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Forum Index : Microcontroller and PC projects : Just playing...
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| matherp Guru  Joined: 11/12/2012 Location: United KingdomPosts: 9992 |
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hitsware2 Guru Joined: 03/08/2019 Location: United StatesPosts: 715 |
FTDI to communicate and USB for power ? What is that holding the SD ? NIFTY ... Whatever You have going . Those ( Arduino and/or Micro-Circuit Python ) boards are plentifull and WAY cost effective . If You could come up with a terminal program that would hook up with those ( USB both power and communicate ) and allow the PC keyboard to interact with the program .... It would be The Cat's Meow !  my site |
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| matherp Guru Joined: 11/12/2012 Location: United KingdomPosts: 9992 |
 Yes, but CDC USB is easy but the implementation looks like it may be blocking |
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| hitsware2 Guru Joined: 03/08/2019 Location: United StatesPosts: 715 |
Groovy .... My befuddled brain was thinking of it (SD) having to mechanically spin inside  my site |
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| lizby Guru Joined: 17/05/2016 Location: United StatesPosts: 3298 |
Good thing I just accidentally discovered my Pico today--who knows how much time I would have spent looking for it. So many questions. MEMORY? CG's benchmark run on just about every mite so far? I don't remember how grainbench compares with MM2, F4, CMM2. Happy playing. PicoMite, Armmite F4, SensorKits, MMBasic Hardware, Games, etc. on fruitoftheshed |
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| bigfix Senior Member  Joined: 20/02/2014 Location: AustriaPosts: 129 |
How about this Arduino Nano RP2040 Same CPU plus networking Since the normal RPi is mostly useless for MMbasic after the Raspian OS changes, we have no more integrated networking Maybe this could become a NanoMite with integrated connectivity But I guess, without an OS supporting the networkstack, we ask for to much... Edited 2021-05-23 07:07 by bigfix |
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| robert.rozee Guru Joined: 31/12/2012 Location: New ZealandPosts: 2396 |
hi Peter, very impressive! and at a cost of around us$4 the pi-pico represents a very cheap entry point. regarding the USB, down the track one option could be to use the second core to handle USB, while the other runs mmbasic. indeed, perhaps other I/O functions could also be handed off to the second core. if you have a chance, would you be able to run the below speed test? cheers, rob :-) Print "Sieve of Eratosthenes Speed Test" Start = Timer 10 W=500:Dim F(W):P=1:A=3 20 F(P)=A:P=P+1:If P>W Then GoTo DONE 30 A=A+2:X=1 40 S=A/F(X):If S=Int(S) Then 30 50 X=X+1:If X<P And F(X)*F(X)<=A Then 40 60 GoTo 20 DONE: Elapsed = (Timer-Start)/1000 Print Elapsed " seconds" I = 0 ' statement counter J = 0 ' line counter Erase F 110 I=I+4: J=J+1: W=500:Dim F(W):P=1:A=3 120 I=I+3: J=J+1: F(P)=A:P=P+1:If P>W Then GoTo FINI 130 I=I+2: J=J+1: A=A+2:X=1 Print ,P Chr$(13); 140 I=I+2: J=J+1: S=A/F(X):If S=Int(S) Then I=I+1: GoTo 130 150 I=I+2: J=J+1: X=X+1:If X<P And F(X)*F(X)<=A Then I=I+1: GoTo 140 160 I=I+1: J=J+1: GoTo 120 FINI: Print I " statements" Print J " lines" Print I / Elapsed " statements per second" Print J / Elapsed " lines per second" |
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| matherp Guru Joined: 11/12/2012 Location: United KingdomPosts: 9992 |
 In general - seems about 30% slower than a 100MHz MM+. This is with the Basic program in RAM. Would likely be slower again if stored in the flash chip so not very impressive  Edited 2021-05-24 17:18 by matherp |
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led-bloon Senior Member Joined: 21/12/2014 Location: AustraliaPosts: 207 |
Have you seen this? Overclocking the Pico led Miss you George |
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| lizby Guru Joined: 17/05/2016 Location: United StatesPosts: 3298 |
