Dear all, I try to get the fast interrupt to run by using the GNU toolchain. In C source I defined a function with the extension __attribute__ ((interrupt("FIQ"))) as the fast interrupt service routine. Currently the program stucks at the dummy handler of the "startup.s" and I don't know how to bring the handler and the service routine together to run. Thank you, Best regards, Detlef Weidner
Thank you Dietmar, that helped me! my failure was the missing global definition in "startup.s" Best regards Detlef Weidner