**** BEGIN LOGGING AT Wed Aug 02 03:00:01 2017
Aug 02 15:43:16 <nerdboy> moin
Aug 02 15:43:54 <nerdboy> thetransformerr[: i don't see where you documented the lab tests
Aug 02 15:45:13 <pmezydlo> hi all :)
Aug 02 15:48:11 <thetransformerr[> lab tests? I still have to build a interafce with real sensors apart from that
Aug 02 15:48:23 <thetransformerr[> what should I add on github
Aug 02 15:48:26 <thetransformerr[> wiki
Aug 02 15:49:10 <thetransformerr[> and by this week we might be able to create a interface also
Aug 02 15:56:39 <_av500_> 5 min
Aug 02 15:57:40 <nerdboy> whatever you hooked up and tested would be nice to document
Aug 02 15:58:16 <thetransformerr[> okk I would be doing it by tomm
Aug 02 15:58:17 <nerdboy> kinda like the silly graphic i made for the saleae analyzer
Aug 02 15:58:50 <thetransformerr[> that was great  , i would like it then
Aug 02 15:59:22 <ravikp7> hello everyone :)
Aug 02 16:01:01 <maciejjo> hi
Aug 02 16:01:39 <nerdboy> ding
Aug 02 16:01:52 <nerdboy> _av500_: you lost 1 minute somewhere
Aug 02 16:02:07 * nerdboy looks under the sofa cushions
Aug 02 16:02:17 <thetransformerr[> hi
Aug 02 16:02:33 <_av500_> aloo
Aug 02 16:02:39 <_av500_> 1) welcome everybody
Aug 02 16:02:45 <_av500_> do we have students?
Aug 02 16:02:50 <_av500_> mentors?
Aug 02 16:02:54 <_av500_> nerdboys?
Aug 02 16:03:00 <maciejjo> some at least
Aug 02 16:03:57 <pmezydlo> yes, I'm here
Aug 02 16:04:03 <indu> Hi all
Aug 02 16:04:10 <_av500_> 3
Aug 02 16:04:23 <thetransformerr[> 4 actually
Aug 02 16:04:30 <ravikp7> present
Aug 02 16:04:42 <_av500_> 5
Aug 02 16:05:08 <nerdboy> are we short one report?
Aug 02 16:05:17 <nerdboy> *and one student...
Aug 02 16:05:33 <maciejjo> yes, mine, I'm late with report
Aug 02 16:06:01 <maciejjo> I will post it after meeting
Aug 02 16:06:39 <_av500_> and ee ?
Aug 02 16:06:43 <_av500_> ee: ping
Aug 02 16:06:47 <_av500_> I see no report
Aug 02 16:07:09 <_av500_> maciejjo: the report is due tuesday in theory :)
Aug 02 16:07:49 <maciejjo> _av500_: I know, sorry for delay
Aug 02 16:07:57 <nerdboy> who's on first this week?
Aug 02 16:08:00 <_av500_> 5 students, 4 reports
Aug 02 16:08:03 <_av500_> losing coherence :)
Aug 02 16:08:08 <_av500_> 2) reports
Aug 02 16:08:13 <_av500_> as said, they are due tuesday
Aug 02 16:08:20 <_av500_> next year I will make it monday ;)
Aug 02 16:08:41 <_av500_> then in 5 years they will be due a week early.....
Aug 02 16:08:47 <nerdboy> kinda like real weekly status reports
Aug 02 16:09:13 <nerdboy> where we had to foecast friday and turn them in fri morning
Aug 02 16:10:18 <_av500_> ok, so anybody blocked in any way?
Aug 02 16:10:26 <_av500_> maciejjo: ?
Aug 02 16:10:29 <_av500_> ee: ?
