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| 01:39.25 | Dufflepod | In the GNU assembler, you can use .set or = to assign a value to a symbol. But by design it can be changed later on by another .set or =. Is there an assembler directive to 'declare' a constant symbol? |
| 01:39.59 | Dufflepod | I can't find anything in the documentation, but I'd be surprised if there wasn't a way of doing it. |
| 01:46.54 | MonMotha | Dufflepod: most targets will let you use C style #define |
| 01:47.20 | Dufflepod | So you can use a #define in the assembler source? |
| 01:47.23 | MonMotha | Dufflepod: and once defined, attempts to redefine should at least emit a warning (and you can then use -Werror if you like) |
| 01:47.44 | MonMotha | it may be target specific. I know it works on AVR. |
| 01:47.48 | MonMotha | try it |
| 01:47.54 | Dufflepod | I'll give it a go now. Cheers. |
| 01:50.51 | Dufflepod | No joy. Even with -Wall can have multiped #defines on the same symbol. |
| 01:51.04 | Dufflepod | I'm building for an ARM target BTW |
| 02:09.15 | joe_bleau | .equiv ? |
| 02:09.30 | Dufflepod | Let me try it now |
| 02:11.40 | Dufflepod | Yep - that's the one. How the heck did I miss that in the manual! |
| 02:11.42 | Dufflepod | Doh. |
| 02:12.00 | Dufflepod | Thanks for the help. :-) |
| 02:12.02 | joe_bleau | .incbin looks handy--that one is new to me. |
| 02:12.04 | joe_bleau | np. |
| 02:13.34 | Dufflepod | You can do the same as .incbin in a linker script file too. I've used it for including bitmaps, the linker defines a name for the address of the included file which you can reference as an extern in your code. Seriously handy. |
| 02:14.02 | joe_bleau | Yeah, exactly what I had in mind. I've had to do the 'convert to C const array' thing a few times. |
| 02:14.11 | Dufflepod | lol |
| 02:37.11 | MonMotha | it'll let you do multiple #define without so much as a warning? |
| 02:37.16 | MonMotha | that's odd; in C it'll warn you |
| 02:37.34 | MonMotha | and yes, there's .equ, but I was under the impression that was internally the same as .set |
| 02:39.56 | Dufflepod | In my my docs from the GNU tools site it says .set .equ and = are equivalent, so none give a warning on a symbol redefinition. |
| 02:40.43 | MonMotha | Dufflepod: I don't know then |
| 02:41.01 | MonMotha | I guess you could write a quick script to pre-parse the assembly and warn you as part of the build step |
| 02:41.10 | Dufflepod | joe_bleau found the answer a little earlier. Use .equiv |
| 02:42.01 | MonMotha | .equiv isn't .equ? |
| 02:42.12 | MonMotha | and on AVR, it WILL warn if you do multiple #define |
| 02:42.15 | MonMotha | are you calling gas or gcc? |
| 02:42.28 | Dufflepod | Nope - completely different directive |
| 02:42.45 | MonMotha | hum...interesting |
| 02:42.48 | MonMotha | I guess that'll work then |
| 02:42.54 | Dufflepod | It's a pure assembler file - no C involved, the way God intended ;-) |
| 02:42.55 | MonMotha | I thought .equ was just a short form of .equiv |
| 02:43.10 | MonMotha | heh, on AVR it is very popular to call GCC on .S files |
| 02:43.36 | MonMotha | it'll handle the "pure assembly" syntax, but lets you use C header files (for register definitions) and let's you do math in constant expressions |
| 02:44.04 | MonMotha | and I just checked; it WILL warn upon multiple #define of the same symbol (though it's just a warning by default) |
| 02:44.05 | Dufflepod | I guess I could have gone via gcc, but why bother. |
| 02:44.23 | MonMotha | well, I'm not so sure that gcc on ARM will handle "pure assembly" syntax |
| 02:44.59 | MonMotha | I actually am not sure I've ever used pure GNU AS. I use gcc for it on AVR, and I don't use GNU tools on many other archs. On ARM, I've always used C with the inline assembly syntax |
