17 lines
771 B
C
17 lines
771 B
C
#include "header.h"
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// Set up Timer1 in CTC mode to trigger every 20ms
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// With 16MHz clock and prescaler of 8, and OCR1A = 39999:
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// 16MHz/8/40000 = 50Hz = 20ms period
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#define T1B_PRESCALE_VALUE 64
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void timer_1B_init() {
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TCCR1A = 0; // 16.11.1 : Normal operation, OC1A/OC1B disconnected
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TCCR1B = (1 << WGM12); // 16.11.2 : CTC mode
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TCCR1B |= T1_PRESCALE_SET(T1B_PRESCALE_VALUE); // 16.11.2 : prescaler = 8
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OCR1A = TIME_MS(20, T1B_PRESCALE_VALUE); // 16.11.5 : Compare match value for register A
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OCR1B = TIME_MS(20, T1B_PRESCALE_VALUE) - 1000; // 16.11.6 : Compare match value for register B
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// TIMSK1 = (1 << OCIE1B); // Enable Timer1 Compare B Match Interrupt
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// ADCSRA |= (1 << ADSC); // 24.9.2 : start first conversion
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} |