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    Duet3/pi DCS is unavailable after wiring 24V

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    • fractalengineerundefined
      fractalengineer
      last edited by fractalengineer

      Ok guys I'm just absolutely confused; the RPi 4 that worked last time on the standard image SD card won't connect to Wifi with chris's image no matter if I redo the wpa supplicant file.

      It is not a Pi4 hardware issue because it works just fine with my other SD card flashed with Octopi

      I'm rebuilding an image from scratch following this guide again; don't know what else to do at this point.

      Duetpi lite this time; as if it changed anything

      I'll report back once I get the new image setup on the pi4 with wifi working and everything up do date

      Thanks for the help

      Railcore II ZL

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      • A Former User?
        A Former User
        last edited by A Former User

        Send me a message if you'd want a second pair of eyes on it. If you can connect the Pi to wired Ethernet and provide remote access (e.g. ngrok) I can take a stab at it.

        prime suspect is missing country code in the config or somehow strange whitespace in the config preventing it from being parsed.

        this was one of the more detailed guides I could find to share https://wiki.archlinux.org/index.php/wpa_supplicant

        fractalengineerundefined 1 Reply Last reply Reply Quote 1
        • fractalengineerundefined
          fractalengineer @A Former User
          last edited by

          @bearer thanks;

          Well it's all fixed now with the new image...the wifi connection it is...Still unable to connect to DCS

          On a separate pi...

          On a new board...

          Maybe we can try that pin by pin connection to double check the issue wasn't the ribbon?

          I can go buy jumpers tomorrow; how many we need?

          Railcore II ZL

          A Former User? 1 Reply Last reply Reply Quote 0
          • A Former User?
            A Former User @fractalengineer
            last edited by

            @fractalengineer said in Duet3/pi flashing Diag LED after wiring 24V DCS is unavailable:

            how many we need?

            Minimum 9, but didn't you get a new cable?

            fractalengineerundefined 1 Reply Last reply Reply Quote 0
            • fractalengineerundefined
              fractalengineer @A Former User
              last edited by

              @bearer no I think I got a refurb; there was only the board and SD card in it

              Railcore II ZL

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              • chrishammundefined
                chrishamm administrators @Danal
                last edited by chrishamm

                @Danal That error occurred because SPI wasn't enabled at that point, hence no /dev/spidev.0.0. It's always possible to define module options in /etc/modprobe.d, that doesn't require the driver(s) to be loaded.

                It must be the connection from the Pi to the Duet 3 (ribbon cable?). The SPI link uses pins 19-24 (see https://pinout.xyz/pinout/pin22_gpio25#) so I'd once more check continuity between these pins on both sides. The error you see in the log without any extra comment (more verbose in v2.1.0) means that no signal could be transferred over pin 22 (BCM25). DSF expects this pin to be high when it starts.

                Duet software engineer

                A Former User? fractalengineerundefined 2 Replies Last reply Reply Quote 1
                • A Former User?
                  A Former User @chrishamm
                  last edited by

                  @chrishamm said in Duet3/pi flashing Diag LED after wiring 24V DCS is unavailable:

                  It must be the connection from the Pi to the Duet 3

                  of curiosity what does DCS say if it gets a response, but the wrong due to say wrong firmware or spi clock?

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                  • chrishammundefined
                    chrishamm administrators
                    last edited by chrishamm

                    It's also worth starting DCS with -l debug to see a few more details. If the SPI clock is too high, you usually see warnings about failed transfers and/or checksum errors.

                    Duet software engineer

                    A Former User? 1 Reply Last reply Reply Quote 1
                    • A Former User?
                      A Former User @chrishamm
                      last edited by A Former User

                      @chrishamm said in Duet3/pi flashing Diag LED after wiring 24V DCS is unavailable:

                      It's also worth starting DCS with -l debug to see a few more details. If the SPI clock is too high, you usually see warnings about failed transfers and/or checksum errors.

                      -l debug shows the difference, no difference without it.

                      #with 22 low
                      pi@raspberrypi:~ $ /opt/dsf/bin/DuetControlServer -l debug
                      [debug] Lost connection to Duet
                         System.OperationCanceledException: Timeout while waiting for transfer ready pin ...
                      [error] Duet is not available
                      
                      #with 22 high
                      pi@raspberrypi:~ $ /opt/dsf/bin/DuetControlServer -l debug
                      [debug] Lost connection to Duet
                         System.OperationCanceledException: Board is not available (no header) ...
                      [error] Duet is not available
                      

                      Maybe change the first to Duet is not ready?

                      edit: sudo wasn't needed (at that point in starting up at least)
                      edit2: whops, wasn't testing the latest version, error changed to fatal, but same string.

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                      • chrishammundefined
                        chrishamm administrators
                        last edited by

                        Yes I thought it already showed more details so I'm going to improve that in v2.1.1.

                        Duet software engineer

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                        • fractalengineerundefined
                          fractalengineer @chrishamm
                          last edited by

                          @chrishamm I just checked continuity once more; ever pin beeps from one board to the other.

                          Also checked for any short to ground; it’s all clear with the multimeter.

                          I’ll try wiring pin by pin using bridges; really can’t figure out what else to do

                          Unless the previous duet fried the pi4 too...

                          Railcore II ZL

                          A Former User? 1 Reply Last reply Reply Quote 0
                          • A Former User?
                            A Former User @fractalengineer
                            last edited by A Former User

                            @fractalengineer said in Duet3/pi flashing Diag LED after wiring 24V DCS is unavailable:

                            really can’t figure out what else to do

                            if you've got a steady hand you could measure the voltage on pin 22 with the Duet running (before and after starting DCS) and then cross refrene with the output of running DSC with -l debug to at least verify if the Pi is reading pin 22 correctly.