| 02:45.03 | Dufflepod | I tried multiple #defines earlier using GNU assembler 2.16.1 and that didn't warn me. |
| 02:45.25 | Dufflepod | When 'compiling' a .S file, gcc doesn't do the work itself, it launches as as I understand it. |
| 02:45.32 | MonMotha | hum, I am using a substantially newer binutils |
| 02:45.51 | MonMotha | well, on AVR there is a difference between calling avr-gcc and avr-as on a .S file |
| 02:46.20 | MonMotha | avr-gcc will do includes of C header files and lets you do e.g. "ldi r16, F_CPU/8" whereas avr-as will complain that F_CPU/8 (even if F_CPU is a constant) is not constant |
| 02:46.26 | Dufflepod | I did a full build of 2.19.1 yesterday on my linux box but hadn't come across the problem then. I'm using the 2.16.1 on windows under Cygwin. |
| 02:46.56 | Dufflepod | Anyway - works like a dream now. |
| 02:47.00 | MonMotha | I appear to be using the WinAVR patched version of 2.18.0 |
| 02:47.07 | MonMotha | kinda funny to see "WinAVR" on Linux |
| 02:47.12 | Dufflepod | lol |
| 02:47.31 | joe_bleau | Nice to see a well-worded question from time to time. Those are easier to answer... |
| 02:47.31 | MonMotha | I think a lot of AVR developers don't even know that all the tools will run natively on Linux, too |
| 02:47.39 | MonMotha | joe_bleau: indeed |
| 02:48.05 | Dufflepod | :-) |
| 02:48.11 | MonMotha | joe_bleau: since you're here, I'll ask if there have been any further developments on that project? :) |
| 02:48.31 | joe_bleau | Sorta. We're trying to find an LCD to demo so that the customer can decide. |
| 02:48.51 | joe_bleau | I found a "Truly" that's a great fit, but they don't know if they have any samples available. |
| 02:49.01 | MonMotha | joe_bleau: hum. The 9261 development kit from Atmel has a QVGA (but it's 4:3, not widescreen) if you just want one of that res. |
| 02:49.09 | joe_bleau | 6.5", wide QVGA. |
| 02:49.15 | MonMotha | hum, no this is smaller and 4:# |
| 02:49.18 | MonMotha | *4:# |
| 02:49.19 | MonMotha | gah |
| 02:49.21 | joe_bleau | Hmm. |
| 02:49.22 | MonMotha | you know what I mean |
| 02:49.28 | MonMotha | I know a guy who reps DisplayTech |
| 02:49.35 | joe_bleau | Is that the one your old place might still have around? |
| 02:49.38 | MonMotha | they have lots of stuff. I can put you in tough with him. |
| 02:49.44 | joe_bleau | Got my email? |
| 02:49.56 | MonMotha | yeah, I'm guessing FWE still has their 9261 dev board. I can give them a ring or you can email and ask. |
| 02:50.06 | joe_bleau | 6.5" wide is just a *really* nice fit for our enclosure. |
| 02:50.17 | MonMotha | yeah... |
| 02:50.18 | joe_bleau | I'll email him tomorrow then. |
| 02:50.25 | MonMotha | nice to have formfactor fits for demos |
| 02:50.39 | MonMotha | well, I had your email, but I can't find it |
| 02:50.39 | joe_bleau | Most of the 6.5" wides I've seen are analog input for portable DVD players. |
| 02:50.43 | MonMotha | can you PM me? |
| 02:50.47 | joe_bleau | sure. |
| 02:51.34 | joe_bleau | Oh, and I found a 9261 card from China: $50/each. |
| 02:51.44 | MonMotha | whoo, cheap |
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| 02:52.27 | joe_bleau | Yeah, but China, no references yet, and I'm waiting on a schematic. It's nicely loaded down with memory and stuff, though. |
| 02:52.33 | MonMotha | I just saw last night a place in China that's doing 155 sq in PCBs (one design, panelized S&R to the max size) for $100 shipped to the USA |
| 02:53.12 | joe_bleau | We just did qty 5 4 layer boards, 5 day turn, for $300 I think. I thought that was a pretty decent non-promo price. |
| 02:55.06 | joe_bleau | Got a LTM8021 eval board in. Little SMPS module in an LGA package. 500mA output. Cute. |
| 02:55.13 | MonMotha | spiffy |
| 02:55.23 | MonMotha | those little modules are great if you have low volume and short dev cycle requirements |
