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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 111 | mikeljo | 1 | |
| 2 | #include <avr/io.h> |
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| 3 | #include <avr/interrupt.h> |
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| 4 | #include "main.h" |
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| 5 | #include "timer.h" |
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| 6 | |||
| 7 | volatile uint8_t timer; |
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| 8 | volatile uint8_t counter, counter2; |
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| 9 | volatile uint8_t key; |
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| 10 | volatile uint8_t rs232_timer; |
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| 11 | |||
| 12 | |||
| 13 | ISR(SIG_OUTPUT_COMPARE0) // Timer-Interrupt (100 Hz) |
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| 14 | { |
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| 15 | if (counter > 0) |
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| 16 | counter --; |
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| 17 | else |
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| 18 | { |
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| 19 | counter = 10; |
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| 20 | key = (~PINA >> 4) & 0x0F; |
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| 21 | counter2 ++; |
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| 22 | } |
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| 23 | |||
| 24 | if (timer > 0) |
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| 25 | timer --; |
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| 26 | |||
| 27 | if (rs232_timer > 0) |
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| 28 | rs232_timer --; |
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| 29 | |||
| 30 | } |
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| 31 | |||
| 32 | void timer_init (void) |
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| 33 | { |
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| 34 | TCCR0 = (1<<CS02)|(1<<CS00)|(1<<WGM01); // Prescaler 1024 |
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| 35 | OCR0 = 72; // Interrupt 100Hz für 7,372800 MHz-Quarz |
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| 36 | TIMSK |= (1<<OCIE0); // Interrupt freigeben für OCR |
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| 37 | } |