                            see next post instead:

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                            • A Former User?
                              A Former User
                              last edited by A Former User

                              Hold off on that; not sure why loopback testing didn't occur to me a week ago ... but:

                              https://github.com/rm-hull/spidev-test

                              combine with wiringpi's gpiocommand and two jumpers to do full (or 80%? as SCK isn't tested) diagnostic on the rPi.

                              place jumper over 22-24 and 19-21, then run commands as shown, compare to output below.
                              9ff41e90-9272-4588-bceb-75e5acf19c86-image.png
                              (Quick copy/paste to get the spidev-test tool and wiringpi):

                              sudo apt install -y git wiringpi
                              git clone https://github.com/rm-hull/spidev-test ~/spidev-test
                              cd ~/spidev-test
                              gcc spidev_test.c -o spidev_test
                              

                              Commands to run:

                              RDY=22 CS=24 ; { 
                              gpio -1 mode $CS out
                              gpio -1 mode $RDY in
                              gpio -1 write $CS 1 && echo "(Pin RDY/$RDY) `gpio -1 read $RDY` should equal `gpio -1 read $CS` (Pin CS/$CS)"
                              gpio -1 write $CS 0 && echo "(Pin RDY/$RDY) `gpio -1 read $RDY` should equal `gpio -1 read $CS` (Pin CS/$CS)"
                              { ~/spidev-test/spidev_test -v -s 8000000 -D /dev/spidev0.0 && echo RX should equal TX. ;} | tail -n3 | cut -b-100 ;}
                              

                              What output should look like:

                              (Pin RDY/22) 1 should equal 1 (Pin CS/24)
                              (Pin RDY/22) 0 should equal 0 (Pin CS/24)
                              TX | FF FF FF FF FF FF 40 00 00 00 00 95 FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF F0 0D
                              RX | FF FF FF FF FF FF 40 00 00 00 00 95 FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF F0 0D
                              RX should equal TX.
                              

                              Repeat with wires jumpering the far side of the ribbon cable if test with jumpers on the rPi is passed.
                              (Print quality comments can be addressed to Tiertime pending full Duet conversion of the Up Mini 2)

                              1 Reply Last reply Reply Quote 1
                              • Danalundefined
                                Danal
                                last edited by

                                I don't know about the "W" part... but I'll take a look.

                                I can also spiff it up so that its output is very clear for an "end user", in the Duet environment.

                                Delta / Kossel printer fanatic

                                A Former User? 1 Reply Last reply Reply Quote 0
                                • A Former User?
                                  A Former User @Danal
                                  last edited by

                                  @Danal wrong topic?

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                                  • Danalundefined
                                    Danal
                                    last edited by Danal

                                    I thought a post said: "If a C Wizard happens along"... and then got edited... the request being to make spidev_test more duet specific, easier to interpret. ?

                                    Hopefully, because I did take a look.

                                    I am not a Wizard, but:

                                    ./DuetTestSPI
                                    spi mode: 0x0
                                    bits per word: 8
                                    max speed: 8000000 Hz (8000 KHz)
                                    TX | FF FF FF FF FF FF 40 00 00 00 00 95 FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF F0 0D  | ......@....�..................�.
                                    RX | FF FF FF FF FF FF 40 00 00 00 00 95 FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF F0 0D  | ......@....�..................�.
                                    Loopback on pins 19-21, SPI MOSI MISO tested successfully.
                                    All tests passed, SPI should work for Duet 3 <> Raspberry Pi.
                                    

                                    (removed jumper)

                                    ./DuetTestSPI
                                    spi mode: 0x0
                                    bits per word: 8
                                    max speed: 8000000 Hz (8000 KHz)
                                    TX | FF FF FF FF FF FF 40 00 00 00 00 95 FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF F0 0D  | ......@....�..................�.
                                    RX | 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  | ................................
                                    Send and receive buffers do not match! 
                                    Check jumpers on pins 19-21; if they are correct this machine has an SPI problem. 
                                    Aborted
                                    

                                    Much clearer messages, etc. This is 1/2 of your suggestion above, I'll do the 22-24 part in a few min, and then post a link.

                                    Delta / Kossel printer fanatic

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                                    • A Former User?
                                      A Former User @Danal
                                      last edited by A Former User

                                      @Danal said in Duet3/pi flashing Diag LED after wiring 24V DCS is unavailable:

                                      I thought a post said: "If a C Wizard happens along"... and then got edited...

                                      it did, but "W" didn't make much sense; anyways, as DSF depends on wiringpi anyways figured less effort than forking the spi tools. (and easier to change if other boards have different gpio mapping)

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                                      • Danalundefined
                                        Danal
                                        last edited by

                                        Understood... it was obscure. Perhaps should have said "not a Wiz, but"

                                        Delta / Kossel printer fanatic

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                                        • Danalundefined
                                          Danal
                                          last edited by Danal

                                          OK, here you go, a 'tester' for SPI on a Pi, to see if it is hardware OK to run with a Duet.

                                          Installation:  Either:
                                            git clone https://github.com/DanalEstes/DuetTestSPI
                                          or, if you want just the binary:
                                            wget https://github.com/DanalEstes/DuetTestSPI/raw/master/DuetTestSPI
                                            chmod 744 DuetTestSPI
                                          
                                          Run
                                          Place a jumper on Pi GPIO pins 22-24 and 19-2, then:
                                          
                                          ./DuetTestSPI
                                          
                                          All messages should be self explanatory.
                                          

                                          Delta / Kossel printer fanatic

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                                          • Danalundefined
                                            Danal
                                            last edited by

                                            @bearer

                                            I invoked the great architectural pattern of "reuse" and put your jumper pic on the github for this. I will pull it if you'd rather I not use it.

                                            Delta / Kossel printer fanatic

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