I am new to STM32, I am using Nucleo STM32F446RE board and programming in C in the program Keil, and I am facing an issue that I can't resolve, trying to download my program, whenever I tryy to download it it says " no target connected" then another message appears say " Flash download failed- target DLL has been cancelled"
when I went into the 'Debug' tab, selected 'ST-Link Debugger' then the settings tab under SW Device it says Error , No target connected
Does anyone know how to resolve this issue?
