Wednesday, 2018-10-17

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cr1901_modernrohitksingh_work: Pong. I think I know why you pinged me. Openocd, right?07:04
cr1901_modernI don't have this board; but it looks fine to me07:05
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rohitksingh_workcr1901_modern: Yup! For the openocd patch review. If it looks like, can you please upvote the patch08:22
rohitksingh_work*looks fine08:22
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cr1901_modernrohitksingh_work: Looks like yours was just merged?09:36
cr1901_modernrohitksingh_work: Do you mind upvoting my patches if they look good?09:37
tpbTitle: Gerrit Code Review (at
tpbTitle: Gerrit Code Review (at
rohitksingh_workcr1901_modern: err? Wow , that was quiet fast! I just checked saw it has been merged. Thanks!09:40
rohitksingh_workcr1901_modern: sure, I'll review your patches :)09:40
cr1901_modernDo I need to request a review from you (I don't think I can lol)09:50
rohitksingh_workcr1901_modern: no need. I reviewed and upvoted your changes. They are pretty small and should be easy to merge. Specially spartan 7 support should be added asap.10:07
rohitksingh_workcr1901_modern: you should add Paul Fertser also as the reviewer10:23
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rohitksingh_work_florent_: Is the liteeth rgmii phy supposed to work fine if the speed is negotiated down to 100M?11:10
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_florent_rohitksingh_work: liteeth rgmii phy only works a 1gbps iirc.13:32
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CarlFKshorne:  why does the "uptime" always show 42 seconds?14:04
tpbTitle: HowTo LCA2018 FPGA Miniconf · timvideos/litex-buildenv Wiki · GitHub (at
rohitksingh_florent_: oh, thanks! I was wondering why it wasn't working with 100M switch14:08
CarlFKshorne: the next step (boot linux or1k on qemu) uptime shows time ticking at 1/5 real time, like it takes 10 seconds for uptime to show 2 seconds14:30
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CarlFKboth hdmi2usb and linux   works ok on ARty17:47
CarlFKgood news: all that lca stuff still works :p17:47
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shorneCarlFK: hmm, thats H2U firmware I am not sure. I can check21:20
shorneBut timing being off would be due to differences between hardware/simulator and software21:20
shorneFor linux, we set the hardware frequencey in device tree (
tpbTitle: linux-litex/or1klitex.dts at master-litex · timvideos/linux-litex · GitHub (at
shorneFor hardware, its set up PLL's something like (
tpbTitle: litex-buildenv/ at master · timvideos/litex-buildenv · GitHub (at
shorneFor sim, we set it up here,
tpbTitle: qemu-litex/cputimer.c at master · timvideos/qemu-litex · GitHub (at
shorneCarlFK: so right now Arty is 100Mhz,  and Qemu is 20Mhz21:27
shorneLinux is 100Mhz21:27
shornetime running on qemu will be off21:27
CarlFKshorne: ok, just wanted to make sure it was expected and not "what?!  that needs to be fixed."21:31
shorneCarlFK: ok, FYI for firmware the value SYSTEM_CLOCK_FREQUENCY is pulled from generated csr.h (which comes from the hardware description)21:32
tpbTitle: litex-buildenv/uptime.c at master · timvideos/litex-buildenv · GitHub (at
shornefor Harware/firmware will always be in sync21:32
shornejust sim is the odd one out, Also for Linux we should probably change the hardcoded frequency to the value from generated/csr.h21:33
CarlFKit will keep people like me from asking about it :p21:33
shorneCarlFK: if anyone wants to do a quick linux patch it should be easy21:34
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