for this change to take effect. |
| 15:30.27 | landley | And for no apparent reason, suspend-to-disk does not work under virtualbox, so you must reboot your Linux vm while you're at it. Grrr. |
| 15:30.40 | landley | That's the hard part... |
| 15:32.39 | landley | Why does LinuxCon want $500 to register? |
| 15:32.44 | landley | I mean, really? |
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| 15:35.53 | ag4ve | landley: depends where it is |
| 15:36.07 | ag4ve | most of the perl cons are <$50 |
| 15:36.29 | ag4ve | appsecdc is >$500 |
| 15:36.41 | ag4ve | defcon is >$1k (iirc) |
| 15:37.08 | ag4ve | bh is ~$100, bsides (generally) $0 |
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| 18:45.20 | ebrosius | hi |
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