//6 digit clock
//Using timer1 16bit counter interrupt
// PIC16F627A or PIC16F628
// Internal Clock 4MHz
#define MODE PORTB.F4
#define SET PORTB.F5
#define Sec_port_l PORTA.F6
#define Sec_port_h PORTA.F4
#define Min_port_l PORTA.F3
#define Min_port_h PORTA.F2
#define Hr_port_l PORTA.F1
#define Hr_port_h PORTA.F0
#define Blink PORTA.F7
#define HTMR1 0x80
#define LTMR1 0x00
typedef unsigned short uns8;
uns8 i;
uns8 hr_h;
uns8 hr_l;
uns8 min_h;
uns8 min_l;
uns8 sec_h;
uns8 sec_l;
uns8 tick;
uns8 myTimer;
uns8 setting_time;
void setup ();
void set_time ();
void show_time ();
void display (uns8 digit);
void blink_digit (uns8 digit);
void check_bt ();
//void check_bt(); //chech button
void interrupt ()
{
PIR1.TMR1IF = 0;
// clears TMR1IF
TMR1H = HTMR1;
tick = 1;
Blink = 1;
sec_l ++;
if(sec_l>9){
sec_l = 0;
sec_h++;
}
if(sec_h>5){
sec_h=0;
min_l++;
}
if(min_l>9){
min_l = 0;
min_h++;
}
if(min_h>5){
min_h = 0;
hr_l++;
}
if(hr_l>9){
hr_l = 0;
hr_h++;
}
if(hr_h >2){
hr_h = 0;
}
if(hr_h >=2 && hr_l>3){
hr_h = 0;
hr_l = 0;
}
}
void main ()
{
setup ();
//Set time
hr_h = 1;
hr_l = 2;
min_h = 3;
min_l = 4;
sec_h = 5;
sec_l = 6;
show_time ();
setting_time = 1;
set_time();
while (1)
{
//blink_digit();
if (tick)
{
tick = 0;
show_time ();
Delay_ms (300);
Blink = 0;
}
check_bt ();
}
}
void setup ()
{
tick = 0;
//Digital output on PORTA
CMCON = 0x07;
//Input buttons + external clock
TRISB = 0xB0;
PORTB = 0x00;
TRISA = 0x00;
PORTA = 0x00;
//Internal Clock 4MHz
PCON.OSCF = 1;
// Prescaler 1:1 external clock
T1CON = 0x0F;
PIE1.TMR1IE = 0; // disable interupt to stop the clock
INTCON = 0xC0;
// Set GIE, PEIE
TMR1L = LTMR1;
TMR1H = HTMR1;
// TMR1 starts at 0x0BDC = 3036 to make TMR1 counts to 62500 and
// overclows in every 0.1 sec
// Math: 1/500000*8*62500 = 0.1
// 1/5000000 : time for 20MHz crystal (internal clock will be 20/4 = 5MHz)
// 8: prescaler
// 62500: TMR1 counts to 62500
// Counting number of overflows to 10 will get 1 sec.
}
void show_time ()
{
display (1);
display (2);
display (3);
display (4);
display (5);
display (6);
}
void display (uns8 digit)
{
switch (digit)
{
case 1 :
PORTB = hr_h;
Hr_port_h = 1;
Hr_port_h = 0;
break;
case 2 :
PORTB = hr_l;
Hr_port_l = 1;
Hr_port_l = 0;
break;
case 3 :
PORTB = min_h;
Min_port_h = 1;
Min_port_h = 0;
break;
case 4 :
PORTB = min_l;
Min_port_l = 1;
Min_port_l = 0;
break;
case 5 :
PORTB = sec_h;
Sec_port_h = 1;
Sec_port_h = 0;
break;
case 6 :
PORTB = sec_l;
Sec_port_l = 1;
Sec_port_l = 0;
break;
}
}
void blink_digit (uns8 digit)
{
switch (digit)
{
case 1 :
PORTB = 0xFF;
Hr_port_h = 1;
Hr_port_h = 0;
Delay_ms (100);
display (1);
Delay_ms (100);
break;
case 2 :
PORTB = 0xFF;
Hr_port_l = 1;
Hr_port_l = 0;
Delay_ms (100);
display (2);
Delay_ms (100);
break;
case 3 :
PORTB = 0xFF;
Min_port_h = 1;
Min_port_h = 0;
Delay_ms (100);
display (3);
Delay_ms (100);
break;
case 4 :
PORTB = 0xFF;
Min_port_l = 1;
Min_port_l = 0;
Delay_ms (100);
display (4);
Delay_ms (100);
break;
case 5 :
PORTB = 0xFF;
Sec_port_h = 1;
Sec_port_h = 0;
Delay_ms (100);
display (5);
Delay_ms (100);
break;
case 6 :
PORTB = 0xFF;
Sec_port_l = 1;
Sec_port_l = 0;
Delay_ms (100);
display (6);
Delay_ms (100);
break;
}
}
void set_time ()
{
i = 1;
while (setting_time)
{
blink_digit (i);
while (SET == 0)
{
Delay_ms (5);
switch (i)
{
case 1 :
hr_h ++;
if (hr_h > 2)
{
hr_h = 0;
}
break;
case 2 :
hr_l ++;
if (hr_l > 9)
{
hr_l = 0;
}
if (hr_h >= 2 && hr_l > 3)
{
hr_l = 0;
}
break;
case 3 :
min_h ++;
if (min_h > 5)
{
min_h = 0;
}
break;
case 4 :
min_l ++;
if (min_l > 9)
{
min_l = 0;
}
break;
case 5 :
sec_h ++;
if (sec_h > 5)
{
sec_h = 0;
}
break;
case 6 :
sec_l ++;
if (sec_l > 9)
{
sec_l = 0;
}
