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New kid on the block: Raspberry Pico — Parallax Forums

New kid on the block: Raspberry Pico

https://www.raspberrypi.org/documentation/pico/getting-started/
Dual core, 8 smartpins, 6 multipled memory blocks, code execution from internal and external memory, $4

Comments

  • Only four analog pins, and it only (by default) uses the voltage regulator as a reference for the analog conversions.

    There are plenty of other capable boards around, but the Pi Pico has the advantage of local suppliers, great support, and probably a huge user base. It should do well.
  • kwinnkwinn Posts: 8,692
    nutson wrote: »
    https://www.raspberrypi.org/documentation/pico/getting-started/
    Dual core, 8 smartpins, 6 multipled memory blocks, code execution from internal and external memory, $4

    Saw the post, downloaded the data sheet and other info and looked it over. Pretty good bang for the price.
  • jmgjmg Posts: 14,696
    edited 2021-01-21 21:09
    nutson wrote: »
    https://www.raspberrypi.org/documentation/pico/getting-started/
    Dual core, 8 smartpins, 6 multipled memory blocks, code execution from internal and external memory, $4

    Has anyone seen mention of what volumes that $4 is for ?

    Addit: No, wait, that's not the Chip price, that's the Pico-board price ?!

    https://www.sparkfun.com/products/17829
    Raspberry Pi Pico In stock DEV-17829 ROHS $4.00 Note: We have an order limit of 100 per customer on this product.

    Wonder what the chip will cost :)
  • Hello!
    I find it rather interesting that SPF has already committed the new processor to their special ideas for boards. This tells me that they expect developers to create and make work their ideas on the Pico, and then take them to the SPF boards.

    Very interesting.

    ---
    Mascot arrived yesterday, still has head in box.

    Strange.. There's a hoard of robots swimming to California, they plan on taking over a channel island and making it fly.
  • jmgjmg Posts: 14,696
    Hello!
    I find it rather interesting that SPF has already committed the new processor to their special ideas for boards.
    Who is SPF ?

  • jmg wrote: »
    Hello!
    I find it rather interesting that SPF has already committed the new processor to their special ideas for boards.
    Who is SPF ?

    Hmmm?
    You've already quoted them, SPF is the abbreviation for Sparkfun.
    ---
    Mascot arrived yesterday, still has head in box.

    Strange.. There's a hoard of robots swimming to California, they plan on taking over a channel island and making it fly.
  • Cluso99Cluso99 Posts: 17,774
    Interesting BUT...

    How can commercial companies compete with a charity that pays no taxes and no profits to owners?

    Their sample base board that the Pico board plugs/solders onto...
    VGA
    If you want VGA, then you need 17 pins! They steal one of the green pins from the 5+6+5 16bit, so it's 5xR + 5xG + 5xB + H + V, and the corresponding series resistors.
    Buttons x3
    Share the VGA R[0], G[0] and B[0] pins
    SD
    SD uses 4 or 6 pins if using QSPI.
    UART
    If you are only using SD in SPI mode then the 2 unused pins can be used for a UART.
    Audio
    Audio PWM uses 2 pins or I2S with an external chip uses 3 pins.
    Available pins remaining
    None!

    Of course you do have the USB port, the QSPI Flash, and the Debug port on the Pico board too.

  • pik33pik33 Posts: 1,031
    edited 2021-01-22 13:35
    If you want VGA, then you need 17 pins! They steal one of the green pins from the 5+6+5 16bit, so it's 5xR + 5xG + 5xB + H + V, and the corresponding series resistors.

    This is a designer's choice. The VGA is simply bitbanged, so you can do what you want, for example 222 as in P1 using 8 pins, nobody restrict it to 555 or 565 format

    Being far from P2 capabilities it is still a powerful board for its price. If you need something between P1 and P2, this can be a good choice. 2 "cogs", 256k RAM, 8 smart pins, 1 ADC, 26 GPIO.
  • For what I have seen on their website, it is indeed a powerful board. However, do you want one that's capable of flying your technology someplace? (Both Prop boards make me think of multiple engine aircraft,) Or do you want one that's capable of going into space, their regular Pi boards for example? Or even these Pico boards, who are everything the current family of ARM boards do, but better?

    And in fact Sparkfun saw the writing on a wall someplace, and already have boards out to use when the Pico design idea finishes.

    ----
    Mascot off on a longer weekend.

    Swimmer bots on island.
  • There's an article with someone bit-banging DVI with the pico. https://github.com/Wren6991/picodvi
  • Cluso99Cluso99 Posts: 17,774
    edited 2021-01-22 17:14
    Must be nice to sell in such large volumes...
    Did you see the pico board comes on an smt reel?
  • Compared to the similarly-priced ESP32, it's lacking in many ways: No WiFi, no Bluetooth, no floating point, no hardware integer divide, only a 32-bit hardware integer multiply, ...

