main_dat1_usebios.c

使用於 TI dsk6711中的很多好用的例子可以看

/*
 *  Copyright 2003 by Texas Instruments Incorporated.
 *  All rights reserved. Property of Texas Instruments Incorporated.
 *  Restricted rights to use, duplicate or disclose this code are
 *  granted through contract.
 *  
 */
/*
 *---------main_dat1_useBios.c---------
 * This example performs 1D and 2D data transfers iteratively using DAT module.
 * It also demostrates various types of 2D transfers.
 */

#include <stdio.h>
#include <std.h>
#include <swi.h>
#include <log.h>   
#include <clk.h>

#include <csl.h>
#include <csl_dat.h>
#include <csl_cache.h>

void SwiMainFunc(int arg0, int arg1);

extern far SWI_Obj SwiMain;
extern far LOG_Obj LogMain;

/*----------------------------------------------------------------------------*/
#pragma DATA_ALIGN(BuffA,128);
#pragma DATA_ALIGN(BuffB,128);
#pragma DATA_ALIGN(BuffC,128);

#define BUFFSZ 4096
static  Uint8 BuffA[BUFFSZ];
static  Uint8 BuffB[BUFFSZ];
static  Uint8 BuffC[BUFFSZ];

#pragma DATA_ALIGN(FillValue1,128);
#pragma DATA_ALIGN(FillValue2,128);
#pragma DATA_ALIGN(FillValue3,128);

static Uint32 FillValue1, FillValue2, FillValue3;
static  Uint32 success = TRUE;
static Uint32 Test1D();
static Uint32 Test2D();

/*----------------------------------------------------------------------------*/
void main() {

  /* Initialize the chip support library, required */
  CSL_init();
  
  LOG_printf(&LogMain,"<DAT>");

  /* Post main SWI to run */
  SWI_post(&SwiMain); 
  
} /* exit main and start scheduler */ 

/*----------------------------------------------------------------------------*/
void SwiMainFunc(int arg0, int arg1) {
  
  LOG_printf(&LogMain,"SwiMainFunc");
  
  success = success && Test1D();

  success = success && Test2D();
  
  LOG_printf(&LogMain,"Success = %d",success);
  LOG_printf(&LogMain,"<DONE>");
}

void printArray(Uint8 *a);

/*----------------------------------------------------------------------------*/
Uint32 Test1D() {

  volatile Uint32 XfrId,x,y,XfrId1,XfrId2;
  volatile Uint32 done = TRUE;
  
  LOG_printf(&LogMain,"Test1D");
  
  /* Clean out the buffers from cache (wrte back+invalidate) */
  CACHE_wbInvL2(BuffA, BUFFSZ, CACHE_WAIT);
  CACHE_wbInvL2(BuffB, BUFFSZ, CACHE_WAIT);
  CACHE_wbInvL2(BuffC, BUFFSZ, CACHE_WAIT);
  
  /* Before using the DAT module, we have to open it. This          */
  /* allocates a DMA channel for exclusive use by the DAT module.   */
  /* For this example, we will chose any available DMA channel. You */
  /* could just as well denote a specific channel.                  */
   DAT_open(DAT_CHAANY, DAT_PRI_HIGH, 0);
   
  FillValue1 = 0x00C0FFEE;                          /* Set the fill value          */
  FillValue2 = 0x12345678;                        /* Set the fill value          */
  FillValue3 = 0xFFFFFFFF;                        /* Set the fill value          */
  
  CACHE_wbL2(&FillValue1,4,CACHE_WAIT);            /* flush fill value from cache */
  CACHE_wbL2(&FillValue2,4,CACHE_WAIT);            /* flush fill value from cache */
  CACHE_wbL2(&FillValue3,4,CACHE_WAIT);            /* flush fill value from cache */
      
  /* loop for a while to ensure we do a large number of transfers */
  for (y=0; y<8 && done; y++) { 
  LOG_printf(&LogMain,"y= %d",y);
      
    XfrId = DAT_fill(BuffA,BUFFSZ,&FillValue1);     /* Perform the fill operation  */
    DAT_wait(XfrId);                               /* Wait for completion         */
    CACHE_wbInvL2(BuffA, BUFFSZ, CACHE_WAIT);  
	
    XfrId = DAT_fill(BuffB,BUFFSZ,&FillValue2);     /* Perform the fill operation  */
    DAT_wait(XfrId);                               /* Wait for completion         */
    CACHE_wbInvL2(BuffB, BUFFSZ, CACHE_WAIT);
        
    XfrId = DAT_fill(BuffC,BUFFSZ,&FillValue3);     /* Perform the fill operation  */
    DAT_wait(XfrId);                               /* Wait for completion         */
    CACHE_wbInvL2(BuffC, BUFFSZ, CACHE_WAIT);

    /* You will notice in the fill operations above that we waited for    */
    /* completion between them. This is because we pass the address       */
    /* of the FillValue variable to the function and this address is      */
    /* used as the source address of the DMA transfer. If the FillValue   */
    /* is modified in the middle of a fill operation, the fill will       */
    /* proceed using the new fill value instead of finishing up using     */
    /* original fill value. To prevent this, you must either wait until   */
    /* the previous fill completes or use different fill value variables. */
    