Aug 02 16:10:34 <thetransformerr[> nope
Aug 02 16:10:39 <maciejjo> no, I'm ok
Aug 02 16:10:40 <_av500_> we are nearing the end
Aug 02 16:10:43 <ravikp7> no, fine here
Aug 02 16:10:48 <_av500_> so please shout if you need anyting
Aug 02 16:10:55 <pmezydlo> no, it's fine
Aug 02 16:11:01 <nerdboy> yup, time flies like an arrow
Aug 02 16:11:17 <nerdboy> *fruit flies like a banana...
Aug 02 16:11:34 <indu> no blockers
Aug 02 16:11:53 * nerdboy checks off old pun for the day
Aug 02 16:11:56 * jkridner will only be around a few minutes again, unfortunately
Aug 02 16:12:12 <_av500_> ok, so 5 students here present and unblocked
Aug 02 16:12:38 <_av500_> so I guess we can move on
Aug 02 16:12:48 <_av500_> ah, sorry forgot
Aug 02 16:12:58 <_av500_> congrats everybody for making round two
Aug 02 16:13:00 <_av500_> !
Aug 02 16:13:13 <ravikp7> thanks :)
Aug 02 16:13:13 <maciejjo> thanks :)
Aug 02 16:13:20 <indu> thanks
Aug 02 16:13:21 <thetransformerr[> thnks!!
Aug 02 16:13:21 <pmezydlo> thanks mentors
Aug 02 16:13:43 * jkridner apologizes to all for my inattentiveness. :(
Aug 02 16:14:37 <_av500_> jkridner: will be converted into beer!
Aug 02 16:14:42 <_av500_> or rather a bill for it :)
Aug 02 16:14:51 <jkridner> :-)
Aug 02 16:15:08 <_av500_> ok
Aug 02 16:15:14 <_av500_> moving on
Aug 02 16:15:22 <_av500_> forgot the number) standup reports
Aug 02 16:15:27 <_av500_> who is on this week?
Aug 02 16:15:30 <_av500_> nerdboy: ?
Aug 02 16:16:17 <thetransformerr[> me If i remember
Aug 02 16:17:15 <_av500_> go on then :)
Aug 02 16:17:22 <thetransformerr[> ok
Aug 02 16:18:15 <thetransformerr[> so until now I have completed a software part for single axis sampling for sensors
Aug 02 16:18:50 <thetransformerr[> and tested it with using a sig generator for simulating sensor
Aug 02 16:19:15 <thetransformerr[> and scope for checking the pwm output and the sampled data
Aug 02 16:20:07 <thetransformerr[> currently i am working to extend this program for sampling two channels in prudaq, and
Aug 02 16:20:17 <thetransformerr[> get reading from temp sensor
Aug 02 16:20:57 <thetransformerr[> I have completed the logic part, but yet to remove the minor bugs
Aug 02 16:21:23 <thetransformerr[> like variable, data type and other thing
Aug 02 16:21:54 <thetransformerr[> last major task would be to create a interface, that I guess I would complete by this week
Aug 02 16:22:20 <thetransformerr[> using a circuit diagram for hc-sr04 type IC and op-amps etc.
Aug 02 16:22:54 <thetransformerr[> that's all I can summarize , and I would document my test setup with sig gen by tomm
Aug 02 16:22:56 <thetransformerr[> on github wiki
Aug 02 16:23:43 <thetransformerr[> any valuable suggestions or questions or anything
Aug 02 16:23:56 <nerdboy> as long as you limit the prudaq input signal to 0-2 V
Aug 02 16:23:56 <_av500_> thanks for the report
Aug 02 16:24:43 <thetransformerr[> yeah I plan to use resistor for that, or something other you might suggest
Aug 02 16:25:11 <thetransformerr[> and I put pin inside header only after measuring voltage with dmm
Aug 02 16:25:35 <nerdboy> for now make sure your capture starts/stops with the pwm pulse (plus small delay)
Aug 02 16:26:06 <nerdboy> that's what the opamps are for
Aug 02 16:26:36 <nerdboy> filter/gain/voltage-limit on the input side
Aug 02 16:27:07 <thetransformerr[> okk sure, I supposed them mainly for gain or amplyfying weak signals
Aug 02 16:27:17 <nerdboy> anyway, next!
