**** BEGIN LOGGING AT Tue Jun 20 03:00:04 2017
Jun 20 08:35:24 <thetransformerr> hi ds2: I used CRO today to checkout waveforms, it was a naive setup, as the concerned lab faculty was not present today
Jun 20 08:37:06 <thetransformerr> What I observed was when I sent the square wave, the receiver output was in sine waves,
Jun 20 08:38:41 <thetransformerr> the pulse was generated from wave generator, at 40kHz and at 2.8V and 30Vpp
Jun 20 08:40:17 <thetransformerr> I connected this output directly to the transmitter and connected the receiver directly to CRO
Jun 20 08:41:10 <thetransformerr> what I received were like sine waves in distorted form, may be this was due to the loose conections
Jun 20 08:41:42 <thetransformerr> now I have access to the lab, what would you like me to do in the lab??
Jun 20 13:17:26 <ravikp7> jkridner: hi, any success? spl device gets opened?
Jun 20 13:50:55 <ravikp7> jkridner: SPL's this error "The remote end did not respond in time" means actually what? like what does it expect from host before the bootp broadcast?
Jun 20 14:07:40 <ravikp7> jkridner: now, I'm also not seeing any bootp broadcast after spl transfer on windows, getting same error
Jun 20 14:08:44 <ravikp7> don't know how it showed up yesterday
Jun 20 14:10:10 <ravikp7> jkridner: I've run out of ideas now on how to proceed to fix this problem :(
Jun 20 17:05:26 <nerdboy> thetransformerr[: you're using the murata tx/rx parts?
Jun 20 17:05:41 <thetransformerr[> yes
Jun 20 17:06:49 <nerdboy> 30 Vpp sounds lilke a lot
Jun 20 17:07:19 <nerdboy> so not the prudaq just straight into a scope inptu?
Jun 20 17:07:28 <thetransformerr[> 20Vpp was the req I guess
Jun 20 17:07:29 <nerdboy> *input even
Jun 20 17:07:46 <thetransformerr[> no I didnt done anything with prudaq
Jun 20 17:08:55 <nerdboy> so in that case we'd need a separate power supply to dtive the sensor circuit?
Jun 20 17:10:08 <nerdboy> how big is the signal coming out of the rx side?
Jun 20 17:10:33 <thetransformerr[> of course we need to cchange the voltage level, we discussed it earlier and that's why we decided to try with already built circuit
Jun 20 17:10:45 <nerdboy> yup
Jun 20 17:11:30 <nerdboy> can you get a picture of the scope output?
Jun 20 17:11:46 <thetransformerr[> the signal strength was good, but they had some distortion and I dont know why they looked like sine waves and
Jun 20 17:11:55 <thetransformerr[> yes I m uploading them now
Jun 20 17:13:33 <nerdboy> i would think a noisy sine wave is about right
Jun 20 17:18:11 <thetransformerr[> yeah I also think this, but I cant do much experiments today as I didnt knew how to create trigger pulses from wave generator and incharge was not present today
Jun 20 17:19:13 * thetransformerr[ uploaded an image: DSC_0028.jpg (574KB) <https://matrix.org/_matrix/media/v1/download/matrix.org/jfqeNsQkoQJEsMpbLMeZTtGr>
Jun 20 17:19:17 * thetransformerr[ uploaded an image: DSC_0029.jpg (580KB) <https://matrix.org/_matrix/media/v1/download/matrix.org/VlbtzHqwJcAMuPfCTkNsZvyh>
Jun 20 17:19:17 * thetransformerr[ uploaded an image: DSC_0030.jpg (621KB) <https://matrix.org/_matrix/media/v1/download/matrix.org/tQDDjkigbZWQdTwFTKrjvRBf>
Jun 20 17:19:21 * thetransformerr[ uploaded an image: DSC_0027.jpg (486KB) <https://matrix.org/_matrix/media/v1/download/matrix.org/BnoyQstaUyfWlpHuPjegaXtj>
Jun 20 17:19:40 <thetransformerr[> and somehow I forgot to click receiver output, the very most objective I went to college :(
Jun 20 17:20:21 <thetransformerr[> the wave shown in scope is from wave generator directly
Jun 20 17:22:13 <nerdboy> so you did get an output signal from rx?
Jun 20 17:22:28 <thetransformerr[> and in the wave function generator image, now I get to know why I
Jun 20 17:22:56 <thetransformerr[> lost receiver output afterwards
Jun 20 17:23:48 <thetransformerr[> yes I connected the receiver the same way as shown in breadboard transmitter image, and I received a noisy sine waveform
Jun 20 17:26:43 <thetransformerr[> now nerdboy: I am planning to do these things, create a code for PRU to trigger the transmitter, so how should I trigger them, whether I should use GPIO or eCAP module of PRU??
Jun 20 17:29:29 <thetransformerr[> and then store receiver and transmitter waveform from ADC and then use cross correlation to find TOF using some python library like scipy etc
Jun 20 18:05:56 <nerdboy> mdp's ecap driver is for pulse capture
Jun 20 18:06:23 <jkridner> hi ravikp7
Jun 20 18:06:51 <ravikp7> jkridner: hi
Jun 20 18:08:49 <jkridner> I've not been able to clone the repo on my Windows machine for some reason.
