another revise na naman..... sensya na...
#include<pic.h>
#include <htc.h> // Required to interface with delay routines
#ifndef _XTAL_FREQ
// Unless already defined assume 4MHz system frequency
// This definition is required to calibrate __delay_us() and __delay_ms()
#define _XTAL_FREQ 4000000
#endif
__CONFIG(XT & WDTDIS & LVPDIS & UNPROTECT);
int i=0,j,m=0;
unsigned char code1[10] ,user1[4];
unsigned char scanned_key = 0x00;
unsigned char decoded_key = 0x00;
void init_LED(void)
{
PORTB = 0xF0;
TRISB = 0xF0;
}
void init_KEYPAD(void)
{
TRISD = 0x70; //PORTD<6:4> input, COLUMNS
TRISD = ~0x0F; //PORTD<3:0> output, ROWS
PORTD = 0b00001111; //PORTD<3:0> initially high
}
unsigned char decode_key(unsigned char val)
{
unsigned char key;
switch(val)
{
case 0x60: //0
key = 0x01;
break;
case 0x50: //1
key = 0x02;
break;
case 0x30: //2
key = 0x03;
break;
case 0x61: //3
key = 0x04;
break;
case 0x51: //4
key = 0x05;
break;
case 0x31: //5
key = 0x06;
break;
case 0x62: //6
key = 0x07;
break;
case 0x52: //7
key = 0x08;
break;
case 0x32: //8
key = 0x09;
break;
case 0x63: //9
key = 0x0A;
break;
case 0x53: //10
key = 0x0B;
break;
case 0x33: //11
key = 0x0C;
break;
default:
key = decoded_key;
break;
}
return key;
}
void display_key(unsigned char key)
{
PORTB = key;
}
unsigned char scan_keypad()
{
unsigned char val_1 = 0x00;
unsigned char val_2 = 0x00;
unsigned char count1;
for(count1=0;count1 < 4;count1++)
{
PORTD = ~(0x01 << count1); //scan row
__delay_ms(35);
val_1 = PORTD & 0x70; //read column, RD<6:4>
//while clearing RD<7> &
//RD<3:0>
if (val_1 != 0x70) //if a column is pressed
{
val_2 = (val_1 | count1); //column (high-nibble) and count (low-nibble)
return val_2; //return value
}
}
return 0xFF; //return any value
}
void code_enter(void)
{
i=0; //on the first character of code1 has been position... reading of value of code[0]
while(decoded!=0x0a) //if the enter button is not press then wait for input, else stop looping and return to main...
{
scanned_key=0;// reinitialize scan key as empty
while(scanned_key==0) if the key is still no input detect then you must be in loop
{
scanned_key = scan_keypad();
}
decoded_key = decode_key(scanned_key);
code1 = display_key; //store one character/number of code to their designated array index..
display_key(decoded_key); //display nga ba ito hehehe di ko alam ang gamit nito eh?
i++;
}
}
void code_read(void) //Read data from EEPROM
{
__delay_ms(20);
user1[0] = eeprom_read(0x00); // Read data from address 0
__delay_ms(20);
user1[1] = eeprom_read(0x01); // Read data from address 2
__delay_ms(20);
user1[2] = eeprom_read(0x02); // Read data from address 4
__delay_ms(20);
user1[3] = eeprom_read(0x03); // Read data from address 8
__delay_ms(20);
}
void code_write(void) //Write data from EEPROM
{
__delay_ms(20);
eeprom_write(0x00,code1[1]); // Write some data at address 00
__delay_ms(20);
eeprom_write(0x01,code1[2]); // Write some data at address 02
__delay_ms(20);
eeprom_write(0x02,code1[3]); // Write some data at address 04
__delay_ms(20);
eeprom_write(0x03,code1[4]); // Write some data at address 08
}
void change_code(void)
{
i=1;
code_enter();
code_write();
code_read();
}
void main()
{
ADCON1 = 0x07; // Configure AN pins as digital
TRISA = 0x00; // set direction to be output
RA0 =1;
init_KEYPAD();
init_LED(); // Initialize Keypad
code_read();
//If no code is stored then default is 1234
if(user1[0] == 0xFF && user1[1] == 0xFF && user1[2] == 0xFF && user1[3] == 0xFF )
{
eeprom_write(0x00,1); // Write some data at address 00
__delay_ms(20);
eeprom_write(0x01,2); // Write some data at address 02
__delay_ms(20);
eeprom_write(0x02,3); // Write some data at address 04
__delay_ms(20);
eeprom_write(0x03,4); // Write some data at address 08
}
code_read();
__delay_ms(100);
do
{
i = 0;
code_enter();
if((code1[4] == 0x0A) || code1[4]==0x0C) //if i push enter key/change code key after the 4-digit password...so the enter key/change code key must be located at code1[4]
{
if(code1[0] == 1 && code1[1] == 2 && code1[2] == 3 && code1[3] == 4)
{
if(code1[4] == 0x0C)
{change_code();}
if(code1[4]==0x0a)
{RA0=0;}
}
if(code1[0] == user1[0] && code1[1] == user1[1] && code1[2] == user1[2] && code1[3] == user1[3] )//compare code with store one
{
if(code1[4] == 0x0C)
{change_code();}
if(code1[4] == 0x0A)
{RA0 =0;
__delay_ms(50);}
}
else
{RA0=1;}
}
}
while(1);
}
February 13, 2008, 11:26:41 AM
