search

bigtreetech / BIGTREETECH-SKR-mini-E3

BIGTREETECH SKR-mini-E3 motherboard is a ultra-quiet, low-power, high-quality 3D printing machine control board. It is launched by the 3D printing team of Shenzhen BIGTREE technology co., LTD. This board is specially tailored for Ender 3 printer, perfectly replacing the original Ender3 printer motherboard.
2k stars 1.98k forks source link

[BUG] Adding 5th stepper in UART mode crashes firmware #678

Open RoP09 opened 2 years ago

RoP09 commented 2 years ago

Description

I Added a 5th stepper motor driver (TMC2209 V2.0) to my SKR Mini E3 V3 using the Marlin based FW from Mrisoc .

Configuring the driver in Standalone mode works fine, but using UART mode crashes the FW after flashing resulting in an endless loop.

Steps to reproduce

Configured like below:

image

Expected behavior TMC2209 works in UART mode

Actual behavior After starting up the printer the FW ends up in endless loop

Additional Information

This happens regardless if the driver is connected or not. Non UART (Standalone) mode using the same pins works fine.

radek8 commented 2 years ago

But PD0 and PD2 pins are not RX2 and TX2. It would be more appropriate to use PD2 //RX5 PD3 //TX5

image

RoP09 commented 2 years ago

But PD0 and PD2 pins are not RX2 and TX2. It would be more appropriate to use PD2 //RX5 PD3 //TX5

Thanks for the reply! The comments are wrong... Actually I was initially trying RX2/TX2 from the TFT port on the board (since they are "real" UART pins) but that lead to the same behaviour (board reset).

But I will try with these pins as well!

(from some other thread I understood though that UART mode on those TMCs does not require a UART on the STM32 but would also work if the RX pin used is interrupt capable instead)

RoP09 commented 2 years ago

Same thing. Also results in endless loop of the FW if I connect it to PD2/PD3...

RoP09 commented 2 years ago

Update: Connected it still same as above to PD0 PD2 PD3 PD4 and PD5 now (for enable pin), and set the config differently now to mserial5 like below:

image

Now the board boots up, but then displays TMC CONNECTION ERROR on the display. The printer works fine for a couple of seconds, I can move the other steppers or home it etc. but without the 2nd Z Stepper and after some seconds it reboots again. (same issue seems to be here: https://github.com/MarlinFirmware/Marlin/issues/17098)

Something wrong with my connection?

Connected MS1 and MS2 to 3.3V, bridged both PDN pins and connected them to the RX/TX pins with 1K on TX and the rest like above. Anything I am missing?

RoP09 commented 2 years ago

Update: I now soldered also the small solder pad to enable UART on the Pin 5 like described in the thread linked in the previous post and also here https://de.aliexpress.com/item/33025720969.html?af=701906&gatewayAdapt=glo2deu.

Now I can even control the stepper from the printer menu even if the TMC connectino error is still displayed. But it seems like it is only half the speed of the other stepper now in this configuration? Strange thing is also, if I change Z2_SLAVE_ADDRESS to 0 it still works like that, seems it is defaulting to step/dir mode instead now (with half steps speed)?

-> Back to step/dir mode for now :(

radek8 commented 2 years ago

Did you use the same wiring as the other controllers?

image

radek8 commented 2 years ago

Did you enable it in the configuration.h file?

define Z2_DRIVER_TYPE TMC2209

RoP09 commented 2 years ago

Did you enable it in the configuration.h file? #define Z2_DRIVER_TYPE TMC2209

Yes exactly. If I put it as _STANDALONE, the driver works fine but not in UART mode then (with same wiring).

RoP09 commented 2 years ago

Did you use the same wiring as the other controllers?

image

Not exactly. I have no 100 Ohms before TX/RX (only the 1K resistor I have). Also DIAG pin I have not connected and CLK + PDN_UART are also not connected to GND (did not read anywhere that this has to be done).

radek8 commented 2 years ago

Not exactly. I have no 100 Ohms before TX/RX (only the 1K resistor I have). Also DIAG pin I have not connected and CLK + PDN_UART are also not connected to GND (did not read anywhere that this has to be done).

So that's okay.

radek8 commented 2 years ago

Something is wrong here. Active parameters should not be grayed out

image

RoP09 commented 2 years ago

I am not sure, think that was just a display issue of VS code here, cause normally if I don't define Z2_SERIAL_TX/RX_PIN it will give me compilation errors. If I define Z2_HARDWARE_SERIAL it seems it does not need those RX/TX pin defines and compiles fine.

radek8 commented 2 years ago

Have you also tried swapping the RX and TX pins? Sometimes the problem is that the wires to the pins are reversed. Does not connect TX to TX. RX connects to TX and TX connects to RX. The one who transmits must connect to the one who listens and vice versa.

Next, I would try to use TX2 and RX2 and on the TFT connector and define it as MSerial2

RoP09 commented 2 years ago

No did not try swapping them, but I will try that and also give it a try with MSerial2 later! Thanks for the hints!

RoP09 commented 2 years ago

Swapped PD2 and PD3 defines now without using MSerial, but only the RX / TX defines - same story (FW freezes, as written in the initial post). Next I will try to exchange the actualy RX / TX cables and use MSerial5 again...

- Additionally, I ran M112 when using MSerial (still with unswapped pins): image

RoP09 commented 2 years ago

No success. Also swapping RX TX physical pins results in same error as before...

radek8 commented 2 years ago

If it doesn't work for you in UART mode, you can remap E0 as Z2 and use the external controller for the extruder in STANDALONE mode. It's not ideal, but it's usable.

RoP09 commented 2 years ago

Thanks for the idea, at least E0 I need for LIN_ADVANCE in UART mode, but maybe another stepper (X or Y) could be remapped indeed...