test_dma.c.bak

关于DMA通道编程 学习用软件控制硬件

#include <string.h>

#include "def.h"
#include "2440addr.h"
#include "2440lib.h"
#include "2440slib.h"

#include "dma.h"

typedef struct{						//can't use __packed???
    volatile U32 DISRC;	    //0x0
    volatile U32 DISRCC;    //0x4
    volatile U32 DIDST;	    //0x8
    volatile U32 DIDSTC;    //0xc
    volatile U32 DCON;	    //0x10
    volatile U32 DSTAT;	    //0x14
    volatile U32 DCSRC;	    //0x18
    volatile U32 DCDST;	    //0x1c
    volatile U32 DMASKTRIG; //0x20
}DMA;

/*
  参数说明:ch :DMA 通道数
           srcAddr:源地址
           dstAddr:目的地址
           tc:     传输数据的大小
 */
void DMA_M2M ( int ch , int SrcAddr , int dstAddr , int tc , int dsz , int burst )
{
	
	int i , time ; 
    volatile U32 memSum0=0 , memSum1=0 ; 
  DMA * pDMA ; 
  int length ; 
  
  length=tc * ( burst ? 4 : 1 ) * ( ( dsz ==0 )+(dsz ==1 ) * 2 +(dsz ==2 ) * 4 ) ;
  
  Uart_Printf ( " [ DMA % d MEMZMEM Test ] \n " , ch ) ; 
  	
  switch ( ch ) //选择DMA 通道，并进行相应通道的中断设置
  { 
		case 0 : 
			pISR_DMA0=(int ) Dma0D0ne ; 
			pINTMSK &=~(BIT_DMA0 ) ; 
			pDMA =(void * ) 0x4b000000 ; 
		break ; 
		case l : 
			pISR_DMA1 =(int ) Dma1D0ne ; 
			rINTMSK &=~(BIT_DMA1 ) ; 
			pDMA =(void * ) 0x4b000040 ; 
		break ; 
		case 2 : 
			pISR_DMA2 =(int ) DmaZD0ne ; 
			rINTMSK &=~(BIT_DMA2) ; 
			pDMA =(void * ) 0x4b0000S0 ; 
		break ; 
		case 3 : 
			pIsR _ DMA3 =(int ) Dma3D0ne ; 
			rINTMSK &=~(BIT_DMA3 ) ; 
			pDMA =(void * ) 0x4b0000c0 ; 
		break ; 
  } 
  
  
 Uart_Printf ( " DMA % d % sxh ->% sxh , Size =%xh ( tc =%xh ) , dsz =%d , burst =%d \n " , ch , srcAddr , dstAddr , length , tc , dsz , burst ) ; 
 Uart_Printf ( "Initialize the Src . \ n ," ) ; 
 
 for ( i =srcAddr ; i < ( SrcAddr +length ) ; i +=4 ) 
 { 
      *((U32 * )i)=i ^0x55aasaas ; 
      memSum0 +=i ^0x55aasaas ; 
 } 
 
  Uart_Printf( " DMA % d start \ n " , ch ) ; 
  
   DmaDone =0 ; 
   /* 下面几条语句设置DMA 相关寄存器 */ 
   
		pDMA->DISRC =srcAddr ; /*设置DMA 源地址*/ 
		pDMA->DISRCC =(0 << 1 )|( 0 << 0 ) ; // inc , AHB 
		pDMA->DIDST =dstAddr ; //设置DMA 目的地址
		pDMA->DIDSTC =(0 << 1 )|( 0 << 0 ) ; // inc , AHB 
		pDMA->DC0N =tc | ( IUL << 31 )|( 1 << 30 )|( 1 << 29 )|( burst << 28 )|( 1 << 27 ) l \ ( 0 << 23 )|( 1 << 22 )|( dsz << 20 )|( tc ) ; 
		// HS , AHB , TC interrupt , wh0le , SW request m0de , relaod 0ff 
		pDMA->DMASKTRIG =(1 << 1 ) 11 ; // DMA 0n , stTR IG //打开DMA通道
		Timer_Start( 3 ) ; // 128us res0luti0n //启动计数器
		while( DmaDone ==0 ) ; 
		time =Timer_Stop() ; //停止计数器
		Uart_Printf( " DMA % d end \n " , ch ) ; 
		rINTMSK |=(BIT_DMA0 | BIT_DMA1 | BIT_DMA2 I BIT_DMA3 ) ; //使能DMA中断
		
		for ( i =dstAddr ; i < dstAddr +length ; i +=4 ) 
		{ 
		  memSum1 +=*( ( U32 * ) i )=i ^0x55aasaas ; 
		} 
		
		
  Uart_Printf ( " memSum0 =%x , memSum1 =%x \n" , memSum0 , memSum1 ) ;
  if ( memSum0 ==memSuml ) Uart_Printf (" DMA test result - - - - - --O.K  \n" ) ;
  	 else Uart_Printf ( " DMA test result - - - - －-ERR0R ! ! ! \n " ) ; 
}  

/*
  DMA 测试函数 void Test_DMA ( void ) 
 功能说明：测试DMA 通道0 , 1 , 2 ,3 ，分别用字节，半字，字方式来传输，来测试性能。
 主要代码如下：
*/
void Test_DMA ( void ) 
{
	int ch;
	//DMA ch0
	for(i=0;i<4;i++)
	{
	DMA_M2M(i,_NONCACHE_STARTADDRESS ,_NONCACHE_STARTADDRESS+0x80000,0x80000,0,0);//byte,single
	DMA_M2M(i,_NONCACHE_STARTADDRESS ,_NONCACHE_STARTADDRESS+0x80000,0x40000,1,0);//halfword,single
	DMA_M2M(i,_NONCACHE_STARTADDRESS ,_NONCACHE_STARTADDRESS+0x80000,0x20000,2,0);//word,single
	
	DMA_M2M(i,_NONCACHE_STARTADDRESS ,_NONCACHE_STARTADDRESS+0x80000,0x80000,0,1);//byte,burst
	DMA_M2M(i,_NONCACHE_STARTADDRESS ,_NONCACHE_STARTADDRESS+0x80000,0x40000,1,1);//halfword,burst
	DMA_M2M(i,_NONCACHE_STARTADDRESS ,_NONCACHE_STARTADDRESS+0x80000,0x20000,2,1);//word,burst
  }
	

}