keypad.h

Interfacing 8 bit LCD to any microcontroller

/*-------------------------------------------------------------------------------------------
KEYPAD.H
Header file to KEYPAD.C File
Project: RADIATION COUNTING SYSTEM
ELECTRONICS CORPORATION OF INDIA LIMITED, HYDERABAD
Developed By VINAY                			All rights reserved.
--------------------------------------------------------------------------------------------*/
#ifndef _keypad_H
#define _keypad_H

#define key_buffsize            10
#define key_maxrows             04
#define key_maxcoloumns         04
#include<at89x51.h>



 void scancode(void);
 void Counts_Display(void);

 union counter{
  unsigned long int countervalue;
  unsigned char counterbytes[4];
 };

union time {
 unsigned int timervalue;
 unsigned char timerbytes[2];
};

union fc{
unsigned int counts;
unsigned char counter1[2];
 };

typedef  union  counter  count1;
typedef  union  time  timevalue;
typedef union fc count2;

#endif