sdramtest.c

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#include "2440lib.h"
#include "def.h"
void SDRAM_test(unsigned int rambase,unsigned int ramend)
{
  unsigned int base,end,i,j,k,flag=1;
  char temp[10];
  base=rambase;
  end =ramend;
  Uart_Printf("\nTest SDRAM?(y/n)\n");
  Uart_GetString(temp);
  while(flag)
  {
  if((temp[0]=='n')||(temp[0]=='N')) flag=0;
  else if((temp[0]=='y')||(temp[0]=='Y'))
    {
      Uart_Printf("SDRAM test start!\n");
      for(k=1;k<=(1<<7);k<<=1)
        {
          Uart_Printf(".");
          j=0;
          for(i=base;i<end;i++)
            {
              ((volatile unsigned char *)base)[j++] = k;
            }
          j=0;  
          for(i=base;i<end;i++)
            {
              if(((volatile unsigned char *)base)[j++] != k)
                Uart_Printf("SDRAM error !!!"); 
            }  
         } 
       Uart_Printf("\nSDRAM test complete!");  
       flag=0;
     }  
   else
     {
       Uart_Printf("\nInvalid input!\n");
       Uart_GetString(temp);  
     }  
  }
}