Eeprom代码错在哪

2万 · 2015-11-21 17:20

/********************************write eeprom*******************************/
void write_eeprom(Byte write_page,Byte write_addr,Byte write_data)
{
EA=0;
      FLASHCON=1;
      XPAGE=write_page;
      IB_OFFSET=write_addr;
      IB_DATA=write_data;
      IB_CON1=0X6E;
      IB_CON2=0X05;
      IB_CON3=0X0A;
      IB_CON4=0X09;
      IB_CON5=0X06;
      _nop_();
      _nop_();
      _nop_();
      _nop_();

      XPAGE=0x00;
      FLASHCON=0;
      EA=1;
}
/********************************read eeprom********************************/
Byte read_eeprom(Byte read_page,Byte read_addr)
{
      Byte temp;
      EA=0;
FLASHCON=1;
      XPAGE=read_page;
      IB_OFFSET=read_addr;
      temp=*(Byte code *)(read_addr);
      _nop_();
      _nop_();
      _nop_();
      _nop_();

      XPAGE=0x00;
      FLASHCON=0;
      EA=1;
      return temp;
}
/********************************erase eeprom*******************************/
void erase_eeprom(Byte erase_page)
{
EA=0;
      FLASHCON=1;
      XPAGE=erase_page;
      IB_CON1=0XE6;
      IB_CON2=0X05;
      IB_CON3=0X0A;
      IB_CON4=0X09;
      IB_CON5=0X06;
      _nop_();
      _nop_();
      _nop_();
      _nop_();

      XPAGE=0X00;
      FLASHCON=0;
      EA=1;
}
/********************************主函数*************************************/
void main(void)
{
CLKCON=0X20;       //系统分频1/2=6M
      P0CR&=0x0f;    //P0.4,P0.5,P0.6,P0.7输入口
      P0PCR|=0xf0;                //输入口打开上拉电阻
      init();
      T4_init();
      T5_init();
      ADC_init();
      if(P0_7==0)
      {
         while(!P0_7);
            //erase_eeprom(0);
            //write_eeprom(0,0,79);
            //write_eeprom(0,1,80);
            //write_eeprom(0,2,81);
            erase_eeprom(1);
            write_eeprom(1,3,82);
            write_eeprom(1,4,83);
            write_eeprom(1,5,84);
            A=read_eeprom(0,0);
            B=read_eeprom(0,1);
            C=read_eeprom(0,2);
            D=read_eeprom(1,3);
            E=read_eeprom(1,4);
            F=read_eeprom(1,5);
我先是写的扇区0的数据，写正常，读出也正常，然后关掉写，直接读扇区0的数据正常，即A=79，B=80，C=81，说明已经保存到eeprom里了，但是我写扇区1，D,E,F不是应该等于82，83，84吗，怎么实际读出来D,E,F却等于79，80，81呢