| 0,0 → 1,41 |
|---|
| |
| #include <avr/io.h> |
| #include <avr/interrupt.h> |
| #include "main.h" |
| #include "timer.h" |
| |
| volatile uint8_t timer; |
| volatile uint8_t counter, counter2; |
| volatile uint8_t key; |
| volatile uint8_t rs232_timer; |
| |
| |
| ISR(SIG_OUTPUT_COMPARE0) // Timer-Interrupt (100 Hz) |
| { |
| if (counter > 0) |
| counter --; |
| else |
| { |
| counter = 10; |
| key = (~PINA >> 4) & 0x0F; |
| counter2 ++; |
| } |
| |
| if (timer > 0) |
| timer --; |
| |
| if (rs232_timer > 0) |
| rs232_timer --; |
| |
| } |
| |
| void timer_init (void) |
| { |
| TCCR0 = (1<<CS02)|(1<<CS00)|(1<<WGM01); // Prescaler 1024 |
| // OCR0 = 72; // Interrupt 100Hz für 7,372800 MHz-Quarz |
| |
| // OCR0 = (F_CPU / ( 100 * 2 * 1024)) -1 ; |
| OCR0 = (F_CPU / ( 100L * 1024L)) ; |
| |
| TIMSK |= (1<<OCIE0); // Interrupt freigeben für OCR |
| } |