#include <hardware.h>
#include <SPCE061V004.H>
#define	P_Flash_Ctrl (volatile unsigned int *)(0x7555)

void main()
{
  unsigned int temp,value;
  int keycheck,flash;
  unsigned int *point;
  *P_IOA_Dir=0xff0f;  //初始化IO口，A口低位做鍵盤掃描，B口低位做輸出
  *P_IOA_Attrib=0xff0f;
  *P_IOB_Dir=0xffff;
  *P_IOB_Attrib=0xffff;
  keycheck=flash=0;
  point=0xbc00;
  if(*point==0xffff)//第一次運行程序時向0xbc00寫0
  {
    *P_Flash_Ctrl=0xaaaa;
    *P_Flash_Ctrl=0x5511;
    *point=0x0000;
    *P_Flash_Ctrl=0xaaaa;
    *P_Flash_Ctrl=0x5533;
    *point=0x0000;     
    value=1;
  }
  while(1)
  {
    *P_Watchdog_Clear=1;
    *P_IOA_Data&=0xff00;
    *P_IOA_Data^=0x00fe;  //掃描鍵盤第一行
    temp=*P_IOA_Data;
    temp^=0x00fe;
    if(temp==0x0080)  //按下第四鍵，標記位置1
      keycheck=1;
    if(keycheck==1&&temp==0)//當按鍵抬起時開始操作
    {
      keycheck=0;
      flash=1;
    }
    if(flash==1)  //將當前value值寫入0xbc00
    {
      flash=0;
      *P_Flash_Ctrl=0xaaaa;
      *P_Flash_Ctrl=0x5511;
      *point=0x0000;
      *P_Flash_Ctrl=0xaaaa;
      *P_Flash_Ctrl=0x5533;
      *point=value; 
      value++;  
    }
    *P_Flash_Ctrl=0xaaaa;//讀值
    *P_IOB_Data=*point;
    
  }
}