sorear changed the topic of #riscv to: RISC-V instruction set architecture | https://riscv.org | Logs: https://libera.irclog.whitequark.org/riscv
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<josuah> what would you do with a $0.10 RISC-V microcontroller?
<josuah> that is 100 MCU for $10 :D
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<solrize> same thing you do with a 3 cent padauk or a 50 cent ARM or AVR?
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<jn> leave it in the drawer, ad infinitum
<jn> (but that's only because i already have a lot of things to hack on)
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<muurkha> josuah: for anything that doesn't have to be fast or have high analog precision, you can use it to replace pretty much any other chip
<muurkha> I guess there are some power management IC functions you can't use it for
<muurkha> josuah: what do you do with other chips?
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<josuah> solrize: that sounds like in-between the two indeed
<josuah> jn: you know me all too well
<jn> hehe :)
<josuah> <muurkha> what do you do with other chips?
<josuah> "anything that doesn't have to be fast or have high analog precision" was a good use-case I aimed for it
<josuah> what I fancy is taking existing products, turn the zillion of smart things inside to just enough components to get the same features, in more reliable/durable ways, for less cost
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<josuah> but being priced this low means that RISC-V can reach lower-end devices that were stuck with custom 8-bit firwmares
<josuah> s/firmware/cpu cores/
<muurkha> yeah, it's cheaper than any AVR8
<muurkha> but still more expensive than some of Padauk's line, which are also more capable when it comes to digital peripherals
<josuah> when shrinking enough, the MCU core might become a relatively large part?
<muurkha> I think that's the idea with Padauk
<josuah> they have some features helping to circumvent their lack of peripherals support iirc
<josuah> some multiple register banks to quickly switch across... something snarkily called FPPA
<muurkha> I meant the "FPPA" thing amounts to more capable digital peripherals than the WCH chip's STM32-clone peripherals
<josuah> muurkha: so you could play with them? How does this feels like?
<muurkha> I don't have either the WCH 32V003 *or* any Padauk chip unfortunately
<josuah> is it reminiscent of RP2040's PIO? Is it like bit-banging protocols?
<muurkha> but the Padauk FPPA idea is, as you say, just a conventional CDC-6600-style barrel processor
<muurkha> so it's sort of like the RP2040 pioasm, but you're using the 8-bit chip's normal machine code, which can only do one thing per cycle
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<muurkha> you don't get the zero-overhead looping and VLIW-like stuff you have in pioasm
<josuah> so no driving a parallel port with the same frequency as the MCU for instance
<muurkha> but you do get deterministic per-cycle task switching and thus cycle-accurate I/O and two-clock-cycle pin-to-pin latency, as I understand it
<muurkha> well, you don't have enough pins for a whole parallel port, do you? :)
<josuah> :D oops, good point
<muurkha> but I think you could probably drive a slice of one at 1/4 to 1/8 the clock speed, so maybe 2-4 MHz
<josuah> after the tiny cheap cheap MCUs, the tiny cheap cheap FPGAs: GreenPAK, giving you something like 10 LUTs (and a few analog things)
<josuah> for about $0.20 on volume
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