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bigtreetech / SKR-3

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SKR 3 ez no serial connection to computer and to tft screen #53

Open dutchronnie opened 1 year ago

dutchronnie commented 1 year ago

I have been trying for several days now to attach a new SKR 3 ez motherboard to mine CR-10 V2 printer. Without any success.

Flashing the firmware is ok, but after that i don't get a connection to the computer. I tried the Marlin Firmware deliverd by Bigtreetech 2.0.9.3.x, not any connection I tried the original Marlin Firmware 2.1.x, not any connection Tried to install klipper, also not any connection.

Then i installed marlin 2.1.x again, and now trying to connect with a TFT 28 v3.0, also no connection.

It looks like there is not a single serial port working.

Edit: I noticed something strange, maybe does it matter to this. In the file "pins_BTT_SKR_V3_0_common.h" is see no pins for the Rx and Tx pins for the TFT screen. on the SKR 3 ez pin scheme, there are the pins PA9 and PA10 for the Rx and Tx in the TFT connector. But i don't see them in the pin file.

I see many peoply who have connection problems with this board, but see no any solution. I hope somebody can tell me what to do?

When there is no solution, BigTreeTech is delivering a very bad expensive board.

dutchronnie commented 1 year ago

Solved:

When installing Marlin, edit the platformio.ini file and change: default_envs = STM32H743Vx_btt to default_envs = STM32H723Vx_btt Don't follow the instructions on youtube, bigtreeTech site, that doesn't work for a SKR 3 ez with a STM32H723VGT6 chip

spcieguy23 commented 1 year ago

I tried this solution, but when attempting to build it gives Error: Unknown environment names 'STM32H723Vx_btt

ayankemal commented 1 year ago

Hi @dutchronnie , I solve this problem today. I'm trying to solve this several days. Please try this , Go to ini folder in Marlin and follow the path. ' ini>stm32h7.ini' . Open this file and change ''DPIN_SERIAL1_RX=PA_9 -DPIN_SERIAL1_TX=PA_10'' to ''DPIN_SERIAL2_RX=PA_9 -DPIN_SERIAL2_TX=PA_10''. If you dont use TFT pin you must also change the pin number you used. (PA_10 etc.)

brandon-northcutt commented 1 year ago

Wow! I just lost a whole day thinking my CR-10s display was somehow incompatible with this SKR 3 EZ board. Then I found the serial coms were not coming up either. The problem was indeed that STM32H723Vx_btt will build fine but does not work with the STM32H723VG_btt on the SKR 3 EZ. Switched to STM32H723VG_btt and everything works. BTT, please update your user manual!