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Code:
#include <16F877A.h>
#include <DEFINE_16F877A.h>
#include <DEFINE_16F87x.h>
#fuses NOWDT,XT,NOPROTECT,NOLVP,PUT
#use delay(clock=4000000)
#use standard_io (B)
#use standard_io (A)
#define E PIN_D0
#define RS PIN_D1
#define RW PIN_D2
#define LCD_D4 PIN_D4
#define LCD_D5 PIN_D5
#define LCD_D6 PIN_D6
#define LCD_D7 PIN_D7
#bit CANCEL =0x05.1 // CANCEL = RA1
#bit OK =0x05.0 // OK = RA0
unsigned int8 key[] ; // mang luu cac so da nhap tu ban phim
const unsigned int8 num[11] = {'0','1','2','3','4','5','6','7','8','9'} ;
unsigned int8 num_ss[] ; // mang so sanh
unsigned int8 a = 0 ; // bien dem cac so nhap tu ban phim
unsigned int8 b = 1 ; // bien dem so lan sai ma
unsigned int8 d ; // bien ghi pass vao FLASH
unsigned int8 g = 1 ; // bien thong bao ghi pass vao FLASH trong lan dau tien
unsigned int8 h ; // bien luu lai tong cac so da ghi vao FLASH
void LCD_Init ( void ); // ham khoi tao LCD
void LCD_SetPosition ( unsigned int data );//Thiet lap vi tri con tro
void LCD_PutChar ( unsigned int data ); // Ham viet1kitu/1chuoi len LCD
void LCD_PutCmd ( unsigned int data ) ; // Ham gui lenh len LCD
void tao_xung_E(); // Xung kich hoat
void send_to_LCD( unsigned int data); // Dat du lieu len chan Data
void delay_ms_INT(unsigned long i)
{ unsigned long k , j ;
for(k=0;k<=i;k++) { for(j=0;j<=i;j++){;} }
}
void LCD_Init ( void )
{
delay_ms(200); // thoi gian de LCD khoi dong
output_low(RW); // RW = 0
output_low(RS); // che do gui lenh
send_to_LCD( 0x00 );
output_high ( E ); output_low ( E ); delay_ms ( 10 );
send_to_LCD( 0x03 ); /* init with specific nibbles to start 4-bit mode */
output_high ( E ); output_low ( E ); delay_ms ( 3 ); // tao xung tren chan E
output_high ( E ); output_low ( E ); delay_ms ( 3 );
output_high ( E ); output_low ( E ); delay_ms ( 3 );
send_to_LCD( 0x02 ); /* set 4-bit interface */
output_high ( E ); output_low ( E ); delay_ms ( 3 ); // tao xung tren chan E
LCD_PutCmd ( 0x2C ); /* function set (all lines, 5x7 characters) */
LCD_PutCmd ( 0x0C); /* display ON, cursor off, no blink */
LCD_PutCmd ( 0x06 ); /* entry mode set, increment & scroll left */
LCD_PutCmd ( 0x01 ); /* clear display */
}
void LCD_SetPosition ( unsigned int data )
{
send_to_LCD( swap ( data ) | 0x08 );
output_high ( E ); output_low ( E ); delay_ms ( 3 ); // tao xung tren chan E
send_to_LCD( swap ( data ) );
output_high ( E ); output_low ( E ); delay_ms ( 3 ); // tao xung tren chan E
}
void LCD_PutChar ( unsigned int data )
{
output_high( RS ); //RS = 1
output_low ( RW ); //RW = 0
send_to_LCD( swap ( data ) ); // gui 4 bit cao
output_high ( E ); output_low ( E ); delay_ms ( 3 ); // tao xung tren chan E
send_to_LCD( swap ( data ) ); //gui 4 bit thap
output_high ( E ); output_low ( E ); delay_ms ( 3 ); // tao xung tren chan E
}
void LCD_PutCmd ( unsigned int data )
{
output_low(RS); // RS = 0
output_low(RW); // RW = 0
send_to_LCD( swap(data) ); // gui 4 bit cao
output_high (E); output_low (E); delay_ms (3);
send_to_LCD( swap(data) ); // gui 4 bit thap
output_high (E); output_low (E); delay_ms ( 3 );
}
void send_to_LCD( unsigned int data )
{
output_bit ( LCD_D4, data & 0x01 );
output_bit ( LCD_D5, data & 0x02 );
output_bit ( LCD_D6, data & 0x04 );
output_bit ( LCD_D7, data & 0x08 );
}
void quetphim_hienthi()
{ PORTB = 0b111111110 ; if (RB4==0) { delay_ms_INT(50);
while(RB4==0) continue ;
delay_ms_INT(20);
LCD_PutChar('0') ; key[a++] = num[0];
} ;
