**** BEGIN LOGGING AT Sun May 27 03:00:03 2018
May 27 04:17:23 <rar_rar> zmatt: Yes would use FFT. Any recommendations as far as hardware? I'm comfortable with the software - just new to the hardware platform.
May 27 04:19:58 <zmatt> you haven't really explained what kind of signal you're trying to capture (electrically speaking)
May 27 04:20:19 <zmatt> if you can get it to the 0-1.8v range then you can use the integrated adc of the beaglebone
May 27 04:21:21 <zmatt> (the blue also has some 3.3v-safe analog inputs, but those simply use a voltage divider to scale the inputs down to 1.8v)
May 27 04:21:31 <zmatt> or wait I'm confusing the blue with the pocketbone
May 27 04:26:45 <lopta> There's a BeagleBone Blue?
May 27 04:27:46 <rar_rar> If audio, would be something like a tuning fork or buzzer. If EM, don't know, probably something easy to move quickly (phone, bluetooth, wireless)
May 27 04:27:46 <zmatt> yeah, basically beaglebone + robotics cape .. more or less
May 27 04:28:08 <lopta> Thanks zmatt
May 27 04:28:13 <zmatt> rar_rar: "a tuning fork" is not a specification of an electrical signal :P
May 27 04:28:34 <zmatt> but okay, you can want something like a mic input
May 27 04:28:37 <zmatt> *you want
May 27 04:28:39 <rar_rar> Yes
May 27 04:31:08 <kremlin> eve
May 27 04:31:31 <lopta> I should price up a BeagleBone Green
May 27 04:31:52 <zmatt> lots of options I guess.  you could probably glue a mic to an adc input using an opamp, or connect an audio adc to a mcasp interface, or check to see if you can find an audio CAPE that's actually available, or maybe hook up some usb audio thingy
May 27 04:32:11 <zmatt> lopta: ?
May 27 04:35:59 <lopta> zmatt: I think they're a lot like the BeagleBone Black but with Grove connectors for connecting to sensors and perhaps actuators.
May 27 04:36:10 <lopta> (I/O boards, basically)
May 27 04:37:32 <rar_rar> I found an audio cape called the "Bela Mini" but it's not available yet.
May 27 04:37:52 <lopta> Looks like a BeagleBone Black is US$ 55 from my usual vendor.
May 27 04:38:19 <zmatt> the green is just the black without hdmi (and iirc without separate power connector) and with a few connectors added that just connect to pins already available on the expansion headers
May 27 04:38:36 * lopta nods
May 27 04:38:40 <zmatt> there is nothing about the green that resembles the blue
May 27 04:38:42 <lopta> I forgot that the Black has HDMI
May 27 04:39:05 <lopta> zmatt: Ah no.  I didn't even know the Blue existed until you mentioned it here.
May 27 04:39:17 <zmatt> the blue has stuff like motor drivers and support for a 2-cell li-ion battery pack
May 27 04:39:26 <zmatt> and wifi
May 27 04:41:22 <zmatt> the green is fine as a cheaper BBB if you don't need hdmi and don't mind the lack of power connector or the green's stupidity of replacing the 24 MHz crystal by a spread-spectrum clock generator (a mistake they undid on the green wireless)
May 27 04:41:49 <zmatt> don't get the green wireless, it's a braindead misdesign
May 27 04:42:05 <lopta> This will be my first BeagleAnything
May 27 04:43:14 <lopta> What does it use instead of a barrel connector for DC power?
May 27 04:43:19 <zmatt> usb
May 27 04:43:37 <zmatt> and you can still provide 5V power directly via the P9 expansion header
May 27 04:43:50 <lopta> Full-sized USB B?
May 27 04:43:57 <zmatt> no
May 27 04:44:26 <zmatt> the black has mini-B, I presume the green too.  some of the later models such as the black-wireless have micro-B
May 27 04:44:45 <lopta> Mini B I can do.
May 27 04:50:11 <lopta> Looks like the green uses microUSB.  That'll do, I suppose.
May 27 04:52:21 <zmatt> ah you're right it's micro-B
May 27 05:31:27 <lopta> Looks as though Adafruit have a nice case for the BeagleBone Black.
May 27 05:31:50 <lopta> ...perhaps I'll start off with that and "upgrade" to the green at some point in the future.
May 27 05:32:18 <zmatt> I've never understood the urge to put a bbb in a case
May 27 05:32:37 <zmatt> uhh, the green is a downgrade, not an upgrade
May 27 05:32:49 <zmatt> like I said, the green's redeeming quality is that it's cheaper
May 27 05:32:52 <lopta> That's why I put it in quotes.
May 27 05:33:33 <lopta> When I start bolting stuff onto it I'll buy a board without a case. Just to get Minix up and running I'll probably run it in a case.
May 27 05:33:40 <lopta> (the case is $10)
May 27 05:37:25 <lopta> I have to go.
May 27 15:58:02 <Jeevi> Hey Guys, I'm new to work with beagle, I need to control my #beaglebone black with joystick, Can you suggest me some tricks?
May 27 18:58:04 <suriab> how to protect firmware/software ? I have some application running on BBB. Can someone explain me steps to ensure it to make it hard to duplicate/copy entire image.
May 27 19:01:06 <zmatt> goop the board up in epoxy?
May 27 19:02:49 <zmatt> TI doesn't provide any way to protect data against attackers with physical access on any of their ARM-based SoCs (except for some special high-security models that aren't available for the ordinary plebs)
May 27 19:11:49 <suriab> Can we disable serial console out after uboot kicks in
May 27 19:12:10 <zmatt> sure
May 27 19:12:37 <suriab> any tips on how to do that
May 27 19:12:58 <zmatt> although protecting u-boot access seems more important to me.  access to the linux serial console doesn't give you any access, you still need to log in
May 27 19:14:34 <suriab> yeah so how to disable or may be add a password to access boot. I am okay if password is stored or part of image.
May 27 19:14:55 <suriab> i meant uboot
May 27 19:15:31 <zmatt> you can configure u-boot to require a password to access it commandline.  you'll need to recompile it
May 27 19:18:41 <suriab> okay thanks. So if someone gets access to uboot, can the image just be taken out from flash memory.
May 27 19:21:17 <zmatt> sure
May 27 19:30:34 <suriab> any pointers on how yo update u-boot on board.
**** ENDING LOGGING AT Mon May 28 03:00:03 2018