8255.c

51单片机扩展IO口的8255驱动程序

#include "MYTYPE.H"
#include "_8255.H"


W8255_1(uchar cd,uchar world)	  //写8255-1端口函数
{
   if(cd=='a'){return W8255_1A = world;}
   if(cd=='b'){return W8255_1B = world;}
   if(cd=='c'){return W8255_1C = world;}
   if(cd=='d'){W8255_1CMD = world;}
}

uchar R8255_1(uchar cd)	 //读8255-1端口函数
{
   if(cd=='a'){return W8255_1A;}
   if(cd=='b'){return W8255_1B;}
   if(cd=='c'){return W8255_1C;}  
} 




W8255_2(uchar cd,uchar world)	  //写8255-2端口函数
{
   if(cd=='a'){return W8255_2A = world;}
   if(cd=='b'){return W8255_2B = world;}
   if(cd=='c'){return W8255_2C = world;}
   if(cd=='d'){W8255_2CMD = world;}
}

uchar R8255_2(uchar cd)	 //读8255-2端口函数
{
   if(cd=='a'){return W8255_2A;}
   if(cd=='b'){return W8255_2B;}
   if(cd=='c'){return W8255_2C;}  
}