/*
 * debug_demo.c
 *
 *  Created on: Jan 24, 2021
 *      Author: johnsontimoj
 */

#include <stdio.h>
#include "msp.h"

int fn1(float val);
void fn2(int * rslt);

int main(void){
    int x;
    int y;
    char aa;
    char bb;
    float one;
    float two;

    // basic variable watching
    x = 3;
    y = 4;
    aa = 'f';
    bb = 'g';
    one = 0.55;
    two = 2.222;

    // function call with void return
    printf("%i %i\n", x, y);

    // function call with return
    x = fn1(one);

    // function call with pointer
    fn2(&y);

    // scan for input
    printf("Please enter an int, a float, and a character: \n");
    scanf("%i %f %c", &x, &one, &aa);

    // for loop
    int i;
    for(i = 0; i < y; i++)
    	x = x + 1;

    // Hardware setup
    // Note: pin 5 is Port 4 bit 1
    P4->DIR = P4->DIR | 0x02;     // Output
    P4->OUT = P4->OUT & ~0x02;    // Default to low

    // Create squarewave (0.5Hz)
	i = 3;
	while(i > 0){
	   __delay_cycles(3000000);
	    P4->OUT = P4->OUT | 0x02;          // high
	   __delay_cycles(3000000);
	    P4->OUT = P4->OUT & ~0x02;         // low
	   i--;
	} // end while

    // Hardware setup
	// Using p1.7 as input
	P1->DIR = P1->DIR & ~0x80;

	// continuous read for input
	i = 0;
	while(i < 10){
		x = P1->IN & 0x80;
		y = (P1->IN & 0x80) && 0x01;
		__delay_cycles(3000000);
		i++;
	}// end while

    return 0;
}

int fn1(float val){
	if(val > 1)
		return 3;
	else if(val > 0)
		return 4;
	else
		return 5;
}// end fn1

void fn2(int * rslt){
	switch(*rslt){
	case 0:
		*rslt = 1;
		break;
	case 1:
		*rslt = 2;
		break;
	default:
		*rslt = *rslt * *rslt;
		break;
	}// end switch
}// end fn2