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| shenki | Joelw: :) | 00:15 |
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| shenki | Joelw: feel free to move the discussion with ajit (tija) onto the hdmi2usb mailing list | 00:28 |
| shenki | For all students, I would like to see more of the private discussions happening on-list | 00:29 |
| shenki | We have a great group of people with overlapping skillsets who can contribute | 00:29 |
| shenki | and selfishly; I get to learn more if it's on list | 00:30 |
| Joelw | Sounds good - will do if there's any further discussion! | 00:35 |
| Joelw | (the answer to the question he asked was basically "Dunno! But it doesn't really matter." | 00:36 |
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| shenki | Joelw: cool. thanks for helping out | 01:28 |
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| tija | shenki: Hi! Did you read my blog post? | 04:11 |
| shenki | tija: hello! | 04:14 |
| shenki | tija: I did | 04:14 |
| shenki | tija: great work on the blogging; it's really good to follow your progress | 04:14 |
| tija | shenki: Any comments? | 04:14 |
| shenki | oh, noob question: What does MSB stand for? | 04:15 |
| shenki | The first 2 clocks are used by MSB | 04:15 |
| tija | Shenki: Oops! That should be MCB- Memory Controller Block | 04:18 |
| shenki | ah ok | 04:19 |
| tija | Joelw: Did you send me a mail? | 04:30 |
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| shenki | tija: he mentioned that he did mail you back | 04:41 |
| tija | okay | 04:42 |
| shenki | you didn't recieve it? | 04:42 |
| tija | I did not recieve it | 04:43 |
| shenki | hrm | 04:44 |
| shenki | he mentioned that the answer was "don't know, but it doesn't really matter" | 04:44 |
| shenki | but you should follow up with him when he's around | 04:44 |
| shenki | I don't know what the question was :) | 04:45 |
| shenki | tija: you should cc emails like that to the hdmi2usb list, so others can learn from the answers | 04:45 |
| tija | shenki: Okay | 04:45 |
| Joelw | tija: What's your address? | 05:47 |
| tija | [email protected] | 05:47 |
| Joelw | Yep, that's where I sent it to! | 05:48 |
| tija | Joelw: what is your address? | 05:49 |
| Joelw | [email protected] | 05:49 |
| tija | I haven't recieved a mail from this address | 05:50 |
| tija | Joelw: Do you read my blog? | 05:50 |
| Joelw | :( | 05:50 |
| Joelw | No! | 05:50 |
| Joelw | What's the address? | 05:50 |
| tija | http://ajitmathewgsoc.blogspot.in/2014/05/clocking-of-hdmi2usb.html | 05:51 |
| tpb | Title: TimVideo GSoC 2014: MJPEG Optimisation: Clocking of HDMI2USB (at ajitmathewgsoc.blogspot.in) | 05:51 |
| tija | Joelw: Give it a read, then maybe you can appreciate why I have the doubt. If I am wrong please correct me. | 05:52 |
| Joelw | tija: I'll try emailing you from my work address | 06:00 |
| tija | Joelw: thanks! | 06:01 |
| Joelw | Is HDMI2USB using the same PLL dividers as my article? | 06:01 |
| tija | Yes exactly same | 06:03 |
| Joelw | I've had another look at it and can't see why it wouldn't be 78 MHz | 06:06 |
| Joelw | I'd recommend running the clock generating wizard! | 06:07 |
| Joelw | If you give it an input of 100 MHz and fiddle with the divider/multipliers to make it the same (*25/4) you can see what the resulting output is | 06:08 |
| Joelw | If all else fails and you have an oscilloscope or frequency counter, you can always send the clock out to a pin and examine it there :) | 06:08 |
| tija | Joelw: Just because of your comment and since the maths work out to be in favour of 32 Mhz I thought asking you. I will check the clock frequency and report back. Thanks! | 06:11 |
| Joelw | Hmm! Did you get my email that time? | 06:20 |
| Joelw | I get 100 * 25 / 4 / 8 = 78.125 | 06:21 |
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| shenki | mithro: how was the flight home? | 06:32 |
| mithro | shenki: Oh, btw while I was in the states playing with the Atlys board with Carl I realised we have a big part missing of the Digilent Atlys Board for HDMI2USB information | 06:32 |
| mithro | https://github.com/timvideos/HDMI2USB/wiki/Digilent-Atlys-Board:-Loading-Firmware#stage--1 | 06:33 |
| tpb | Title: Digilent Atlys Board: Loading Firmware · timvideos/HDMI2USB Wiki · GitHub (at github.com) | 06:33 |
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| shenki | mithro: hrm ok | 06:53 |
| shenki | mithro: iirc, you shouldn't touch any of the jumpers | 06:53 |
| shenki | nor should you cut the track that we used to tell people to cut :P | 06:53 |
| shenki | we used to have instructions on what jumpers to set | 06:54 |
| shenki | was that our docs, or was it the docs that come with the dev board? | 06:54 |
| shenki | mithro: any progress on the board? | 06:54 |
| mithro | shenki: the jumpers matter regarding the EDID control of the HDMI output I think | 06:57 |
| mithro | IE the JP6 / JP7 - SDA / SCL for HDMI IN | 06:58 |
| mithro | Any idea about JP8 near that too? | 06:59 |
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| shenki | ah okay. i was meaning that i thought the default config was the correct one. i'll check when i get home | 07:15 |
| Joelw | I vaguely recall that the factory setting for one of the jumpers is or at least used to be completely wrong - shorting the SDA and SCL together | 07:17 |
| Joelw | I don't think my board has a JP8 at all and the manual doesn't actually say what orientation the jumpers are meant to have | 07:17 |
| Joelw | Err, it has a JP8, but it didn't come with any jumpers for it | 07:17 |
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| tija | Joelw: The clock is working correctly- 78Mhz | 08:29 |
| tija | Joelw:with that comment you just got my hopes up. Turns out this was pure coincidence. | 08:35 |
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| Joelw | tija: OK, great! :) | 12:00 |
| tija | Joelw: Honestly I wanted it to work at 32 Mhz atleast then we knew what our problem was | 12:01 |
| tija | 15 fps @ 78 Mhz is very poor | 12:04 |
| Joelw | Any idea where the bottleneck is? | 12:10 |
| Joelw | Is it using all the FPGA area? | 12:10 |
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| tija | Joelw: Not sure about bottle neck in simulation encoder works at 50 fps @ 100Mhz | 12:28 |
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| tija | Joelw: Encoder is using quite lot of BRAMs about 41% | 12:34 |
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| mithro | tija: where is that comment from? | 14:11 |
| mithro | tija: Jahanzeb wrote the HDMI2USB firmware, not Joelw | 14:11 |
| tija | mithro: that comment was from a tutorial Joelw wrote on DDR2 interfacing | 14:13 |
| mithro | tija: ahh well | 14:13 |
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