New Raspberry Pi Zero 2W

zapta

@t3p3tony said in New Raspberry Pi Zero 2W:

definitely worth giving it a go though!

How about a duet controller board with a plugged in Pi Zero for both controller and SBC functionalities?

Edit: or a Pi Zero and a minimal MCU for i/o only, basically a Klipper style RRF on a single board.

o_lampe

@pcr said in New Raspberry Pi Zero 2W:

@pcr btw someone from Germany who Likes to Test the Board ?

Ich habe heute einen Zero 2W bestellt, aber ich habe weder Duet3 oder Mini5+.
Vielleicht @cosmowave ?

English: I've ordered a Z2W, but don't have duet3 nor Mini5...maybe Cosmowave?

PCR

@pcr

pi@raspberrypi:~ $ neofetch
  `.::///+:/-.        --///+//-:``    pi@raspberrypi 
 `+oooooooooooo:   `+oooooooooooo:    -------------- 
  /oooo++//ooooo:  ooooo+//+ooooo.    OS: Raspbian GNU/Linux 10 (buster) armv7l 
  `+ooooooo:-:oo-  +o+::/ooooooo:     Host: Raspberry Pi Zero 2 Rev 1.0 
   `:oooooooo+``    `.oooooooo+-      Kernel: 5.10.63-v7+ 
     `:++ooo/.        :+ooo+/.`       Uptime: 10 mins 
        ...`  `.----.` ``..           Packages: 533 (dpkg) 
     .::::-``:::::::::.`-:::-`        Shell: bash 5.0.3 
    -:::-`   .:::::::-`  `-:::-       Terminal: /dev/pts/0 
   `::.  `.--.`  `` `.---.``.::`      CPU: BCM2835 (4) @ 1.000GHz 
       .::::::::`  -::::::::` `       Memory: 49MiB / 427MiB 
 .::` .:::::::::- `::::::::::``::.
-:::` ::::::::::.  ::::::::::.`:::-                           
::::  -::::::::.   `-::::::::  ::::
-::-   .-:::-.``....``.-::-.   -::-
 .. ``       .::::::::.     `..`..
   -:::-`   -::::::::::`  .:::::`
   :::::::` -::::::::::` :::::::.
   .:::::::  -::::::::. ::::::::
    `-:::::`   ..--.`   ::::::.
      `...`  `...--..`  `...`
            .::::::::::
             `.-::::-`

pi@raspberrypi:~ $ ls /opt/dsf/sd
filaments  firmware  gcodes  macros  menu  sys  www

PCR

@t3p3tony https://copperhilltech.com/canpico-can-fd-module-with-raspberry-pi-pico/

oliof

@pcr I am game.

o_lampe

@pcr
CAN-FD module for RasPi Pico I checked the prices of the main components: the CAN-FD module and the transceiver chip cost less than 3€
Why is this module so expensive?

PCR

@o_lampe dont Know. Could be the programming software. If Somebody would be interested in programming i would make a small Board with only the 2040 chip

o_lampe

@pcr said in New Raspberry Pi Zero 2W:

Could be the programming software

It's open source

The open-source MicroPython SDK from Canis Labs implements a sophisticated CAN API, including priority-inversion free drivers, 1μs accuracy timestamps, large buffers, and an API for triggering a logic analyzer or oscilloscope.

If you make your own CAN-board, make sure all Pico through-hole pins are still available

PCR

@o_lampe Sure First development would be a hat for the pico

o_lampe

@pcr I wonder, if it would also work for the Zero 2W? A quad-core 1GHz SBC-board with CAN-FD would be a gamechanger...

PCR

@o_lampe
Should

https://copperhilltech.com/pican-fd-zero-can-fd-hat-for-raspberry-pi-zero-with-1a-smps/

o_lampe

@pcr @T3P3Tony If we could integrate CAN-FD as PIO state machine in M0(Pico) hardware, we would only need a tranceiver...

oliof

@o_lampe is that realtime capable though?

o_lampe

@oliof I started reading about PIO statemachines yesterday, so I might got a wrong impression. They say, those state machine work independant from the processor.
I assume RRF uses them for pulse generation, too.

gloomyandy

@o_lampe said in New Raspberry Pi Zero 2W:

They say, those state machine work independant from the processor.
I assume RRF uses them for pulse generation, too.

Does RRF currently run on any hardware that has a PIO state machine?

o_lampe

@gloomyandy
It seems only the M0 processor has those state machines. The M4 (duet2) doesn't have.
I'm not even sure, if the Sam-C21 has them, although it's from the M0 family.

gloomyandy

@o_lampe I may be wrong but I think that those pio blocks are part of the rPi silicon and not part of the Arm core.

Most of these devices are a combination of a core from Arm plus manufacturer specific peripheral devices. So for instance the SPI device on an STM mcu is more than likely totally different to the SPI devices on a microchip mcu even if they both have the same Arm core. Things get a little bit more confusing though because Arm does provide some standard peripheral designs, that some manufacturers may use (or I think can even modify). So for instance the the SSP device on the LPC1768 (which provides SPI functionality) is actually an ARM PrimeCell Synchronous Serial Port (PL022).

T3P3Tony

@gloomyandy said in New Raspberry Pi Zero 2W:

pio blocks are part of the rPi silicon and not part of the Arm core.

Yes they are rpi specific

Some Atmel/Microchip processors have a similar (but much more limited) idea called "configurable custom logic" designed as hardware "glue logic".

@o_lampe said in New Raspberry Pi Zero 2W:

PIO statemachines .....I assume RRF uses them for pulse generation

We do not as they are Rpi 2040 specific. Although we have considered a range of options for pulse generation.

@o_lampe said in New Raspberry Pi Zero 2W:

If we could integrate CAN-FD as PIO state machine in M0(Pico) hardware, we would only need a tranceiver...

Yes, that would be great, anyone found an example of CAN or a similar protocol implemented on 2040 statemachines, with a reference for what bus speeds could be accommodated?

@PCR using that CAN-FD bus IC & transceiver with a Pi (either directly on a Pi 2/3/4, or using a 2040 + USB to a PC) could certainly allow for bus monitoring and protocol diagnosis, independent of using an oscilloscope so that could be interesting.

Alternatively it might allow Klipper or similar to use Duet 3 expansion boards w/o a mainboard, they could implement the Duet CAN-FD protocol on the pi and send the planned moves to each board....

o_lampe

@t3p3tony said in New Raspberry Pi Zero 2W:

Alternatively it might allow Klipper or similar to use Duet 3 expansion boards w/o a mainboard, they could implement the Duet CAN-FD protocol on the pi and send the planned moves to each board....

That would be really great for slicing&pre-processing of multi-stream gcode

T3P3Tony

@o_lampe neither of those is really specific to klipper though. slicing sits outside of the firmware used and if you are using a Pi then DSF allows you to intercept and modify the gcode.