wrre_flash.c

ad转换的程序

#include <c8051f020.h>
extern unsigned int xdata canmodify_package[];
extern void writeCmd (unsigned char  command);
extern void delayMS(unsigned char MS); 
sbit CS=P1^7;    
WrRe_Flash(){
     unsigned int xdata *pwrite;
     unsigned int code *pread;  
	 unsigned char i ;
	 unsigned char i1;

              WDTCN=0xde;                    //stop watch dog
              WDTCN=0xad;
			  
              FLSCL|=0x01;
              PSCTL|=0X02;
              PSCTL|=0X01;
			 			 
              pwrite=0xa000;
              *pwrite=0;
              PSCTL&=~0X02;
			 for(i=0;i<19;i++)
             {
			   *pwrite++=canmodify_package[i];

			 } 
                 PSCTL&=~0x01; 
          pread=0xa000;                      //read the current value
      for(i1=0;i1<19;i1++)
       {
        canmodify_package[i1]=*pread++;
        }
if(canmodify_package[6]==3)
		{ 
		  CS=0;
	      delayMS(50);
		  writeCmd(0x20);
		  writeCmd(0x00);
		  writeCmd(0x10);
		  writeCmd(0x44);
		}	 
if(canmodify_package[6]==1)
	    {
		  CS=0;
		  delayMS(50);
          writeCmd(0x21);
		  writeCmd(0x00);
		  writeCmd(0x11);
		  writeCmd(0x44);
		}   	
	 }