edma.c

该代码实现了 两次下载法在dspC6713平台上 烧写flash的操作过程

/*
 *  Copyright 2002 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.
 *  
 */
/* "@(#) XDAS 2.4.14 12-06-02 (xdas-d11.16)" */
/*
 *  ======== edma.c ========
 */

//#include <std.h>

#include "EDMA.h"
#include "INTR.H"
#include "c6711dsk.h"
#define Uns unsigned int

/*
 *  ======== EDMA_init ========
 *  Initialise EDMA Controller
 */
void EDMA_init(void)
{
    /* General EDMA Initialisation */
    *(volatile Uns *) EER = 0x0010;     /* enable external int 4 to edma */
    *(volatile Uns *) ECR = 0xffff;     /* Clear all pending events */
    *(volatile Uns *) CIER = 0x0350;    /* enable edma int 4 6 8 9 */
    *(volatile Uns *) CIPR = 0xffff;    /* Clear all pending Queued EDMA ints */
	*(volatile Uns *) CCER = 0x0000; 
    /*----------------------------------------------------------------------*/
//	*(volatile Uns *) ESR = 0x0010;	
//	*(unsigned volatile int *) ECR = 0xffff;
//	*(unsigned volatile int *) EER = 0xffff;
//	*(unsigned volatile int *) CIPR = 0xffff;
//	*(unsigned volatile int *) CIER = 0xffff;
    /*----------------------------------------------------------------------*/
    /* Enable Events and Interrupts                                     */
    //*(volatile Uns *) CIER = 0x0010;    /* Enable Rx/Tx Complete Interrupts */
    //*(volatile Uns *) ECR = 0xffff;     /* Clear all pending events */
}
//|  31-28     |    27-24   |   23 - 20   | 19-16 |15-12|12-8|7-4|3-0|         
//OPT 31-29  28-27 26 25-24  23 22-21  20   19-16   15    -   2   1 0
//BIT  PRI   ESIZE 2DS SUM  2DD  DUM  TCINT  TCC  rsvd           LINK FS
//
void EDMA4_channel(unsigned int destibuff_addr)/*0060- 0077*/
{
	*(volatile Uns *) ECR = 0xffff;
    *(volatile Uns *) EDMA_EVENT4_OPT   = 0x21340001;//0x28710000;   // TCC = 1 for Receive
    *(volatile Uns *) EDMA_EVENT4_SRC   = 0xb000F7E0;//0xB0000000;//McBSP0_DRR;   // Source = McBSP Rcv  
    *(volatile Uns *) EDMA_EVENT4_CNT   = 0x000001f4;//1F5 Count = not known yet
    *(volatile Uns *) EDMA_EVENT4_DST   = destibuff_addr;// 0x0;          // Dst = not known yet
    *(volatile Uns *) EDMA_EVENT4_IDX   = 0x00000000;    // 4 byte offset (load low 16)
    *(volatile Uns *) EDMA_EVENT4_LNK   = 0x00000000;    // No auto reload parameters
    
}
void EDMA6_channel(unsigned int src_addr,unsigned int dst_addr)/*0090-00a7*/
{
	*(volatile Uns *) ECR = 0xffff;
    *(volatile Uns *) EDMA_EVENT6_OPT   = 0x25360001;   //0x25360001,0x28710000;   // TCC = 1 for Receive
    *(volatile Uns *) EDMA_EVENT6_SRC   = src_addr;   // Source = McBSP Rcv  
    *(volatile Uns *) EDMA_EVENT6_CNT   = 0x003F0010;   //0x003F0010, 3F=63行数  10=16  (*4BYTE）单位是双字
    *(volatile Uns *) EDMA_EVENT6_DST   = dst_addr;		//  Dst = not known yet
    *(volatile Uns *) EDMA_EVENT6_IDX   = 0x07C00000;   //fc0,0x07FC0000 0x7fc=0x800-4(0x800=2K)
    *(volatile Uns *) EDMA_EVENT6_LNK   = 0x00000000;   //0x00100000 reload 
}
void EDMA8_channel(unsigned char framecount)/*00c0-00d7*/
{
	*(volatile Uns *) ECR = 0xffff;//temp1=temp1&0x07;
    *(volatile Uns *) EDMA_EVENT8_OPT   = 0x41380001;//0x28710000;   // TCC = 1 for Receive
    *(volatile Uns *) EDMA_EVENT8_SRC   = 0x80500000+0x800*framecount;//0xB0000000;//McBSP0_DRR;   // Source = McBSP Rcv  
    *(volatile Uns *) EDMA_EVENT8_CNT   = 0x000001f4;          // Count = not known yet
    *(volatile Uns *) EDMA_EVENT8_DST   = 0xa0004000+0x800*(framecount&0x07);// 0x0;          // Dst = not known yet
    *(volatile Uns *) EDMA_EVENT8_IDX   = 0x00000000;    // 4 byte offset (load low 16)
    *(volatile Uns *) EDMA_EVENT8_LNK   = 0x00000000;    // No auto reload parameters
    
}
void EDMA9_channel()/*00d8-00ef  80504000 */ 
{
	*(volatile Uns *) ECR = 0xffff;
    *(volatile Uns *) EDMA_EVENT9_OPT   = 0x41390001;//0x28710000;   // TCC = 1 for Receive
    *(volatile Uns *) EDMA_EVENT9_SRC   = 0x80520000;//0xB0000000; /*128k*/  
    *(volatile Uns *) EDMA_EVENT9_CNT   = 0x00001000;          // Count = not known yet
    *(volatile Uns *) EDMA_EVENT9_DST   = 0xa0004000;// 0x0;          // Dst = not known yet
    *(volatile Uns *) EDMA_EVENT9_IDX   = 0x00000000;    // 4 byte offset (load low 16)
    *(volatile Uns *) EDMA_EVENT9_LNK   = 0x00000000;    // No auto reload parameters
    
}
/*
void Changeramdata(int k)
{
 unsigned int buff= 0x80d000000;
 unsigned int i;
 	for(i=0;i<0x10000;i++)
		*(volatile Uns *)(buff+4*i)=i+k;
}
 *  ======= EDMA_rxStart ========
 */
void EDMA_Set(unsigned int channel)
{
	unsigned int temp;
	temp=0x0001;
	temp<<=channel;	
    *(volatile Uns *) EER = 0x0000;     /* Enable McBSP0 Rx/Tx Events */
    *(volatile Uns *) ESR = temp;     /* Force Rx Event Start */

}
void EDMA_Enable(unsigned int channel)
{
	unsigned int temp;
	temp=0x0001;
	temp<<=channel;	
    *(volatile Uns *) EER = temp;     /* Enable McBSP0 Rx/Tx Events */
//    *(volatile Uns *) CIER = temp; 
//  *(volatile Uns *) ESR = temp;     /* Force Rx Event Start */

}