Hardware manual

Flash Programming
16 © PHYTEC America LLC 2009 L-718e_2
15. Locate the interrupt controller configuration code for GPI_3 beginning on line 282:
16. Change GPI_03 to GPI_04 on line 282-286.
17. Start the debugger and download the code by selecting the Download and Debug button from
the IDE toolbar
.
18. Execute the code by selecting the Go button from the debug toolbar
.
19. Again locate the Gpi03_handler function. The breakpoint set in step 11 should still be in place:
20. Press the BTN1 button on the phyCORE

Carrier Board and notice the Gpi03_handler does not
execute and the blinking speed does not change.
Because BTN1 is physically connected to GPI_3, the interrupt controller will not respond to BTN1 if
the interrupt controller is configured improperly to GPI_4.