Cannot get Serial Data using Rx/Tx

[troth530]

I'm using the Makerbase tft32 and it works with 328p grbl, but not with STM32 grbl.
The makerbase tft32 sends grbl data to the grbl controller through serial, typically rx/tx.
https://github.com/makerbase-mks/MKS-TFT/tree/master/MKS_TFT_CNC
Thank you!

[terjeio]

See #59 (comment), I have no idea where this is defined - search is not working for code.

[ewidance]

I think it's in the Makefile, line 102 . Remove -DUSEUSB, and it will use serial instead... (see main.c)