**** BEGIN LOGGING AT Fri Oct 11 03:00:00 2019
Oct 11 05:34:19 <dorukkarinca> Hey everyone, just wondering if anyone got around turning a public network into a mobile hotspot using BBGW?
Oct 11 07:55:51 <mrpackethead> afternoon folks
Oct 11 07:56:28 <mrpackethead> i'm looking for some advice on options for connecting audio to a beagle bone green
Oct 11 07:58:05 <mrpackethead> I want to make samples, and do Fast Fourier transforms on it, periodically
Oct 11 08:02:54 <tbr> easiest is a usb soundcard. Any I2S should work too, ofc.
Oct 11 08:03:37 <mrpackethead> i think i want to use i2c..
Oct 11 08:04:11 <veremitz> isn't i2c a bit slow?
Oct 11 08:04:19 <mrpackethead> sorry i mean i2s
Oct 11 08:04:22 <mrpackethead> typeo.
Oct 11 08:04:23 <mrpackethead> :-)
Oct 11 08:04:24 <veremitz> :)
Oct 11 08:04:54 <veremitz> yea there's a reasonable choice of i2s chips
Oct 11 08:05:23 <veremitz> haven't had to select any personally yet .. but the rpi expansion boards use them afaik
Oct 11 08:08:09 <mrpackethead> i want to put it in a beehive
Oct 11 08:08:20 <veremitz> eg http://www.ti.com/product/PCM5102A on the phat dac :)
Oct 11 08:09:08 <veremitz> sounds interesting
Oct 11 08:09:35 <mrpackethead> yes, you can characterise bee behavior by the 'hum' its making
Oct 11 08:09:41 <mrpackethead> capture, and then do a FFT
Oct 11 08:09:47 <mrpackethead> get an analysis
Oct 11 08:11:27 <veremitz> neat
Oct 11 08:26:34 <ds2> why not just do PDM?
Oct 11 08:26:48 <ds2> MEMS mic
Oct 11 08:37:01 <mrpackethead> Yes, a MEMs mic is very much my choice
Oct 11 08:39:15 <mrpackethead> ds2, i'm not stuck on any particular tech. I'd just really like to be able to connect to the mic 'digitally'
Oct 11 08:39:30 <mrpackethead> and avoid any analog sections
Oct 11 08:40:29 <ds2> mrpackethead: yes, PDM is digital
Oct 11 08:40:37 <ds2> 1 wire, native output of the mic
Oct 11 08:40:54 <mrpackethead> how easily does the beagle connect to that
Oct 11 08:41:19 <ds2> it is a 1 bit digital output but at like 2MHz so you process it down to something useful like 16bit @ 44Khz
Oct 11 08:41:29 <ds2> the PRU should handle it
Oct 11 08:41:49 <mrpackethead> i probalby odnt' need to go to 44k either
Oct 11 08:42:11 <ds2> you can run it at a slower clock too
Oct 11 08:42:30 <ds2> it comes down to - you can trade sample rate for number of bits
Oct 11 08:42:41 <mrpackethead> i'm not sure how much range i nee yet toally
Oct 11 08:42:47 * msh2 delurks. https://github.com/mkj/pru-mic/blob/master/pru/asmpr0.asm is reading 8 mems mics
Oct 11 08:43:09 <msh2> all the bits to uaerspace
Oct 11 08:43:16 <msh2> userspace
Oct 11 08:44:02 <ds2> what would be cool is if someone wrote the ALSA glue for a PRU based DAI
Oct 11 08:45:17 <mrpackethead> i'm not sure i need 8 mics
Oct 11 08:45:53 <mrpackethead> but that model would work nicely
Oct 11 08:46:06 <ds2> you can beam form to locate the mic and cut out noise
Oct 11 08:46:07 <ds2> :D
Oct 11 08:48:51 <Humpelstilzchen> odas in hw would be nice..
Oct 11 08:50:20 <mrpackethead> beehive is a bit of a tricky thing to 'record'
Oct 11 08:50:31 <mrpackethead> ‪ coming from everwhere
Oct 11 08:50:40 <mrpackethead> lots of 'baffles' all through it
Oct 11 10:04:48 <zmatt> what an amazing electronic padlock... https://youtu.be/uVvEkcN5tW8
Oct 11 12:12:40 <Malav> hello
Oct 11 12:14:22 <Malav> i update boot/uEnv.txt in AI than it is not startted
Oct 11 12:15:04 <Malav> now i have install new image and write in sd card
Oct 11 12:15:15 <Malav> but it is not flash again in BB AI
Oct 11 12:16:53 <Humpelstilzchen> you flash a new image because you broke your uEnv.txt?
Oct 11 12:17:41 <Malav> i was try but its not flashing
Oct 11 12:18:05 <Malav> i attached micro sd card and start power but nothing happen
Oct 11 12:29:32 <zmatt> Malav: did you change it to be a flasher?
Oct 11 12:29:43 <zmatt> by default the sd card image will just run from sd card, it won't reflash eMMC
Oct 11 12:30:16 <zmatt> see last paragraph of step 0 of https://beagleboard.org/getting-started
Oct 11 15:10:06 <Marius> Hi,
Oct 11 15:10:14 <Marius> using pwm as non user.
Oct 11 15:10:50 <Marius> echo 1 > export does not trigger any udev event, then how to change the root:root owhership of the new pwm sys file ?
Oct 11 15:12:47 <Marius> the echo 1 > /gpio/export(unexport) triggers
Oct 11 15:13:17 <Marius> but echo 1 > /pwm/pwmchip#/export does not
Oct 11 15:13:50 <veremitz> sounds like a weird permissions issue
Oct 11 15:14:13 <veremitz> might need some udev voodoo, or some other setup config
Oct 11 15:17:56 <kremlin> m
Oct 11 15:46:22 <zmatt> Marex: there's definitely a udev event
Oct 11 15:46:28 <zmatt> and there are udev rules by default that set permissions
Oct 11 15:46:37 <zmatt> also, in the default configuration, they're exported automatically
Oct 11 15:46:50 <zmatt> (when cape-universal is enabled, which is true by default)
Oct 11 15:47:04 <zmatt> oh I meant Marius: not Marex: but he left already
Oct 11 15:47:24 <zmatt> oh wait never mind, I thought gpio, not pwm
Oct 11 15:48:52 <zmatt> doesn't matter, same applies to wpm
Oct 11 15:48:54 <zmatt> *pwm
Oct 11 15:50:31 <zmatt> they're exported automatically (by default udev rules), udev events do happen on export, and group and permissions are set (by default udev rules)
Oct 11 15:58:22 <zmatt> only problem with the default udev rules is that the convenience symlinks are not removed when unexporting, but there's really no reason to unexport anyway so that's kinda irrelevant... other than that it all works fine => https://pastebin.com/q0aEcT9s
Oct 11 15:58:49 <zmatt> so problem exists between keyboad and chair :P
Oct 11 16:01:49 <veremitz> imagine .. :p :D
**** ENDING LOGGING AT Sat Oct 12 02:59:57 2019