whitequark[m] changed the topic of #glasgow to: glasgow interface explorer · code https://github.com/GlasgowEmbedded/glasgow · logs https://freenode.irclog.whitequark.org/glasgow · discord https://1bitsquared.com/pages/chat · production https://www.crowdsupply.com/1bitsquared/glasgow · CrowdSupply campaign is FUNDED
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<gruetzkopf> did anyone build a SPI slave applet yet (unidirectional)?
<gruetzkopf> my SPI bus is too fast for any of my analysers
<gruetzkopf> (including glasgow, fifo overrun)
<d1b2> <Attie> how high is the bus utilization? try making the fifo bigger?
<gruetzkopf> 12.288MHz SPI with 100% utilisation
<gruetzkopf> /CS is high is exactly 2 out of 10 clocks, i'm currently making a mess of a copy of the uart implementation
<d1b2> <Attie> hmm, that doesn't sound like too much data... working off the UART is probably a somewhat reasonable good place to start, though a fresh implementation would probably be better
<d1b2> <Attie> are you only interested in one direction, or both CIPO / COPI signals? do you want to output data too, or just monitor?
<d1b2> <Perigoso> is there any applets i can use to generate a simple pwm signal?
<gruetzkopf> just monitor
<gruetzkopf> only one line
<gruetzkopf> the uart applet can't hit 12.288MBaud either (drops to 16) - pll time it is
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<gruetzkopf> (the wire format i'm working on, https://gruetzkopf.org/screenshot/Bildschirmfoto%20zu%202021-05-10%2020-37-25.png , slightly undersamples because i don't have a faster LA than this :|
<gruetzkopf> ( i know the format though )
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<d1b2> <Attie> @Perigoso - here is a dumb servo control applet I wrote a whole ago: https://github.com/attie/glasgow/blob/servo/software/glasgow/applet/control/servo_ppm/__init__.py
<d1b2> <Attie> it'll sweep the servo back and forth, but could be adjusted for PWM & software control fairly easily
<d1b2> <Perigoso> thanks
<d1b2> <Perigoso> I might just write a litle applet to gen a abitrary square wave, never know when it can come in handy
<d1b2> <Attie> @gruetzkopf - that feels pretty reasonable! I might be able to offer more input tomorrow if you need it
<gruetzkopf> i *believe* i only need to reverse the bit order and them i'm done
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<d1b2> <Attie> oh, nice! try shifting the bits in the other way?
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<fest> or create a new signal and use `for i in range(8): m.d.comb += outword[7 - i].eq(inword[i])`
<_whitenotifier-3> [glasgow] fabianfreyer commented on issue #180: Multiple Simultaneous Applets - https://git.io/J3jm7