| 02:55.51 | joe_bleau | Which describes this project exactly. |
| 02:57.22 | MonMotha | I still am fond of the MC3163/NCP3163 |
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| 02:57.33 | MonMotha | up to 3A out if you're careful, and the control loops seem very forgiving |
| 02:58.10 | MonMotha | but yeah, if you're only looking at a few hundred and have quick dev cycle, even those can be a slight hassle |
| 03:02.54 | joe_bleau | Scrapped an old flatbed scanner. Thinking about overdriving the CCFL inverter and seeing if the circuit or tube releases first. |
| 03:03.37 | MonMotha | any reason for doing that? gits and shiggles? |
| 03:05.03 | MonMotha | joe_bleau: hum, my display guy is apparently out of the office until the 23rd. That timeframe OK, or should I call up the other guy I know who reps this stuff, but is out of my region? |
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| 03:06.37 | joe_bleau | That's monday, so no big deal. Got other stuff happening in the mean time. |
| 03:06.55 | joe_bleau | Well, it seems a bit silly to toss a working CCFL circuit in the trash. |
| 03:08.28 | MonMotha | heh, keep it around |
| 03:08.32 | MonMotha | never know what you'll need it for |
| 03:08.56 | MonMotha | I like the people who hook flyback transformers from old TVs up to audio signals. The sparks fly off in time with the music! |
| 03:09.07 | MonMotha | far more entertaining than some smoke |
| 03:09.45 | MonMotha | and if Monday is OK, I'll just let him get back with you on Monday |
| 03:09.53 | MonMotha | I need to touch base with him on a new Atmel product, too |
| 03:10.46 | joe_bleau | Almost sounds like the start of a plasma tweeter |
| 03:11.56 | MonMotha | you can do some pretty amazing stuff with 25kV |
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| 03:55.05 | MonMotha | gah, National Semiconductor's website is unusable without flash |
| 03:55.14 | MonMotha | they clearly aren't keeping the non-flash version of their catalog up to date |
| 03:55.54 | joe_bleau | And that let Bob Pease go |
| 03:56.02 | MonMotha | what? |
| 03:56.04 | MonMotha | oh my |
| 03:56.56 | joe_bleau | Some suspect it was voluntary, and he offered to retire to save a few younger people from the axe |
| 03:56.59 | ds2 | Pease is gone? :( |
| 03:58.50 | MonMotha | That man is a legend |
| 03:59.45 | MonMotha | " National offers a broad range of solutions including low-EMI display link interfaces, LED backlighting drivers, HDMI extenders, MPL for mobile devices, timing controllers, display drivers, CRT drivers & video amplifiers as well as audio & power solutions. Home ->Displays Solutions Display Solutions Home - " |
| 03:59.50 | MonMotha | well, somebody's multi-escaping |
| 04:01.42 | joe_bleau | http://www.edn.com/blog/1700000170/post/1030042103.html |
| 04:03.33 | MonMotha | I wonder if anybody else will pick the guy up |
| 04:03.40 | MonMotha | he's gotta be worth something just for the name |
| 04:03.45 | ds2 | edn.com is a really really EVIL site that should be avoided at all costs |
| 04:05.47 | ds2 | bunch of ad pushers hiding behind so call content |
| 04:07.02 | MonMotha | what website can't be described that way these days? |
| 04:07.19 | ds2 | edn is especially obnoxious with the ad delay thing they impose |
| 04:09.10 | MonMotha | what's great is that for me, they show up blank |
| 04:09.16 | MonMotha | apparently the ads are blocked by adblock |
| 04:09.25 | MonMotha | they do at least give you a "shut the heck up" button |
| 04:09.43 | MonMotha | what I find most annoying is that, due to page load times, the "ad" always comes up AFTER I've started reading things |
| 04:12.22 | MonMotha | joe_bleau: heard back from the guy. He has a 6.5" model. Says pricing is "competitive". He's going to talk to me tomorrow. Would you like to give me your ph. number so I can do a conference call? |
