79 lines
1.9 KiB
C
79 lines
1.9 KiB
C
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#include <avr/io.h>
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#include <avr/interrupt.h>
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volatile uint8_t button_reset_counter;
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volatile uint8_t main_count;
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volatile uint8_t current_segment = 0;
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const uint8_t digits[] = {0xC0, 0xF9, 0xA4, 0xB0, 0x99, 0x92, 0x82, 0xF8, 0x80, 0x90};
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const uint8_t segments[] = {0x0E, 0x0D, 0x0B, 0x07};
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// decrease reset_counter until 0
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ISR(TIMER2_OVF_vect)
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{
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PORTC &= 0xF0;
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PORTC |= segments[current_segment];
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int count_disp[4];
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int count_copy = main_count;
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for(int i = 0; i < 4; i++){
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count_disp[i] = count_copy % 10;
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count_copy /= 10;
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}
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PORTA = digits[count_disp[current_segment]];
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current_segment = (current_segment + 1) % 4;
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button_reset_counter -= button_reset_counter == 0 ? 0 : 1;
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}
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// update press_counter on interrupt if reset == 0
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ISR(PCINT2_vect){
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if (button_reset_counter == 0){
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main_count++;
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button_reset_counter = 255;
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}
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}
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int main(void) {
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DDRA = 0xFF;
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// C7 as input for external interrupt
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DDRC &= ~_BV(DDC7);
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PORTC |= _BV(PORTC7);
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// C0:3 as segment out
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DDRC = 0x0F;
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// TIMER 2 setup
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TCCR2B |= _BV(CS22);// | _BV(CS21) | _BV(CS20);
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TIMSK2 |= _BV(TOIE2);
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cli();
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// rising edge interrupt on INT2
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EICRA |= _BV(ISC20);
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EIMSK |= _BV(INT2);
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// enable external interrupt for pin 23 - PC7
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PCMSK2 |= _BV(PCINT23);
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PCICR |= _BV(PCIE2);
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sei();
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while(1) {
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// if(przyciskZablokowany1 && (PIND & (1<<PD2))) przyciskZablokowany1++;
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// if(!przyciskZablokowany2 && !(PIND & (1<<PD1))) {
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// if(dioda2 == 0)
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// dioda2 = 1;
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// else dioda2 = 0;
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// przyciskZablokowany2 = 1;
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// }
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// else if(przyciskZablokowany2 && (PIND & (1<<PD1))) przyciskZablokowany2++;
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// if(!przyciskZablokowany3 && !(PIND & (1<<PD0))) {
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// liczba = (liczba + 1) % 10;
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// przyciskZablokowany3 = 1;
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// }
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// else if(przyciskZablokowany3 && (PIND & (1<<PD0))) przyciskZablokowany3++;
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}
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return 0;
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}
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