test_sdram.c.bak

关于DM642的外设的例程

/**********************************************************/
/*  SDRAM_TEST for TMS320C6415 video board                */
/*  Use EDMA transfer data from internal memory to        */
/*  external SDRAM and compare them.                      */
/*  parameter "error" indicates the first error occurs    */
/*  error=0xff indicates no error.                        */
/*  Author:    Beth                                       */
/*  Date:      2003,5,29                                  */
/*  Version:   1.0                                        */
/**********************************************************/
#include <csl.h>
#include <csl_dat.h>
#include <csl_edma.h>
#include "emiface0cfg.h"


/* definitions */
#define MEM_SRC     0x00008000        /* Source address */
#define MEM_DST     0x80000000        /* Destination address*/
#define EL_COUNT    0x0100            /* Element count  */

/* prototypes */
void cfg_data(void);
void submit_qdma(void);
void wait(void);
int check_data(void);

/************************************cfg_data************************************/
/* Store a data ramp in the source memory space. This data will be transferred  */
/* by the EDMA.                                                                 */
/********************************************************************************/

void cfg_data()
{
  short  *val;
  unsigned short   i = 0;

  val = (short *)MEM_SRC;
  
  for (i = 0; i < EL_COUNT; i++)
    *val++ = i;
      
} 


/***********************************submit_qdma**********************************/
/* Submit a QDMA request to transfer the data.                                  */
/********************************************************************************/
void submit_qdma(void)
{
   EDMA_Config config;

      config.opt = (Uint32)                          /* 0x21200001 */
                   ((EDMA_OPT_PRI_HIGH     << _EDMA_OPT_PRI_SHIFT   )
                  | (EDMA_OPT_ESIZE_32BIT  << _EDMA_OPT_ESIZE_SHIFT )
                  | (EDMA_OPT_2DS_NO       << _EDMA_OPT_2DS_SHIFT   )
                  | (EDMA_OPT_SUM_INC      << _EDMA_OPT_SUM_SHIFT   )
                  | (EDMA_OPT_2DD_NO       << _EDMA_OPT_2DD_SHIFT   )
                  | (EDMA_OPT_DUM_INC      << _EDMA_OPT_DUM_SHIFT   )
                  | (EDMA_OPT_TCINT_NO     << _EDMA_OPT_TCINT_SHIFT )
                  | (EDMA_OPT_TCC_DEFAULT  << _EDMA_OPT_TCC_SHIFT   )
#if (C64_SUPPORT)
                  | (EDMA_OPT_TCCM_DEFAULT << _EDMA_OPT_TCCM_SHIFT  )
                  | (EDMA_OPT_ATCINT_NO    << _EDMA_OPT_ATCINT_SHIFT)
                  | (EDMA_OPT_ATCC_DEFAULT << _EDMA_OPT_ATCC_SHIFT  )
                  | (EDMA_OPT_PDTS_DISABLE << _EDMA_OPT_PDTS_SHIFT  )
                  | (EDMA_OPT_PDTD_DISABLE << _EDMA_OPT_PDTD_SHIFT  )
#endif
                  | (EDMA_OPT_LINK_NO      << _EDMA_OPT_LINK_SHIFT  )
                  | (EDMA_OPT_FS_YES       << _EDMA_OPT_FS_SHIFT    ));

      config.src = (unsigned int)MEM_SRC;             /* 0x00008000 */
      config.cnt = (unsigned int)EL_COUNT;            /* 0x00000100 */ 
      config.dst = (unsigned int)MEM_DST;             /* 0x80000000 */
      config.idx = (unsigned int)0;                   /* 0x00000000 */

      EDMA_qdmaConfig(&config);
      
} 


/**************************************wait**************************************/
/* Wait until the transfer completes, as indicated by the status of the low-    */
/* priority queue in the queue status register (QSR).                           */
/********************************************************************************/
void wait(void)
{
   while (!(EDMA_getPriQStatus() & EDMA_OPT_PRI_HIGH));
} 

/***********************************check_data***********************************/
/* Verify that the data was properly transferred by comparing the source data   */
/* to the destination data.                                                     */
/********************************************************************************/
int check_data(void)
{
   short *src = ( short *)MEM_SRC;
   short *dst = ( short *)MEM_DST;
 
   short i = 0;
   int err = 0xff;
      
      for (i = 0; i < EL_COUNT; i++)
      {
         if (*src++ != *dst++)
           {
               err = i;
               break;
           }  
      } 
      return(err);
} 


/**************************************main**************************************/
/* Main code body.                                                              */
/********************************************************************************/
void main(void)
{
   Uint32 error;

   EMIFA_config(&emifaCfg0);
     
   cfg_data();
   submit_qdma();
   wait();
   
   error = check_data();
      
   while(1);

}