Aug 02 16:27:23 <_av500_> yes!
Aug 02 16:27:32 * nerdboy plays soup-nazi
Aug 02 16:27:48 <thetransformerr[> soup-nazi??
Aug 02 16:27:57 <thetransformerr[> I guess next was indu ???
Aug 02 16:28:04 <ravikp7> pmezydlo: maciejjo indu ?
Aug 02 16:28:18 <pmezydlo> i
Aug 02 16:28:24 <pmezydlo> i'm not sure but i can
Aug 02 16:28:24 <nerdboy> guess you need to google seinfeld
Aug 02 16:28:46 <indu> my regular cycle is next week
Aug 02 16:29:35 <pmezydlo> I always been with maciejjo
Aug 02 16:30:15 * ravikp7 checks irc logs..
Aug 02 16:31:18 <nerdboy> who's on first for real...
Aug 02 16:31:18 <_av500_> indu if you followed the scheme last week
Aug 02 16:31:34 <_av500_> pmezydlo and maciejjo last week?
Aug 02 16:31:49 <indu> last week was ravi and ee
Aug 02 16:31:54 <ravikp7> I and ee had reports last week
Aug 02 16:32:00 <_av500_> ah
Aug 02 16:32:08 <_av500_> then pmezydlo and maciejjo would be this week
Aug 02 16:32:11 <indu> this week pmezydlo and maciejjo
Aug 02 16:32:21 <_av500_> ok, so pmezydlo or maciejjo
Aug 02 16:32:31 <_av500_> since we had thetransformerr[
Aug 02 16:32:38 <nerdboy> if i was supposed to keep track of everything we're in real trouble...
Aug 02 16:33:06 <_av500_> ok, so pmezydlo or maciejjo?
Aug 02 16:33:35 <nerdboy> just ad-lib off the report
Aug 02 16:33:43 <pmezydlo> ok I'm ready
Aug 02 16:33:49 <_av500_> go
Aug 02 16:33:55 <pmezydlo> Welcome on my short standup :)
Aug 02 16:34:05 <pmezydlo> This week I have worked on UART ip core
Aug 02 16:34:24 <pmezydlo> I have divided my work into 4 main tasks. The first task is to create uart transmitter ip block.
Aug 02 16:34:33 <pmezydlo> The second task is to create uart receiver. Then I created fifo and connected everything into a single whole.
Aug 02 16:34:48 <pmezydlo> My uart ip block support different data width (1-16)
Aug 02 16:35:01 <pmezydlo> parity bit, two stops mode etc, diferent speed.
Aug 02 16:35:08 <pmezydlo> It's very interesting ip block. I think :)
Aug 02 16:35:23 <pmezydlo> All uart stuff was mapped in memory.
Aug 02 16:35:32 <pmezydlo> Here is a memory map: https://github.com/pmezydlo/BeagleWire/blob/master/examples/uart/top.v#L166
Aug 02 16:35:45 <pmezydlo> I tested them all with use of a simple application using (/dev/mem).
Aug 02 16:35:53 <pmezydlo>  But now I want to write an uart driver
Aug 02 16:36:03 <pmezydlo> In this week I had a lot of small interrupt.
Aug 02 16:36:13 <pmezydlo> I tested each Ip block,
Aug 02 16:36:17 <pmezydlo> I wrote documentation,
Aug 02 16:36:22 <pmezydlo>  I did a few fix etc
Aug 02 16:36:49 <pmezydlo> When the uart driver will be done
Aug 02 16:36:53 <pmezydlo> I will start working on I2c ip block
Aug 02 16:36:54 <nerdboy> what's the simplest existing driver?  8250?
Aug 02 16:37:13 <pmezydlo> I'm not sure
Aug 02 16:37:39 <pmezydlo> I seen atmel drive is simple
Aug 02 16:37:52 <pmezydlo> Thats all :)
Aug 02 16:38:30 <pmezydlo> do you have any questions?
