BIGTREETECH GTR V1.0 motherboard is a high-performance 3D printer main control board with the core controller STM32F407IGT6, which was launched by the 3D printing team of ShenZhen BigTree Technology CO.,LTD ., aiming at solving some problems existing in the motherboard market. The BIGTREETECH GTR V1.0 is the motherboard, and the BIGTREETECH M5 V1.0 is the expansion board.
Hello, Just wanted to share some findings with incorrectly labeled pins on the SKR GTR.
Z Direction Pin on "Pins" file is labeled as PC7. Z Dir on Schematic is labeled as PB7.
PC7 on pin layout diagram is INCORRECT. And when setting up firmware with these pins will cause stepper to only function in one direction.
Setting Klipper(Marlin may have issue as well) with PB7 will resolve issue.
[stepper_z] step_pin: PB8 dir_pin: !PB7 enable_pin: !PB9
Files attached for reference.