Forum Post: RE: TM4C1294NCPDT: The UART RX interrupt can't be triggered

Hello Andrey, Do you have the pcCommInterface interrupt properly registered in startup_ccs.c? If you pause the debug, is it in the while loop or did it get caught in an ISR? For readability, I recommend chaning GPIOPinTypeUART(GPIO_PORTA_BASE, 0b00000011); with GPIOPinTypeUART(GPIO_PORTA_BASE, GPIO_PIN_0 | GPIO_PIN_1);