if (RB5==0) { delay_ms_INT(50);
while(RB5==0) continue ;
delay_ms_INT(20);
LCD_PutChar('3') ; key[a++] = num[3];
} ;
if (RB6==0) { delay_ms_INT(50);
while(RB6==0) continue ;
delay_ms_INT(20);
LCD_PutChar('6') ; key[a++] = num[6];
} ;
if (RB7==0) { delay_ms_INT(50);
while(RB7==0) continue ;
delay_ms_INT(20);
LCD_PutChar('9') ; key[a++] = num[9];
} ;
PORTB = 0b111111101 ; if (RB4==0) { delay_ms_INT(50);
while(RB4==0) continue ;
delay_ms_INT(20);
LCD_PutChar('1') ; key[a++] = num[1];
} ;
if (RB5==0) { delay_ms_INT(50);
while(RB5==0) continue ;
delay_ms_INT(20);
LCD_PutChar('4') ; key[a++] = num[4];
} ;
if (RB6==0) { delay_ms_INT(50);
while(RB6==0) continue ;
delay_ms_INT(20);
LCD_PutChar('7') ; key[a++] = num[7];
} ;
PORTB = 0b111111011 ; if (RB4==0) { delay_ms_INT(50);
while(RB4==0) continue ;
delay_ms_INT(20);
LCD_PutChar('2') ; key[a++] = num[2];
} ;
if (RB5==0) { delay_ms_INT(50);
while(RB5==0) continue ;
delay_ms_INT(20);
LCD_PutChar('5') ; key[a++] = num[5];
} ;
if (RB6==0) { delay_ms_INT(50);
while(RB6==0) continue ;
delay_ms_INT(20);
LCD_PutChar('8') ; key[a++] = num[8];
} ;
}
#int_RB
void ngat_RB(void)
{ LCD_PutCmd(0x83);
while (OK && CANCEL) quetphim_hienthi();
if(!CANCEL) goto THOAT ;
if(!OK) {delay_ms_INT(50);
while(!OK) continue ;
delay_ms_INT(20);
if(g == 1) { LCD_PutCmd(0x01);
LCD_PutCmd(0xC0);
LCD_PutChar('W') ;
LCD_PutChar('r') ;
LCD_PutChar('i') ;
LCD_PutChar('t') ;
LCD_PutChar('t') ;
LCD_PutChar('i') ;
LCD_PutChar('n') ;
LCD_PutChar('g') ;
LCD_PutChar(' ') ;
LCD_PutChar('F') ;
LCD_PutChar('L') ;
LCD_PutChar('A') ;
LCD_PutChar('S') ;
LCD_PutChar('H') ;
for (d=1;d<=a;d++)
{ write_eeprom(d,key[d]);
PORTC = 0x08 ;delay_ms(250);PORTC = 0x00 ;
};
g ++ ;
h = a ; goto THOAT ; // luu lai tong cac so da nhan & THOAT
};
if (a == h )
{ LCD_PutCmd(0x01);
LCD_PutCmd(0xC0);
LCD_PutChar('R') ;
LCD_PutChar('e') ;
LCD_PutChar('a') ;
LCD_PutChar('d') ;
LCD_PutChar('i') ;
LCD_PutChar('n') ;
LCD_PutChar('g') ;
LCD_PutChar(' ') ;
LCD_PutChar('F') ;
LCD_PutChar('L') ;
LCD_PutChar('A') ;
LCD_PutChar('S') ;
LCD_PutChar('H') ;
for (d=1;d<=a;d++)
{ num_ss[d]= read_eeprom(d);delay_ms(250);
if(key[d]!=num_ss[d]) goto HERE ;};
LCD_PutCmd(0x01);
LCD_PutCmd(0x84);
LCD_PutChar('D') ;
LCD_PutChar('U') ;
LCD_PutChar('N') ;
LCD_PutChar('G') ;
LCD_PutChar(' ') ;
LCD_PutChar('M') ;
LCD_PutChar('A') ;
PORTC = 0x08 ;
delay_ms(2000) ;
PORTC = 0x00 ;
b = 1 ;
goto THOAT ;
HERE :
LCD_PutCmd(0x01);
LCD_PutCmd(0x84);
LCD_PutChar('W') ;
LCD_PutChar('R') ;
LCD_PutChar('O') ;
LCD_PutChar('N') ;
LCD_PutChar('G') ;
LCD_PutChar('!') ;
delay_ms(1000) ;
} ;
if (a!=h ){ LCD_PutCmd(0x01);
LCD_PutCmd(0x84);
LCD_PutChar('S') ;
LCD_PutChar('A') ;
LCD_PutChar('I') ;
LCD_PutChar(' ') ;
LCD_PutChar('M') ;
LCD_PutChar('A') ;
delay_ms(1000) ;
} ;
} ;
b ++ ;
THOAT :
a = 0 ;
LCD_PutCmd(0x01);
LCD_PutCmd(0xC5);
LCD_PutChar('R') ;
LCD_PutChar('e') ;
LCD_PutChar('a') ;
LCD_PutChar('d') ;
LCD_PutChar('y') ;
LCD_PutChar('!') ;
if((b%4)==0) { PORTC = 0x04 ; delay_ms(1); PORTC = 0x00 ; b = 1 ; } ;
}
void main()
{ set_tris_A(0xFF); PORTA = 0xFF ;
set_tris_B(0xF0);
set_tris_C(0x00); PORTC = 0;
set_tris_D(0x00);
LCD_Init();
enable_interrupts(global);
enable_interrupts(int_RB);
ext_int_edge(H_to_L);
LCD_PutCmd(0xC5);
LCD_PutChar('R') ;
LCD_PutChar('e') ;
LCD_PutChar('a') ;
LCD_PutChar('d') ;
LCD_PutChar('y') ;
LCD_PutChar('!') ;
while(1){PORTB = 0xF0 ;} ;
}
. Chỉ cần đợi 10us là được rồi, như vậy vẫn còn nhiều đấy.
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