Resolved! For some reason SysTick gets freezed in the USART_RxCpltCallback() even when systick priority is lower than USART priority, why?
Hi all, how are you?, I'm adapting some libraries for nextion HMI's to use with STM32F4 MCUs, then one of them uses the MCU timer which in my case is systick to determine if time has expired, the function is the following/* * Receive string data. *...