namqn
//================================================= =======
// Ten chuong trinh : Mach test den chop tat tren PORTB
// Nguoi thuc hien : abc
// Ngay thuc hien : dd/mm/yyyy
// Mo ta phan cung : Dung PIC16F877A - thach anh 20MHz
// : LED giao tiep voi PORTB
// : Cuc duong cua LED noi voi Vcc
// : RB0 - RB7 la cac chan output
//================================================= =======
#include <16f877a.h>
#include <def_16f877a.h>
#device *=16 ADC=8
#FUSES NOWDT, HS, PUT, NOPROTECT, NOLVP
#use delay(clock=20000000)
void main()
{
// Thiet lap che do cho PORTB
TRISB = 0x00; // Tat ca PORTB deu la cong xuat du lieu
PORTB = 0xFF; // Tat het cac LED
While(1)
{
PORTB = 0; // Cho các LED sáng
delay_ms(500); // Tạo thời gian trễ 500ms
PORTB = 0xFF; // Cho các LED tắt
delay_ms(500); // Tạo thời gian trễ 500ms
}
}
THIEÁT KEÁ ÑOÀNG HOÀ SOÁ DUØNG PIC 16F877A
//*Write :
//*Hardware :PIC16f877A
//*Compiler :CCS C
//*=========================================
#include<16F877A.h>
#include<def_16F877a.h>
#fuses NOWDT,PUT,HS,NOPROTECT,NOLVP
#use delay(clock=20000000)
#use fast_io(b)
#use fast_io(d)
int8 i,dvis,chucs,dvim,chucm,dvih,chuch;
int32 a,b;
int32 h,k;
int32 bien;
const unsigned char dig[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};
void hienthi()
{
i=0;
while(i<24)
{
portd=0xfe;
portb=dig[dvis];
delay_us(6900);
portd=0xfd;
portb=dig[chucs];
delay_us(6900);
portd=0xfb;
portb=dig[dvim];
delay_us(6900);
portd=0xf7;
portb=dig[chucm];
delay_us(6900);
portd=0xef;
portb=dig[dvih];
delay_us(6900);
portd=0xdf;
portb=dig[chuch];
delay_us(6900);
i++;
}
}
void chuyendoi()
{
b=a/3600;
a=a%3600;
h=a/60;
a=a%60;
k=a;
chucs=k/10;
dvis=k%10;
chucm=h/10;
dvim=h%10;
chuch=b/10;
dvih=b%10;
}
void main()
{
trisb=0x0;
trisd=0x0;
bien=0;
while(1)
{
bien=bien+1;
if(bien==86400)
{
bien=0;
}
a=bien;
chuyendoi();
hienthi();
}
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