/* Write an ARM assembly function that takes one input parameter, 
performs a bitwise NOT operation on it, 
and returns the result to a calling C program. */
#include <stdio.h>
#include <stdlib.h>
extern "C"{
   unsigned int bitwise_not(unsigned int x); 
}

void setup() {
  Serial1.begin(9600); //initialising the serial port.
}

int main()
{
  unsigned int x,result;
  printf("Enter the value: ");
  scanf("%d",&x);
  printf("%d\n",x); //to make sure it shows up on the serial monitor.
  
  result = bitwise_not(x);
  printf("\nResult : %d \n",result);
}