Jun 20 18:08:50 <ravikp7> jkridner: you got my last messages here earlier today?
Jun 20 18:09:55 <jkridner> on-line, are you seeing anyone having been successful with booting code via SPL RNDIS/TFTP?
Jun 20 18:10:01 <jkridner> vvu, hints?
Jun 20 18:10:04 <nerdboy> thetransformerr[: i think this is more what the output side should look like => https://gist.github.com/shirriff/2a7cf2f1adb37011da827f1c7f47b992
Jun 20 18:11:53 <ravikp7> jkridner: I could find only vvu's code and email threads of not succeeding on Windows, so sign of success anywhere
Jun 20 18:12:04 <ravikp7> *no
Jun 20 18:13:02 <ravikp7> jkridner: https://sourceforge.net/p/libusb/mailman/message/32740724/
Jun 20 18:14:01 <ravikp7> jkridner: I tried the windows-partial branch of BBBlfs, it gets upto getting tftp request for spl but couldn't transfer spl
Jun 20 18:15:58 <jkridner> ravikp7: but, the firmware works on Linux and OSX, so I have my doubts to the vacuous responses.
Jun 20 18:15:59 <ravikp7> jkridner: SPL's this error "The remote end did not respond in time" means actually what? like what does it expect from host after spl transfer and before the bootp broadcast? I can't understand this :(
Jun 20 18:16:42 <jkridner> ravikp7: seems like there isn't host enumeration even of the SPL device. If I had a bus analyzer, I could look at the enumeration process and see if it even sets and endpoint.
Jun 20 18:17:08 <jkridner> ravikp7: on Linux, usbmon should tell you.
Jun 20 18:17:33 <jkridner> looks like OSX has something similar: https://developer.apple.com/library/content/qa/qa1370/_index.html
Jun 20 18:25:04 <ravikp7> jkridner: http://www.usblyzer.com/ should I try this on windows?
Jun 20 18:26:27 <jkridner> looks reasonable.
Jun 20 18:27:53 <ravikp7> trying this
Jun 20 18:49:07 <jkridner> ravikp7: seems like Windows requires a fair amount of driver install. :(
Jun 20 18:56:01 <ravikp7> jkridner: for what? getting whole thing working?
Jun 20 18:56:04 <jkridner> ravikp7: with the driver installed on Windows 7, I'm able to see the device from node-usb, but opening it fails. :(
Jun 20 18:56:36 <jkridner> LIBUSB_ERROR_NOT_FOUND
Jun 20 18:57:09 <ravikp7> jkridner: you must be getting libusb_not_supported?
Jun 20 18:57:57 <ravikp7> jkridner: node-usb description says that without those drivers, device won't open
Jun 20 18:58:31 <jkridner> hmmm... Installed the libusb-win32 drivers for the particular VID/PID.
Jun 20 18:58:42 <jkridner> had to make a .INF using the wizard. :-/
Jun 20 18:59:51 <ravikp7> there's option to list all connected usb devices and install required drivers
Jun 20 19:00:14 <ravikp7> why did you use vid/pid to install?
Jun 20 19:04:23 <jkridner> ravikp7: to get the driver to associate with the device and load/run.
Jun 20 19:04:41 <jkridner> ravikp7: the open to list the connected devices didn't show my board.
Jun 20 19:05:21 <jkridner> the board shows up as a device, but the device.open() call fails with LIBUSB_ERROR_NOT_FOUND.
Jun 20 19:05:44 <jkridner> I know the device is correct, because the idVendor/idProduct match.
Jun 20 19:06:12 <jkridner> this.__getConfigDescriptor() native call fails.
Jun 20 19:06:37 <ravikp7> jkridner: was getting same when using usb 2.0 port
Jun 20 19:07:27 <ravikp7> jkridner: try with a usb 3.0 port, it worked only this way for me
Jun 20 19:07:48 <ravikp7> I checked with another pc also
Jun 20 19:08:19 <jkridner> ravikp7: https://github.com/tessel/node-usb/issues/61 claims a work-around, but I don't yet have it working.
Jun 20 19:12:03 <ravikp7> jkridner: developer closed the issue with description of solution see last comment
Jun 20 19:21:34 <ravikp7> jkridner: I checked with usb analyzer tool, when I connect to a 2.0 port, it lists only device description in properties, while on connecting to 3.0 port, it shows device description, config description and interfaces also in usb properties
Jun 21 00:56:22 <ds2> thetransformerr[: you are seeing a sine like wave probally because of the limited response of the transducer.
Jun 21 02:55:05 <thetransformerr[> ds2: why is transducer having limited response
Jun 21 02:56:11 <thetransformerr[> due to loose conections???
Jun 21 02:56:30 <thetransformerr[> aur no interfacing
**** ENDING LOGGING AT Wed Jun 21 03:00:03 2017