并口编程

开发平台：
Visual C++

SST39VF160.c：源码内容
							#include <stdio.h>
#include <windows.h>
#include <time.h>
#include <conio.h>
#include "s3c4510.h"
#include "sst39vf160.h"
#include "sst28sf040.h"
int Check_SST_39VF160(void)   //历程和hy的一致，先不修改
{
    WORD SST_id1;
    WORD SST_id2;
	int  ReturnStatus;
	write_rom2( SST39_CMD_ADDRESS1, SST39_READ_ID1);
    write_rom2( SST39_CMD_ADDRESS2, SST39_READ_ID2);
    write_rom2( SST39_CMD_ADDRESS1, SST39_READ_ID3);
	access_bus2(HOLD, SST39_CMD_ADDRESS1, SST39_READ_ID2, IP);
 /*   read_rom2(0x00000000);
	read_rom2(0x00000002);
	read_rom2(0x00000004);
	read_rom2(0x00000006);
	read_rom2(0x00000008);
	read_rom2(0x0000000a);
	read_rom2(0x0000000c);
	read_rom2(0x0000000e);
	read_rom2(0x00000010);
    read_rom2(0x00000012);
	read_rom2(0x00000014);
	read_rom2(0x00000016);
	read_rom2(0x00000018);
*/
    SST_id1 = read_rom2(0x00000000);
	SST_id2 = read_rom2(0x00000002);
    if ((SST_id1 == HY29_ID) && (SST_id2 == SST_39VF160))
        ReturnStatus = 0;
    else
        ReturnStatus = -1;
	write_rom2( SST39_CMD_ADDRESS1, SST39_READ_ID1);
    write_rom2( SST39_CMD_ADDRESS2, SST39_READ_ID2);  // exit get id
    write_rom2( SST39_CMD_ADDRESS1, SST39_EXIT_READ_ID);
	return(ReturnStatus);
}
int Read_39VF160(FILE* stream, DWORD Src,DWORD size)
{
	int i,count;
	DWORD SrcReadAddress = Src;
	WORD wTemp;     // 16 bit access
	if( NULL == stream )
		return -1;
	fseek( stream,0,SEEK_SET );
	count = 0;
	for( i = 1; i <= (int)(size/sizeof(WORD)); i++ ) 
	{
		wTemp = read_rom2( SrcReadAddress++ );
        SrcReadAddress++ ;
		printf("%.4x ",wTemp);
		if( i%8 == 0 ) printf("n");
		fwrite((char*)&wTemp,sizeof(WORD),1,stream );
	}
	return 0;
}
int Write_39VF160(unsigned char *Src, DWORD Dst)
{
    WORD        *SourceBuf;
    DWORD         DestBuf;
	DWORD        DestSector;
    int             Index;
    int             Count;
    WORD   SourceWord,Programmedword;
    unsigned char   Continue;
   
    
    /************************************************************************************/
    /*                                      ERASE OPERATION                             */
    /*                                                                                  */ 
    /************************************************************************************/
    DestSector   = Dst;
	Sleep(30);
	if (DestSector==0x000 || DestSector == 0x4000 || DestSector== 0x6000 || DestSector== 0x4000 || DestSector== 0x8000 || DestSector&0x0000ffff ==0x0000)
    {	write_rom2( SST39_CMD_ADDRESS1, SST39_AUTO_PG_ERASE1);
        write_rom2( SST39_CMD_ADDRESS2, SST39_AUTO_PG_ERASE2);
		write_rom2( SST39_CMD_ADDRESS1, SST39_AUTO_PG_ERASE3);
		write_rom2( SST39_CMD_ADDRESS1, SST39_AUTO_PG_ERASE4);
		write_rom2( SST39_CMD_ADDRESS2, SST39_AUTO_PG_ERASE5);
		printf("Erasing the sector 0x%.8x ....",DestSector);
		write_rom2( DestSector, SST39_AUTO_PG_ERASE6);
		printf("on doing.n");
		SST39Check_Toggle_Ready(DestSector);
        printf("Erase Done.n");
	}
		Count=0;
		Continue = TRUE;
    
    /***********************************************************************************/
    /*                        PROGRAM  OPERATION                                       */
    /*                                                                                 */
    /***********************************************************************************/
    SourceBuf = (WORD *)Src;
    DestBuf = Dst;
    if ( DestBuf == 0 ) printf("write 0 Kbyte n");
   for (Index = 0; Index < 4096; Index++)
    {
	    SourceWord = *SourceBuf++;
        if (SourceWord != 0xFFFF)    // If the data is 0xFF, don,t program it/
	    {
	
			write_rom2(SST39_CMD_ADDRESS1, SST39_AUTO_PGRM1); 
			write_rom2(SST39_CMD_ADDRESS2, SST39_AUTO_PGRM2);
			write_rom2(SST39_CMD_ADDRESS1, SST39_AUTO_PGRM3);
			write_rom2(DestBuf,SourceWord);  // program the data //
			Programmedword = SST39Check_Toggle_Ready(DestBuf); 
			 // wait for Toggle bit ready //
          
          //  Programmedword = read_rom2(DestBuf); // read back the data pragrammed /
         //  	printf("addr: 0x%lx read data: 0x%x .n",DestBuf, Programmedword );
			if (SourceWord != Programmedword)
            {
                printf("data compare error 0x%x : 0x%x.n",SourceWord,Programmedword);
				Continue = FALSE;
                break;
            }
		}
        DestBuf++; 
	    DestBuf++; 
      if ( DestBuf % 1024 == 0)
			printf("write %d Kbyte n",  DestBuf/1024); //
    }
 
    if (!Continue)
	    return(TRUE);                               /* return with error */
    else
	    return(FALSE);                              /* return with NO error */
}
WORD SST39Check_Toggle_Ready(DWORD Dst)
{
    unsigned char Loop = TRUE;
    WORD PreData;
    WORD CurrData;
	WORD ReturnData;
    unsigned long TimeOut = 0;
    PreData = read_rom2(Dst);
	access_bus2(HOLD, Dst, 0, IP);
    PreData = PreData & 0x4040;
    while ((TimeOut< 0x7FFFFFFF) && (Loop))
    {
        CurrData = read_rom2(Dst);   //操作未完成时，d6会读一次翻转一次。
		ReturnData = CurrData;
		access_bus2(HOLD, Dst, 0, IP);
      //  printf("data toggle 0x%x .n",CurrData);
        CurrData = CurrData & 0x4040;
        if (PreData == CurrData)
            Loop = FALSE;        /* ready to exit the while loop */
        PreData = CurrData;
        TimeOut++;
    }
	return(ReturnData); 
}

						