sdram_test.c

Go to the documentation of this file.

/* ************************************************************************

Copyright (c) 2006, Atmel Corporation All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

1. Redistributions of source code must retain the above copyright notice,
this list of conditions and the
following disclaimer.

2. Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.

3. The name of ATMEL may not be used to endorse or promote products
derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY ATMEL ``AS IS'' AND ANY EXPRESS
OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE ARE EXPRESSLY AND SPECIFICALLY
DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT,
INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

POSSIBILITY OF SUCH DAMAGE.

************************************************************************ */

#include "sdram.h"
#include "mt481c2m32b2tg.h"

#define STK1000_SDRAM_BASE 0xB0000000 /* Using privileged mode P2 to bypass cache*/

int main( void )
{
  static sdram_info *info;
  unsigned long sdram_size, tmp, i;
  int noErrors=0;
  volatile unsigned long *sdram = (void *) STK1000_SDRAM_BASE;

  info->physical_address = STK1000_SDRAM_BASE;
  info->cols = mt481c2m32b2tg_cols;
  info->rows = mt481c2m32b2tg_rows;
  info->banks = mt481c2m32b2tg_banks;
  info->cas = mt481c2m32b2tg_cas;
  info->twr = mt481c2m32b2tg_twr;
  info->trc = mt481c2m32b2tg_trc;
  info->trp = mt481c2m32b2tg_trp;
  info->trcd = mt481c2m32b2tg_trcd;
  info->tras = mt481c2m32b2tg_tras;
  info->txsr = mt481c2m32b2tg_txsr;

  /* Calculate sdram size */
  sdram_size = 1 << (info->rows + info->cols + info->banks + 2);

  /* initialize the avr32 sdram controller */
  sdramc_init(info);

  /* initialize the external sdram chip */
  mt481c2m32b2tg_init(info);

  /* test the chip */
  for (i = 0; i < sdram_size; i++){
    sdram[i] = i;
    tmp = sdram[i];
    if (tmp != i) {
      noErrors++;
    }
  }

  return noErrors;
}

---