Aug 02 16:39:56 <m_w> *crickets
Aug 02 16:41:25 <ravikp7> av500 : ping
Aug 02 16:41:42 <pmezydlo> av500: now is silences, I talked something wrong?
Aug 02 16:41:44 <pmezydlo> :)
Aug 02 16:41:45 <ds2> hmmm
Aug 02 16:42:27 <thetransformerr[> that was nice
Aug 02 16:42:51 <pmezydlo> thanks
Aug 02 16:42:58 <thetransformerr[> so, prty is done for today
Aug 02 16:45:47 <nerdboy> pmezydlo: maybe look at drivers/tty/serial/sa1100.c
Aug 02 16:46:13 <nerdboy> looks like you only need to provide your platform_data header
Aug 02 16:46:20 <pmezydlo> ok thanks
Aug 02 16:46:31 <nerdboy> all the rest is kernel stuff
Aug 02 16:47:13 <pmezydlo> good samples are very helpful
Aug 02 16:48:49 <_av500_> damn , my net dropped
Aug 02 16:48:53 <_av500_> sorry, back
Aug 02 16:49:10 <_av500_> pmezydlo: thanks
Aug 02 16:49:46 <pmezydlo> np
Aug 02 16:50:00 <_av500_> ok so
Aug 02 16:50:13 <_av500_> next week its indu and maciejjo then
Aug 02 16:50:20 <_av500_> indu: ^^
Aug 02 16:50:21 <_av500_> maciejjo: ^^^
Aug 02 16:50:22 <maciejjo> ok
Aug 02 16:51:19 <_av500_> ok, we lost indu
Aug 02 16:51:24 <_av500_> anyway, moving on
Aug 02 16:51:27 <_av500_> thanks everybody
Aug 02 16:51:31 <_av500_> 7) anything else=?
Aug 02 16:51:32 <_av500_> ?
Aug 02 16:52:25 <_av500_> guess they all dropped out ;)
Aug 02 16:52:37 <_av500_> 54) thank you all, see you next week
Aug 02 16:52:40 <thetransformerr[> not me yet
Aug 02 16:52:42 <thetransformerr[> thanks
Aug 02 17:32:23 <nerdboy> thetransformerr[: don't forget these examples => http://www.ecircuitcenter.com/Circuits/instamp1/instamp1.htm
Aug 02 17:32:48 <nerdboy> plus a tunable filter
Aug 02 17:32:59 <thetransformerr[> yeah sure
Aug 02 17:35:49 <nerdboy> i think you're short one opamp for two filters plus the inst amp
Aug 02 17:36:15 <nerdboy> so one filter will need to be passive
Aug 02 17:36:37 <thetransformerr[> okk
Aug 02 17:37:01 <nerdboy> that part is kinda important for both signal quality and not blowing up the prudaq
Aug 02 17:37:24 <nerdboy> *for you, me, anyone who comes after...
Aug 02 17:37:30 <nerdboy> especially me
Aug 02 17:39:10 <nerdboy> it should be "easy" to assemble/breadboard if well documented, plus there are spice models to match the examples, so...
Aug 02 17:39:49 <ds2> thetransformerr[: can you catch me up on why you are doing this in HW?
Aug 02 17:41:05 <thetransformerr[> I am not doing exactly like this, and we have to do this because I couldnt lay hands on maxq now
Aug 02 17:41:22 <thetransformerr[> and lastly we can atleast try if that works
Aug 02 17:41:42 <nerdboy> they all need some signal conditioning, maxq included
Aug 02 17:42:04 <nerdboy> *on the input side
Aug 02 17:42:15 <thetransformerr[> earlier I shared a circuit that is what I suppose I would do
Aug 02 17:42:58 <thetransformerr[> and also, since we are keeping tx as tx only not both tx and rx like we were earlier suposed to do
Aug 02 17:43:01 <nerdboy> anything still relevant should be on github
Aug 02 17:43:22 <thetransformerr[> it kinda simplified things we can do on h/w
Aug 02 17:43:34 <thetransformerr[> and yes everything will be on git wiki
Aug 02 17:46:30 <nerdboy> yay i got another mtg at 1100...
