Current Server Time: 07:53 (Central Europe)

#apertus IRC Channel Logs

2017/07/15

Timezone: UTC


01:48
jucar1
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07:46
se6astian|away
changed nick to: se6astian
08:01
mithro
felix_: Got a moment shortly to discuss the SDI stuff a bit?
08:03
felix_
sure
08:06
felix_
mithro: Bertl_zZ said that you have started some adapter board to be able to plug a single or dual axiom extension module into the tofe slot on the hdmi2usb board; can you point me to that design?
08:07
mithro
felix_: I'll give you two guesses on where you might find that :-P
08:09
felix_
ah, found it on github https://github.com/timvideos/HDMI2USB-TOFE-AXIOM-adapter
08:11
mithro
felix_: :-P
08:11
mithro
felix_: It's not great
08:12
felix_
i'll see if it's easier to fix the design or redo the board from scratch
08:17
se6astian
changed nick to: se6astian|away
08:48
mithro
felix_: The schematic is fine, the PCB could have the high speed traces re-routed to be less weird
08:49
mithro
felix_: So I feel like I'm a bit out of the loop around your plans -- as one of the major stake holders of the project it would be good if you could keep me updated on how things are going and such
08:50
mithro
felix_: Totally understand with se6astian / Bertl_zZ both being in the same timezone as yourself it is easier to collaborate with them
08:52
mithro
felix_: I assume we are still waiting to hear back from the prototype fund?
08:55
mithro
felix_: You also visited the Bertl / se6astian in Vienna?
08:57
mithro
felix_: Also wanted to chat about https://docs.google.com/drawings/d/1DuZYa9mfnueYWhrIyPQ-Ifr7PnmmNQIBdbBN1t8sykw/edit
09:01
felix_
hm, i thought i did write an email with the current plan?!
09:01
felix_
yep, i visited se6astian|away and Bertl_zZ in vienna
09:02
felix_
i'm still waiting for feedback from the prototype fund
09:04
felix_
mithro: have a look for the email with the message id 04ca1464-4258-702e-f511-0aa846f7e0f1@felixheld.de that's the curret plan
09:04
felix_
*current
09:06
mithro
Short update on the SDI module itself: We'll make a SDI module for the AXIOM that uses both slots. With the adapter board it can also be plugged into the HDMI2USB.
09:06
mithro
To make the process of creating a board for that easier, I'll design a baseboard for the Artix 7 with gigabit transceivers module from Trenz that has 2x SDI in, 2x SDI out and the required clocking circuitry. When SDI works on those (tested with one of the proprietary cores), I'll design the AXIOM module containing an Artix 7 and the SDI stuff.
09:06
mithro
The 12G SDI via a Kintex 7 FPGA would only work with the FPGA in the really big packages; the ones in the smaller packages don't support 12Gbit/s.
09:06
dimaursu16
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09:06
mithro
I don't understand the second line
09:07
felix_
to test the sdi circuitry it's easier to make a baseboard for the trenz fpga module with gigabit transceivers and not do a full board design with the fpga on the same board
09:08
felix_
so basically use a known-working fpga module first to test the sdi circuitry and then do the real board with both sdi circuitry and fpga on the same board
09:09
mithro
A FPGA module which maps the Trenz FPGA module to the SPF interface and a SPF to SDI boards currently exist?
09:10
felix_
spf?
09:10
mithro
s/spf/SFP/
09:10
mithro
https://en.wikipedia.org/wiki/Small_form-factor_pluggable_transceiver -- ?
09:11
felix_
no, the sfp thing is dead; too expensive
09:11
mithro
felix_: To expensive in what way?
09:11
felix_
i'll make a board first that contains sdi cable driver and equalizer chips and this board will be plugged onto it https://shop.trenz-electronic.de/de/TE0714-02-35-2IC6-FPGA-Modul-mit-Xilinx-Artix-7-XC7A35T-2CSG325I-Speedgrade-2-1.8-V?c=365
09:11
felix_
well, the sdi sfp costs around 300 euros or so
09:12
felix_
making a custom base board with the sdi chips is cheaper and since the final design will also use those chips, that's imho a better way
09:12
mithro
felix_: See, this is where i'm out of the loop
09:13
felix_
hm, yeah, i somehow thought that this was clear from the email, but yeah, that wasn't really clear when you don't know the changed plan :/
09:14
mithro
felix_: So what is the current plan to get from "nothing" to the end goal?
09:17
felix_
