Hi, I just use Kinetis E series MCU. And use GPIO_demo code to test my board, I wanna use Interrupt service program to light LED for 1Hz. But never access the Interrupt service program, I check the demo program, and set NVIC_ISER and RTC_RTIE, this 's OK. However, dont using interrput program to lingt LED, and polling RTIF flag code is OK.
I dont kown how to access interrupt service program, THX for your Help.