Aug 02 17:59:49 <ds2> the maxq shouldn't need it
Aug 02 18:24:49 <mr_science> i meant input-to-prudaq
Aug 02 18:25:19 <thetransformerr[> but I still do need maxq
Aug 02 18:25:31 <mr_science> so output-of-rx-sensor -> "conditioning" -> input-of-prudaq
Aug 02 18:26:03 <thetransformerr[> and I was actually replying to ds2:,
Aug 02 18:26:08 <mr_science> did you measure the output of murata rx in the lab?
Aug 02 18:26:28 * mr_science was also replying to ds2 ...
Aug 02 18:27:07 <mr_science> ie, drive the murata tx with pwm and try to receive?
Aug 02 18:28:00 <thetransformerr[> sorry but i still hv to attach tx
Aug 02 18:28:47 <mr_science> or you coud try to receive with hrs04 or whatever
Aug 02 18:29:20 <ds2> 'k... just think doing filtering in SW is overkill
Aug 02 18:29:44 <ds2> for input to prudaq, a single stage op-amp should suffice
Aug 02 18:30:10 <mr_science> i think the output of rx will be < 10 mV
Aug 02 18:30:24 <thetransformerr[> ds2: you are expert here, please mark down a possible circuit
Aug 02 18:30:33 <mr_science> we need to know what it really is...
Aug 02 18:30:37 <thetransformerr[> that makes sense
Aug 02 18:31:10 <mr_science> mtg got pushed to 1130
Aug 02 18:31:15 <mr_science> bbl...
Aug 02 18:34:04 <ds2> thetransformerr[: what does the PRUDAQ wnat as input?
Aug 02 18:35:07 <thetransformerr[> analog signal b/w 0-2 v  , pretty much same as any adc
Aug 02 18:35:11 <ds2> Off the top of my head a 10-20x non inverting op-amp should do it. Use a LMV324 if you got that... Should run at 1.8V too so that should protect things if you drop the sensor
Aug 02 18:35:25 <thetransformerr[> i got lmv324
Aug 02 18:35:27 <ds2> thetransformerr[: actually no.... there is no standard ADC input
Aug 02 18:36:07 <ds2> thetransformerr[: look up non-inverting op-amp...plenty of circuits along with formula for the gain...
Aug 02 18:36:30 <ds2> should make it easy to throw together (note the LM324 is less suitable, it wants a higher voltage
Aug 02 18:36:33 * thetransformerr[ sent a long message: thetransformerr[_2017-08-02_18:36:32.txt <https://matrix.org/_matrix/media/v1/download/matrix.org/QnBdWQNkKsRqqFFwWxyAebBO>
Aug 02 18:37:33 <ds2> yes, so run it off the 2V or 1.8V rail and that should give you over  voltage protection
Aug 02 18:38:01 <ds2> problem with piezos is the voltage can spike if you slam it mechanically
Aug 02 18:38:42 <thetransformerr[> any rough diagram on pastebin with - - ,
Aug 02 18:41:32 <ds2> https://en.wikipedia.org/wiki/Operational_amplifier_applications
Aug 02 18:41:38 <ds2> see the non-inverting op-amp section
Aug 02 18:42:14 <ds2> just put a 0.1uF cap across the power supply pins for the LMV324
Aug 02 18:42:22 <ds2> make it as close as you can get to the pins on the chip
Aug 02 18:46:30 <ds2> bbl
Aug 02 18:46:58 <thetransformerr[> and bbl means bye ???   :)
Aug 02 19:42:14 <nerdboy> be back later...
Aug 03 00:14:37 <ds2> hmmm
Aug 03 02:01:42 <ds2> nerdboy/thetransformerr[: https://www.youtube.com/watch?v=BNTSSxzm1GM
**** ENDING LOGGING AT Thu Aug 03 03:00:01 2017