main.c

基于dm642的flash烧写程序（不用ti的烧写工具flashburn） flash：sst39vf1601

#include "type.h"
#include <stdio.h>
#include "sst1601.h"
#include "FB.h"

static volatile u8 *src0  = (volatile u8 *)0x00000000;
static volatile u32 length0 = (u32)0xa0;
static volatile u16 *dst0  = (volatile u16 *)BaseAddrs;

static volatile u16 *src1  = (volatile u16 *)0x00000400;
static volatile u32 length1 = (u32)0x14b2;
static volatile u16 *dst1  = (volatile u16 *)0x90000800;





main()
{

//chip erase
  Erase_Entire_Chip();

//write bootloader
  BurnBoot((u8 *)src0,length0);

//write src to dst
  BurnFlash((u16 *)src1,length1);
}

//burnflash
BurnBoot(u8 *data, u32 nBytes)
{
	u32 timeout;
	u16 c;
	volatile u8 *pdata;

    
	while(nBytes--)		
	{
		*(volatile u16 *)(BaseAddrs+0xaaaa) = (u16)0x00AA;/*change*/
		*(volatile u16 *)(BaseAddrs+0x5554) = (u16)0x0055;
		*(volatile u16 *)(BaseAddrs+0xaaaa) = (u16)0x00A0;

        pdata = (volatile u8 *)((u32)dst0);
		*pdata = *data;
		
		/* Spin here 'til programming completes
		 */
		c = *data++;
		timeout = 0;
		do timeout += 1;
		while(*pdata != c && timeout < (u16)0xffff);	
		dst0++;
	}
	
    /* Put the Flash in normal mode */    
    *(volatile u16 *)BaseAddrs = (u16)0xf0;
}

//burnflash
BurnFlash(u16 *data, u32 nBytes)
{
	u16 timeout;
	u16 c;
	volatile u16 *pdata;

	while(nBytes--)		
	{
		*(volatile u16 *)(BaseAddrs+0xaaaa) = (u16)0x00AA;/*change*/
		*(volatile u16 *)(BaseAddrs+0x5554) = (u16)0x0055;
		*(volatile u16 *)(BaseAddrs+0xaaaa) = (u16)0x00A0;

        pdata = (volatile u16 *)((u32)dst1);
		*pdata = *data;
		
		/* Spin here 'til programming completes
		 */
		c = *data++;
		timeout = 0;
		do timeout += 1;
		while(*pdata != c && timeout < (u16)0xffff);	
		dst1++;
	}
	
    /* Put the Flash in normal mode */    
    *(volatile u16 *)BaseAddrs = (u16)0xf0;
}

u8 Erase_Entire_Chip(void)
{
    u8  ReturnStatus=TRUE;

	*(u16 *) (BaseAddrs + 0xaaaa) = (u16)0x00AA;     // write data 0x00AA to device addr 5555H
	*(u16 *) (BaseAddrs + 0x5554) = (u16)0x0055;     // write data 0x0055 to device addr 2AAAH
	*(u16 *) (BaseAddrs + 0xaaaa) = (u16)0x0080;     // write data 0x0080 to device addr 5555H
	*(u16 *) (BaseAddrs + 0xaaaa) = (u16)0x00AA;     // write data 0x00AA to device addr 5555H
	*(u16 *) (BaseAddrs + 0x5554) = (u16)0x0055;     // write data 0x0055 to device addr 2AAAH
	*(u16 *) (BaseAddrs + 0xaaaa) = (u16)0x0010;     // write data 0x0010 to device addr 5555H
    ReturnStatus = Check_Toggle_Ready(0, ChipEraseTime);        // wait TOGGLE bit stops toggling
//  ReturnStatus = Check_Data_Polling(0, 0xFFFF, ChipEraseTime);// wait until DQ7 outputs 1
    return ReturnStatus;
}

u8 Check_Toggle_Ready (u32 Dst, u32 MaxCycles)
{
    u16 CurrData, PreData;
    u32  TimeOut = 0;

    PreData = *(u16 *) (BaseAddrs + Dst * AddrsShift);      // read data
    PreData = PreData & 0x0040;                              // get DQ6
    while (TimeOut < MaxCycles)	                         // check if time-out
    {
        CurrData = *(u16 *) (BaseAddrs + Dst * AddrsShift); // read again
        CurrData = CurrData & 0x0040;                        // retrieve bit DQ6 
        if (PreData == CurrData)
		 { Delay_1_Microsecond( );                       // delay 1us for bus recovery
		   return TRUE;                                  // return true if DQ6 stops toggling.
		  }
	    PreData = CurrData;
        TimeOut++;
    }
	return FALSE;   // timeout error
}

void     Delay_1_Microsecond(void)         // delay 1us
         { int i;
           for(i=0; i<70; i++);            // change number 70 according to application system speed.
          }