#include<stdio.h>
#include<stdlib.h>

// Uncomment this if when you copy this code to run it on HW
//#define RUN_ON_HW

#ifdef RUN_ON_HW
#define Serial1 Serial
#endif

void myPrint(char* fnName, unsigned int result);

// Define external assembly function
extern "C" { 
 bool chk_eq_asm_fn(int, int);
 bool chk_unsigned_hs_asm_fn(unsigned int, unsigned int);
 bool chk_signed_lt_asm_fn(int, int);
}

// the setup function runs once when you press reset or power the board
void setup() {
  // initialize digital pin LED_BUILTIN as an output.
  Serial1.begin(9600);
  pinMode(LED_BUILTIN, OUTPUT);
}

// the loop function runs over and over again forever
void loop() {
  bool result;
  unsigned uint_a = 0xFFFFFFFF;
  unsigned uint_b = 0xFFFFFFFE;
  int int_a = 8;
  int int_b = -6;

  if (result = chk_eq_asm_fn(100, 101)){
    Serial1.println("The values are equal.");
    myPrint("chk_eq_asm_fn()", result);
  }
  else {
    Serial1.println("The values are not equal.");
    myPrint("chk_eq_asm_fn()", result);
  }

  if (result = chk_unsigned_hs_asm_fn(uint_a, uint_b)){
    Serial1.println("uint_a is higher or same as uint_b.");
    myPrint("chk_unsigned_hs_asm_fn()", result);
  }
  else {
    Serial1.println("uint_a is lower than uint_b.");
    myPrint("chk_unsigned_hs_asm_fn()", result);
  }

  if (result = chk_signed_lt_asm_fn(int_a, int_b)){
    Serial1.println("int_a is lower than int_b.");
    myPrint("chk_signed_lt_asm_fn()", result);
  }
  else {
    Serial1.println("int_a is higher or equal than int_b.");
    myPrint("chk_signed_lt_asm_fn()", result);
  }

  digitalWrite(LED_BUILTIN, HIGH);
  delay(1000); 
  digitalWrite(LED_BUILTIN, LOW);    
  delay(1000); 

} // end of loop()

void myPrint(char* fnName, unsigned int printVal){
  Serial1.print("The value returned from the assembly fn ");
  Serial1.print(fnName);
  Serial1.print(" : "); Serial1.println(printVal);
  
  Serial1.print("The value returned from the assembly fn ");
  Serial1.print(fnName);
  Serial1.print(" in Hex: 0x"); Serial1.println(printVal, HEX);  
  Serial1.println(); // print an empty line
} // myPrint(char*, int)