: please initialize the SYSCLK_SOURCE in conf_clock.h file for configured source clock using fuses. . #define SYSCLK_SOURCE SYSCLK_SRC_RC16MHZ to use internal RC oscillator for clock source.
Generated on Sat Mar 5 2022 01:08:19 for MEGARF USART Example for Atmega256RFR2 Xplained Pro by 1.8.5