Thread: Free Fall

Hello, we're doing a lab where this is our task:

We have an Arduino Esplora Board and we are going to drop it so far. The goal of the lab is to have a print statement output : "Ouch! I fell %lf meters in %lf seconds"...

Here are the steps:

// Step 1 - print statement saying I'm waiting with dots.
// -- Dots depend on number of lines you're reading from esplora. "Every 10 lines"
// -- Tolerance - when acelleration is constant.


// Step 2 - When you drop it, esplora will accelerate, will then print the "!".
// -- "!" prints based on number of lines you read, you will print based off of timing you read.
// -- fixed variable , print a "." or "!" every 200 miliseconds.

Here's sample output:


Here's the code I have so far:

Code:

#DEFINE grav 9.8
#include <stdio.h>
#include <math.h>
#define TRUE 1

double freeFall(double x, double y, double z);
int seconds(int tee);




int main(void) {
	int t;
	int count = 0;
	double ax, ay, az; 	
	while (TRUE)
	{
	
	scanf("%d,%lf,%lf,%lf", &t, &ax, &ay, &az);	
	
	printf("Echoing output: %d, %lf, %lf, %lf\n", t, ax, ay, az);
	
			if(count > 0)
				{
					printf("\nOkay, I'm now receiving data");
					int count = count + 1;
				}
		
			printf("I'm waiting ");
	
			for(int i = 0; i < 10; i++)
				{
					printf(".");
				}
	
	}


	
		
	printf("Ouch! I fell %d meters in %d seconds it was: %lf\n",  seconds(t), mag(ax,ay,az)); 


	


return 0;
}


/* Put your functions here */


double freeFall(double x, double y, double z)
{
	double accel = ((x*x)+(y*y)+(z*z));
	double accel2 = sqrt(accel);
	return accel2;


	
int seconds(int tee)
{
	int seconds = tee/1000%60; // 1000 ms in 1 second.
	return seconds;
}




}

I'm a little lost now. Any ideas?