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[Flexi-HAL / STM32F446] HardFault / Crash on M104 P0 spindle swap with N_SPINDLE=12

Status: Open.

#301 In grblHAL/STM32F4xx;

· ranjanncc opened on Jul 24, 2026

STM32F401 + BlackPill board compiles successfully but USB CDC is not detected (Driver v260410)

Status: Open.

#299 In grblHAL/STM32F4xx;

· Althafzahra opened on Jul 12, 2026

mks_robin_nano_v3.1 failed to operate the SD card via $FM, $F

Status: Open.

#295 In grblHAL/STM32F4xx;

· chenglianshu opened on May 28, 2026

Regarding the issue of idle states for direction and step pulses

Status: Open.

#288 In grblHAL/STM32F4xx;

· kokoandqiong opened on Apr 9, 2026

I'm a GrblHAL beginner. I've always used Keil to develop STM32, so this is my first time using PlatformIO. I've been trying to compile for a few days but haven't been able to. I'm using an STM32F407ZET6. Is there a problem with my configuration?

Status: Open.

#284 In grblHAL/STM32F4xx;

· haishi14 opened on Feb 10, 2026

platformio error "no such file or directory" grbl/driver_opts.h but the grbl directory is empty

Status: Open.

#282 In grblHAL/STM32F4xx;

· lappa1 opened on Feb 7, 2026

Can the underlying code be compatible with CANOPEN to control the movement of the motor?

Status: Open.

#275 In grblHAL/STM32F4xx;

· kokoandqiong opened on Jan 17, 2026

Sienci Longboard Fails to buidl

Status: Open.

#268 In grblHAL/STM32F4xx;

· patrickjr89 opened on Dec 6, 2025

How to disable zaxis??

Status: Open.

#267 In grblHAL/STM32F4xx;

· artayasa opened on Nov 20, 2025

Moving output from Y to E01 due to burned pins on controller SKR PRO 1.2

Status: Open.

#265 In grblHAL/STM32F4xx;

· zurdoid123 opened on Nov 5, 2025

BTT OCTOPUS PRO BUILD

Status: Open.

#259 In grblHAL/STM32F4xx;

· yoroboticscolombia opened on Oct 9, 2025

MKS Robin Nano and MPG

Status: Open.

#258 In grblHAL/STM32F4xx;

· bullestock opened on Sep 21, 2025