edma.txt

EDMA的测试代码, 关于EDMA的基本应用 包含了不同于DMA的重要部分:事件触发

/*============CSL_cfgInt()=============*/


void SCL_cfgInt()
{
}


//main.c

#include <csl.h>
#include <csl_edma.h>

#define  N   16
#pragma   DATA_SECTION(src, ".dmaMem")  //PUT SRC IN DMAMEM SECTION
#pragma   DATA_ALIGN(src, 256)  //align src

Uint16  src[N]={0xBEEF,0xBEEF,0xBEEF,0xBEEF,
                0xBEEF,0xBEEF,0xBEEF,0xBEEF,
                0xBEEF,0xBEEF,0xBEEF,0xBEEF,
                0xBEEF,0xBEEF,0xBEEF,0xBEEF};
//SRC SOURCE

#pragma DATA_SECTION(dst, ".dmaMEM")
Uint16   dst[N];
//DST IN DMAMEM SECTION


/*configure the pram of edma*/

   EDMA_Config  myconfig =
  {
      EDMA_OPT_RMK(
        EDMA_OPT_PRI_LOW,
        EDMA_OPT_ESIZE_16BIT,
        EDMA_OPT_2DS_NO,
        EDMA_OPT_SUM_INC,
        EDMA_OPT_2DD_NO,
        EDMA_OPT_DUM_INC,
        EDMA_OPT_TCINT_NO,
        EDMA_OPT_TCC_OF(0),
        EDMA_OPT_TCCM_OF(0),
        EDMA_OPT_ATINT_NO,
        EDMA_OPT_ATCC_OF(0),
        EDMA_OPT_PDTS_DEFAULT,
        EDMA_OPT_PDTD_DEFAULT,
        EDMA_OPT_LINK_NO,
        EDMA_OPT_FS_YES
        ),
       EDMA_SRC_OF(src),
       EDMA_CNT_OF(N),
       EDMA_DST_OF(dst),
       EDMA_IDX_OF(0X00000002),
       EDMA_RLD_OF(0X00000000)
    };
    //parameter of edma

   void taskFunc(void);

  void main()
  {
     CSL_init();
    
      taskFunc();
   }

   void taskFunc(void)
  {   Uint16 err= 0;
     Uint16 i;
  EDMA_Handle myedma;

  myedma=EDMA_open(EDMA_CHA_GPINT11,EDMA_OPEN_RESET);
  EDMA_config(myedma,&myconfig);
  
  EDMA_enableChannel(myedma);

  EDMA_setChannel(myedma);
// soft trigger EDMA channel

EVMDM642_wait(1000);
 
for(i=0;i<=N-1;i++)
 {  
    if(dst[i]!=src[i])
      err++;
  }
   EDMA_close(myedma);
}