Write a C program such that the global integer array x with 10 elements will be filled initially. For this problem, fill it at the beginning of the code. When an interrupt comes from button 1 the ISR will be called. The ISR will calculate the global integer array y defined as y[n] = 2 ? x[n] ? x[n?1] where n is the index for the array. In fact, this is a simple filtering operation working with interrupts. In the actual application, the interrupt should come from some other source. The array should also be filled by other module or a peripheral.

Please get working C program and outline for interrupts and GPIO (non-microcontroller specific), etc.