HI ,

I have written following code for writing and reading from DDR3 of zynq. 
It is not displaying any outputs. What's wrong with this:

1

#include <stdio.h>

2

#include "platform.h"

3

#include "xil_printf.h"

4

#include "xil_io.h"

5

#include "xparameters.h"

6

7

#define DDR_BASEADDR 0x01000000

8

//#define IN_BASEADDR DDR_BASEADDR + 0x1000000

9

//#define TR_BASEADDR    DDR_BASEADDR + 0x2000000

10

//#define BIN_BASEADDR   DDR_BASEADDR + 0x3000000

11

12

int main()

13

{

14

   init_platform();

15

    int i,j;

16

    int val;

17

    int img[5]={1,2,3,4,5};

18

    for (i = 0; i <5; i++) {

19

      Xil_Out32(DDR_BASEADDR+(i), img[i]);

20

    }

21

    for (j = 0; j <5; j++) {

22

      val = Xil_In32(DDR_BASEADDR+(j));

23

      printf("val %d",val);

24

        }

25

    cleanup_platform();

26

    return 0;

27

}

Sai S. wrote:
> It is not displaying any outputs.
Maybe your monitor is broken?

> It is not displaying any outputs.
What happens instead?
Where do you get "no output"?
What do you expect to happen where?
What do you get instead?
Does a simple printf("Hello world!") show any output?

BTW:
Pls wrap your C code with the [c] tokens, as described in "Formatting 
options" a few lines above every text input box here.

HI
A simple "hello world" prints in console.

The program i have posted prints nothing. But it compiles without any 
error.

Sai S. wrote:
> But it compiles without any error
Debug with single step or add some printf() to find out where your 
software stucks:

1

int main()

2

{

3

   init_platform();

4

   printf("init done");

5

    int i,j;

6

    int val;

7

    int img[5]={1,2,3,4,5};

8

    for (i = 0; i <5; i++) {

9

      Xil_Out32(DDR_BASEADDR+(i), img[i]);

10

    }

11

    printf("memory written");

12

    for (j = 0; j <5; j++) {

13

      val = Xil_In32(DDR_BASEADDR+(j));

14

      printf("val %d",val);

15

    }

16

    printf("memory read");

17

    cleanup_platform();

18

    return 0;

19

}

BTW: where do you have the 0x01000000 from?

0x01000000 is my DDR3 address

If your C library is buffering stdio(which I suppose it does), output 
will only arrive at the console if you initiate a buffer flush.

Either provide at least a single "\n" to you output strings or do a 
fflush(stdoout).

thank you