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| 08:16 | Bertl_oO | morning se6astian!
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| 08:35 | se6astian | hello!
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| 08:58 | Bertl | wb anuditverma!
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| 09:09 | anuditverma | Hello Bertl :)
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| 09:16 | Bertl | welcome Tanos! welcome Christofpap!
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| 09:19 | Christofpap | Hello Bertl! I spoke with Herbert Poetzl that the T728 had one other person, so i could help on this subject
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| 09:20 | Bertl | correct, the former is me and the latter is se6astian :)
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| 09:21 | Christofpap | Also i interested for T732, could you tell me more details for this because i think that i can help on this subject
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| 09:21 | Christofpap | thank you!
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| 09:23 | Bertl | well, what would you like to know?
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| 09:24 | Bertl | and maybe let's hear how you interpret those tasks and how you would go about solving them?
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| 09:33 | Christofpap | i had implemented this circuit with fan(https://www.youtube.com/watch?v=ng-OwJeXQxE) and i will implement it with the similar way but with VHDL on FPGA
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| 09:40 | Bertl | well, the microcontroller approach won't work on the FPGA
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| 09:41 | Bertl | you also need to incorporate a number of sensors not directly connected to the FPGA and user preferences for this task
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| 09:41 | Bertl | so basically it consists of a PWM controller attached via e.g. I2C or SPI and remote accessed via the main FPGA (ZYNQ)
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| 09:42 | Bertl | the control loop probably should be running on the ARM cores inside the ZYNQ and retrieve the sensor values from the control daemon
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| 09:43 | Bertl | how about T728?
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| 09:47 | Christofpap | the scope of T728 is the creating a image sensor without using a actual sensor?
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| 09:47 | Bertl | correct, at different levels
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| 09:50 | Tanos | Hi Bertl! I am interested for T726, T722, T734, T720. For task T726 I don’t have the required skills for the FPGA implementation, is there any chance getting it? I am asking because it is labeled as  optional .
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| 09:50 | Bertl | quite a number of tasks, let me check what they are :)
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| 09:52 | Bertl | T720 and T726 you want to talk with se6astian or alexML
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| 09:52 | Christofpap | In the original data file i will run machine learning algorithms for classification and i will have some classes as patterns. The same way i will do in the fakes data and i will compare them
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| 09:52 | Bertl | Tanos: T722 you probably best chat with BAndiT1983|away when he's around
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| 09:53 | Bertl | Christofpap: do you have experience with FPGAs and HDL coding? maybe any example code you wrote?
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| 09:54 | Bertl | Tanos: for T734 you are right with me and alexML :)
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| 09:54 | Christofpap | Yes, my thesis was with FPGA and VHDL coding
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| 09:55 | Bertl | Tanos: regarding the FPGA part, sure you can acquire the skills for that, but I would check first if that is something you want to do
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| 09:55 | Bertl | Christofpap: any links/URLs?
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| 09:59 | Christofpap | https://drive.google.com/open?id=0Bw4975seDipbWWpKWWhJYzhXN00 be in Greek, thes subject is how to connect with bluetooth module on a SMA Inverter(Inverter of Solar Panel) and how to retrieve data of it with FPGA and arduino
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| 10:01 | Tanos | Great thank you. I have no experience with FPGAs and I don’t know if it is possible to acquire all the skills needed to complete the task. On the other hand FPGAs is within my field of interest and I plan on investing time learning the craft.
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| 10:04 | Bertl | well, I know for sure that half a year is more than enough to learn a HDL and how to progam FPGAs and use that to get a working cinema camera prototype done :)
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| 10:06 | Bertl | Christofpap: did you code both the RX.VHD as well as the TX.VHD?
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| 10:09 | Christofpap | yes, in these files i wrote a procedure to send bytes (depending baud rate) to bluetooth module via RS232 port
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| 10:09 | Christofpap | and in the RX.VHD the inverse way
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| 10:10 | Tanos | If that’s the case then I will be more than happy learning it. How do you think I should state it in my application? (That I have no FPGA skills but I am currently developing my skills and knowledge?)
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| 10:14 | Bertl | Christofpap: and why do they look so different in capitalization and indentation?
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| 10:14 | Bertl | Tanos: sounds good to me
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| 10:16 | Bertl | also note, that even if GSoC does not happen for motivated folks, contributions are still welcome and we will figure out a way to compensate those
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| 10:17 | Christofpap | Sorry, but i don't understand you
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| 10:18 | Bertl | well, in a thesis, I would expect you to have some kind of coding style and to adhere to it
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| 10:18 | Bertl | now looking at page 52 and 53 I see all lower case and indentation for port signals
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| 10:19 | Bertl | but then, the RX.VHD suddenly is all uper case and no indentation in the entity definition at all
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| 10:20 | Bertl | so for me it looks more like it came from two different sources
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| 10:23 | Tanos | That's so good to hear Bertl! Thank you for the info.
