| MrCurious | anyone here have experience with a pandaboard's db9 serial port? | 02:12 |
|---|---|---|
| infinity | MrCurious: In what way? I use it for serial console occasionally and it Just Works... | 02:29 |
| MrCurious | i have a GPS module that puts out a 9600 data stream. i can see a data stream, but it looks like its off somehow. i use screen /dev/ttyO2 9600 which is near identical to how i do it on another machine | 02:35 |
| MrCurious | maybe my serial voltage is wrong (0-5v) | 02:39 |
| prpplague^2 | MrCurious: the db-9 uses rs-232 levels, what does your GPS module use? | 02:54 |
| MrCurious | 5v | 02:55 |
| prpplague^2 | are you sure? got a datatsheet on the device? | 02:56 |
| MrCurious | thats what the datasheet said IIRC | 02:57 |
| MrCurious | but the garbled data has the same general pattern as the data i am expecting, but as if its 6 or 7 bits instead of 8 | 02:58 |
| MrCurious | i connected the GPS to a FTDI board and read from it on my mac with screen /dev/tty.usbblahblah 9600 | 02:59 |
| MrCurious | i suspect my next step will be to write a C program to read from teh serial port where i can control all the speed parity stop bit settings | 02:59 |
| prpplague^2 | MrCurious: if it is indeed +5V TTL then it will not work on the RS-232 DB-9 on the panda | 03:01 |
| MrCurious | the db9 is expecting 0,12v? | 03:02 |
| prpplague^2 | MrCurious: -12 and +12 | 03:03 |
| prpplague^2 | MrCurious: rs-232 | 03:03 |
| MrCurious | i see :( | 03:03 |
| MrCurious | guess i will need to switch to an alternative method | 03:03 |
| MrCurious | suppose this is a good use for my ttl serial to BT boards | 03:03 |
| prpplague^2 | MrCurious: why not just uses a level shifter and use the uart on the expansion header? | 03:04 |
| MrCurious | what voltages is that uart expecting? as this GPS can do either 5v or 3.3v | 03:04 |
| MrCurious | and that would be much better than resorting to learning how to use BT on a panda :P | 03:05 |
| MrCurious | coincidentally, i have some level shifters in route from sparkfun as we speak | 03:05 |
| prpplague^2 | MrCurious: the all I/O on the panda operates at 1.8V | 03:05 |
| MrCurious | ahh, liek a gumstix | 03:05 |
| prpplague^2 | MrCurious: you'll need something like a txs0102 to shift to 3.3v or 5v | 03:06 |
| MrCurious | all i/o, *except for usb... | 03:06 |
| MrCurious | http://www.sparkfun.com/products/8745 | 03:06 |
| MrCurious | or like that... | 03:06 |
| MrCurious | cheap, and made very easy to work with | 03:06 |
| MrCurious | and since the GPS is send only, only one level converter will be needed :) | 03:07 |
| MrCurious | prpplague: thanks for the tip about the expansion header. that will make this much much easier | 03:08 |
| prpplague^2 | prpplague^2: yea if arent into doing the wiring yourself | 03:09 |
| * prpplague^2 has a spool of about 10k txs0102's in the garage | 03:10 | |
| MrCurious | i will wire the things i understand | 03:11 |
| MrCurious | fabricate PCB's for the things i pretend to know | 03:11 |
| MrCurious | and lean on pre-built when its cost effective | 03:11 |
| prpplague^2 | indeed | 03:13 |
| prpplague^2 | MrCurious: http://www.beldynsys.com/quad.htm | 03:13 |
| prpplague^2 | MrCurious: great for prototyping | 03:13 |
| MrCurious | i just want to make an interesting robot. i have discovered while on this journey, starting in the land of ATMEL that there are many rabbit holes one can fall down into | 03:13 |
| prpplague^2 | worthy investment | 03:13 |
| prpplague^2 | MrCurious: indeed | 03:13 |
| prpplague^2 | MrCurious: true with just about any technology field | 03:14 |
| MrCurious | i have some QFN or TQFP accelerometers, gyros and magnetometers i have been meaning to make into a 9dof | 03:14 |
| MrCurious | for prototyping, eagle + dorkbotpdx works better for me than prototyping boards | 03:15 |
| prpplague^2 | hehe, each to his own, i only do a board design if i really expect to need more than a handful | 03:18 |
| MrCurious | starting to get the feeling that OpenNI is Biased against ARM in favor of intel | 03:19 |
| prpplague^2 | openni? | 03:20 |
| MrCurious | http://www.openni.org/ | 03:21 |
| MrCurious | http://www.openni.org/gallyt | 03:21 |
| MrCurious | the videos betray its purpose faster than the words | 03:22 |
| prpplague^2 | ahh interesting | 03:22 |
