io.c

isp1161驱动代码是我下载并该动后而成,还有点缺点,但对你可能有点帮助

extern unsigned char PacketBuffer[32];

void setpio(int ioport,int ch)
{
   *(unsigned int*)0x01802000&=~(1<<ioport);//将此端口设为输出口
   if(ch==0)
   {
   *(unsigned int*)0x01802004&=~(1<<ioport); //0 输出为0
   }
   else if(ch==1)
   {
   *(unsigned int*)0x01802004|=1<<ioport; //1 输出为1 
   }
}

char readpio(int ioport)    
{
   int t;
   *(unsigned int*)0x01802004&=~(1<<ioport); //0 输出为0
   
   *(unsigned int*)0x01802000|=(1<<ioport);//将此端口设为输入口
     
   if((*(unsigned int*)0x01802008&=(1<<ioport))==0)
   {
     return 0;
   }
   else 
   {
     return 1;
   }
}