before september i'll make a base board for the trenz module that has 2x sdi in and 2x sdi out (no sdi sfp involved) and test it with a commmercial sdi core to make sure the hardware works. then i'll design a custom board for the dual axiom connector with an artix7 fpga and the sdi chips and rework/redisign the axiom-tofe adapter board
09:19
mithro
A couple of things to keep in mind, I have access to someone who can do reasonable good job of PCB routing for us
09:20
mithro
I feel like it's best to concentrate on the software side of things first?
09:20
felix_
routing pcbs isn't that difficult for me
09:20
felix_
no, i'll do the pcb stuff before the project begings in september
09:21
felix_
the funding is only for the software and gateware part
09:23
mithro
I would also like for this software to work with stuff people can buy too, so that even if expensive people can buy the parts and replicate having a working board
09:24
mithro
Having people able to use the Digilent boards with the HDMI2USB firmware has been really useful for people who want to play with stuff
09:24
felix_
you mean with a widely available fpga board with some really expensive sdi fmc board? sure that will also work
09:24
mithro
felix_: Yeah
09:25
mithro
felix_: Which is the route I thought we were taking with the Trenz stuff
09:25
mithro
felix_: That planning doc also had the idea of FMC based system
09:25
mithro
There are lots of FMC based options - they are quite expensive but many people of the interested will also have half the parts already....
09:26
felix_
for the kintex version the sdi fmc board probably is the way to go
09:27
mithro
felix_: While I'm sure PCB routing is easy for you, your time is also pretty precious :-P
09:27
mithro
There also seems to be some plan about trying to get the C3VOC to use an AXIOM camera at 34C3?
09:28
mithro
If something like that is going to happen, I'm very interested in being there in person
09:28
felix_
i talked to someone from the c3voc and he said that it's rather easy for them to swap one of their cameras with an axiom with sdi output
09:28
felix_
integrating a hdmi2usb board in their flow isn't that trivial though
09:29
felix_
if the sdi output for the axiom gets ready until the 34c3, i'm quite sure that it will be used. maybe not as primary camera for a conference room, but at least as second camera
09:29
felix_
i'm afk for maybe 20 minutes; have to go to the office now
09:30
mithro
felix_: Okay, I'm pretty tired so I'm going to finish for the night too
09:45
felix_
ok. good night
09:45
mithro
felix_: but we should try and make sure we are all on the same page about what we are trying to do
09:46
felix_
definitely
09:49
felix_
mithro: i'd like if you also talk to Bertl_zZ and se6astian|away to make sure that you expect the same from the project
09:49
mithro
felix_: Yeah
09:51
felix_
and yes, i'm not that experienced in project planning and similar stuff; still have to learn a thing or two there :)
10:04
felix_
i think it would be good to have some google hangouts session in the early evening (maybe ~17:00 UTC?) some day
10:55
Bertl_zZ
changed nick to: Bertl
10:55
Bertl
morning folks!
10:55
Bertl
felix_: make that IRC instead and I'm in :)
11:05
felix_
would also be ok for me, although i find voice chat more efficient for that sort of stuff
11:06
Bertl
I don't do voice chat.
11:16
comradekingu
Can still listen in
11:59
BAndiT1983|away
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12:57
Bertl
off for now ... bbl
12:57
Bertl
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se6astian|away
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BAndiT1983
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BAndiT1983|away
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BAndiT1983
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se6astian
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se6astian|away
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se6astian
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se6astian|away
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18:18
felix_
leaves his office now; not sure if i'll open my irc client before tomorrow again
18:23
Bertl_oO
have a nice evening then!
19:02
BAndiT1983|away
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21:22
se6astian
off to bed
21:22
se6astian
good night
21:22
se6astian
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BAndiT1983
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