<electronic_eel>
attie: I don't think you are spamming the channel with any work you do on github
<electronic_eel>
and pushing stuff or updating PRs should not be limited because of the notifier
<electronic_eel>
if others consider it spammy, I think the settings of the notifier should be changed instead
<d1b2>
<Attie> ha, thanks... i'll probablly still feel self-conscious until it becomes a bit more normal for me
<d1b2>
<Attie> I was also going to say to the team - sorry if the influx of attention from me has caused any stress, it's not indented to, and please tell me if you need / want time / etc... (particularly wq / thanks for your support!)
<whitequark>
the notifier uses "notice" irc messages
<whitequark>
on irssi it shows in a different color, i think on most other clients too, though a few ignore it
<whitequark>
Attie: no problem so far, though no promises on review latency either
<whitequark>
it is likely that i'll only get to reviewing anything substantial once i get less busy with nmigen
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<gruetzkopf>
i should read over that before building a TDM bus applet
<gruetzkopf>
(channelised 8-bit-clean transport from telco equipment, at clock rated that are exact multiples of 2048000Hz, carried over four wires (TX, RX, BitClock, FrameClock (always 8kHz for the latter))
<d1b2>
<Attie> sounds good... i had a feeling there was a multi-channel "spec" for I2S, but I can't seem to find any reference to it
<d1b2>
<Attie> some parts can use a sync pulse to implement a TDM multi-channel audio interface
<d1b2>
<Attie> i was wondering about extending this to cover that, but possibly later
<gruetzkopf>
yeah, this is conceptually similar to I2S
<d1b2>
<Attie> (or feel free to read over, and take that on - especially if you have signals to work with)
<gruetzkopf>
though fixed to 8bit/sample/channel for telco stuff
<d1b2>
<Attie> this can work with 8-bit samples, and is currently limited to 2-ch / stereo, but no reason that couldn't be expanded
<d1b2>
<Attie> how many channels would you need / want?
<d1b2>
<Attie> your figures imply 32?
<gruetzkopf>
i do have buses carrying 512 channels (at 32.768Mbit/s) - but i only need access to a few at a time
<gruetzkopf>
fun thing is once you're this far you've built half a PBX
<d1b2>
<Attie> filtering channels by demand / at runtime would be neat
<gruetzkopf>
in telco applications, this is a multidrop bus
<d1b2>
<Attie> i was also thinking about bidirection, and clock/frame sync generation... but... maybe later
<d1b2>
<Attie> ah interesting
<gruetzkopf>
and the element that generates timing also connects channels to each other on the upstream/downstream data lines
<gruetzkopf>
(and to other such buses)
<d1b2>
<Attie> neat
<gruetzkopf>
another closely related variant can break each channel down into four subchannels (using only 2 bittimes/frame) - that was commonly used in stuff like ISDN NT1, ISDN phones and stuff like that (because the signalling channel only gets 16kbit/s on ISDN baserate subscriber ports)
<gruetzkopf>
because of that it (IOM-2) is also commonly present in DSPs
<gruetzkopf>
or the mototola 68302 Integrated Multiprotocol Processor, the 68360 QUICC
<d1b2>
<Attie> interesting - you mentioning the QUICC name reminded me - i was on the edge of a bit of work a while ago that used Freescale MPC83xx, though over xDSL. we used their TDM featureset to split the pipe and give a guaranteed section of bandwidth / latency to a specific application... it's good stuff
<gruetzkopf>
yup, the 68360 is the ancestor of the PowerQUICC family
<gruetzkopf>
HDLC/SDLC bitstuffing/unstuffing would also be good to push to the fpga
<gruetzkopf>
too bad HDLC max frame size (2¹⁶) is larger than usb max packet size :D
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