/********************************************
*  
*	DSP controlling code for QDMA
*
********************************************/

#include <stdio.h>
#include <c6x.h>
#include "c6713dsk.h"
#include "dsp_usb.h"

#define Uint16  unsigned int
volatile unsigned char flag_qdma=0;

void QDMA_TRANSDATA(unsigned int mySRC,unsigned int myDES,unsigned int num,unsigned char bIr,unsigned int OptCode);
unsigned short *shuzu=(unsigned short *)0x80000000;

volatile Uint16 * LEDSHOW = (Uint16 *)0xb020003c;

/*       QDMA比普通EDMA效率更高
一: QDMA_TRANSDATA函數是完成內存中數據塊(數組shuzu[])到外部RAM之間的數據雙向傳輸的例子
    你要自己通過看文檔SPUR190D.PDF看懂其中的參數"0x29380001"每一位表示的東西,否則你還是不會DMA.
二: 數組shuzu[]實際上也是在訪問外部RAM,自己看看吧
三: 要自己明白為啥寫EMIF_CE0 = 0x90在C6X.C文件中.

羅嗦: 你在運行下面程序時要打開VIEW-MEMORY窗口監視結果,確認OK. 注意選擇合適的地址和數據類型

最后  你自己應該能獨立調通點東西,DSP很繁雜,不是誰什么都會
*/


int main()
{ 
	int i,j;
	int tmpA,tmpB;
	
	 unsigned short  innerbuf[512];
	
    Sys_Initialize();
   
    
    PLL_Init();
    for(i=0;i<512;i++) shuzu[i]=0;     //CLEAR EXT RAM
    for(i=0;i<512;i++)   innerbuf[i]=i;
									/*WRITE DATA TO EXT-RAM*/
	 QDMA_TRANSDATA((int)(&innerbuf),0x80000000,512,1,0x29380001);
  	 //delay_msec(2);
  	 for(i=0;i<512;i++)   innerbuf[i]=0;
  	 QDMA_TRANSDATA(0x80000000,(int)(&innerbuf),512,1,0x29380001);//READ FROM EXT-RAM
 	 delay_msec(2);	 
    
  
  
   
    	while(1)
  	{  	  	
	  	for(i=0;i<1000;i++)
	  	  for(j=0;j<1800;j++);
	  	*LEDSHOW=0x7;
	  	for(i=0;i<1000;i++)
	  	  for(j=0;j<1800;j++);
	  	  *LEDSHOW=0x0;
	  	//*(char *)0xb020003c=0x0;	  	
  	};
    
    
    
    
} 	   




void QDMA_TRANSDATA(unsigned int mySRC,unsigned int myDES,unsigned int num,unsigned char bIr,unsigned int OptCode)
{
	unsigned int  tmp;
	
	*(unsigned volatile int *)QDMA_SRC = mySRC;
	*(unsigned volatile int *)QDMA_CNT = num;
	*(unsigned volatile int *)QDMA_IDX = 0x00000000;
	*(unsigned volatile int *)QDMA_DST = myDES;
	*(unsigned volatile int *)QDMA_S_OPT= OptCode;
	
	tmp=*(unsigned volatile int *)CIPR;
	
	while(!(tmp&0x100))tmp=*(unsigned volatile int *)CIPR;
	
	tmp=tmp&0xefff;
	
	*(unsigned volatile int *)CIPR=tmp;
}