#linuxcnc-devel | Logs for 2016-03-02

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[00:00:01] <seb_kuzminsky> bbl, time to go vote in the primaries
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[00:34:00] <jepler> andypugh: in their finite wisdom, this board has no wired ethernet
[00:34:52] <andypugh> How bizarre
[00:35:00] <jepler> yeah it's really pretty awful
[00:35:13] <jepler> but I ignored all the awful because I wanted something with 64-bit ARM aka aarch64
[00:35:22] <jepler> and now here I am wasting my time on it
[00:36:02] <andypugh> New Pi is 64-bit ARM. Probably a cheaper way to fail :-)
[00:36:05] <jepler> yeah
[00:36:13] <jepler> but they haven't bothered making a 64-bit userland for it yet!
[00:36:20] <jepler> they are just running the same arhmhf userspace
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[00:41:03] <jepler> actually the next most tempting is the upcoming 64-bit odroid, which also has a proper gigabit non-usb ethernet
[00:41:11] <jepler> and 2GB RAM
[00:42:48] <andypugh> Does LinuxCNC work with BBB? I feel I should know the answer, but I don’t
[00:44:04] <andypugh> I tried RT_PREEMT with Pi2 but it was pretty poor on latency even without the USB Ethernet thing.
[00:46:11] <jepler> andypugh: linuxcnc builds on armhf platforms
[00:46:26] <jepler> linuxcnc has no hardware drivers specific to rpi or bbb
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[00:53:59] <andypugh> Someone (Munkie) tried to develop a DMA stepgen for Pi. It looked like an OK idea but then he decided his efforts deserved money, and started a “hope to fail” Indiegogo campaign.
[00:56:13] <andypugh> Here it is. I don’t know what they were thinking, really: https://www.indiegogo.com/projects/linuxcnc-drivers-for-raspberry-pi/#/
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[01:05:31] <seb_kuzminsky> jepler, andypugh: we also have no realtime kernel for the bbb
[01:06:21] <seb_kuzminsky> yay, it's hackspace night! also, i found another end to my candle, where's a match?
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[01:13:24] <jepler> seb_kuzminsky: I think the trick is to bend the second end of the candle around to the already-lit end to light it
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[01:19:46] <andypugh> Ouroborous candle?
[01:23:26] <jepler> apparently there's no such product as a bendable candle
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[01:23:52] <andypugh> I doubt there is such a thing as a non-bendable candle
[01:24:17] <jepler> a candle marketed as bendable
[01:26:03] <andypugh> Try synonyms?
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[01:28:24] <andypugh> I am sure I have seen bendable candles. Though I realise that your interest was transient.
[01:29:32] <cradek> wow, I'd write some drivers for $1600000, too
[01:30:03] <andypugh> yeah, definite hope-to-fail there.
[01:30:14] <cradek> it's weird
[01:33:04] <andypugh> The whole text is “I doubt this will work, but give me a meeelion dollars anyway”
[01:34:34] <andypugh> I actually think the basic idea is OK, you can set up a Pi to output via DMA on an interrupt. You just need to keep refreshing the buffer intelligently.
[01:35:03] <andypugh> That’s a very specialised use of the phrase “You just need to”
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[02:08:35] <jepler> Subject: [ANNOUNCE] v4.4.3-rt9
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[13:46:14] <skunkworks> http://electronicsam.com/images/matsuura/zsensor.JPG
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[14:29:42] <seb_kuzminsky> skunkworks: that's some serious squishification on the third wire there
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[14:49:58] <skunkworks> that is a test lead. unused and those are just tubes I put over the leads
[14:57:05] <seb_kuzminsky> oh good :-)
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