port.h

基于AT89S8253单片机的LCD驱动程序代码

/*------------------------------------------------------------------------------------------------------------*-
 
  port.h(v1.00)

  -------------------------------------------------------------------------------------------------------------
  
  -this header file declare the used ports.

-*------------------------------------------------------------------------------------------------------------*/

//-------keypad.c---------------------------------------------------------------------------------------------
 
 #define KEYPAD_PORT P1

 sbit C1=KEYPAD_PORT^0;
 sbit C2=KEYPAD_PORT^1;
 sbit C3=KEYPAD_PORT^2;
 sbit C4=KEYPAD_PORT^3;

 sbit R1=KEYPAD_PORT^7;
 sbit R2=KEYPAD_PORT^6;
 sbit R3=KEYPAD_PORT^5;
 sbit R4=KEYPAD_PORT^4;

//------lcd.c-------------------------------------------------------------------------------------------------

 #define Lcd_Bus P0

 sbit RS=P2^0;  //数据指令选择信号
 sbit RW=P2^1;  //读写控制信号
 sbit E=P2^2;   //使能信号


/*------------------------------------------------------------------------------------------------------------*-

 -------------------------------------------THE END OF FILE----------------------------------------------------

-*------------------------------------------------------------------------------------------------------------*/