sst39vf160.c

Linux下通过jtag烧写flash的源代码

#include <stdio.h>
#include <time.h>
#include "s3c4510.h"
#include "SST39VF160.h"
#include "def.h"


int Check_SST_39VF160(void)
{
    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);

    SST_id1 = read_rom2(0x00000000);
    SST_id2 = read_rom2(0x00000001);

    //printf("id1:%x id2:%x\n",SST_id1,SST_id2);
    if ((SST_id1 == SST_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++ );
		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          dl;
    int          Count;
    WORD         SourceWord;
    unsigned char   Continue;
   
   
    /**********************************************************/
    /*                    ERASE OPERATION                     */
    /*                                                        */ 
    /**********************************************************/
    DestSector   = Dst;
	
    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 0x%.8x ...",DestSector);
    write_rom2( DestSector, SST39_AUTO_PG_ERASE6);
    for(dl=0;dl<18800000;dl++);
    //printf("Done.\n");
    Count = 0;
    Continue = TRUE;
    /********************************************************************/
    /*                        PROGRAM  OPERATION                        */
    /*                                                                  */
    /********************************************************************/
    SourceBuf = (WORD*)Src;
    DestBuf = Dst;
    //for(dl=0;dl<5000000;dl++);
    SST39Check_Toggle_Ready(DestBuf);
    for (Index = 0; Index < (SST39_ROW_SIZE/sizeof(WORD)); 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 */
	    //SST39Check_Toggle_Ready(DestBuf); 
	    /* wait for Toggle bit ready */
            //ProgrammedByte = read_rom(DestBuf); 
            /* read back the data pragrammed */
            //if (SourceByte != ProgrammedByte)
            //{
            //    Continue = FALSE;
            //    break;
            //}
        }
        DestBuf++;    
    }
    if (!Continue)
	    return(TRUE);                               /* return with error */
    else
	    return(FALSE);                              /* return with NO error */
}

void SST39Check_Toggle_Ready(DWORD Dst)
{
    unsigned char Loop = TRUE;
    WORD PreData;
    WORD CurrData;
    unsigned long TimeOut = 0;

    PreData = read_rom2(Dst);
    PreData = PreData & 0x4040;
    while ((TimeOut< 0x7FFFFFFF) && (Loop))
    {
        CurrData = read_rom2(Dst);
        CurrData = CurrData & 0x4040;
        if (PreData == CurrData)
            Loop = FALSE;        /* ready to exit the while loop */
        PreData = CurrData;
        TimeOut++;
    }
}