    But I expect the Raspberry name will mean that it will sell in huge volumes. And the support is excellent from the outset - something that the ESP32 initially lacked.

    Past performance of the Raspberry Pi foundation suggests that there will be a Pico 2, Pico 3, Pico 4, ... coming over the next few years, no doubt fixing many of these shortcomings.

    I've bought a couple of them to try out, but they'll have to wait as I'm currently playing with much more primitive 8-bit microcontrollers. :smile:
  • pik33pik33 Posts: 1,031
    edited 2021-01-22 20:11
    No WiFi, no Bluetooth,

    The RPi philosophy: don't add something which costs and only a few people will use. Need Wifi, buy an ESP. Need Wifi and the Pico capability, buy a Pico and an ESP. Want even more and wifi, buy a P2.... and an ESP.
    no floating point

    As in P2. They added a fast library in ROM
    no hardware integer divide

    But there ARE hardware dividers there, one per core, 8 cycles.
    there will be a Pico 2, Pico 3, Pico 4,

    I think not only Pico. The Pico is a sandbox for something much bigger: Raspberry Pi 5 without Broadcom stuff onboard.

  • K2K2 Posts: 684
    The Pico is a sandbox for something much bigger: Raspberry Pi 5 without Broadcom stuff onboard.
    This is fascinating info. If the Pico's programmable I/O state machine is an indication of cleverness to come, I'm all (⌐■_■)
  • RsadeikaRsadeika Posts: 3,565
    After thinking about this RPi Pico, I think this would be a very good companion for the P1 FLiP module.

    On the FLiP side you would be picking up 4 ADC ports, a couple of cores, some, possibly accessible extra memory, plus of course all the extra IO pins. The ADC pins, on the Pico, are 0-5V, while on the P2 they are 0-3.3V. It is a lot harder to find 3.3V voltage divider breakout boards, then the 5V ones.

    I also think that on the Pico side, because it has micropython available, I think you could set up the Pico cores with multiprocessing, this I think, the Pico cores, would behave more like the P1 cogs.

    Now, with all that said, I am not sure how you would get the two to communicate. I would imagine the hard work would have to be done on the Pico side, a master, and the FLiP as a slave, not sure if it could be the other way around.

    On one of the P2 videos that I was watching, there were suggestions being made about an Edge card that would hold a FLiP module. I also think that, at some point Parallax will be coming up with an Edge breakout that will have all the IO pins available. Now, with a FLiP Edge card, which could have an RP2040 on it, that would make a heck of a combination.

    Ray
  • pik33pik33 Posts: 1,031
    Communicate with fast serial. P1 can use video shifter to transmit. Receiving will be slower as it has to be bitbanged in P1. 2040 can use its smart pins to implement a transmit/receive protocol.
  • jmgjmg Posts: 14,696
    pik33 wrote: »
    Communicate with fast serial. P1 can use video shifter to transmit. Receiving will be slower as it has to be bitbanged in P1. 2040 can use its smart pins to implement a transmit/receive protocol.

    I wonder how fast the 2040 ports can shift ?
    The std UARTS seem to be limits to SysCLK/16, which means ~ 8MHz upper limit, but the RP2040 State engine PIO can support more bits, so could pair well with P2, for a custom-length interface.
    With Xtals on both sides of a P2 <-> RP2040 link, 20b or 32b can be supported.
    22b would support 16b payloads into a 64x16b memory array.

    It's a real shame the USB side of RP2040 is only Full Speed, as there is room for a useful High Speed USB MCU.
  • pik33pik33 Posts: 1,031
    I wonder how fast the 2040 ports can shift ?

    They did HDMI, so hundreds of MHz as a transmitter. I dopn't know what fast it can receive.
  • The programmable state machine for I/O is what really piqued my interest, otherwise I wouldn't have thought too much of it.
  • Buck RogersBuck Rogers Posts: 2,028
    edited 2021-01-25 14:29

    Hello!

    Back on the Hack-A-Day site concerning the Pico, it's still engendering comments. For my efforts, the state machine behind the I/O connectors did also attract me. But, as with the Pi and certainly the two Propeller chips, the power levels are 3v3 so that would cause some upset to the new user with the Pico.


    Whole discussions exist on the Pi website regarding how to safely connect it to Logic. Whereas here we've already surmounted that issue. We shall see what does happen regarding the Pico. It has garnered an interesting following on the Sparkfun site, concerning new boards there. The A** people have made plans to create a new board in their nano form factor.

    ------

    Mascot on tea break.

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