ABC 800 single precision 0.9 1.8 6.0 5.9 6.3 11.6 19.6 2.9 ABC 800 double precision 1.2 2.2 10.0 10.6 11.0 17.8 26.4 14.4 IBM PC 1.5 5.2 12.1 12.6 13.6 23.5 37.4 3.5 Apple III 1.7 7.2 13.5 14.5 16.0 27.0 42.5 7.5 VIC-20 1.4 8.3 15.5 17.1 18.3 27.2 42.7 9.9 ZX81 in "fast mode" 4.5 6.9 16.4 15.8 18.6 49.7 68.5 22.9 Maximite 0.016 0.144 0.196 0.205 0.354 0.512 0.721 0.310 Maximite with line Nos 0.016 0.131 0.193 0.194 0.245 0.393 0.582 0.241 Maximite without line Nos 0.016 0.111 0.173 0.173 0.192 0.336 0.525 0.220 MicroMite 40MHz 0.028 0.18 0.285 0.289 0.644 0.892 1.346 0.376 MicroMite 48MHz 0.023 0.15 0.237 0.24 0.536 0.744 1.121 0.313 MX470 120MHz MMBasic 0.013 0.082 0.135 0.135 0.265 0.380 0.597 0.174 Micromite EXTREME 252MHz 0.006 0.042 0.065 0.072 0.125 0.185 0.267 0.12 STM32H7 @ 400MHz 0.002 0.02 0.034 0.037 0.062 0.086 0.129 0.059 CMM2 (400mHz-5.07.00b34) .001728 0.011814 0.019004 0.017212 0.035831 0.075413 0.02746 Pico 0.021 0.138 0.229 0.249 0.398 0.635 0.895 0.378 It looks like the Pico would make a very respectable MMBasic "starter" replacement for the 28-pin Micromite: USB programming, slightly greater speed, more pins, more memory, RTC built-in, presumably full SD card support. I bought 3 of them yesterday from the Pi Hut in the UK for $7USD including shipping to Canada. More on the MM+ scale of things with regard to ability, and a very good price point. ~ Edited 2021-05-24 22:04 by lizby PicoMite, Armmite F4, SensorKits, MMBasic Hardware, Games, etc. on fruitoftheshed |
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| robert.rozee Guru Joined: 31/12/2012 Location: New ZealandPosts: 2396 |
i'd be inclined to take more of a glass-half-full approach :-) clock CPU time SPS LPS Micromite MX150 40 MHz mips M4K 6.86 s 7015 2879 Micromite MX170 (Mk II) 40 MHz mips M4K 5.31 s 9063 3719 PicoMite for RP2040 133 MHz RP2040 3.78 s 12721 5220 Micromite MX470 (plus) 100 MHz mips M4K 2.96 s 16257 6671 compared to an E-28 (MX170 + 16F1455) the RP2040/Pico provides: - a 40% speed increase, - runtime memory (59k program and 53k variables) increases to 250k (or thereabouts) shared between program and variables, - I/O pin count increases from 19 on the MX170 to 26 (23 digital, 3 analog) on the Pico, - available flash for the interpreter is around 192k with the MX170, while with the RPi Pico this is approximately 1.7Mb (2Mb minus a 250k allowance for a saved program), - marginally higher current consumption - 90mA for the Pico running at full tilt, compared to just 32mA for an E-28 module, - TCO is us$4 for the RPi Pico, compared to us$25 to us$40 for an E-28, or us$8 for an MX170 + 16F1455 pair of chips. i would certainly see the Pico as a good candidate for a Mk III version of the MX150/MX170 line of micromites. cheers, rob :-) addendum: looks like lizby wrote the same as me, at the same time! Edited 2021-05-24 22:25 by robert.rozee |
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| twofingers Guru Joined: 02/06/2014 Location: GermanyPosts: 1518 |
I thought the F4 was the legitimate successor to the MX170.  I paid 8 EUR for it (no complaints!  ).Michael Edited 2021-05-25 00:29 by twofingers causality ≠ correlation ≠ coincidence |
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| lizby Guru Joined: 17/05/2016 Location: United StatesPosts: 3298 |
For all but the form factor. MM2 could still win out over that (and the PicoMite) if size is really decisive. And the F4 is more all-in-one. PicoMite, Armmite F4, SensorKits, MMBasic Hardware, Games, etc. on fruitoftheshed |
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| twofingers Guru Joined: 02/06/2014 Location: GermanyPosts: 1518 |
Yes, and I still love my MX170 + 2.8" LCD (Mick's Backpack 170)).  causality ≠ correlation ≠ coincidence |
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| matherp Guru Joined: 11/12/2012 Location: United KingdomPosts: 9992 |
This is better  Now running with a USB console @ 250MHz Edited 2021-05-25 01:40 by matherp |
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| robert.rozee Guru Joined: 31/12/2012 Location: New ZealandPosts: 2396 |
what is the current consumption (using serial console) at both 130MHz and 250MHz? i couldn't find a definitive answer online, with values between 20mA and 90mA mentioned. methinks i may need to pop into town tomorrow and pick up a few pico's  cheers, rob :-) |
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Plasmamac Guru Joined: 31/01/2019 Location: GermanyPosts: 570 |
Maybe wlan or sound on the second core ? Plasma |
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| led-bloon Senior Member Joined: 21/12/2014 Location: AustraliaPosts: 207 |
And then there's this... A DVI sock board for the Pico led Miss you George |
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Grogster Admin Group  Joined: 31/12/2012 Location: New ZealandPosts: 9455 |
"The MATHERP" - never sleeps. Gawd, how do you do these things?! Smoke makes things work. When the smoke gets out, it stops! |
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| hitsware2 Guru Joined: 03/08/2019 Location: United StatesPosts: 715 |
> methinks i may need to pop into town tomorrow and pick up a few pico's Pico ' s aren ' t the only ones ...... my site |
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