src/sdram.c


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65

#include <io.h>
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>
#include "system.h"


#define msleep(msec) usleep(1000*msec);

#ifdef PIO_0_BASE
pio_write (unsigned int data)
{
  IOWR (PIO_0_BASE, 0, data);
}
#endif

void
ebb_write (unsigned int addr, uint8_t data)
{
  IOWR (ASYNC_8BIT_BUS_ADAPTER_0_BASE, addr, data);
}

uint8_t
ebb_read (unsigned int addr)
{
  return (uint8_t) IORD (ASYNC_8BIT_BUS_ADAPTER_0_BASE, addr);
}


int
main (void)
{
  int i;
  printf ("Working...\n");
  srand (12833213);
  for (;;)
    {
      printf ("W:");
      printf(" xx");
      printf(" xx");
      printf(" xx");
      for (i = 0; i < 32; ++i)
        {
          uint8_t v;
          v = rand () & 0xff;
          ebb_write (i, v);
          printf (" %02x", v);
        }
      printf ("\n");
      msleep (1000);
      printf ("R:");
      printf (" %02x", ebb_read (0));
      printf (" %02x", ebb_read (0));
      printf (" %02x", ebb_read (0));
      for (i = 0; i < 32; ++i)
        {
          printf (" %02x", ebb_read (i));
        }
      printf ("\n");
      msleep (1000);
    }
}