memory.c

来自「自己写的TMS320C6713存储程序」· C语言 代码 · 共 40 行

#include "stdio.h"

#define EMIF_GCTL       0x01800000
#define EMIF_CE1        0x01800004
#define EMIF_CE0        0x01800008
#define EMIF_CE2        0x01800010
#define EMIF_CE3        0x01800014
#define EMIF_SDRAMCTL   0x01800018
#define EMIF_SDRAMTIM   0x0180001C
#define EMIF_SDRAMEXT   0x01800020
#define EMIF_CCFG       0x01840000;
#define SDRAM_BASE_ADDRESS    0x80000000
#define SDRAM_SIZE      0x400000

void init_emif( void );

main()
{
    int i;
    
    init_emif();
    for(i=0;i<32;i++)
    {
       *(int *)(SDRAM_BASE_ADDRESS+i*4) =i;
    }
   	puts("SDRAM Test is OK!\n") ;
   	exit(0);
}

void init_emif( void )
{
	*(int *)EMIF_GCTL     = 0x00000078;
	*(int *)EMIF_CE0      = 0xffffff93;  // SDRAM:16位位宽
	*(int *)EMIF_CE1      = 0xffffff93;  
	*(int *)EMIF_SDRAMCTL = 0x53115000;  /* SDRAM control                 */
	*(int *)EMIF_SDRAMTIM = 0x00000578;  /* SDRAM timing (refresh)        */
	*(int *)EMIF_SDRAMEXT = 0x000a8529;  /* SDRAM Extension register      */
}