Resolved! Error in initializing ST-Link device. Reason: (-1) Unknown. Please check power and cabling to target.
When I tried to debug my STM32F303RE nucleo board with Truestudio , I get this messages from console:When I get this message , I was working on EXTI interrupts at register levelSTMicroelectronics ST-LINK GDB server. Version 5.1.0 Copyright (c) 2018, ...