    /* You may want to view the buffers to verify the fill operations.  */
    /* Now that the buffers are initialized, let's swap buffers A and B */
    /* using buffer C as a temporary swap buffer.                       */
	XfrId = DAT_copy(BuffA,BuffC,BUFFSZ);  /* copy B -> C         */
    XfrId = DAT_copy(BuffB,BuffA,BUFFSZ);  /* copy A -> B         */
    XfrId = DAT_copy(BuffC,BuffB,BUFFSZ);  /* copy C -> A         */
    DAT_wait(DAT_XFRID_WAITALL);                      /* Wait for completion */
    	
    /* Now let's do a special series of copy operations that */
    /* weave the two buffers together.                       */
    for (x=0; x<BUFFSZ; x+=2) {
      XfrId = DAT_copy(BuffA,BuffB,x+1);
      XfrId = DAT_copy(BuffB,BuffA,x+2);
    }                                                          
  
    /* Wait until the last copy operation completes before continuing. */
    DAT_wait(DAT_XFRID_WAITALL);
    
    /* Clean out the buffers from cache (wrte back+invalidate) */
    CACHE_wbInvL2(BuffA, BUFFSZ, CACHE_WAIT);
    CACHE_wbInvL2(BuffB, BUFFSZ, CACHE_WAIT);
    
    /* Verification loop. If all of the above operations passed, */
    /* this loop will exit with 'success' to set 1.              */
    for (x=0; x<(512); x+=4) {
      if (*(Uint32*)(&BuffA[x]) != 0x0034FF78) {done=FALSE; break;}  
      if (*(Uint32*)(&BuffB[x]) != 0x0034FF78) {done=FALSE; break;}
      done = TRUE;
    }    
    
    /* Clean out the buffers from cache (wrte back+invalidate) */
    CACHE_wbInvL2(BuffA, BUFFSZ, CACHE_WAIT);
    CACHE_wbInvL2(BuffB, BUFFSZ, CACHE_WAIT);
    CACHE_wbInvL2(BuffC, BUFFSZ, CACHE_WAIT);
  }
   
  /* We're all done with the DAT module so we'll */
  /* close it. This frees up the DMA channel.    */
  DAT_close();

  return done;
}

/*----------------------------------------------------------------------------*/
Uint32 Test2D() {

  volatile Uint32   XfrId,x,i,j,y;
  volatile Uint32   done = TRUE;
  
  LOG_printf(&LogMain,"Test2D");
  
  /* Clean out the buffers from cache (write back+invalidate) */
  CACHE_wbInvL2(BuffA, BUFFSZ, CACHE_WAIT);
  CACHE_wbInvL2(BuffB, BUFFSZ, CACHE_WAIT);
  
  /* Before using the DAT module, we have to open it. This          */
  /* allocates a DMA channel for exclusive use by the DAT module.   */
  /* For this example, we will chose any available DMA channel. You */
  /* could just as well denote a specific channel.                  */
  DAT_open(DAT_CHAANY, DAT_PRI_HIGH, DAT_OPEN_2D);
  
  /* loop for a while to ensure we do a large number of transfers */
  for (y=0; y<32 && done; y++) {
  LOG_printf(&LogMain,"y= %d",y);
    /* Initialize Buffers */
    for (x=0; x<BUFFSZ; x+=4) {
      *(Uint32*)(&BuffA[x]) = x>>2;
      *(Uint32*)(&BuffB[x]) = 0xFFFFFFFF;
    }

    /* Clean out the buffers from cache (write back+invalidate) */
    CACHE_wbInvL2(BuffA, BUFFSZ, CACHE_WAIT);
  	CACHE_wbInvL2(BuffB, BUFFSZ, CACHE_WAIT);
    
    /* Loop for different block sizes */
    for (x=8; x>0; x--) {
  
      /* series of 1D to 2D copies */
      for (j=0; j<4; j++) {
        for (i=0; i<4; i++) {
          DAT_copy2d(DAT_1D2D,BuffA+(x*x*(i+4*j)),BuffB+(4*x*x*j+x*i),x,x,4*x);
        }
      }
    
      /* series of 2D to 2D copies */
      for (j=0; j<4; j++) {
        for (i=0; i<4; i++) {
          DAT_copy2d(DAT_2D2D,BuffB+(4*x*x*j+x*i),BuffA+(4*x*x*j+x*i),x,x,4*x);
        }
      }
    
      /* series of 2D to 1D copies */
      for (j=0; j<4; j++) {
        for (i=0; i<4; i++) {
          DAT_copy2d(DAT_2D1D,BuffA+(4*x*x*j+x*i),BuffB+(x*x*(i+4*j)),x,x,4*x);
        }
      } 
    
      /* copy B back to A */
      XfrId = DAT_copy(BuffB,BuffA,4*x*x*4);
    }
  
    /* wait for final transfer to complete before checking results */
    DAT_wait(XfrId);
  	
  	CACHE_wbInvL2(BuffA, BUFFSZ, CACHE_WAIT);
  	CACHE_wbInvL2(BuffB, BUFFSZ, CACHE_WAIT);
    
    /* Check results */
    for (x=0; x<BUFFSZ; x+=4) {
      if (*(Uint32*)(&BuffA[x]) != x>>2) {done = FALSE; break;}
    }    

    /* Clean out the buffers from cache (write back+invalidate) */
    CACHE_wbInvL2(BuffA, BUFFSZ, CACHE_WAIT);
  	CACHE_wbInvL2(BuffB, BUFFSZ, CACHE_WAIT);
  }  

  /* We're all done with the DAT module so we'll */
  /* close it. This frees up the DMA channel.    */
  DAT_close();

  return done;
}