| MrCurious | i was impressed last night, a pandaboard + usb hard drive + kinect + libfreenect running cvdemo had a usable frame rate | 03:23 |
| MrCurious | running ubuntu 11.04 (known to have 1/2 speed usb) | 03:23 |
| MrCurious | i see why it doesnt work on ARM, it relies on SSE2 and SSE3 instructions | 03:28 |
| ashwinipatankar | I am running a code on arm kernel in qemu, can any one advice me how to calculate the mips for the same, I am having gprof output | 09:28 |
| stm__ | hi all | 09:34 |
| stm__ | during booting procees | 09:34 |
| stm__ | i got the problem mounting none on dev | 09:34 |
| stm__ | iam running ubuntu | 09:35 |
| stm__ | and now i changed uImage | 09:35 |
| stm__ | and updated initramfs | 09:35 |
| stm__ | do i need to edit some other files inorder to mount the dev | 09:36 |
| ashwinipatankar | I am running a code on arm kernel in qemu, can any one advice me how to calculate the mips for the same, I am having gprof output | 09:36 |
| hrw | ashwinipatankar: do not assume anything speed related in qemu | 09:41 |
| ashwinipatankar | hrw: I agree , but how to calculate mips, my code is running, I am having gprof output for the same, even on desktop also (outside qemu) how will I calculate mips | 09:43 |
| hrw | no idea | 09:43 |
| hrw | I do not believe in mips as speed unit | 09:43 |
| hrw | what is faster? armv5 1.2GHz or armv7 0.6MHz? | 09:44 |
| hrw | what is faster? armv5 1.2GHz or armv7 0.6GHz? | 09:44 |
| ashwinipatankar | hrw: MIPS with respect to specific code, so that we can know how many instructions it needs to execute in per second for real time operations | 09:46 |
| persia | hrw, Depends on workload. | 09:50 |
| persia | ashwinipatankar, Map out your codepaths, then see how long it takes to execute your code. Mind you, this won't be very interesting, especially for qemu. | 09:51 |
| === chrisccoulson_ is now known as chrisccoulson | ||
| blu_ | hi all | 11:42 |
| blu_ | can anyone tell me is there any spi driver on 11.04 ubuntu on arm ? | 11:43 |
| stm__ | hi all | 16:09 |
| stm__ | any link to build ubuntu filesystfrom scratchem | 16:10 |
| stm__ | scratch | 16:10 |
| GrueMaster | stm__: See https://wiki.ubuntu.com/ARM/ and read RootFromScratch section. | 16:38 |
| === micahg_ is now known as micahg | ||
| gaeel | hey people, anyone had any luck with lubuntu or similar on a low-end ARM-based sub-netbook? | 16:56 |
| gaeel | My grandmother got one for free, and I'm thinking of installing something that will work for her email and web-browsing needs | 16:57 |
| gaeel | Was considering chromium too, but it seems unstable so far | 16:58 |
| diwic | gaeel, out of curiousity, what model was that arm-based subnetbook? | 17:15 |
| gaeel | It's a Tec T-Book | 17:18 |
| gaeel | Googling it yields little to no info | 17:18 |
| gaeel | I'm thinking it's a generic machine branded by Tec, for distribution as a cheap machine | 17:19 |
| diwic | gaeel, then I assume that Linux has no support for its hardware, but I don't know | 17:19 |
| gaeel | It comes pre-installed with Windows CE and a handful of software | 17:19 |
| gaeel | I want to give it a go for the kicks, it comes with a reset SD card, so I can always nuke it and put it back if I brick it | 17:21 |
| gaeel | I'm mostly pondering which distro to try | 17:21 |
| ogra_ | ubuntu wont support armv5 (which that system likely is) | 17:24 |
| ogra_ | use debian | 17:25 |
| ogra_ | or some other distro that supports v5 | 17:25 |
| gaeel | What I was thinking | 17:25 |
| gaeel | I don't need anything to state-of-the-art, since it's for my grandmother, but was wondering if Ubuntu had anything to offer | 17:26 |
| ogra_ | not for that type of arm anymore | 17:26 |
| gaeel | righto | 17:27 |
| prpplague | FYI, for anyone interested, today is the last day to submit a proposal for ELC-E | 18:22 |
| GrueMaster | ELC-E? | 19:29 |
| rsalveti | GrueMaster: https://blueprints.launchpad.net/linaro-ubuntu/+spec/o-uboot-spl-usb-support-omap4 | 20:12 |
| rsalveti | GrueMaster: hopefully when done u-boot spl will have a similar functionality as omap4boot | 20:12 |
| rsalveti | but all at the same tree :-) | 20:12 |
| rsalveti | and then we can just kill x-loader ;-) | 20:12 |
| rsalveti | thanks to jcrigby | 20:13 |
| GrueMaster | sweet. | 20:30 |
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