| 04:13.03 | joe_bleau | email is much better for me. I try to disconnect the phone at work. |
| 04:13.06 | MonMotha | I'm sorry "very competitive" |
| 04:13.30 | MonMotha | ok, not a problem. I'll run him through some details of the application then either have him email you or I'll follow up |
| 04:13.47 | joe_bleau | Was looking for 'extremely competitive', but maybe he can sharpen his pencil a bit. |
| 04:13.54 | MonMotha | ok |
| 04:13.59 | MonMotha | we'll see what we can work out |
| 04:14.33 | MonMotha | I think your volume would be considered medium to high by the supplier. They mostly work lower volume stuff. That may mean lack of "extremely competitive", but then your volume may be a push for them. |
| 04:15.30 | joe_bleau | I suspect the sticky bit will be the leadtime on the first few. |
| 04:16.01 | MonMotha | this sounds like a standard product, so samples may be available quickly |
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| 08:12.08 | methril|work | yp |
| 08:12.09 | methril|work | yo |
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| 15:17.37 | CosmicPenguin | Crofton|work: ping |
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| 15:21.55 | T0mW | ho hum |
| 15:45.20 | Dufflepod | pong |
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| 16:43.43 | sjhill | T0mW: Hello |
| 16:45.05 | Dufflepod | Hi |
| 16:51.10 | sjhill | hey CosmicPenguin |
| 16:51.20 | sjhill | kicks Crofton|work |
| 16:54.46 | CosmicPenguin | sjhill: hey - hows business? |
| 16:55.20 | T0mW | sjhill: boring day |
| 16:56.00 | T0mW | too cold to do yard work, too nice out to stay inside. |
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| 17:04.27 | sjhill | CosmicPenguin: i'm pretty busy |
| 17:04.30 | sjhill | CosmicPenguin: how about you? |
| 17:04.41 | kergoth | morning |
| 17:04.47 | sjhill | T0mW: yeah, i'm going to try and put the kids' playset together this afternoon |
| 17:04.52 | sjhill | hey kergoth |
| 17:04.55 | sjhill | kergoth: oversleep? |
| 17:05.07 | kergoth | naw, just ran some errands before work |
| 17:05.16 | kergoth | yawns, not enough caffeine yet |
| 17:05.40 | T0mW | sjhill: waiting for guy to email me for a time to get together to get a bicycle I saw on Craigslist. |
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| 17:05.51 | CosmicPenguin | sjhill: super duper busy |
| 17:05.57 | sjhill | CosmicPenguin: that's good |
| 17:06.05 | CosmicPenguin | I suppose |
| 17:06.11 | T0mW | heh, when times are slow, engineering gets busy. |
| 17:06.48 | sjhill | we just got a $450M contract from the Air Force |
| 17:06.55 | sjhill | so i'm happy |
| 17:07.04 | CosmicPenguin | nice |
| 17:08.21 | T0mW | ooo! |
| 17:09.05 | T0mW | cannot get DoD security as he doesn't know where he was in the 1970s |
| 17:11.10 | sjhill | that's a problem |
| 17:11.32 | davidc__ | I have a relative who has some ultra high clearance |
| 17:11.59 | CosmicPenguin | clearly not high enough if you know about it... :) |
| 17:12.03 | davidc__ | haha |
| 17:12.08 | davidc__ | but high enough that Its hard to repress my urge to tell the DoD to fuck off for questions like "where were you at X time" |
| 17:12.14 | davidc__ | because they ask all relatives like that |
| 17:12.22 | davidc__ | *things |
| 17:12.43 | CosmicPenguin | My closest brush with the DoD is that i've been a reference on two applications |
| 17:13.43 | davidc__ | I've done some work that I now suspect I shoulda been cleared for |
| 17:13.49 | kergoth | i was going to get dod clearance when i was working for CSC, and then General Dynamics, but i left before I had a chance |
| 17:13.58 | davidc__ | Mostly, when things came to me with US navy inventory stickers + stuff like that |
