46 lines
563 B
C
46 lines
563 B
C
#include <avr/io.h>
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#include <util/delay.h>
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#include <avr/interrupt.h>
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#include "include/uart.h"
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#include "include/timer.h"
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uint8_t sec = 0;
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uint16_t cnt = 0;
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int main()
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{
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/* With this MCU frequency, it is 38,4k baud */
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uart_init(12);
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/* Make PB2 an output pin */
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DDRB |= (1 << DDB2);
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initCtcTimer0();
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sei();
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while (1) {
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if ((PORTB & (1 << PB2)) > 1)
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{
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_delay_ms(1);
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PORTB &= ~(1 << PB2);
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}
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if (cnt == 65500) {
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printf("%u\n\r", TCNT0);
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cnt = 0;
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}
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cnt++;
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}
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return 0;
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}
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ISR(TIMER0_COMPA_vect)
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{
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PORTB |= (1 << PB2);
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} |