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/*
 * helloworld.c: simple test application
 *
 * This application configures UART 16550 to baud rate 9600.
 * PS7 UART (Zynq) is not initialized by this application, since
 * bootrom/bsp configures it to baud rate 115200
 *
 * ------------------------------------------------
 * | UART TYPE   BAUD RATE                        |
 * ------------------------------------------------
 *   uartns550   9600
 *   uartlite    Configurable only in HW design
 *   ps7_uart    115200 (configured by bootrom/bsp)
 */

#include <stdio.h>
#include "platform.h"
#include "xil_printf.h"
#include "xuartlite.h"
#include "xuartlite_i.h"

#define UART_ADDR 0x40600000
#define WIDTH 50
#define HEIGHT 50
#define PI 3.1415
#define WHITE	0
#define BLACK	255

void binarizare(unsigned char *image, unsigned char thresh)
{
	int i;
	for (i = 0; i < WIDTH * HEIGHT; i++)
		if (image[i] >= thresh)
			image[i] = WHITE;
		else
			image[i] = BLACK	;
}

int gasireCentru(unsigned char *image)
{
	long int xSum = 0;
	long int ySum = 0;
	int count = 0;
	int x, y;

	for (x = 0; x < WIDTH; x++)
	{
		for (y = 0; y < HEIGHT; y++)
		{
			if (image[x * WIDTH + y] == 255)
			{
				xSum += x;
				ySum += y;
				count++;
			}
		}
	}

	xSum /= count;
	ySum /= count;
	return xSum * WIDTH + ySum;
}
/*
float sinus(float angle)
{
	return angle
			- angle * angle * angle / 6
			+ angle * angle * angle * angle * angle / 120
			- angle * angle * angle * angle * angle * angle * angle / 5040;
}

float cosinus(float angle)
{
	return 1
			- angle * angle / 2
			+ angle * angle * angle * angle / 24
			- angle * angle * angle * angle * angle * angle / 720;
}

int gasireRaza(unsigned char *image, int xCenter, int yCenter)
{
	int radius, degrees, foundPoints, x, y;
	int maxRadius = xCenter;
	if (49 - xCenter < maxRadius) maxRadius = 49 - xCenter;
	if (yCenter < maxRadius) maxRadius = yCenter;
	if (49 - yCenter < maxRadius) maxRadius = 49 - yCenter;
	int finalRadius = -1;

	for (radius = 2; radius < maxRadius; radius++)
	{
		foundPoints = 0;
		for (degrees = 0; degrees < 360; degrees += 20)
		{
			x = (int)(sinus(degrees * PI / 180) * radius);
			y = (int)(cosinus(degrees * PI / 180) * radius);
			if (image[x * WIDTH + y] == 255) foundPoints++;
		}
		if (foundPoints > 40) finalRadius = radius;
	}
	return finalRadius;
}*/

int main()
{
    init_platform();

    print("Hello World\n\r");
    int i = 0;
    unsigned char image[WIDTH * HEIGHT];

    while(i < WIDTH * HEIGHT)
    {
        unsigned char byte = XUartLite_RecvByte(UART_ADDR);
        image[i] = byte;
        i++;
    }

    binarizare(image, 178);
    int centru = gasireCentru(image);
    int xCentru = centru / 50;
    int yCentru = centru % 50;
    char arr[] = "Centru: x =   ; y =  ; raza =  \n";
    arr[12] = (xCentru / 10) + '0';
    arr[13] =(xCentru % 10) + '0';
    arr[20] = (yCentru / 10) + '0';
	arr[21] =(yCentru % 10) + '0';
	int raza = gasireRaza(image, xCentru, yCentru);
	arr[30] = (raza / 10) + '0';
	arr[31] = (raza % 10) + '0';
	while (1)
		print(arr);

    cleanup_platform();
    return 0;
}