I've recently created a custom board using the SAME70 based off code I wrote on the SAME70 Xplained. The code on the Xplained works well but when running on the custom board the initialization of the I2SC module cause the code to get trapped by the Dummy_Handler.
A user experienced a similar problem here https://community.atmel.com/forum/strange-program-crashes?skey=Dummy%20handler but their problem seemed to be with their own code instead of an ASF library and their solution did not fix mine. However, I am getting the same register values.
In my board_conf.h file I've oh defined CONF_BOARD_TWI0 for the Xplained header file specifically. I have never used the SRAM module available to the Xplained board so jumping outside of available memory seems unlikely to me.
Any help is much appreciated.