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    Changing the processor fo duet wifi v1.03!

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    Duet Hardware and wiring
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    • yatinsdundefined
      yatinsd
      last edited by

      Yes all supply is there 3v 3.3v, also the 12v works fine! But clock is not generating

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      • yatinsdundefined
        yatinsd @Hedis
        last edited by

        @hedis how to check if the reset line is high?

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        • dc42undefined
          dc42 administrators
          last edited by

          The reset line is pin 83 of the processor. It's also connected to one end of R106. the other end is connected to +3.3V. So both ends of R106 should be at +3.3V.

          Have you checked for solder bridges between the pins of the processor, and for pins not soldered down properly?

          I suggest you also check that both ends of L5 and L6 are at +3.3V.

          Duet WiFi hardware designer and firmware engineer
          Please do not ask me for Duet support via PM or email, use the forum
          http://www.escher3d.com, https://miscsolutions.wordpress.com

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          • yatinsdundefined
            yatinsd
            last edited by yatinsd

            This post is deleted!
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            • yatinsdundefined
              yatinsd
              last edited by yatinsd

              This post is deleted!
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              • Hedisundefined
                Hedis
                last edited by Hedis

                Connect the negative lead of your voltage meter to gnd somewhere on the board/power supply and only move the positive lead to the desired test point when you make these measurements.

                Just make sure that you have +3.3v on the reset line, then it should be in the correct state.

                Does the computer react when you connect the USB now after the CPU swap?

                yatinsdundefined 1 Reply Last reply Reply Quote 0
                • yatinsdundefined
                  yatinsd @Hedis
                  last edited by

                  @hedis no computer does not detect the board!

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                  • yatinsdundefined
                    yatinsd @dc42
                    last edited by

                    @dc42 I have checked thoroughly no R106 on my board! When I checked PDF schematic it showed internal 100k in processor for reset. My board is duet WiFi V1.03

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                    • yatinsdundefined
                      yatinsd
                      last edited by yatinsd

                      @dc42 my reset button is not moving properly once I press it doesn't move back! Can it be the reason? The voltage on the reset button is 3.03v

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                      • yatinsdundefined
                        yatinsd
                        last edited by

                        Voltage at l5=3.3v, l6=1.2v

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                        • dc42undefined
                          dc42 administrators @yatinsd
                          last edited by dc42

                          @yatinsd said in Changing the processor fo duet wifi v1.03!:

                          Voltage at l5=3.3v, l6=1.2v

                          What do you mean by I5 and I6 ?

                          Which version Duet is it? I can't remember whether R106 has always been present or was added in a recent revision.

                          Duet WiFi hardware designer and firmware engineer
                          Please do not ask me for Duet support via PM or email, use the forum
                          http://www.escher3d.com, https://miscsolutions.wordpress.com

                          yatinsdundefined 1 Reply Last reply Reply Quote 0
                          • yatinsdundefined
                            yatinsd @dc42
                            last edited by

                            @dc42, mine is Duet wifi v1.03, I Mean the L5 & The L6 you asked me to measure if at 3.3v, in your last reply in this post.

                            dc42undefined 1 Reply Last reply Reply Quote 0
                            • dc42undefined
                              dc42 administrators @yatinsd
                              last edited by

                              @yatinsd, that's the correct voltage. i wondered whether one of those inductors/ferrite beads might have failed.

                              The NRST pin is active low, so +3V should be high enough to prevent it from resetting.

                              Perhaps you should check continuity between the data dna ground pins on the USB socket and the USB and ground pins on the microcontroller.

                              Duet WiFi hardware designer and firmware engineer
                              Please do not ask me for Duet support via PM or email, use the forum
                              http://www.escher3d.com, https://miscsolutions.wordpress.com

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                              • yatinsdundefined
                                yatinsd
                                last edited by

                                @dc42 is L6 at 1.2v correct?

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                                • dc42undefined
                                  dc42 administrators @yatinsd
                                  last edited by dc42

                                  @yatinsd said in Changing the processor fo duet wifi v1.03!:

                                  @dc42 is L6 at 1.2v correct?

                                  Yes, L6 is between VDDOUT (which is the 1.2V output from the on-chip regulator) and VDDPLL.

                                  Are you sure that the connections between the USB pins of the MCU and the data pins of the USB socket are OK?

                                  I'll try erasing firmware on one of my boards and check the clock.

                                  Duet WiFi hardware designer and firmware engineer
                                  Please do not ask me for Duet support via PM or email, use the forum
                                  http://www.escher3d.com, https://miscsolutions.wordpress.com

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                                  • yatinsdundefined
                                    yatinsd
                                    last edited by yatinsd

                                    @dc42 i have checked the voltage on v bus the voltage is 1.02v. DDP & DDM are continuous with pin 137-36 respectively. usb ground is continuous with controllers ground.

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                                    • yatinsdundefined
                                      yatinsd
                                      last edited by

                                      @dc42 did you see the clock after erasing the firmware?

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                                      • dc42undefined
                                        dc42 administrators
                                        last edited by

                                        I see the clock whether or not the firmware has been erased. It's about 200mV peak to peak on C45.

                                        Duet WiFi hardware designer and firmware engineer
                                        Please do not ask me for Duet support via PM or email, use the forum
                                        http://www.escher3d.com, https://miscsolutions.wordpress.com

                                        yatinsdundefined 1 Reply Last reply Reply Quote 0
                                        • yatinsdundefined
                                          yatinsd @dc42
                                          last edited by yatinsd

                                          @dc42 what should i check then? should ichange the clock? i have seen 0.2 mv across c45!!

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                                          • dc42undefined
                                            dc42 administrators
                                            last edited by

                                            I suggest you check the soldering of the clock pins of the MCU, to make sure they are soldered to the pad and not shorting against each other or to adjacent pads.

                                            You did fit the new MCU the right way round, didn't you?

                                            Duet WiFi hardware designer and firmware engineer
                                            Please do not ask me for Duet support via PM or email, use the forum
                                            http://www.escher3d.com, https://miscsolutions.wordpress.com

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