Saturday, 2016-05-14

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CarlFKI have an upgraded Opsis!00:33
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JoelwSo what's the deal with HDMI input, anyway?04:49
JoelwSomeone's asked me for help with getting the Atlys XAPP495 dvi_demo video switcher working, and I'm very hazy on how to do it04:50
JoelwDoes hdmi2usb implement any sort of EDID ROM for the inputs? Or do you pass it through?04:50
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JoelwI presume that the jumper settings in would apply to dvi_demo too04:51
tpbTitle: HDMI2USB-misoc-firmware/ at master · timvideos/HDMI2USB-misoc-firmware · GitHub (at
JoelwUnfortunately I've lent my Atlys to someone so I'm no longer able to actually test it04:51
JoelwIt'd be nice if I could update my Atlys page with the definitive "Here's how to get XAPP495 working"guide04:51
CarlFKJoelw: EDID is kinda burned into it05:08
CarlFKkinda because you can change it to on of about 1205:08
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JoelwCarlFK: Ah, you present a choice of EDID 'ROM' to each of the inputs?05:29
CarlFKJoelw: um... no.  you config the whole thing (2 inputs, 2 outputs and the mjpeg encoder) to a single setting05:30
CarlFKthat's what the inputs send in the edid as the 1 supported res05:30
CarlFKand is is what the outputs send regardless of what they get via edid of the device they are sending to05:31
JoelwSounds good! I reckon that's what dvi_demo needs to fix it - just present an EDID to the inputs with only 1280x720 or something05:32
CarlFK  that's what is supported05:33
tpbTitle: Ubuntu Pastebin (at
CarlFKcurrently.  more can be added if someone adds it to the firmware05:33
CarlFKHDMI2USB>video_mode 905:34
CarlFKSetting video mode to 1280x720 @60Hz05:34
JoelwThanks! I might see if I can add that to dvi_demo somehow. Bit tricky to test without a board, but might be fun :)05:35
JoelwDoes the Vivado download include ISE?05:37
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JoelwI've got a Nexys Video in the post, so I don't want to download two things if I don't have to! :)05:37
CarlFKVivado download ?05:39
CarlFKI have looked at the source code, and thanks to tim's scrips that do everything I have built ... but that's about the extent of what I know about the tool chain05:40
JoelwVivado's Xilinx tool for 7-series devices. It looks like they used to be bundled together, but haven't been since 2013.05:40
JoelwCool, no worries :)05:40
mithroJoelw: if you have a nexus video, you should checkout
tpbTitle: GitHub - hamsternz/Artix-7-HDMI-processing: Receiving and processing 1080p HDMI audio and video on the Artix 7 FPGA (at
mithroJoelw: we don't use the XAPP stuff anymore06:11
mithroJoelw: no, ISE isn't included in the Vivado download06:11
mithroJoelw: _florent_ is working on porting our code to the Nexys Video ->
tpbTitle: GitHub - enjoy-digital/nexys-soc: Digilents Nexys Video SoC based on LiteX (at
CarlFKmithro: did you see I flashed my opsis?06:36
tpbTitle: video-scripts/ at master · xfxf/video-scripts · GitHub (at
CarlFKim off to bed.  see ya06:37
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Joelwmithro: Yes! I don't understand how that guy finds the time to do interesting things all the time.08:06
JoelwYep, I found all of your Python stuff - looks very interesting, but a bit foreign to me (but even Verilog does now that I haven't touched it for three years)08:07
tumbleweedCarlFK: skwaaaak
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tumbleweed\o/ working jtag to an opsis (not the broken one, though)08:35
tumbleweedmithro: there?08:37
tumbleweedmithro: even with bscan_spi_xc6slx45t.bit programmed, the fx2 doesn't come up08:47
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mithrotumbleweed: you said something about the 3V3 being low?10:10
tumbleweedit seems that way on the working ones too10:20
tumbleweedmithro: and the fbga seems to be behaving just fine10:28
mithrotumbleweed: that is very weird10:58
mithrotumbleweed: did you probe the reset pins?10:58
tumbleweedno, but I can11:01
tumbleweedone sec, lunch11:04
tumbleweedjumpered with out P18, and with K3 on 1-211:18
tumbleweedI measure 3.07v at R7211:19
tumbleweedthat's with a normal firmware11:19
tumbleweedmithro: ^^11:20
olasdthat's in tolerance for the FX2; a bit on the low side but should be fine11:22
olasd(the fx2 allows 3.0-3.6V)11:22
* tumbleweed has to go out now11:39
Joelwmithro: What's in this EDID blob? Is it something that advertises Spartan-6 friendly resolutions?12:34
tpbTitle: HDMI2USB-misoc-firmware/ at master · timvideos/HDMI2USB-misoc-firmware · GitHub (at
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sab_123CarlFK, how are you doing15:41
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CarlFKanyone up for debugging poor opsis behavior?22:11
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