自己编写的flash烧写程序工程

				#include "..\inc\44b.h"
				#include "..\inc\44blib.h"
				#include "..\inc\def.h"
				#include "..\inc\flash.h"
				
				void  waitfor_endprog(void)//等待系统工作结束
				{  volatile U16 flashstatus,old;
				   old=*((volatile U16 *)0x0);//用察看bit5的方法来检查
				   while(1)
				    {
				       flashstatus=*((volatile U16 *)0x0);
				       if((old&0x40)==(flashstatus&0x40))
				           break;
				       else
				           old=flashstatus;
				    }
				  
				}
				
				U32  secaddr(U16 sec_index)//返回相应段的首地址
				{
				  switch(sec_index)
				   {
				    case 0:return 0;
				    case 1:return 0x2000;
				    case 2:return 0x3000;
				    case 3:return 0x4000;
				    default:return(sec_index-3)				   }
				}
				
				void flash_sectorerase(U16 sector_index)//进行相应段的删除
				{
				  U32 address;
				  address=secaddr(sector_index);
				  writeflash(0x555,0xAA);
				  writeflash(0x2AA,0x55);
				  writeflash(0x555,0x80);
				  writeflash(0x555,0xAA);
				  writeflash(0x2AA,0x55);
				  Uart_Printf("Erasing sector %d.\n",sector_index);
				  writeflash(address,0x30);
				  waitfor_endprog();  
				}
				
				void flash_erase(U32 start,U32 end)//进行从首地址到末地址的段擦除
				{
				  U16 start_i,end_i,i;
				  for(start_i=0;secaddr(start_i)				  for(end_i=start_i;secaddr(end_i)				  Uart_Printf("erase range:sector %d to sector %d\n",start_i-1,end_i-1);
				  for(i=start_i-1;i				    { flash_sectorerase(i);}
				}
				
				void chip_erase(void)//整片擦除
				{
				  writeflash(0x555,0xAA);
				  writeflash(0x2AA,0x55);
				  writeflash(0x555,0x80);
				  writeflash(0x555,0xAA);
				  writeflash(0x2AA,0x55);
				  writeflash(0x555,0x10);
				  waitfor_endprog();
				}
				
				void flash_wordprog(U32 addr,U16 dat)
				{
				  writeflash(0x555,0xAA);
				  writeflash(0x2AA,0x55);
				  writeflash(0x555,0xA0);
				  writeflash(addr,dat);
				  waitfor_endprog();
				}