WARP Project Forums - Wireless Open-Access Research Platform

#include "xbasic_types.h"
#include "xstatus.h"
#include "xio.h"

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <math.h>
#include "xparameters.h"
#include "xuartlite_l.h"

#define NumberOfTestStructs 10

struct TestStruct
{
	int value;
};

static struct TestStruct TestStructArray[NumberOfTestStructs];

void SetPtr(struct TestStruct TestStructArray[], struct TestStruct* TestStructPtr);

int main()
{
	struct TestStruct* TestStructPtr;

	xil_printf("\n\r\n\rStarting Test Struct program");
	TestStructArray[0].value = 100;

	SetPtr(TestStructArray, TestStructPtr);

	// Try commenting/uncommenting this next line
	xil_printf("\n\rTest Struct Array [0]'s address: %d", &(TestStructArray[0]));

	// If the previous line were not called, then the address here would be different from the address in the function
	xil_printf("\n\rTest Struct Pointer's pointing to address: %d", TestStructPtr);

	// If the address in the line above is different from the address in the line above, then this next line will not return the correct value (100)
	xil_printf("\n\rTest Struct Pointer's value: %d", TestStructPtr->value);
	xil_printf("\n\r");
	while(1)
		XUartLite_RecvByte(STDIN_BASEADDRESS);
}


void SetPtr(struct TestStruct TestStructArray[], struct TestStruct* TestStructPtr)
{
	TestStructPtr = &(TestStructArray[0]);
	xil_printf("\n\rTest Struct Array [0]'s address: %d", &(TestStructArray[0]));
	xil_printf("\n\rTest Struct Pointer's pointing to address: %d", TestStructPtr);
	xil_printf("\n\rTest Struct Pointer's pointing to address's value: %d", TestStructPtr->value);
}