#include <stdio.h>

#define MAGIC_ONE 0xFD866E14
#define MAGIC_TWO 0x4556494C
#define MAGIC_RESPONSE 0xDEADC0DE


void ControlLoop(unsigned int *share)
{
	unsigned int addr, reqResp;
	while (1) {
		reqResp = share[6];
		printf("Physical Address:> ");
		scanf("%x", &addr);
		share[8] = addr;
		share[7] = reqResp;

		int iters = 0;
		while (iters < 500) {
			if (share[6] != reqResp)
				break;
			usleep(5000);
			iters++;
		}

		if (iters == 500)
			return;

		unsigned int value = share[9];
		printf("Value at Physical Address: %x --- %x\r\n", addr, value);
	}
}

int main()
{
	unsigned int *arr = (unsigned int*)aligned_alloc(4096, 16384);
	if ((unsigned long)arr % 4096) {
		printf("Failed to get 4kb alignment %x\n", (unsigned int)arr);
		return 0;
	}

	arr[0] = MAGIC_ONE;
	arr[1] = MAGIC_TWO;
	arr[2] = arr[0] ^ arr[1];
	arr[3] = arr[2] + 64;


	printf("myBuffer: 0x%x\r\n", (unsigned int)arr);
	unsigned int iters = 0;
	while (1) {
		usleep(10000);
		iters++;

		if (arr[5] == MAGIC_RESPONSE) {
			printf("Found response. myBuffer physical address: 0x%x\r\n", arr[4]);
			ControlLoop(arr);
			printf("Lost communicationr\r\n");
			break;
		}
		else if (iters % 50 == 0) {
			printf("No response yet\r\n");
		}
	}

	arr[0] = 0;

    return 0;
}