/* Project cyclecounter03
PIC16F877A
*/

#include <pic.h>
#include "font7s.h"


__CONFIG(
PWRTEN
& BORDIS
& UNPROTECT
& WDTDIS
& LVPDIS
& HS
);
__IDLOC(F877);

#define BCD_A RC0
#define BCD_B RC1
#define BCD_C RC2
#define BCD_D RC3

#define CK RC5
#define RES RA5

#define LED1 RB5
#define LED2 RB4
#define LED3 RB3
#define LED4 RB2
#define LED5 RB1
#define LED6 RB0


unsigned char dig7;
unsigned char ptn7[7];
unsigned char sel7[] = {
0b00000001,
0b00000010,
0b00000100,
0b00001000,
0b00010000,
0b00100000,
0b01000000
};

unsigned char x[7];
unsigned char i, A, B, C, D;


void interrupt entry(void){

if(TMR1IF){
TMR1IF = 0;


CK = 1;
NOP();
CK = 0;
NOP();
RES = 1;
NOP();
RES = 0;
NOP();
TMR1H = 158; TMR1L = 115;
}
}


void main(void){

CMCON = 0b00000111;
ADCON0 = 0b10000000;
T1CON = 0b00000001;
PIE1 = 0b00000001;
INTCON = 0b01000000;
TMR1IF = 0;
ei();

OPTION = 0b10000010;

PORTA = 0;
TRISA = 0b00000000;
PORTB = 0;
TRISB = 0b00000000;
PORTD = 0;
TRISD = 0b00000000;
PORTC = 0;
TRISC = 0b00001111;
PORTE = 0;
TRISE = 0b00000000;


while(1){
for(dig7 = 0; dig7 < 7; dig7++){

if(BCD_A) {
A = 1;
} else {
A = 0;
}
if(BCD_B) {
B = 1;
} else {
B = 0;
}
if(BCD_C) {
C = 1;
} else {
C = 0;
}
if(BCD_D) {
D = 1;
} else {
D = 0;
}

x[dig7] = D*8 + C*4 + B*2 + A;

if(x[6] == 0){
ptn7[6] = FONT7S_BLANK;
if(x[5] == 0){
ptn7[5] = FONT7S_BLANK;
if(x[4] == 0){
ptn7[4] = FONT7S_BLANK;
if(x[3] == 0){
ptn7[3] = FONT7S_BLANK;
if(x[2] == 0){
ptn7[2] = FONT7S_BLANK;
}
}
}
}
}

ptn7[dig7] = font7s[x[dig7]];
PORTD = ptn7[dig7 + 1];
PORTB |= sel7[dig7];

for(i = 0; i < 10; i++){
for(i = 0; i < 10; i++){
NOP();
}
}

PORTB &= ~sel7[dig7];
}
}
}

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