| 17:14.30 | davidc__ | and the guy that contracted it to me shipped it outside the US to me, which I suspect was illegal as hell on his part |
| 17:15.06 | sjhill | davidc__: what'd you say your name was again? |
| 17:15.13 | davidc__ | haha |
| 17:15.26 | davidc__ | Anyhow; It wouldn't be my problem |
| 17:15.35 | davidc__ | I didn't even know who the end contract was for until the parts showed up |
| 17:15.55 | davidc__ | I was just a small fish down a long chain of subcontractors |
| 17:17.03 | davidc__ | I can't see how any of the parts they shipped me would have be actually classified; they were all off the shelf |
| 17:20.39 | davidc__ | anyone seen pprplague around recently btw? |
| 17:21.42 | CosmicPenguin | he is takinga netbreak |
| 17:29.12 | sjhill | we gave him a time-out |
| 17:37.06 | Crofton|work | pong |
| 17:37.11 | Crofton|work | CosmicPenguin, hey |
| 17:42.24 | CosmicPenguin | Crofton|work: Do you know if there is a GCC pre-define for ARM that gives an absolute number for the ARM architecture? |
| 17:42.42 | CosmicPenguin | What I mean is - there a define where I could say #if __arch_blah__ > 6 |
| 17:43.02 | CosmicPenguin | or do you have to concatinate __ARCH_ARM__ defines together? |
| 17:44.51 | Crofton|work | no, but if you find out, I want to know the same thing :) |
| 17:45.19 | CosmicPenguin | heh - okay |
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| 17:55.17 | sjhill | CosmicPenguin: __LINUX_ARM_ARCH__ |
| 17:55.20 | sjhill | Crofton|work: __LINUX_ARM_ARCH__ |
| 17:55.27 | sjhill | that is defined by GCC |
| 17:55.44 | Crofton | sjhill, thanks! |
| 17:55.54 | sjhill | i aim to please |
| 17:57.16 | CosmicPenguin | well, you can do if defined(__arm__) too |
| 17:57.55 | CosmicPenguin | but the question is - if I have some assembly instructions that only showed up in arm6, is there an easy way to say - armv6 and later? |
| 17:58.18 | sjhill | #if __LINUX_ARM_ARCH__ > 7 |
| 17:58.26 | CosmicPenguin | oh, well then |
| 17:58.28 | sjhill | #if __LINUX_ARM_ARCH__ >= 6 |
| 17:58.39 | CosmicPenguin | I stand stupid |
| 17:59.00 | sjhill | nope, sorry, Congress already beat you to that title |
| 17:59.38 | Crofton|work | CosmicPenguin, ldrex? |
| 17:59.59 | sjhill | CosmicPenguin: i wouldn't dare go up against you on any x86 stuff |
| 18:00.09 | CosmicPenguin | Crofton|work: nod |
| 18:00.27 | CosmicPenguin | Like I know x86 that well |
| 18:16.20 | sjhill | has anyone ever built a kernel module that unloads itself? |
| 18:16.49 | sjhill | like let's say i have an ioctl call to the driver that essentially tells the driver to shut itself down and unload itself |
| 18:17.10 | kergoth | hasn't |
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| 18:45.48 | T0mW | sjhill: what is that? Death on demand? |
| 18:46.30 | T0mW | sjhill: couldn't you trigger that externally? |
| 18:46.49 | ds2 | I don't think you can do that directly; the ioctl would mean your module is busy |
| 18:47.20 | T0mW | sjhill: have a process watch the sysfs for a flag from the driver, when the flag occurs, the process requests a rmmod? |
| 18:48.00 | T0mW | wake the process up periodically. |
| 18:48.33 | T0mW | or, have it yeild until it gets output from the driver. |
| 18:49.00 | T0mW | not elegant, but. |
| 18:50.07 | T0mW | not "yield" but "select" |
| 18:51.38 | chouimat|work | http://www.nytimes.com/2009/03/20/business/20aig.html?_r=2 |
| 18:52.33 | adyer | sounds like something that could be done with hotplug and udev/mdev |
| 18:53.57 | T0mW | adyer: egad! |
| 18:54.07 | T0mW | make warding signs against udev |
| 18:55.36 | sjhill | adyer: actually, i think udev can handle what i want to do |
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| 19:34.06 | florian | re |
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