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| 10:24 | Christofpap | Ok, i understand it was i way to understand better the code with my professor. Because i would like to do two times the same way. It was a convension with my professor
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| 10:28 | Bertl | so what are your questions regarding the tasks you're interested in?
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| 10:32 | Christofpap | If i could help on this subject
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| 10:32 | Christofpap | thank you!
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| 10:37 | Bertl | as I said, all help is welcome, so go ahead and start contributing
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| 10:38 | Christofpap | thank you!
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| 10:39 | Bertl | you're welcome!
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| 11:12 | niculescu_vlad | Hello!
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| 11:12 | niculescu_vlad | Mr. Bertl?
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| 11:12 | Bertl | hey niculescu_vlad!
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| 11:12 | Bertl | welcome Xumerio
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| 11:13 | Xumerio | Thanks
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| 11:13 | niculescu_vlad | I we had a discussion on T732 five days ago
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| 11:14 | niculescu_vlad | I want to know if you came with new considerations
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| 11:14 | niculescu_vlad | till that moment, temperature sensors were the only input in the algorithm
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| 11:15 | Bertl | we had a discussion here on IRC a few days ago (check the logs for details) about the control loop
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| 11:15 | niculescu_vlad | Furtheremore, as you said, the problem with fan is that it will produce noise sounds that will affect the recording
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| 11:16 | niculescu_vlad | I want to propose my own idea, to design an noise canceling adaptive filter that will reject that noise
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| 11:16 | niculescu_vlad | what do you think?
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| 11:16 | Bertl | interesting, go on ...
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| 11:17 | niculescu_vlad | Ok. The noise produced by the fan is almost constant and easy to distinguish. Taking some recordings and training an algorithm can result in impresssive results
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| 11:18 | niculescu_vlad | and the FPGA is very good for digital filters. Especially high order filters, because the adders work in parallel
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| 11:18 | Bertl | well, there is one problem though, audio is normally recorded with separate equipment
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| 11:19 | niculescu_vlad | but is that equipment close to the camera?
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| 11:19 | niculescu_vlad | to the fan
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| 11:19 | Bertl | but it is a good idea to collect information about the fan (and record it somewhere) to compensate in post
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| 11:19 | Bertl | (post = post production)
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| 11:19 | niculescu_vlad | anyway, further processing can be done
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| 11:19 | niculescu_vlad | yes
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| 11:20 | niculescu_vlad | And about the Fan Application.
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| 11:20 | Bertl | yes?
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| 11:22 | niculescu_vlad | All users proposed to use a PID control. Which is quite easy to implement. I suppose the input depends on the sensors values, and their distance from the fan. But I am thinking at a better idea. A machine learning approach. Trained with sensors values, distances, and the appropriate fan speed (PWM vlaue)
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| 11:22 | niculescu_vlad | In this way, it can learn what PWM should generate for the fan when specific sensors values are received
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| 11:23 | niculescu_vlad | it can provide better results than the PWM, as it can model the nonliniarities better
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| 11:23 | niculescu_vlad | it is just an idea
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| 11:23 | niculescu_vlad | it deserves to be taken into account
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| 11:23 | Bertl | an interesting idea, not sure it isn't overkill though
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| 11:24 | Bertl | one aspect I think is very important is that there need to be different 'modes' with different limits and target temperatures
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| 11:24 | niculescu_vlad | No, it isn't. A quite small training data set can be suffiecient. (around 30-40 samples)
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| 11:25 | Bertl | e.g. you typically want a 'silent' operation during a shot, which doesn't really take that long (normally a few minutes)
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| 11:25 | Bertl | then you can cool at full power between two shots
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| 11:26 | Bertl | and you want to keep a good but not annoying 'cool' during longer idle periods
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| 11:26 | niculescu_vlad | yes. A research should be done to investigate how temperature ranges during a shot
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| 11:27 | Bertl | in all cases we want to keep 'acceptable' temperatures in all places and warn if we go over
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| 11:27 | niculescu_vlad | yes. The algorithm has to act like a switch-case function
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| 11:28 | niculescu_vlad | And all the measurements should be done in warm environments, too. It might work at 17 degrees celsius, but it won't work for 25
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| 11:28 | niculescu_vlad | Just an example
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| 11:32 | Bertl | yup
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| 11:32 | Bertl | maybe add your ideas to the lab task
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| 11:33 | niculescu_vlad | Ok
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| 14:18 | Captain_Rubik | Hi
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| 14:18 | Bertl | hey
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| 14:18 | Captain_Rubik | Where can I find GSOC ideas for this organisation?
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| 14:18 | Captain_Rubik | TIA
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| 14:19 | Bertl | here: https://lab.apertus.org/project/view/20/
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| 15:04 | Bertl | welcome rock!
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| 16:12 | Xumerio | :)
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| 16:23 | Bertl | off for now ... bbl
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| 22:15 | se6astian | off to bed
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| 22:15 | se6astian | good night
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| 22:16 | Bertl_oO | nn
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